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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 10. Отображено 10.
16-06-2023 дата публикации

Polymer, preparation method thereof and application of polymer as aerogel

Номер: CN116262828A
Автор: ZHOU GUANGYUAN, SUN YUNLONG, NIE HERAN, WANG ZHIPENG
Принадлежит:

The invention discloses a cross-linked polyimide aerogel material with high specific surface area, low shrinkage rate and light weight as well as a preparation method and application of the cross-linked polyimide aerogel material. The structure of the cross-linked polyimide aerogel is shown in the specification, and the preparation method of the cross-linked polyimide aerogel comprises the following steps: carrying out condensation polymerization on materials containing aromatic dianhydride and trifluoroaromatic diamine to obtain a polyamic acid oligomer, then carrying out cross-linking reaction on the polyamic acid oligomer and arylamine, and then carrying out drying and imidization to obtain the aerogel. The raw materials are commercial products; the synthetic route is simple, the yield is high, and the synthetic method has universality. The polyimide aerogel disclosed by the invention has high specific surface area, the shrinkage rate of the polyimide aerogel is as low as 5%, and the ...

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Номер записи: 1
16-05-2023 дата публикации

High-bearing-capacity polymer-based water lubrication modified material and preparation method thereof

Номер: CN116120566A
Автор: ZHOU GUANGYUAN, CAO ZENGWEN, WANG ZHIPENG, WANG HONGHUA, NIE HERAN
Принадлежит:

The invention discloses a high-bearing-capacity polymer-based water lubrication modified material and a preparation method thereof, and belongs to the field of polymer composite materials. The modified material is prepared by in-situ polymerization of dopamine on the surface of a high-bearing polymer material. The modified material disclosed by the invention has good compatibility with other polymer lubricating materials, organic matters and inorganic matters, can effectively improve the bearing capacity of water-lubricated bearings based on polymers such as rubber and the like and optimize the friction performance of the water-lubricated bearings, and can also be used for modifying composite materials in the field of water-lubricated bearings such as mechanical pumps and ship tail bearings; the method is particularly suitable for high-load water-lubricated bearing materials, the bearing size can be greatly reduced, and the material strength can be improved.

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Номер записи: 2
16-05-2023 дата публикации

High-performance polymer-based water lubrication composite material as well as preparation method and application thereof

Номер: CN116120977A
Автор: ZHOU GUANGYUAN, CAO ZENGWEN, WANG ZHIPENG, WANG HONGHUA, NIE HERAN
Принадлежит:

The invention discloses a high-performance polymer-based water lubrication composite material with low friction coefficient and long service life as well as a preparation method and application thereof, and belongs to the field of polymer composite materials. The composite material comprises the following components in parts by weight: 100 parts of a high-molecular compound, 5-100 parts of a lubricant and more than 0 part and less than or equal to 50 parts of a hydrophilic polymer, the high-molecular compound is selected from at least one of polyaryletherketone, polyarylethersulfone, polyimide, polybenzimidazole, polyphenylene sulfide, polytetrafluoroethylene and ultra-high molecular weight polyethylene. The composite material disclosed by the invention is low in dry/water friction coefficient and good in wear resistance, and can be applied to the fields of water-lubricated bearings such as pump bearings, water-wheel engine main bearings and ship tail bearings.

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Номер записи: 3
04-04-2023 дата публикации

High-temperature-resistant and flame-retardant polyimide foam material and preparation method thereof

Номер: CN115895253A
Автор: ZHOU GUANGYUAN, NIE HERAN, CHEN CUNYOU
Принадлежит:

The invention provides a polyimide foam material which comprises the following raw materials in parts by weight: 15-60 parts of pyrrolone polyamide acid precursor, 15-60 parts of isocyanate, 10-40 parts of solvent, 2-8 parts of foaming agent, 5-12 parts of foam stabilizer and 0.5-5 parts of catalyst. A pyrrolone polyamide acid precursor prepared from PMDA and tetraphenylamine reacts with an isocyanate group and is foamed, a trapezoidal polyimide structure is introduced into foam through an imidization process, and the oxygen index and the mechanical property of the introduced trapezoidal polyimide rigid structure are obviously improved. The prepared foam material has the advantages and characteristics of high oxygen index, high temperature resistance and the like.

