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Force-induced responsive polymer with light-operated switch function

A light-controlled switch and polymer technology, applied in the field of force-responsive polymers, can solve problems such as difficulty in reuse, difficulty in intelligent response and regulation function, and weak regulation ability.

Pending Publication Date: 2020-07-07
厦门天策材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional DA structure has weak regulation ability, and the functional response to mechanical force is not rich enough, and it is difficult to reuse the force response, and it is difficult to give full play to its intelligent response and regulation function.

Method used

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  • Force-induced responsive polymer with light-operated switch function
  • Force-induced responsive polymer with light-operated switch function
  • Force-induced responsive polymer with light-operated switch function

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0284] In the preparation process of mechanoresponsive polymer foam materials, mechanical foaming method, physical foaming method and chemical foaming method are mainly used to foam the mechanoresponsive polymer.

[0285] Wherein, the mechanical foaming method is to introduce a large amount of air or other gases into the emulsion, suspension or solution of the polymer by means of strong stirring during the preparation of the mechano-responsive polymer to make it a uniform foam, It is then shaped into a foam by physical or chemical changes. In order to shorten the molding cycle, air can be introduced and emulsifiers or surfactants can be added.

[0286] Wherein, the physical foaming method is to use physical principles to realize the foaming of the polymer during the preparation of the mechanoresponsive polymer, which includes but not limited to the following methods: (1) inert gas foaming method, That is, under pressure, the inert gas is pressed into the molten polymer or pas...

Embodiment 1

[0302]

[0303] Weigh 1.8g of compound (a) and dissolve it in 10ml of toluene solvent, add 0.96g of N-(2-hydroxyethyl)maleimide, stir and react at 90°C for 24h, wash with ethyl acetate and deionized water Compound (b) was obtained after purification.

[0304] Add a certain amount of toluene solvent into a dry and clean reaction bottle, seal it, use argon gas to deoxygenate for 1 hour, add 0.2 mol of compound (b) and 0.2 mol of polyethylene glycol 400 into it and stir to dissolve, then add 2 ml of three Ethylamine was mixed evenly, and 0.4 mol of suberoyl chloride was added dropwise to continue stirring and mixing for 4 hours. After the reaction is finished, the polyester-based polymer is purified by drying under reduced pressure to remove the solvent. Dissolve a small amount of polymer in toluene and prepare a 10 mg / ml solution. Different mechanical response properties can be obtained by ultrasound under UV locking and visible light unlocking; under the irradiation of visi...

Embodiment 2

[0306]

[0307] Using compound (a) and N-(2-hydroxyethyl)maleimide as raw materials, they were dissolved in toluene solvent, heated to 80° C. and stirred for 24 hours to prepare dihydroxy compound (b).

[0308] Add a certain amount of toluene solvent into a dry and clean reaction bottle, seal it, use argon gas to deoxygenate for 1 hour, add 0.2mol of dihydroxy compound (b) and 0.2mol of polycaprolactone glycol into it, stir and dissolve , add 2ml of triethylamine and mix evenly, dropwise add 0.4mol of terephthaloyl dichloride and continue to stir and mix for 4 hours. After the reaction, remove the solvent by drying under reduced pressure to obtain a polyester product. Dissolve a small amount of polymer in toluene and make a solution of 10 mg / ml. Different mechanoresponsive properties can be obtained by ultrasound under UV locking and visible light unlocking; under visible light irradiation, the polymer undergoes a reverse DA reaction, followed by The polymer can be recovere...

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Abstract

The invention discloses a force-induced responsive polymer with a light-operated switch function. A polymer chain skeleton of the force-induced responsive polymer contains a force-sensitive group which has the light-operated switch function and contains Diels-Alder force-sensitive elements; under a specific illumination condition, the force-sensitive group in the force-induced responsive polymer is subjected to force-induced chemical changes under the action of mechanical force, so that force-induced response is realized. By introducing the force-sensitive group into the force-responsive polymer, a force-responsive polymer material which is controllable, diversified in performance and rich in structure can be prepared. The force-induced responsive polymer can be widely applied as a polymerstructural member with a force-induced response function, a functional coating, a photoelectric device material, a mechanical probe material, a force sensor, an intelligent response material, a shapememory material and the like.

Description

technical field [0001] The invention relates to the field of intelligent materials, in particular to a mechanoresponsive polymer with the function of a light-controlled switch. Background technique [0002] Polymer mechanochemistry is an interdisciplinary subject based on polymer chemistry and mechanics, which mainly studies the changes of physical and chemical properties of polymers under the action of mechanical force. The mechano-responsive polymer is to embed the force-sensitive group into the polymer skeleton in the form of covalent bonds. Different from the currently widely used excitation methods such as light, heat, and electricity, the mechanical force has directionality: under the action of mechanical force, the polymer chain can be used as a stress transmission medium, so that the mechanical energy is transmitted from both ends of the polymer chain to the center. . Compared with the usual chemical reaction process, the chemical reaction induced by mechanical for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24
CPCC08J3/243
Inventor 不公告发明人
Owner 厦门天策材料科技有限公司
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