Elastic conducting polymeric hydrogel, sponge, preparation method and application thereof

A conductive polymer, hydrogel technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problem of not realizing the preparation of elastic conductive organic sponge, and achieve excellent compression and resilience performance, low cost, simple and easy raw materials the effect

Active Publication Date: 2016-01-27
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the research on conductive sponges, the preparation of elastic conductive organic sponges has not been realized.

Method used

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  • Elastic conducting polymeric hydrogel, sponge, preparation method and application thereof
  • Elastic conducting polymeric hydrogel, sponge, preparation method and application thereof
  • Elastic conducting polymeric hydrogel, sponge, preparation method and application thereof

Examples

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preparation example Construction

[0075] Still taking a preparation method of an elastic polypyrrole hydrogel as an example, the method is to prepare a highly elastic conductive polymer hydrogel through stage-by-stage kinetic control, see figure 1 , the method may include the following steps:

[0076] a. Adding pyrrole, pyrrole dimer or pyrrole derivative to the mixed solvent of water and organic solvent, stirring evenly, configuring monomer solution A;

[0077] Wherein, the organic solvent may be selected from but not limited to ethanol, ethylene glycol, glycerol, acetone, butanone, acetonitrile, tetrahydrofuran, N,N-dimethylformamide, N,N-dimethylacetamide , dimethyl sulfoxide, etc. The volume ratio of water and organic solvent in the mixed solvent is preferably 1 / 10-10 / 1, more preferably 1 / 5-5 / 1.

[0078] b. Dissolving the oxidizing agent in the same mixed solvent as solution A, and configuring the homogeneous solution B of the oxidizing agent;

[0079] Wherein, if the unimolecular composite oxidant is...

Embodiment 1

[0098] Example 1 see again figure 1 , Add 2.24 mmol, 155 μL of pyrrole (Pyrrole) monomer into 1.5 mL of water-dimethyl sulfoxide (v / v1:5) mixed solution, mix well and place in ice-water bath for 30 min. At the same time, 1.12mmol, 0.281g manganese nitrate tetrahydrate (Mn(NO 3 ) 3 4H 2 O) Dissolve in 1.5mL water-dimethylsulfoxide (v / v1:5) mixed solution, mix well and place in ice-water bath for 30min. Under strong magnetic stirring, the ferric nitrate solution was added to the pyrrole monomer solution, stirred evenly, transferred to a gel mold, and left to stand in an ice-water bath for about 2 hours to form a gel. Transfer it to a constant temperature water bath at 35°C and let it stand for 40 days. Take the obtained gel out of the reaction vessel, add 0.1mol / L hydrochloric acid aqueous solution to the wet gel, pour out the hydrochloric acid aqueous solution after soaking for 3 hours, repeat 8 times, add deionized water to the wet gel, soak for 3 hours Finally, deioniz...

Embodiment 2

[0099] Example 2 see again figure 1 , Add 6.26mmol and 433μL of pyrrole (Pyrrole) monomer into 3mL water-ethanol (v / v3:1) mixed solution, mix well and place in ice-water bath for 10min. At the same time, 12.52mmol, 5.06g iron nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O) Dissolve in 3mL water-ethanol (v / v3:1) mixed solution, mix well and place in ice-water bath for 10min. Under strong magnetic stirring, the ferric nitrate solution was added to the pyrrole monomer solution, stirred evenly, and then transferred to a mold, and the reaction solution was allowed to stand in an ice-water bath for about 5 minutes to form a gel. It was transferred to a constant temperature water bath at 50°C and left to stand for 15 days. Take the obtained gel out of the mold, add 0.05mol / L hydrochloric acid aqueous solution to the wet gel, pour out the hydrochloric acid aqueous solution after soaking for 4 hours, repeat 6 times, add deionized water to the wet gel, soak for 4 hours Pour out the deio...

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Abstract

The invention discloses conducting polymeric hydrogel, sponge, a preparation method and an application thereof. Eigenstate conducting high-molecular polymer is used as a three-dimensional framework of the hydrogel, and the hydrogel is an organic conducting material having good mechanical strength and compression elasticity. The hydrogel can be obtained through step-by-step oxidative coupling polymerization on pyrroles and pyrrole derivatives by using an oxidizing agent and long-term secondary growth. Content of the conducting high-molecular polymer in the hydrogel is 1.5-21.5 wt%; maximum compression ratio can reach 90%; the hydrogel recovers to normal within 10 s to 5 min after compression; conductivity is 0.001-10 S/m; and the hydrogel has shape memory characteristics, and compression deformation recovery quantity is directly related to solvent volume. The sponge is obtained by drying the hydrogel. Mechanical strength, elasticity and conductivity of gel can be greatly maintained. With increasing of compression ratio, resistance value of the sponge is gradually reduced by 0-10%. The hydrogel and sponge of the invention can be widely applied in fields of dye adsorption, stress sensing, electrical switch and the like.

Description

technical field [0001] The invention relates to a hydrogel and a sponge material, in particular to an elastic conductive polymer hydrogel, a sponge and a preparation method and application thereof. Background technique [0002] Gels have been successfully used in every aspect of daily life. Conductive gels can be prepared by introducing conductive elements such as conductive polymers and carbon black particles into hydrogels by physical blending, chemical grafting, or forming interpenetrating networks. Drug release and other aspects have good application prospects. However, the existence of continuous non-conductive components in this type of traditional conductive gel limits the performance of the conductive properties. At the same time, volume changes such as swelling or shrinkage inevitably occur during the application of the conductive gel, resulting in the conductive The separation of the skeleton affects the conductive stability of the gel. Intrinsically conductive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/06C08J3/075C08J9/28C08L79/04B01J20/30B01J20/26
Inventor 张学同何伟娜
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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