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Chitosan-based gel material with double-layer-anisotropic structure as well as preparation method and application of chitosan-based gel material

An anisotropic, gel material technology, applied in chemical instruments and methods, general water supply conservation, water/sludge/sewage treatment, etc., can solve problems such as poor biodegradability, low light-to-heat conversion efficiency, and high production costs , to achieve excellent thermal insulation performance, improve light-to-heat conversion efficiency, and improve heat utilization

Active Publication Date: 2021-03-16
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of double-layer-anisotropic chitosan-based gel material and its preparation method and application, which solves the problems of high production cost, low light-to-heat conversion efficiency and poor biodegradability in the prior art. Difficult to recycle after use

Method used

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  • Chitosan-based gel material with double-layer-anisotropic structure as well as preparation method and application of chitosan-based gel material
  • Chitosan-based gel material with double-layer-anisotropic structure as well as preparation method and application of chitosan-based gel material
  • Chitosan-based gel material with double-layer-anisotropic structure as well as preparation method and application of chitosan-based gel material

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preparation example Construction

[0035] Such as Figure 6 As shown, the invention discloses a preparation method of a bilayer-anisotropic structure chitosan-based gel material, which produces a chemically cross-linked network through acid-base neutralization and gelation. Specifically include the following steps:

[0036] (1) configure chitosan solution

[0037] Prepare a chitosan solution with a mass fraction of 1% to 5%: weigh chitosan with a mass of 1-5g, disperse it in deionized water, add 2g of acid solution with pH=3 to it, and stir until the chitosan Dissolve completely to obtain chitosan solution.

[0038] (2) Configure black chitosan-ink mixture

[0039] Prepare a chitosan-ink mixture with an ink content of 1% to 10%: weigh 1-5g of chitosan, disperse it in deionized water, add 2g of an acid solution with pH=3 to it, and stir until the shell After the polysaccharide is completely dissolved, add 1-10g of ink, and stir until the black color is evenly dispersed to obtain a black chitosan-ink mixture....

Embodiment 1

[0054] (1) configure the black chitosan-ink ink mixture of ink content 1%

[0055] Weigh 1g of chitosan, disperse it in 96g of deionized water, add 2g of acetic acid solution with pH=3 to it, stir until the chitosan is completely dissolved, add 1g of ink, stir until the black color is uniformly dispersed, and the shell is obtained. Polysaccharide-ink mixture.

[0056] (2) Preparation of black chitosan hydrogel

[0057] A, the chitosan-ink mixed solution obtained by step (1) is centrifugally defoamed at a high speed, and then transferred to a single-opening mould;

[0058] B, the mold that mixed solution is housed is placed in sodium hydroxide coagulation bath and completes gelation, obtains black chitosan hydrogel;

[0059] c, using deionized water to wash the black chitosan hydrogel until the pH is neutral.

[0060] (3) Preparation of double-layer two-color chitosan hydrogel

[0061] a, configuration mass fraction 1% chitosan solution

[0062] Configuration mass fraction...

Embodiment 2

[0070] (1) configure the black chitosan-ink ink mixture of ink content 10%

[0071] Weigh 1g of chitosan, disperse it in 87g of deionized water, add 2g of hydrochloric acid solution with pH=3 to it, stir until the chitosan is completely dissolved, add 10g of ink, stir until the black color is uniformly dispersed, and the shell is obtained. Polysaccharide-ink mixture.

[0072] (2) Preparation of black chitosan hydrogel

[0073] A, the chitosan-ink mixed solution obtained by step (1) is centrifugally defoamed at a high speed, and then transferred to a single-opening mould;

[0074] B, the mold that mixed solution is housed is placed in potassium hydroxide coagulation bath and finishes gelation, obtains black chitosan hydrogel;

[0075] c, using deionized water to wash the black chitosan hydrogel until the pH is neutral.

[0076] (3) Preparation of double-layer two-color chitosan hydrogel

[0077] a, configuration mass fraction 1% chitosan solution

[0078] Configuration mas...

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Abstract

The invention belongs to the technical field of photo-thermal conversion material preparation, and particularly discloses a chitosan-based gel material with a double-layer-anisotropic structure and apreparation method thereof.The preparation method includes the following steps that adding ink into a chitosan solution, and obtaining a chitosan-ink mixed liquid; transferring the chitosan-ink mixedliquid into an alkaline coagulating bath to complete gelatinization, so as to obtain black chitosan hydrogel; washing the black chitosan hydrogel until the pH is neutral; enabling the washed black chitosan hydrogel to be in contact with a chitosan solution, and then putting the black chitosan hydrogel and the chitosan solution into an alkaline coagulating bath together until gelation is completed,so as to obtain double-layer double-color chitosan hydrogel; and soaking the double-layer double-color chitosan hydrogel with deionized water, and carrying out freeze drying to obtain the chitosan-based gel material with the double-layer anisotropic structure. A black surface layer has the light absorption capacity covering the full waveband, an anisotropic lower layer provides a high-speed watertransportation channel, and the problems that a photo-thermal material is large in heat loss and low in light utilization rate are solved.

Description

technical field [0001] The invention belongs to the technical field of preparation of photothermal conversion materials, and relates to a double-layer-anisotropic structure chitosan-based gel material and its preparation method and application. Background technique [0002] Seawater desalination is the simplest and most effective means to alleviate the global shortage of freshwater resources. Seawater desalination technologies such as multi-stage flash evaporation and multi-effect evaporation have been widely used, but there are disadvantages such as high energy consumption, low efficiency, and large secondary emissions. Plasma plasma and semiconductor light-to-heat conversion materials developed in recent years are powered by green solar energy and do not consume fossil energy in the process of use, and have received extensive attention. However, these materials have high production costs, low photothermal conversion efficiency, poor biodegradability, and difficulty in recy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L5/08C08K3/04C02F1/14C02F103/08
CPCC08J3/075C02F1/14C02F1/043C08J2305/08C08J2405/08C08K3/04C02F2103/08Y02A20/142Y02A20/124Y02A20/212
Inventor 聂景怡刘佳伟张美云梁建涛黄连青谭蕉君宋顺喜杨斌
Owner SHAANXI UNIV OF SCI & TECH
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