Preparation method of boric acid as standard reagent

The invention relates to a preparation method of boric acid as a standard reagent, which comprises the step of purifying borax before synthesis. Because the industrial borax raw material has high impurity, the accuracy of pH valve is influenced to further influence the quality of a product. Thus, impurities are removed in advance in the method, and the method comprises the steps of: adding sodium carbonate to a borax solution to form carbonate precipitates, and filtering to thoroughly remove the impurities; and synthesizing in the borax solution with high purity, and adjusting the pH value. The adjusted pH value is accurate, so that the content of boric acid reaches highest.

快速启动金属空气电池

The invented battery is composed of anode, cathode and electrolyte. There are electric insulation between anode and cathode, as well as diaphragm layer near to anode and active layer of quick start device glued on surface of cathode. The active layer makes battery possible to operate at expected current level, without need of a period of activation time in small current. Air cathode with gel material being added becomes more moist so as to reduce resistance force between cathode and electrolyte and promote contact between cathode and electrolyte. Thus, higher current density is obtained. The working state of charging and discharging current can be operated at room temperature without pollution. The output voltage of the invented metal air battery is 1-3V. Output power is also increased.

Method for preparing primary standard reagent potash iodate

The invention relates to a method for preparing standard reagent of potassium iodate, comprising the preparation steps as follows: (1) industrial potassium iodate is dissolved in deioned water and heated till being dissolved; potassium carbonate is then added in the solution; the solution is then mixed and reacts for 0.5-1.5 hours; subsequently, the temperature is kept for 1.5-2.5 hours; (2) hydrogen peroxide is added in the solution, the temperature is kept for 0.5-1.5 hours and the solution is filtrated subsequently; (3) pH value is adjusted to 5.5-6.5 by using potassium acid iodate; (4) pHvalue of the filtrated solution is adjusted to 4-5 by iodic acid and the solution reacts for 1.5-2.5 hours; (5) the filtrated solution is kept still and the temperature is kept; the filtrated solution is filtrated by active carbon and statically arranged and the crystal is suction-filtrated, washed by water and dehydrated by a dehydration machine; the dehydrated crystal is arranged in a drying box and ...

Method for preparing primary standard reagent potassium bichromate

The invention relates to a method for preparing a standard reagent of potassium dichromate, and the preparation steps are: (1) potassium dichromate dissolves in deionized water for forming a potassium dichromate solution; (2) barium nitrate is added in for eliminating sulfate radical, filtration is carried out after the solution keeps still, and the obtained filtrate crystallizes naturally and crystal is formed; (3) the crystal is added in the deionized water for solution; (4) Sodium Polyacrylate is added for discharging the sediment; (5) the filtrate is poured into a crystal groove for crystallization, a dewaterer for crystal is used to dewarter the crystal, the crystal after dewartering is put into a dryness box for drying at a constant temperature, and the finished product of the standard reagent of potassium dichromate is obtained. In the invention, dilute sulphuric acid is used for transferring the minute amounts of potassium chromate in the raw material into the potassium dichromate ...

Method for modifying polyester fabric biologically

The invention discloses a method for modifying a polyester fabric biologically. In the method, DTP is taken as an inducing substrate, comonas testosteroni is induced to produce lipase and oxidase, and the polyester fabric is modified by a complex enzyme. The method mainly comprises the following steps of: 1, culturing strains, namely culturing the comonas testosterone in a slope solid medium at the temperature of between 30 and 37 DEG C for 12 to 18 hours; 2, preparing bacterial suspension, namely preparing a liquid medium of which the substrate concentration is 1 to 3g/L, binding the liquid medium and sterilizing at the temperature of 121 DEG C for 25 minutes, after the liquid medium is cooled, transferring seeds in the slope solid medium to the liquid medium, and performing shaking culture at the temperature of between 30 and 37 DEG C for 12 to 36 hours under the condition that the rotating speed of a shaking incubator is 200r/min to obtain the bacterial suspension; 3, modifying the polyester ...

