Flexible titanium oxide nanofiber membrane and preparation method thereof

A technology of nanofiber membrane and titanium oxide, which is applied in the direction of heating/cooling fabrics, textiles and papermaking, fabric surface trimming, etc., can solve the problems of single fiber defects, poor diameter uniformity, and easy fiber cracking, etc., and achieve simple preparation process, Good flexibility and low cost effect

Active Publication Date: 2014-11-19
嘉兴富瑞邦新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these patents add high molecular polymers when preparing titanium dioxide nanofibers, which makes the content of ceramic components in the hybrid fiber membrane low, which affects the final yield. In addition, too much organic matter can easily lead to severe shrinkage of the hybrid fiber membrane during the calcination process. , become hard and brittle, and the mechanical properties of the fiber membrane are poor
Chinese patent CN201310223225.9 discloses a method for preparing a silica/titania composite mesoporous flexible non-woven fiber membrane. However, in this patent, polymers need to be added during the preparation of silica/titania composite nanofibers, and the precursor solution is prepared The proportion of titanium salt in the medium is low, resulting in a very low proportion of final titanium oxide nanofibers
Ceramics International38 (2012) 883-886 uses electrospinning technology to prepare titania-silicon oxide flexible cera...

Method used

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  • Flexible titanium oxide nanofiber membrane and preparation method thereof
  • Flexible titanium oxide nanofiber membrane and preparation method thereof
  • Flexible titanium oxide nanofiber membrane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0048] A method for preparing a flexible titanium oxide nanofiber membrane, the specific steps are:

[0049] Step 1: Dissolve titanium source tetraethyl titanate and non-titanium metal salt magnesium chloride hexahydrate in sequence in a mixed solvent of ethanol / acetic acid, stir for 30 minutes, add coupling agent γ-aminopropyltriethoxysilane, and then Add surfactant dodecyl dimethyl benzyl ammonium chloride after continuous stirring for 10 min, wherein the molar ratio of tetraethyl titanate to magnesium chloride hexahydrate is 100:0.1, and the ratio of tetraethyl titanate to ethanol / acetic acid is 10g:20mL, the volume ratio of ethanol to acetic acid is 1:1, the molar ratio of tetraethyl titanate to coupling agent γ-aminopropyltriethoxysilane is 1:0.05, tetraethyl titanate and surface active The molar ratio of dodecyl dimethyl benzyl ammonium chloride is 1:0.05; uniform and stable kinematic viscosity is mixed to make a precursor solution of 0.1Pa·s and electrical conductivity ...

Embodiment 2

[0054] A method for preparing a flexible titanium oxide nanofiber membrane, the specific steps are:

[0055] Step 1: Dissolve titanium source isopropyl titanate and non-titanium metal salt aluminum nitrate nonahydrate in a mixed solvent of ethanol / hydrochloric acid in sequence, stir for 60 minutes and add coupling agent N-β-aminoethyl-γ-ammonia Propylmethyldimethoxysilane, continue to stir for 15min, then add surfactant sodium dodecylbenzenesulfonate, wherein the molar ratio of isopropyl titanate to aluminum nitrate nonahydrate is 100:1, and isopropyl titanate The ratio of ester to ethanol / hydrochloric acid is 10g:20mL, the volume ratio of ethanol to hydrochloric acid is 1:2, isopropyl titanate and coupling agent N-β-aminoethyl-γ-aminopropylmethyldimethoxy The molar ratio of base silane is 1:0.25, and the molar ratio of isopropyl titanate to surfactant sodium dodecylbenzenesulfonate is 1:0.05; mix uniformly to make a uniform and stable dynamic viscosity of 1Pa s, conductivity ...

Embodiment 3

[0059] A method for preparing a flexible titanium oxide nanofiber membrane, the specific steps are:

[0060] The first step: dissolve the titanium source tetraethyl titanate and the non-titanium metal salt calcium chloride in the mixed solvent of ethanol / acetic acid / N,N-dimethylformamide in turn, stir for 120min, and then add the coupling agent methyl Trimethoxysilane, after continuing to stir for 30min, add the surfactant dodecyl dimethyl amine oxide, wherein the molar ratio of tetraethyl titanate to calcium chloride is 100:10, tetraethyl titanate and ethanol / acetic acid The ratio of / N,N-dimethylformamide is 10g:30mL, the volume ratio of ethanol, acetic acid, N,N-dimethylformamide is 1:1:1, tetraethyl titanate and coupling agent A The molar ratio of trimethoxysilane is 1:0.25, and the molar ratio of tetraethyl titanate and surfactant lauryl dimethyl amine oxide is 1:0.2; mix well to make a uniform and stable dynamic viscosity of 5Pa s, a precursor solution with a conductivi...

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Abstract

The invention relates to a flexible titanium oxide nanofiber membrane and a preparation method thereof. The preparation method includes firstly dissolving a titanium source and a non-titanium metal salt in solvent, and sequentially adding coupling agent and surfactant to be uniformly mixed and obtain stable precursor solution with interpenetrating three-dimensional network structure molecular chains; then making the precursor solution into a precursor fiber membrane through an electrospinning technique; burning the precursor fiber membrane in the air to obtain the flexible titanium oxide nanofiber membrane. The preparation method is simple and low in cost, the obtained titanium oxide nanofiber membrane is good in flexible and has promising application prospect in the fields such as air purification, water treatment, hydrogen production by photodecomposition, dye-sensitized solar cells, lithium ion batteries and self-cleaning environment protection and energy sources.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to a flexible titanium oxide nanofiber membrane and a preparation method thereof, in particular to a flexible titanium oxide nanofiber with a precursor solution having an interpenetrating three-dimensional network structure molecular chain as a spinning solution Membrane preparation method. Background technique [0002] As an excellent semiconductor photocatalyst, titanium oxide has broad application prospects in environmental protection and energy fields such as air purification, water treatment, hydrogen production by photolysis, dye-sensitized solar cells, lithium-ion batteries, and self-cleaning. However, at present, the practical application of titanium oxide photocatalysts is mainly realized through the suspension phase system or the method of loading. Among them, the titanium oxide suspension phase system has defects such as easy aggregation, easy deactivation, difficult ...

Claims

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Application Information

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IPC IPC(8): D04H1/4382D04H1/4209D06C7/00
Inventor 丁彬宋骏毛雪韩伟东俞建勇
Owner 嘉兴富瑞邦新材料科技有限公司
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