14-02-2019 дата публикации
Номер: US20190051811A1
Принадлежит:
The present invention relates to nanofibers. In particular, the present invention relates to potassium niobate nanofibers. In an aspect of the present invention, there is provided a method of preparing the nanofibers, the method comprising: (a) dissolving niobium chloride and potassium sorbate in a solvent to obtain a first solution; (b) removing chloride precipitates formed from the first solution; (c) adding a polymer, for example polymethylmethacrylate or polyvinylpyrrolidone to the solution to obtain a second spinnable solution; and (d) electrospinning the spinnable solution to produce the fibers. The application also discloses the application of such nanofibers in the manufacture of a humidity sensor device by sputtering a metal such as Tantalum on top of the nanofibers. 1. A method of preparing fibers , the method comprising:(a) dissolving niobium chloride and potassium sorbate in a solvent to obtain a first solution;(b) removing chloride precipitates formed from the first solution;(c) adding a polymer to the solution to obtain a second spinnable solution; and(d) electrospinning the spinnable solution to produce the fibers.2. The method according to claim 1 , wherein the polymer is any one selected from the group comprising: polyvinylpyrrolidone claim 1 , poly(methyl methacrylate) claim 1 , cellulose acetate claim 1 , polyacrylonitrile claim 1 , polyvinyl alcohol and polyethylene oxide.3. The method according to claim 1 , wherein the solvent is an alcohol.4. The method according to claim 3 , wherein the alcohol is any one selected from the group comprising: methanol claim 3 , ethanol and 2-methoxyethanol dimethylformamide.5. The method according to claim 1 , wherein the molar ratio between potassium and niobium after removing the chloride precipitates is about 1.6. The method according to claim 1 , wherein the electrospinning is carried out by ejecting the spinnable solution from a plastic syringe at a constant feed rate of 0.60 ml/hour.7. The method according ...
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