Method for preparing primary standard reagent potassium bichromate

The invention relates to a method for preparing a standard reagent of potassium dichromate, comprising the following preparation steps: (1) dissolving potassium dichromate in deionized water and forming a potassium dichromate solution; (2) adding barium nitrate and eliminating sulfate radical, filtering after the solution keeps still, and the obtained filtrate crystallizing naturally and forming crystal; (3) adding the deionized water to the crystal and dissolving; (4) adding sodium polyacrylate and discharging the sediment; (5) pouring the filtrate into a crystal groove for crystallization, dewatering the crystal by using a dewaterer for crystal, putting the crystal after dewartering into a dryness box and drying at a constant temperature, and obtaining the finished product of the standard reagent of potassium dichromate. In the invention, dilute sulphuric acid is used for transferring the minute amounts of potassium chromate in the raw material into the potassium dichromate entirely, ...

Preparation method of thiobenzene sulfonic acid sodium salt

The invention relates to the field of organic compound preparation methods, in particular to a preparation method of thiobenzene sulfonic acid sodium salt. The preparation method is characterized by comprising the following steps of: adding sodium benzene sulphinate and precipitated sulfur into absolute ethyl alcohol; adding isopropylamine; filtering after reaction; decompressing and distilling filtrate so as to obtain ethanol and isopropylamine; dissolving residues with hot distilled water; filtering; cooling and crystallizing; washing; and decompressing and drying so as to obtain the thiobenzene sulfonic acid sodium salt. In the preparation method, the thiobenzene sulfonic acid sodium salt is prepared by benzene sulfinic acid sodium salt instead of benzene sulfonyl chloride, so that the defects of a preparation method by using benzene sulfonyl chloride are overcome and a prepared product has high purity; moreover, the thiobenzene sulfonic acid sodium salt has fog decreasing effect and ...

Method for preparing anhydrous sodium carbonate

The invention relates to a method for preparing anhydrous sodium carbonate. The preparation method comprises the following steps: (1) dissolving industrial sodium carbonate in water to prepare aqueous solution of the industrial sodium carbonate, and adding sodium hydroxide into the solution to remove Mg2+ and Ca2+; (2) adding hydrogen peroxide into aqueous solution of the sodium carbonate in which the Mg2+ and the Ca2+ are removed to remove Fe2+; (3) introducing CO2 into the aqueous solution of the sodium carbonate in which the Fe2+ is removed; (4) filtering the aqueous solution of the sodium carbonate to obtain sodium carbonate crystals; and (5) washing, dehydrating and drying the sodium carbonate crystals to obtain an anhydrous sodium carbonate finished product serving as a reference reagent. The method can effectively remove the Mg2+, the Ca2+ and the Fe2+ in the industrial anhydrous sodium carbonate, remarkably improve the purity of the product, and meanwhile effectively solve the problem ...

System and method for remotely controlling networked home appliances using mobile telephone short message service

The system includes following parts: household gateway in use for connecting networked household electric appliances with external network, and for carrying out message exchange between networked household electric appliances and external network; through Internet connected to household gateway, server of household electric appliances in use for transferring short message and control command forwarded by gateway to household electric appliances as well as receiving state message related to household electric appliances; connected to server of appliances, short message network gateway in use for converting short message command from mobile phone to format accorded with server of household electric appliances, and sending the converted control information to server of appliances as well as converting returned state message of responding to command sent from the mobile phone to short message, which is provided for the mobile phone.

Method for preparing heptadecafluorooctanesulfonic acid tetraethylammonium salt

The invention relates to the field of organic compound preparation methods, in particular to a method for preparing heptadecafluorooctanesulfonic acid tetraethylammonium salt, which is characterized by comprising the following steps of: adding perfluoro-1-octanesulfonyl chloride, methyl triethoxysilane and triethylamine into a neck flask, and adding chlorobenzene for reaction; after the reaction is finished, draining the separated precipitate by using a suction filtering mode; washing a filter cake for multiple times by using chlorobenzene; and performing vacuum drying to obtain the heptadecafluorooctanesulfonic acid tetraethylammonium salt. The heptadecafluorooctanesulfonic acid tetraethylammonium salt prepared by the method serves as a stabilizing agent to improve the surface evenness, smoothness, friction property, anti-static property and blocking resistance of photosensitive materials.