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Номер записи: 4
16-06-2023 дата публикации

Composite material and preparation method thereof

Номер: CN116262853A
Автор: ZHOU GUANGYUAN, CAO ZENGWEN, WANG ZHIPENG, NIE HERAN, WANG HONGHUA
Принадлежит:

According to the composite material and the preparation method thereof, preparation of a flat and warping-free sintered sample piece is achieved, and the composite material has a series of advantages of being simple, efficient, low in cost and the like. And even if the functional fillers such as boron nitride, graphite and carbon fiber are compounded, the sintering sample cannot be defective. The sintering technology disclosed by the invention has the advantages of wide application, low cost, simplicity, high efficiency and the like, and can be used for preparing various high-temperature-resistant resins such as polyaryletherketone and the like and composite materials thereof.

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Номер записи: 5
16-06-2023 дата публикации

Substituted benzophenone triptycene and preparation method thereof

Номер: CN116262695A
Автор: ZHOU GUANGYUAN, WANG HONGHUA, WANG ZHIPENG, NIE HERAN
Принадлежит:

The invention discloses a halogenated benzophenone compound containing a triptycene structure and a preparation method of the halogenated benzophenone compound. The preparation method has the advantages that controllable preparation of the number of reaction sites is realized, the method is simple, efficient, low in cost and the like, and the product can be applied to fluorescent tracing and explosive detection as a dye and can also be used for preparing an end-capping reagent, a monomer and a hyperbranched structure in a high polymer material.

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Номер записи: 6
16-06-2023 дата публикации

Preparation method of polyarylene ether nitrile material and application of polyarylene ether nitrile material in intrinsic ultralow dielectric material

Номер: CN116262826A
Автор: ZHOU GUANGYUAN, WANG ZHIPENG, WANG HONGHUA, NIE HERAN
Принадлежит:

According to the non-fluorine polyaryletherketone (nitrile) resin, the size and position of a long-chain side group are adjusted through a main chain structure design, tight piling among molecular chains is further reduced, a larger pore structure can be formed in the forming process, the resin has a lower dielectric constant and dielectric loss, and meanwhile, the resin has a good application prospect. The material does not generate toxic and harmful substances such as fluorophosgene during high-temperature treatment, so that the use safety of the material is ensured. The non-fluorine low-dielectric polyaryletherketone (nitrile) resin disclosed by the invention has the advantages of low dielectric constant and small dielectric loss, and is widely applied to the fields of 5G and higher-frequency communication.

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Номер записи: 7
16-06-2023 дата публикации

Triptycene structure-containing polyaryletherketone, preparation method thereof and application of triptycene structure-containing polyaryletherketone as special engineering plastic

Номер: CN116262823A
Автор: ZHOU GUANGYUAN, WANG ZHIPENG, WANG HONGHUA, NIE HERAN
Принадлежит:

The invention discloses polyaryletherketone containing a triptycene structure, a preparation method of the polyaryletherketone and application of the polyaryletherketone as special engineering plastic. Controllable preparation of end-capped, linear and hyperbranched structures is realized, the method has a series of advantages of simplicity, high efficiency, low cost and the like, and the product can be applied to polymer recovery and film processing as a dye.

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Номер записи: 8
16-06-2023 дата публикации

Polymer, preparation method thereof and application of polymer as foam material

Номер: CN116262829A
Автор: ZHOU GUANGYUAN, SUN YUNLONG, NIE HERAN, WANG ZHIPENG
Принадлежит:

The invention discloses a polymer, a preparation method thereof and application of the polymer as a foam material. The structure of the polymer is shown as a formula I. The diamine monomer is synthesized through a three-step method, the preparation route is simple, the product configuration is unique, the yield is high, and the synthesis method has universality. When the polyimide foam is used as a high-temperature-resistant material, the glass transition temperature reaches 355 DEG C, the thermal decomposition temperature of 5% reaches 520 DEG C, and the polyimide foam has a good application prospect in a high-temperature environment.

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Номер записи: 9
16-06-2023 дата публикации

Polyaryletherketone polymer containing benzil structure and preparation method thereof

Номер: CN116262824A
Автор: ZHOU GUANGYUAN, WANG ZHIPENG, NIE HERAN, WANG HONGHUA
Принадлежит:

The invention relates to a polyaryletherketone polymer containing a benzil structure and a preparation method of the polyaryletherketone polymer. Starting from molecular design of polyarylether resin, a benzil structure is introduced into a main chain, steric hindrance of a polymer side chain is increased, main chain piling of the polymer is hindered, molecular space volume is increased, and the purpose of reducing resin density is achieved. Benzil has two adjacent carbonyl groups and can be subjected to cyclization reaction with o-phenylenediamine, 1, 2-diamino structural substances and the like, so that the special engineering plastic with higher stability is obtained.

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Номер записи: 10