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A Mechanoresponse Dynamic Polymer and Its Application

A technology of polymers and polymer chains, which is applied in the field of force-responsive dynamic polymers, can solve problems such as difficulty in synergistic orthogonal comprehensive performance, weak dynamic and self-repairing capabilities, and difficulty in reflecting the ability to control the force, achieving Good dynamic reversible characteristics, rich stress monitoring and stress response capabilities, providing the effect of balancing structure and mechanical strength

Active Publication Date: 2022-03-11
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 dynamics and self-healing ability of the whole system are weak, and the response effect is single, so it is difficult to use The mechanotropic response effect of the force-sensitive group has been fully utilized. By introducing the force-sensitive group together with different types of dynamic covalent bonds into the polymer chain structure, it overcomes the limited dynamic effect and dynamic regulation ability of a single dynamic covalent bond, which is difficult to achieve. Defects with comprehensive properties of synergistic orthogonality can prepare mechanosensitive dynamic polymers with mechanotropic responsiveness and synergistic orthogonal dynamics, forming a new type of intelligent polymer

Method used

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  • A Mechanoresponse Dynamic Polymer and Its Application
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  • A Mechanoresponse Dynamic Polymer and Its Application

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preparation example Construction

[2302] 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.

[2303] 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.

[2304] 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

[2342]

[2343] 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).

[2344] Using 1-aminoethylboronic acid and 3-aminopropyldimethylmethoxysilane as raw materials and tetrahydrofuran as a solvent, the molar ratio of the two is controlled to be 1:2, and the terminal amino compound is obtained by condensation reaction at 60°C (b).

[2345] Add 17.8g of 2-(ethylamino)ethanol and 100mL of chloroform into the reaction flask, place it in an ice bath, add 6mL of carbon disulfide and 12.7g of iodine, and react for 3 hours to obtain dihydroxythiuram disulfide (c)...

Embodiment 2

[2349]

[2350] 13g of compound 2 and 15g of compound 5 were refluxed in methanol solvent for 12h. After vacuuming to remove the solvent, the product was purified by silica gel column chromatography using ethyl acetate / n-hexane (1:2) as eluent, and then dissolved In 200mL CH 3 OH / CH 2 Cl 2 (1:1) mixed solution, add 31g K 2 CO 3 , and then the resulting solution was stirred for 5 h, then 1mol / L HCl aqueous solution was added to the reaction mixture, and then the product was extracted with ethyl acetate; the extract was washed with saturated NaCl aqueous solution and dried with anhydrous sodium sulfate; then the solvent was removed in vacuo, and then 1: 1. Ethyl acetate-n-hexane was used as an eluent, and the spirothiopyrandiol compound (a) was obtained by purifying by silica gel column chromatography.

[2351] Using 9,10-dibromoanthracene and trimethylsilylacetylene as raw materials, Pd(PPh 3 ) 2 Cl 2 , CuI, diisopropylamine as a catalyst, THF as a solvent, react unde...

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Abstract

The invention discloses a force-responsive dynamic polymer, which contains at least one force-sensitive group and at least one boron-free dynamic covalent bond on the polymer chain skeleton; it also optionally contains at least one boron-containing dynamic covalent bond; it also optionally contains at least one supramolecular interaction; under the action of mechanical force, the mechanosensitive group in the dynamic polymer undergoes chemical and / or physical changes to achieve mechanoresponse. The dynamic polymer can be prepared with a wide controllable range by introducing force-sensitive groups with mechanosensitive response characteristics, boron-free dynamic covalent bonds with different dynamics, optional boron-containing dynamic covalent bonds and supramolecular interactions. , rich structures, and diverse properties of force-responsive dynamic polymer materials. The mechanoresponsive dynamic polymer can be widely used as a functional coating with a mechanoresponse function, a self-healing material, an energy storage device material, an energy absorbing material, an optoelectronic device material, a mechanical probe, and the like.

Description

technical field [0001] The invention relates to the field of intelligent materials, in particular to a force-responsive dynamic polymer composed of force-sensitive groups, boron-free dynamic covalent bonds, optional 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. Mechano-responsive polymers embed force-sensitive groups into the polymer framework in the form of covalent bonds. Different from the currently widely used excitation methods such as light, heat, and electricity, mechanical forces are directional: in Under the action of mechanical force, the polymer chain can be used as a stress conduction medium, so that mechanical energy can be transmitted from both ends of the polymer chain to the cent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/50C08G18/32C08J9/32C08K3/32
CPCC08G18/6688C08G18/50C08G18/3275C08G18/3844C08G18/3893C08G18/3859C08J9/32C08K3/32C08K2003/323C08J2375/08
Inventor 不公告发明人
Owner 厦门天策材料科技有限公司
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