Method for preparing reference reagent-potassium bromate

The invention belongs to a method for preparing a reference reagent, namely potassium bromate, which comprises the steps of: (1) dissolving industrial potassium bromate into deionized water, then adding potassium hydroxide into the mixed solution to ensure that the pH value of the mixed solution is between 8.2 and 9.2, then adding potassium carbonate into the mixed solution to react, and stirring and filtering the obtained product to obtain a primary filtrate; (2) adding hydrogen peroxide into the primary filtrate, keeping the mixed solution stand for 0.5 to 1.5 hours under thermal insulation, then filtering the mixed solution to obtain a secondary filtrate, adding bromine water into the secondary filtrate, using activated carbon to filter the secondary filtrate to obtain a third filtrate, then keeping the third filtrate for 10 to 18 hours, and performing suction filtration to precipitate crystals; and (3) using water to wash the crystals, then placing the crystals into a dehydrator for ...

气体扩散电极的连续干嵌制作工艺

The invention discloses a gas diffusion electrode continuous dried embedding production process for the fuel cells, which comprises preparing plaster shaped article from powdered material, filtering and drying to obtain dried powder suitable for dried embedding production process, homogeneously preheating in container, passing the flow concentration continuously and homogeneously through the container, dispersing the powder homogeneously through the spiral scattering device tot the two sides of the flow concentration, making electrode shapes in the dried embedding device, subjecting the pole pieces to thermal treatment agglutination and rolling in semi-closed heating chamber, cutting into suitable sizes and shapes longitudinally or transversely.

Method for preparing 5,7-dihydroxy-6-sulfoguanyl-s-triazole[2,3-a]bipyrimidine

The invention relates to the field of organic compound preparation methods, in particular to a method for preparing 5,7-dihydroxy-6-sulfoguanyl-s-triazole[2,3-a]bipyrimidine. The method is characterized by comprising the following steps of: dissolving 6-bromo-5,7-dihydroxy-s-triazole[2,3-a]bipyrimidine and thiourea in ethanol respectively; mixing the two kinds of solution to react; draining reacted crystals by a suction filter method; washing by using ethanol; and drying under vacuum to prepare the 5,7-dihydroxy-6-sulfoguanyl-s-triazole[2,3-a]bipyrimidine. The 5,7-dihydroxy-6-sulfoguanyl-s-triazole[2,3-a]bipyrimidine prepared by the method is used as a photosensitive emulsion stabilizer; and compared with a stabilizer-583, one more group is formed on the structure and -CH3 in the stabilizer-583 is substituted by -OH, so the 5,7-dihydroxy-6-sulfoguanyl-s-triazole[2,3-a]bipyrimidine has obvious improvement effects on suppression of aging and fog, and the emulsion prepared by the product produces ...

Enzyme activity testing method for micro-biological degradation of benzene ring

The invention discloses an enzyme activity testing method for micro-biological degradation of a benzene ring. The testing method comprises the following steps of: 1, making a standard curve of relation between substrate concentration and absorbance, and finding out a linear fitting equation between the substrate concentration and the absorbance; 2, preparing substrate solution according to enzyme or bacterial suspension of which the activity is to be measured; 3, previously heating the substrate solution and the enzyme solution to the most proper reaction temperature respectively, mixing the substrate solution and the enzyme solution, performing catalytic reaction on the mixture under the most proper reaction condition, and detecting the variation in the substrate concentration after the reaction; 4, measuring benzene ring content of the reaction solution, namely diluting the reaction solution before and after the catalytic reaction to ensure that the absorbance of the reaction solution ...

