Intelligent aerogel with dual responses and adjustable response behaviors and preparation method thereof

An adjustable, double-response technology, applied in the field of functional materials, can solve problems such as unfavorable commercial production applications, high production costs, and complicated processes, and achieve broad industrial application prospects, easy mass production, and convenient operation.

Inactive Publication Date: 2016-08-24
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It was recently reported ("Nano Lett. 2013, 13, 2826 − 2830") that a composite gel of reduced graphene oxide and elastin was prepared through anisotropic structural design, which can be controlled by near-infrared light-controlled gels. deformation, but the preparation of reduced graphene oxide is relatively complicated, the cost of raw materials used is high and the process is complicated, which is not conducive to large-scale commercial production and application
In 2014, it was also reported in the journal "Micro-Nano" that a multi-response smart hydrogel was prepared by combining iron ferric oxide nanoparticles with temperature-sensitive polymers (Small 2014, 10, 2796–2800), ...

Method used

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  • Intelligent aerogel with dual responses and adjustable response behaviors and preparation method thereof
  • Intelligent aerogel with dual responses and adjustable response behaviors and preparation method thereof
  • Intelligent aerogel with dual responses and adjustable response behaviors and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Disperse 1 g of molybdenum disulfide powder and 5 g of carboxylated chitosan powder in 250 mL of water, sonicate for 8 h, and collect the supernatant by centrifuging the aqueous solution after sonication to obtain non-covalently modified molybdenum carboxylated chitosan. Aqueous solution of nanosheets of molybdenum sulfide. Take 5 mL of the prepared nanosheet aqueous solution, add 1 g of N-isopropylacrylamide monomer, 0.3 g of dimethylacrylamide monomer, 0.2 g of lithium diatomaceous earth, and 0.005 g of cross-linking agent N,N- Methylbisacrylamide and 0.012 g initiator ammonium persulfate, 0.006 g tetramethylethylenediamine, mixed evenly, poured into a polytetrafluoroethylene mold, and reacted for 24 hours at room temperature under nitrogen protection to obtain transition metal disulfide A single-layer composite gel of compound nanosheets; then add 1.5 g dimethylacrylamide monomer, 0.1 g carboxylated chitosan, 0.2 g lithium diatomite, and 0.005 g cross-linking agent N...

Embodiment 2

[0031] Disperse 0.1 g of tungsten disulfide powder and 0.05 g of carboxylated chitosan powder in 250 mL of water, sonicate for 48 h, and collect the supernatant by centrifuging the ultrasonic solution to obtain non-covalently modified carboxylated chitosan. Aqueous solution of nanosheets of tungsten sulfide. Take 5 mL of the prepared nanosheet aqueous solution, add 0.06 g N-isopropylacrylamide monomer, 0.19 g dimethylacrylamide monomer, 0.025 g lithium diatomaceous earth, 0.0125 g cross-linking agent N,N- Methyl bisacrylamide and 0.00025 g initiator ammonium persulfate, 0.00025 g tetramethylethylenediamine, mixed evenly, poured into a polytetrafluoroethylene mold, and reacted for 1 hour at room temperature under nitrogen protection to obtain transition metal disulfide A single-layer composite gel of compound nanosheets; then add 0.25 g dimethylacrylamide monomer, 0.001 g carboxylated chitosan, 0.025 g lithium diatomaceous earth, and 0.0125 g cross-linking agent N,N-methylene t...

Embodiment 3

[0033] Disperse 0.5 g of molybdenum diselenide powder and 2.5 g of carboxylated chitosan powder in 250 mL of water, sonicate for 10 h, and centrifuge the ultrasonic solution to collect the supernatant to obtain non-covalently modified carboxylated chitosan Aqueous solution of nanosheets of molybdenum diselenide. Take 5 mL of the prepared nanosheet aqueous solution, add 0.5 g oligoethylene glycol methyl ether methacrylate monomer, 0.5 g dimethylacrylamide monomer, 0.02 g lithium diatomaceous earth, 0.3 g crosslinking agent N , N-methylenebisacrylamide and 0.01 g of initiator ammonium persulfate, 0.001 g of tetramethylethylenediamine, mixed evenly, poured into a polytetrafluoroethylene mold, and reacted for 24 hours at room temperature under nitrogen protection to obtain Single-layer composite gel of transition metal dichalcogenide nanosheets; then add 1 g dimethylacrylamide monomer, 0.05 g carboxylated chitosan, 0.02 g lithium diatomaceous earth, 0.3 g crosslinker N, N-methyle...

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Abstract

The invention belongs to the technical field of functional materials and particularly relates to intelligent aerogel with dual responses and adjustable response behaviors and a preparation method thereof. Transition metal disulfide compound powder is ultrasonically stripped through a natural polymer water phase, a nanosheet layer of a polymer non-covalent bond modified transition metal disulfide compound is obtained, temperature-sensitive monomers and other comonomers and crosslinking agents are added to further prepare the composite aerogel of the disulfide compound nanosheet layer. The composite aerogel has excellent mechanical performance and has dual response characteristics of the far infrared response and the temperature response, and the response behaviors can be customized and adjusted. The related raw materials are natural polymers and other non-toxic and harmless reagents, water serves as an adopted solvent, the preparation process is environmentally friendly and free of pollution, operation is easy and convenient, the production cost is low, the intelligent aerogel is expected to be industrially produced on a large scale, and the prepared intelligent aerogel has multiple functions and has potential for large-scale preparation and wide commercial application prospects.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to an intelligent hydrogel with double responses and adjustable response behavior and a preparation method thereof. Background technique [0002] In recent years, due to their unique response and feedback functions, smart materials are closely related to bionics and information, and have attracted great attention from governments around the world and scientists from various disciplines. Through molecular design and compounding of various materials, people can make materials have advanced functions endowed by biology: such as self-repair ability, recognition and identification ability, stimulus response and environmental strain ability, etc. In the field of smart materials currently under development, the smart polymer hydrogel materials, because of their high water content, often have good compatibility with the human environment, have aroused the interest o...

Claims

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Application Information

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IPC IPC(8): C08F220/54C08F222/38C08F251/00C08F283/06C08K9/08C08K3/30C08K3/34
CPCC08F220/54C08F251/00C08F283/065C08K3/30C08K3/34C08K9/08C08K2003/3009C08K2201/011C08F222/385
Inventor 雷周玥朱文成冯凯武培怡
Owner FUDAN UNIV
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