A smart hydrogel with dual response and adjustable response behavior and its preparation method

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...

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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), which can realize remote control coagulation. However, the response behavior of smart hydrogels is generally relatively simple, and it is difficult to achieve more complex gel motion behaviors.

In addition, photothermal responsive agents such as gold nanoparticles, graphene, carbon nanotubes, ferric oxide nanoparticles, etc. required in many light-controlled smart hydrogel materials have complex preparation processes, high production costs, and biological Compatibility is still controversial, which is not conducive to commercial production and application, and the mechanical properties of the polymer hydrogel network are relatively poor, making it difficult to achieve complex motions.

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