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Force-induced response dynamic polymer and application thereof

A polymer and polymer chain technology, applied in the field of force-responsive dynamic polymers, can solve the problems of single response effect, weak dynamic and self-healing ability, and difficulty in reflecting the control ability of the acting force.

Active Publication Date: 2020-04-21
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

[0005]In the existing mechanochemical research, the force-sensitive group is often in a common covalent bond system, and it is difficult to show a good ability to regulate the force. At the same time, the whole system The dynamic and self-healing ability of the polymer is weak, the response effect is single, and it is difficult to fully exert the mechanoresponse effect of the force-sensitive group. By introducing the force-sensitive group and the dynamic covalent bond into the polymer chain structure together, it can be prepared with Mechanoresponsive and dynamic reversible mechanoresponsive dynamic polymers can form a new type of intelligent polymer

Method used

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  • Force-induced response dynamic polymer and application thereof
  • Force-induced response dynamic polymer and application thereof
  • Force-induced response dynamic polymer and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[2098] In the preparation process of dynamic polymer foam materials, three methods of mechanical foaming, physical foaming and chemical foaming are mainly used to foam dynamic polymers.

[2099] Among them, the mechanical foaming method is to introduce a large amount of air or other gases into the emulsion, suspension or solution of the polymer with the help of strong stirring during the preparation of the dynamic polymer to make it a uniform foam, and then through physical Or chemical changes make it shape and become a foam material. In order to shorten the molding cycle, air can be introduced and emulsifiers or surfactants can be added.

[2100] Wherein, the physical foaming method is to use physical principles to realize the foaming of the polymer during the preparation of the dynamic polymer, which includes but not limited to the following methods: (1) inert gas foaming method, that is, after adding Press the inert gas into the molten polymer or pasty material under press...

Embodiment 1

[2133]

[2134] Weigh 20g of compound 2 into a 100ml round-bottomed flask, add 50mL of ethanol and 50mL of deionized water as a mixed solvent, and stir well; then add 16.2g of compound 3, set up a reflux device, and stir in an oil bath at 80°C for 12 hours; the reaction is complete Afterwards, the solvent was removed by rotary evaporation, and the obtained product was recrystallized in a mixed solvent of acetonitrile:water=7:3, filtered, and dried to obtain the spiropyrandiol compound (a).

[2135] Add 20g of hydroxyl-terminated polydimethylsiloxane and 2g of boric acid into a three-necked flask, raise the temperature to 80°C, add a small amount of triethylamine, and carry out polymerization reaction for 3 hours under stirring to form the first network.

[2136] Take 8g of hexamethylene diisocyanate and add it to another three-necked flask, vacuum dehydrate it at 120°C for 2 hours, add 12ml of DMF to dissolve and dilute after cooling down to 45°C, protect with argon, and the...

Embodiment 2

[2138]

[2139] Dissolve 8g of 4-hydroxybenzophenone in 20ml of DMF solvent, heat to 90°C, slowly add 7.5g of 2-bromoethanol dropwise using a dropping funnel, and then add 11g of anhydrous potassium carbonate as a catalyst, under argon atmosphere The reaction was stirred for 24h. After the reaction, the product was cooled and filtered to remove the solid catalyst, precipitated with deionized water, vacuum filtered and freeze-dried to obtain 4-(2-hydroxyethoxy)benzophenone. Get 4.8g prepared 4-(2-hydroxyethoxyl) benzophenone and dissolve in 20ml DMF solvent, then add 30ml isopropanol, drop two drops of acetic acid, after mixing uniformly, utilize 350nm ultraviolet light to irradiate 4 -6d, pour deionized water to obtain the crude product, and then use 1:1 petroleum ether-ethyl acetate as eluent to purify by silica gel column chromatography to obtain the hydroxyl compound (a).

[2140] Using equimolar amounts of 2-aminoethylaminoboronic acid and dopamine as raw materials and...

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Abstract

The invention discloses a force-induced response dynamic polymer. The polymer chain skeleton contains at least one force-sensitive group and at least one boron-containing dynamic covalent bond; wherein the polymer also optionally contains at least one supramolecular interaction; under the action of mechanical force, the force-sensitive group in the dynamic polymer is subjected to chemical and / or physical change to realize force-induced response. According to the dynamic polymer, the force-sensitive group with a force-induced response characteristic, the boron-containing dynamic covalent bondswith different dynamic properties and the optional supramolecular interaction are introduced, so that the force-induced response dynamic polymer material with a wide controllable range, a rich structure and various properties can be prepared. The force-induced response dynamic polymer can be widely applied as a functional coating with a force-induced response function, a self-repairing material, an energy storage device material, an energy absorbing material, a photoelectric device material, a mechanical probe and the like.

Description

technical field [0001] The invention relates to the field of smart materials, in particular to a mechanoresponsive dynamic polymer composed of mechanosensitive groups, boron-containing dynamic covalent bonds and optional supramolecular interactions. 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 c...

Claims

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Application Information

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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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