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Cellulose-based temperature-sensitive conductive hydrogel, and preparation method and application thereof

A temperature-sensitive, conductive hydrogel technology, applied in the field of fiber material preparation, can solve the problems of weakened mechanical properties of hydrogels, weakened stimuli responsiveness, etc., and achieves excellent mechanical properties, excellent electrical conductivity, and unique thermal properties. The effect of responsive performance

Active Publication Date: 2018-10-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method of filling usually leads to weakened mechanical properties of the hydrogel, and due to the strong interaction between the filler and the polymer matrix, the movement of the polymer chains is restricted and the stimuli responsiveness is weakened.

Method used

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  • Cellulose-based temperature-sensitive conductive hydrogel, and preparation method and application thereof

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Embodiment 1

[0029] This embodiment provides a cellulose-based temperature-sensitive conductive hydrogel, the preparation method comprising the following steps:

[0030] (1) Weigh 15g of cellulose solution, add 1mL of 2wt% guar gum solution and 1mL of epichlorohydrin, stir at 30°C for 30 minutes, and then heat at 60°C for 30 minutes to obtain a cellulose-based hydrogel. Soak the cellulose-based hydrogel in excess glacial acetic acid for 12 hours, take out the above-mentioned cellulose-based hydrogel and soak it in a In the aqueous solution, the quality of NIPAAm, BIS and water in this aqueous solution is 0.10g, 0.006g and 4g respectively, pass through inert gas for 30 minutes, stand for 5 hours, add 0.12g of ammonium persulfate (APS) and continue to pass through nitrogen 10 minutes, react at 50°C for 8 hours. The gel formed by cross-linking was taken out, placed in a dialysis bag, immersed in deionized water, changed every 12 hours, and dialyzed for 6 days to remove impurity ions.

[003...

Embodiment 2

[0033] This embodiment provides a cellulose-based temperature-sensitive conductive hydrogel, the preparation method comprising the following steps:

[0034](1) Weigh 15g of cellulose solution, add 1mL of 2wt% guar gum solution and 1mL of epichlorohydrin, stir at 30°C for 30 minutes, and then heat at 60°C for 30 minutes to obtain a cellulose-based hydrogel. Soak the cellulose-based hydrogel in excess glacial acetic acid for 12 hours, take out the above-mentioned cellulose-based hydrogel and soak it in a In the aqueous solution, the quality of NIPAAm, BIS and water in this aqueous solution is 0.10g, 0.008g and 4g respectively, pass through inert gas for 30 minutes, stand for 5 hours, add 0.12g of ammonium persulfate (APS) and continue to pass through nitrogen 10 minutes, react at 50°C for 8 hours. The gel formed by cross-linking was taken out, placed in a dialysis bag, immersed in deionized water, changed every 12 hours, and dialyzed for 6 days to remove impurity ions.

[0035...

Embodiment 3

[0037] This embodiment provides a cellulose-based temperature-sensitive conductive hydrogel, the preparation method comprising the following steps:

[0038] (1) Weigh 15g of cellulose solution, add 1mL of 2wt% guar gum solution and 1mL of epichlorohydrin, stir at 30°C for 30 minutes, and then heat at 60°C for 30 minutes to obtain a cellulose-based hydrogel. Soak the cellulose-based hydrogel in excess glacial acetic acid for 12 hours, take out the above-mentioned cellulose-based hydrogel and soak it in a In the aqueous solution, the quality of NIPAAm, BIS and water in this aqueous solution is 0.10g, 0.008g and 4g respectively, pass through inert gas for 30 minutes, stand for 5 hours, add 0.12g of ammonium persulfate (APS) and continue to pass through nitrogen 10 minutes, react at 50°C for 8 hours. The gel formed by cross-linking was taken out, placed in a dialysis bag, immersed in deionized water, changed every 12 hours, and dialyzed for 6 days to remove impurity ions.

[003...

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Abstract

The invention belongs to the technical field of preparation of fiber materials, and particularly relates to a cellulose-based temperature-sensitive conductive hydrogel, and a preparation method and application thereof. The preparation method comprises the following steps: (1) adding a guar gum solution and epichlorohydrin into a cellulose solution to obtain a cellulose-based hydrogel, then addingthe cellulose-based hydrogel into a water solution containing N-isopropylacrylamide and N,N-methylene bisacrylamide, adding a persulfate to carry out a cross-linking reaction, and finally, dialyzing the hydrogel formed by the cross-linking to remove impurity ions; and (2) soaking the dialyzed hydrogel in an aniline water solution, then adding a persulfate, and carrying out a reaction under ice bath to obtain the cellulose-based temperature-sensitive conductive hydrogel. The hydrogel provided by the invention not only has unique thermal response performance, but also is endowed with excellent conductive property and excellent mechanical property. The hydrogel can be widely used in the fields of conductive materials, intelligent response materials, temperature sensors and the like.

Description

technical field [0001] The invention belongs to the technical field of fiber material preparation, and in particular relates to a cellulose-based temperature-sensitive conductive hydrogel and a preparation method and application thereof. Background technique [0002] With the gradual depletion of non-renewable resources such as coal, oil, and natural gas, and the increasingly serious environmental "white pollution" problem, science and technology have tended to study renewable, environmentally friendly and sustainable functional materials. Cellulose is a renewable resource with a wide range of sources. Due to its biocompatibility and biodegradability, it has broad application prospects in the field of materials, and has attracted more and more domestic and foreign researchers' attention. After the cellulose dissolves, the molecular chain exposes more hydroxyl active groups. According to the characteristics of the active groups, designing and synthesizing functional hydrogels...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L1/02C08L5/14C08L79/02C08G73/02C08F291/08C08F220/54C08F222/38
CPCC08F251/00C08F251/02C08G73/0266C08J3/075C08J2301/02C08J2405/14C08J2479/02C08F220/54
Inventor 杨飞何伟健冯郁成汤吕桥李艳丽
Owner SOUTH CHINA UNIV OF TECH
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