Aramid nano-fiber modified chitosan composite film as well as preparation method and application thereof

A nanofiber, chitosan technology, applied in membrane technology, semi-permeable membrane separation, chemical instruments and methods, etc., can solve problems such as limited application, and achieve the effects of excellent thermodynamic performance, simple preparation method, and easy availability of reagents

Active Publication Date: 2017-07-18
NANXIONG MATERIAL PRODION BASE OF CHINESE ACADEMY OF SCI GUANGZHOU CHEM +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, chitosan membrane materials prepared by researchers rarely have high-strength and high-thermal performance modified composite membranes, which limits its application

Method used

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  • Aramid nano-fiber modified chitosan composite film as well as preparation method and application thereof
  • Aramid nano-fiber modified chitosan composite film as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A kind of preparation of aramid fiber nanofiber reinforced modified chitosan composite film material, comprises the following steps:

[0044] (1) Add 5 parts by weight of aramid macro fiber raw material (KEVLER) to 100 parts by weight of dimethyl sulfoxide, then add 5 parts by weight of potassium tert-butoxide, 3 parts by weight of methanol, and stir at 50°C (150r / min ) 36h, obtain aramid fiber nanofiber dispersion liquid; Control stirring speed, can not be too fast;

[0045] (2) Add 5 parts by weight of chitosan-methanesulfonate into the aramid nanofiber dispersion (chitosan salt / aramid fiber mass ratio=1), continue to stir for 6h (150r / min), dissolve completely, and obtain Casting solution;

[0046] (3) Utilize the applicator to coat the film casting solution, put it into water and let it stand for 12 hours, then soak it in 5.0wt% sodium hydroxide solution for 2 hours, soak it in ethanol for 12 hours, soak it in n-hexane for 12 hours, take out the shaped film, Vacuum-...

Embodiment 2

[0048] A kind of preparation of aramid fiber nanofiber reinforced modified chitosan composite film material, comprises the following steps:

[0049] (1) Add 5 parts by weight of aramid macro fiber raw material (KEVLER) to 100 parts by weight of dimethyl sulfoxide, then add 5 parts by weight of potassium tert-butoxide, 3 parts by weight of methanol, and stir at 50°C (150r / min ) 36h, obtain aramid fiber nanofiber dispersion liquid; Control stirring speed, can not be too fast;

[0050] (2) Add 5 parts by weight of chitosan-hydrochloride in the aramid nanofiber dispersion (chitosan salt / aramid fiber mass ratio=1), continue to stir for 6h (150r / min), dissolve completely, and obtain cast Membrane fluid;

[0051] (3) Utilize the applicator to coat the film casting solution, put it into water and let it stand for 12 hours, then soak it in 5.0wt% sodium hydroxide solution for 2 hours, soak it in ethanol for 12 hours, soak it in n-hexane for 12 hours, take out the shaped film, Vacuum-...

Embodiment 3

[0053] A kind of preparation of aramid fiber nanofiber reinforced modified chitosan composite film material, comprises the following steps:

[0054] (1) Add 5 parts by weight of aramid macro fiber raw material (KEVLER) to 100 parts by weight of dimethyl sulfoxide, then add 5 parts by weight of potassium tert-butoxide, 3 parts by weight of methanol, and stir at 50°C (150r / min ) 36h, obtain aramid fiber nanofiber dispersion liquid; Control stirring speed, can not be too fast;

[0055] (2) Add 5 parts by weight of chitosan-sulfate into the aramid nanofiber dispersion (chitosan salt / aramid fiber mass ratio=1), continue to stir for 6h (150r / min), dissolve completely, and obtain a cast film liquid;

[0056] (3) Utilize the applicator to coat the film casting solution, put it into water and let it stand for 12 hours, then soak it in 5.0wt% sodium hydroxide solution for 2 hours, soak it in ethanol for 12 hours, soak it in n-hexane for 12 hours, take out the shaped film, Vacuum-dried...

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Abstract

The invention belongs to the technical field of chitosan composite materials and discloses an aramid nano-fiber modified chitosan composite film as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) adding aramid, an organic solvent, strong base and a dispersing aid into a container, heating, and uniformly stirring and dispersing, so as to obtain an aramid nano-fiber dispersing solution, wherein the organic solvent is a strong-polar organic solvent; and (2) adding chitosan-strong acid salt into the aramid nano-fiber dispersing solution, dissolving, carrying out film coating, adding the solution into a gel bath, standing, soaking into a cleaning agent, and drying, so as to obtain the aramid nano-fiber modified chitosan composite film. The composite film has excellent high-temperature resistance and thermodynamic property and relatively good film forming effect; and the preparation method is simple, a reagent is easily available and controllable, the cost is relatively low, and the industrial production is easily realized.

Description

technical field [0001] The invention belongs to the technical field of chitosan composite materials, and relates to a modified natural polysaccharide biomaterial using a nanostructure high-strength structural material, in particular to a chitosan composite film modified and reinforced by aramid nanofibers and its preparation Methods and applications. Background technique [0002] Polymer blending modification is an important way to realize the high performance, refinement, functionalization and development of new varieties of polymer materials. It refers to a macroscopically uniform and continuous solid polymer material formed by mixing two or more polymers by physical or chemical methods. This method can comprehensively balance the properties of polymer components, learn from each other's strengths, eliminate the weaknesses in the performance of a single polymer component, and obtain polymer materials with ideal comprehensive properties. For example: using high fluidity p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/12B01D71/06B01D71/08
CPCB01D67/0011B01D69/12B01D71/06B01D71/08
Inventor 胡继文顾云智于志伟李登峰王永超
Owner NANXIONG MATERIAL PRODION BASE OF CHINESE ACADEMY OF SCI GUANGZHOU CHEM
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