Preparation method of standard reagent calcium carbonate

The invention relates to a preparation method of standard reagent calcium carbonate, which comprises the following steps of: mixing nitric acid and industrial calcium carbonate, then adding H2O2 to remove Fe2+ out of the solution; adding Ca(OH)2 into the Ca(NO3)2 solution the Fe2+ of which is removed to remove Mg2+ out of the solution; adding an H2S aqueous solution to obtain the purified Ca(NO3)2 aqueous solution; adding (NH4)2CO3 into the solution to obtain the Ca(NO3)2 solution containing the (NH4)2CO3; fetching (NH4)2CO3 solution, adding Ca(NO3)2, and filtering after reaction to obtain the (NH4)2CO3 solution containing the Ca(NO3)2; and mixing the two solutions, and then adding Ca(OH)2 to obtain CaCO3 crystals after suction filtration. The invention can effectively remove the Mg2+, the Fe2+ and heavy metals contained in the standard reagent calcium carbonate and markedly improve the purity of products; meanwhile, the Ca(OH)2 is also added into a reaction solution, which can ensure that ...

Method for separation preparation of compound 2,4-dihydroxy-5-methyl-acetophenone by using Basidiomycetes

The invention relates to a method for preparing a compound of 2, 4-dihydroxy-5-methyl-hypnone by separating the fermentation liquid of Polyporus picipes. In the method, a method of plate-to-flask liquid culture is adopted; firstly, peeled potato, glucose and distilled water with the pH of 7.2 approximately are sterilized and made into a culture medium; then the culture medium is cultured and fermented to obtain the fermentation liquid; the fermentation liquid is extracted by ethyl acetate to obtain extractum; the extractum is separated by column chromatography and is eluted by a chloroform-methanol system in a gradient way; and the pure compound of the 2, 4-dihydroxy-5-methyl-hypnone (II) is obtained after several times of silica gel column chromatography, reverse C18 column and SephadexLH-20 gel column chromatography and separation by a recrystallization method. The invention can develop the 2, 4-dihydroxy-5-methyl-hypnone (II) into the original drug of antipathogen fungi antibiotic and ...

Method for preparing reference reagent-disodium ethylene diamine tetraacetate

The invention belongs to a method for preparing a reference reagent, namely disodium ethylene diamine tetraacetate, which comprises the steps of: (1) dissolving industrial disodium ethylene diamine tetraacetate into deionized water, filtering the mixture, adding sodium hydroxide solution into a filtrate to ensure that the pH value of the filtrate is between 9 and 11, then adding sodium carbonate into the filtrate, stirring the filtrate, ensuring that the pH value of the filtrate is between 12 and 13, then adding polyacrylate sodium into the filtrate, and filtering the filtrate; (2) adding hydrogen peroxide into the filtrate, and filtering the filtrate; (3) adding ethylenediamine tetracetic acid into the filtrate to ensure that the pH value of the filtrate is 4.5, then adding the sodium hydroxide solution into the filtrate to ensure that the pH value of the filtrate is 4.6, and using activated carbon to filter the filtrate; and (4) crystallizing the filtrate, dehydrating the obtained product ...

Biological modification method of dacron fabrics

The invention discloses a biological modification method of dacron fabrics, mainly comprising the following steps: 1. culturing strains: culturing Comamonas testosteroni in a agarslant solid culture medium for 12-18h under the temperature of 30-37 DEG C, and storing in a refrigerator at the temperature of 4 DEG C; 2. preparing a dacron modified liquid: preparing 6 parts of dacron modified liquid with the terephthalic acid concentration of 1-3g/L (each part is 150ml), respectively filling in a conical flask, and packing and sterilizing for 25min under the temperature of 121 DEG C; 3. modifying the dacron fabrics: performing ultraviolet sterilization for 0.5h on 6 parts of dacron fabrics, implanting the Comamonas testosteroni in 3 parts of dacron modified solutions, adding 3 parts of dacron fabrics into the 3 parts of dacron modified liquid respectively, taking the other three parts of dacron fabrics as a reference, performing shake cultivation at the temperature of 30-37 DEG C and with the ...

