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

A multi-stable and mechanical technology, applied in the field of materials, can solve the problems of limited mechanical transformation and shape memory performance, unfavorable rapid recovery of original shape, and difficult application of this material, achieving excellent multi-level regulation and controllability Effects of enhanced shape memory and sensitivity, improved conductivity

Active Publication Date: 2021-10-26
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Room temperature stable heterogeneous ionic liquid gel with mechanically tunable and shape memory properties and its preparation method:

[0061] 1) Add 0.3g of 1-butyl-3-methylimidazolium hexafluorophosphate, 0.2g of N,N-dimethylacrylamide (1-butyl-3-methylimidazolium hexafluorophosphate and N,N - The mass ratio of dimethylacrylamide is 1.5:1), 3 mg of ethylene glycol dimethacrylate (accounting for 1 / 100 of the mass of 1-butyl-3-methylimidazolium hexafluorophosphate) and 2,2 - 0.3 mg of diethoxyacetophenone (accounting for 1 / 10000 of the mass of 1-butyl-3-methylimidazolium hexafluorophosphate) is mixed, adding 2 mg of 5% sodium lauryl sulfate aqueous solution , to obtain the mixed solution of the ionic liquid phase after fully mixing;

[0062] 2) Hexadecane 0.29g, hexadecane 0.29g (hexadecane and hexadecane accounted for 50% respectively), stearyl methacrylate 0.29g, ethylene glycol dimethacrylate 2.9mg ( 1 / 100 of the mass of octadecyl methacrylate) and 1 mg of 2,2-d...

Embodiment 2

[0066] Multiphase hydrogel with mechanically tunable and shape memory properties and preparation method thereof:

[0067] 1) Mix 0.4g of water, 0.1g of N,N-dimethylacrylamide (the mass ratio of water to N,N-dimethylacrylamide is 4:1), 32mg of XLS-type clay tablets (accounting for 8% of the water quality). / 100) and 1 mg of 2,2-diethoxyacetophenone (accounting for 2.5 / 1000 of the water quality) are mixed, and the water phase mixed solution is obtained after fully mixing;

[0068] 2) Add 0.22g of hexadecane, 0.22g of octadecane, 0.22g of hexadecaneol (33% of hexadecane, octadecane and hexadecyl alcohol), 0.21g of lauryl methacrylate , 1 mg of ethylene glycol dimethacrylate (accounting for 5 / 1000 of the mass of lauryl methacrylate) and 1 mg of 2,2-diethoxyacetophenone (accounting for 5 / 1000 of the mass of lauryl methacrylate) Mix and heat in a water bath at a temperature of about 80°C, mix well to obtain an oil phase mixed solution;

[0069] 3) Add the solution prepared in step...

Embodiment 3

[0072] Room temperature stable heterogeneous ionic liquid gel with mechanically tunable and shape memory properties and its preparation method:

[0073] 1) Add 0.45g of 1-butyl-3-methylimidazolium methanesulfonate and 0.05g of acrylic acid (the mass ratio of 1-butyl-3-methylimidazolium methanesulfonate to acrylic acid is 9:1) , 2.25mg of ethylene glycol diethylacrylate (accounting for 5 / 1000 of the mass of 1-butyl-3-methylimidazolium methanesulfonate) and 1mg of 2,2-diethoxyacetophenone (accounting for 1 -2.2 / 1000 of butyl-3-methylimidazolium methanesulfonate quality) mixes, obtains the mixed solution of ionic liquid phase after fully mixing;

[0074]2) Add 0.17g of hexadecane, 0.19g of octadecane, 0.18g of hexadecane, and 0.17g of tetratetradecane (respectively 19.1%, 21.3%, 20.2%, 19.1%), stearyl methacrylate 0.18g, ethylene glycol dimethacrylate 0.9mg (accounting for 5 / 1000 of the mass of stearyl methacrylate) and 2,2 - 0.1 mg of diethoxyacetophenone (accounting for 5 / 100...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F220/54C08F222/14C08F2/48C08F2/26C08F2/30
CPCC08F2/26C08F2/30C08F2/48C08F220/18
Inventor 刘明杰禚淑云
Owner BEIHANG UNIV
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