High polymer material capable of hardening when meeting moisture as well as preparation method and application of high polymer material

Abstract

The invention provides a high polymer material capable of hardening when meeting moisture as well as a preparation method and application of the high polymer material. The high polymer material capable of hardening when meeting moisture comprises the following raw materials: a monomer, an ionic liquid, salt, a cross-linking agent and an initiator, wherein the monomer comprises benzyl methacrylate, the ionic liquid comprises imidazolium ionic liquid, and the salt comprises hygroscopic salt. The preparation method of the high polymer material capable of being hardened in the wet environment comprises the following steps: mixing the raw materials to obtain a precursor liquid, conducting degassing, conducting reacting, and conducting drying to obtain the high polymer material capable of hardening in the wet environment. The high polymer material can be applied to biomimetic design actuators, soft robots and wearable biomedical equipment. According to the high polymer material capable of hardening in the wet environment, when the humidity is increased to a specific range, the Young modulus of the high polymer material can be increased by 4 orders of magnitude, the volume is not obviously changed, and the soft and hard conversion process is highly reversible.

Description

technical field [0001] The present application relates to the field of new materials, in particular to a polymer material that hardens when exposed to moisture and its preparation method and application. Background technique [0002] In recent years, the demand for bionic technology in various fields has promoted the development of environmental stimulus-responsive polymer materials, and actuators, soft robots and wearable biomedical devices based on bionic designs have emerged in an endless stream. Such stimuli usually include temperature, humidity, pH value, pressure, light, and magnetic field. Among them, humidity (water) has received extensive attention and research because of its wide source, greenness, and low energy consumption. Traditional humidity-responsive materials (such as hydrophilic polymer materials) usually exhibit reduced hardness and reduced strength due to the plasticization of water in high-humidity environments, which greatly limits their use in high-hu...

AI Technical Summary

Problems solved by technology

Traditional humidity-responsive materials (such as hydrophilic polymer materials) usually exhibit reduced hardness and reduced strength due to the plasticization of water in high-humidity environments, which greatly limits their use in high-humidity or even water-based environments. use in

[0003] The development of polymer materials with wet hardening will be beneficial to the selection and application of smart materials that expand the humidity response, but it is also extremely challenging

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