Liquid-phase electric deposition N-type and P-type one-dimensional nano line array temp. difference electric material, its equipment and preparation method

Enzyme activity testing method for micro-biological degradation of benzene ring

The invention discloses an enzyme activity testing method for micro-biological degradation of a benzene ring. The testing method comprises the following steps of: 1, making a standard curve of relation between substrate concentration and absorbance, and finding out a linear fitting equation between the substrate concentration and the absorbance; 2, preparing substrate solution according to enzymeor bacterial suspension of which the activity is to be measured; 3, previously heating the substrate solution and the enzyme solution to the most proper reaction temperature respectively, mixing the substrate solution and the enzyme solution, performing catalytic reaction on the mixture under the most proper reaction condition, and detecting the variation in the substrate concentration after the reaction; 4, measuring benzene ring content of the reaction solution, namely diluting the reaction solution before and after the catalytic reaction to ensure that the absorbance of the reaction solution ...

Method for separation preparation of compound 2,4-dihydroxy-5-methyl-acetophenone by using Basidiomycetes

The invention relates to a method for preparing a compound of 2, 4-dihydroxy-5-methyl-hypnone by separating the fermentation liquid of Polyporus picipes. In the method, a method of plate-to-flask liquid culture is adopted; firstly, peeled potato, glucose and distilled water with the pH of 7.2 approximately are sterilized and made into a culture medium; then the culture medium is cultured and fermented to obtain the fermentation liquid; the fermentation liquid is extracted by ethyl acetate to obtain extractum; the extractum is separated by column chromatography and is eluted by a chloroform-methanol system in a gradient way; and the pure compound of the 2, 4-dihydroxy-5-methyl-hypnone (II) is obtained after several times of silica gel column chromatography, reverse C18 column and Sephadex LH-20 gel column chromatography and separation by a recrystallization method. The invention can develop the 2, 4-dihydroxy-5-methyl-hypnone (II) into the original drug of antipathogen fungi antibiotic and ...

Method for degrading polyethylene terephathalate

The invention discloses a method for degrading polyethylene terephathalate. The method mainly includes the following steps: 1, strain culture: comamonas testoseroni strain is cultured for 12-18h in a solid medium with inclined surface at 30-37 DEG C; 2, substrate solution preparation: 5-9 parts of substrate solution with the concentration of 1-5g/L are prepared, each part is 50ml and is respectively placed into a 150ml conical flask, and packing up and sterilizing for 25min are carried out at 121 DEG C; 3, substrate degradation: the strain in the step 1 is inoculated into the substrate solution in the step 2, so as to obtain degradation liquor, and shake culture is carried out at the rotating speed of 200r/min and at the temperature of 30-37 DEG C, so as to catalyze degradation on the substrate; 4, substrate degradation ratio detection: 400-190nm wavelength scanning is adopted, and variation of substrate content is judged according to absorption peak at 240nm; 5, substrate degradation product ...

Method for preparing primary standard reagent sodium chloride

The invention relates to a method for preparing standard reagent of sodium chloride, comprising the steps as follows: (1) industrial salt is dissolved in deioned water and filtrated statically; (2) the filtration solution is acidified by hydrochloric acid; chlorizated salt is added in the filtration solution to remove sulfate; the filtration solution is filtrated statically; (3) the pH value of the filtration solution is adjusted by sodium hydroxide and is adjusted subsequently by adding sodium carbonate; sodium polyacrylate is added in the filtration solution; the filtration solution is filtrated statically; (4) hydrogen peroxide is added in the filtration solution which is statically filtrated; (5) the filtration solution is counteracted by hydrochloric acid; the filtration solution is evaporated, crystallized, dried by throwing method and dried in vacuum so as to form the standard reagent of sodium chloride product. The metal carbonates separated out are provided with positive charges ...

