A multi-phase gel with multi-stable mechanics and shape memory properties and its preparation method

Abstract

The invention relates to a heterogeneous gel with multi-stable mechanics and shape memory properties and a preparation method thereof. The multiphase gel has a heterogeneous network structure, with water or ionic liquid gel network as the matrix, and oil gel particles with a particle size of 1-20 μm are uniformly dispersed inside the matrix; the oil gel particles include oil gel particles A glue network and an oil phase mixed solvent filled therein; the oil phase mixed solvent is selected from molecular formula C x h 2x+2 n-Alkanes or C x h 2x+ 2 A mixture of two or more types of n-alkanols in O, where 8≤x≤50; in the oil-phase mixed solvent, according to the ascending or descending order of carbon numbers on the molecular chain, each adjacent two n-alkanes or n-alkanols The difference in carbon number x is 6 or more, and the oil phase solvents are non-eutectic with each other. The multi-phase gel has mechanical multi-level regulation, shape memory performance, good elasticity, stability and conductivity; it has application prospects in mechanical engineering, soft robots and medical devices.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a multi-phase gel with multi-stable mechanics and shape memory properties and a preparation method thereof. Background technique [0002] With the development of materials science, some materials with excellent mechanical properties have played an indispensable role in various fields. However, these materials generally have single mechanical properties and cannot adapt to changing environments, thus limiting their applications. Mechanically tunable materials have two or more stable mechanical states, and when subjected to external stimuli, such as heat, light, solvents, etc., their mechanical properties change, thus showing good environmental adaptability. The current mechanically tunable materials are mainly based on shape memory materials, phase change materials, electromagnetic fluids and reversible cross-linked networks. However, most of these materials have t...

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Problems solved by technology

This wide temperature range leads to limited mechanical transformation and shape memory properties of the material, poor controllability, low sensitivity, and low transformation efficiency; the material is in the process of changing for a long time, which is not conducive to mechanical stability. In terms of shape memory, it is not conducive to the rapid recovery of the original shape

Moreover, the continuous phase of the material uses hydrogel. Due to the influence of the physical properties of water itself, the working temperature of the gel material is narrow, the stability is poor, and the selection of other components of the composite material also has a great impact. limits

Therefore, in important fields such as precision instruments and soft robots, it is difficult for this material to be really applied.

[0006] To sum up, although great progress has been made in the research of gels, most of their mechanical functions are relatively single. Therefore, the development of multifunctional ionic liquid gel materials with easy-to-adjust mechanical properties is of great significance for expanding their application fields.

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