Preparation method of standard reagent calcium carbonate

The invention relates to a preparation method of standard reagent calcium carbonate, which comprises the following steps of: mixing nitric acid and industrial calcium carbonate, then adding H2O2 to remove Fe<2+> out of the solution; adding Ca(OH)2 into the Ca(NO3)2 solution in which the Fe<2+> is removed to remove Mg<2+> out of the solution; adding an H2S aqueous solution to obtain the purified Ca(NO3)2 aqueous solution; adding (NH4)2CO3 into the solution to obtain the Ca(NO3)2 solution containing the (NH4)2CO3; fetching (NH4)2CO3 solution, adding Ca(NO3)2, and filtering after reaction to obtain the (NH4)2CO3 solution containing the Ca(NO3)2; and mixing the two solutions, and then adding Ca(OH)2 to obtain CaCO3 crystals after suction filtration. The invention can effectively remove the Mg<2+>, the Fe<2+> and heavy metals contained in the standard reagent calcium carbonate and markedly improve the purity of products; meanwhile, the Ca(OH)2 is also added into a reaction solution, which can ...

Preparation method of pH standard reagent disodium hydrogen phosphate

The invention relates to a preparation method of pH standard reagent disodium hydrogen phosphate, comprising the following steps: (1) removing impurities by the sodium hydroxide; (2) removing impurities by the hydrogen peroxide; (3) crystallizing for the first time; (4) crystallizing again; and (5) drying to obtain the final product of the pH standard reagent disodium hydrogen phosphate. The preparation method of the invention uses the sodium hydroxide to remove magnesium ion and calcium ion, uses the hydrogen peroxide to oxidize the ferrous ion into the ferric ion for precipitation through the hydrolysis reaction, and uses the activated carbon to filter, so as to remove the impurities of the metallic elements completely, thereby effectively enhancing the purity of the product. In the preparation method of the invention, the recrystallization is used, the mother liquor containing trace SO4<2-> and Cl<-> is poured out, and other anion impurities are removed to enhance the accuracy of the ...

Method for preparing dithiotriethylene glycol

The invention relates to the field of methods for preparing organic compounds, in particular to a method for preparing dithiotriethylene glycol. The method is characterized by comprising the following steps of: preparing solution of sodium methoxide, and adding mercaptoethanol and 1,2-dichloroethane for reaction; after the reaction, cooling, regulating the pH, and precipitating sodium chloride; concentrating the filtrate under reduced pressure, adding acetone and ethyl acetate, cooling, stirring, separating out a precipitate and crystallizing; and filtering by using a suction filtering method so as to obtain the dithiotriethylene glycol. The prepared dithiotriethylene glycol has higher sensibilization to high-speed silver halide emulsion, slightly increases the fog value, and particularly has better effect in chemical ageing engineering; and an extra-spectral chromatogram proves that the structure and performance of the dithiotriethylene glycol reach the domestic advanced level.

Automatic control method of head orientation of laying head

The invention discloses an automatic control method for head positioning of a laying head and relates to a rolled steel laying head system. The automatic control method is characterized in that a hot metal detector is arranged on the front end of a flying shear and the front of the laying head, a photoelectric inductor is arranged above a laying disc to transmit information to a CPU for calculating the operation speed of wires and phase angle of the wire head in the laying disc, the errors are compared to correct the shearing time of the flying shear and control the sheared length. The system has the advantages that the head positioning error of the laying head is reduced, the positioning of the laying disc is realized by photoelectric tube signals, and the CPU data processing is carried out based on the wire head phase angle, rectilinear motion speed of the wires and the rotary speed of the laying disc, thus controlling the shearing time or the rotary speed of the laying disc, and cause ...

Method for modifying polyester fabric biologically

The invention discloses a method for modifying a polyester fabric biologically. In the method, DTP is taken as an inducing substrate, comonas testosteroni is induced to produce lipase and oxidase, and the polyester fabric is modified by a complex enzyme. The method mainly comprises the following steps of: 1, culturing strains, namely culturing the comonas testosterone in a slope solid medium at the temperature of between 30 and 37 DEG C for 12 to 18 hours; 2, preparing bacterial suspension, namely preparing a liquid medium of which the substrate concentration is 1 to 3g/L, binding the liquid medium and sterilizing at the temperature of 121 DEG C for 25 minutes, after the liquid medium is cooled, transferring seeds in the slope solid medium to the liquid medium, and performing shaking culture at the temperature of between 30 and 37 DEG C for 12 to 36 hours under the condition that the rotating speed of a shaking incubator is 200r/min to obtain the bacterial suspension; 3, modifying thepolyester ...

Traditional Chinese medicine physiotherapy and hot compression instrument

The invention provides a traditional Chinese medicine physiotherapy and hot compression instrument which comprises a sleeve body, a heating element fixed in the sleeve body and a traditional Chinese medicine layer, wherein the sleeve body is provided with an administration window which is used for being attached to a focus part of a human body in the position which corresponds to the traditional Chinese medicine layer; and the heating element is used for heating the traditional Chinese medicine layer to generate gas of medicine, and the heating element is electrically connected with a controller positioned outside the sleeve body. The traditional Chinese medicine layer is heated through the heating element, thereby leading molecules of the emitted gas of the medicine to penetrate epidermis of the human body and enter into the focus part of the human body for treating diseases and having the roles of easing and carrying out adjuvant therapy against symptoms (such as pain, movement disorders ...

Method for preparing primary standard reagent potash iodate

The invention relates to a method for preparing standard reagent of potassium iodate, comprising the preparation steps as follows: (1) industrial potassium iodate is dissolved in deioned water and heated till being dissolved; potassium carbonate is then added in the solution; the solution is then mixed and reacts for 0.5-1.5 hours; subsequently, the temperature is kept for 1.5-2.5 hours; (2) hydrogen peroxide is added in the solution, the temperature is kept for 0.5-1.5 hours and the solution is filtrated subsequently; (3) pH value is adjusted to 5.5-6.5 by using potassium acid iodate; (4) pH value of the filtrated solution is adjusted to 4-5 by iodic acid and the solution reacts for 1.5-2.5 hours; (5) the filtrated solution is kept still and the temperature is kept; the filtrated solution is filtrated by active carbon and statically arranged and the crystal is suction-filtrated, washed by water and dehydrated by a dehydration machine; the dehydrated crystal is arranged in a drying box ...

liquid-phase electric deposition N-type and P-type one-dimensional nano line array temp. difference electric material, its equipment and preparation method

The invention relates to the thermoelectricity material and its preparation method,especially,the n type and p typeone dimension nano linear array thermoelectricity material prepared by the liquid phase electrodeposition as wellas the equipment and the preparation method.The template method is utilized in the invention.With the porous membrane possessing the structure of the nano linear array as the template being used,and the technique of the liquid phase electrodeposition being accepted,the thermoelectricity material is deposited on the nano micropore of the porous template.Thus,the one dimension nano linear array thermoelectricity material is prepared.The minitype thermoelectric cell in micro magnitude can be made from the said thermoelectricity material.

Biological modification method of dacron fabrics

The invention discloses a biological modification method of dacron fabrics, mainly comprising the following steps: 1. culturing strains: culturing Comamonas testosteroni in a agarslant solid culture medium for 12-18h under the temperature of 30-37 DEG C, and storing in a refrigerator at the temperature of 4 DEG C; 2. preparing a dacron modified liquid: preparing 6 parts of dacron modified liquid with the terephthalic acid concentration of 1-3g/L (each part is 150ml), respectively filling in a conical flask, and packing and sterilizing for 25min under the temperature of 121 DEG C; 3. modifyingthe dacron fabrics: performing ultraviolet sterilization for 0.5h on 6 parts of dacron fabrics, implanting the Comamonas testosteroni in 3 parts of dacron modified solutions, adding 3 parts of dacronfabrics into the 3 parts of dacron modified liquid respectively, taking the other three parts of dacron fabrics as a reference, performing shake cultivation at the temperature of 30-37 DEG C and withthe ...