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Phototropic shape memory polymer material and preparation and application methods thereof

A polymer material and memory polymer technology, applied in the field of flexible intelligent driving materials, can solve the problems of irreversibility and slow driving response, and achieve the effects of good phototropism, fast light driving and temperature driving deformation effect.

Active Publication Date: 2019-03-12
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a phototropic shape memory polymer material with both light response and temperature response, its preparation method and application, and its purpose is to use polycaprolactone di Alcohol is used as the initial reactant, the four-hydroxy functionalized hexaarylbiimidazole molecular switch is used as the dynamic cross-linking point, and the polyol is used as the fixed cross-linking point to undergo a cross-linking reaction with isocyanate to obtain a double cross-linked network structure. Millimeter-scale block polyurethane elastomer polymer material, which has good phototropism under ultraviolet light, and exhibits rapid deformation response and deformation memory under temperature-driven conditions, thereby solving the problem of existing technologies The smart light-driven materials need to be reduced to the micron level to show the driving effect, or the driving response is slow, irreversible and other technical problems

Method used

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  • Phototropic shape memory polymer material and preparation and application methods thereof
  • Phototropic shape memory polymer material and preparation and application methods thereof
  • Phototropic shape memory polymer material and preparation and application methods thereof

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preparation example Construction

[0051] The preparation method of intelligent polymer material of the present invention is characterized in that, comprises the steps:

[0052] (1) under light-shielding conditions and under the protection of an inert gas, mix and stir the organic solution of hexaarylbiimidazole molecules functionalized by tetrahydroxy, polycaprolactone diol and polyol after drying treatment, to obtain a mixed solution; Wherein the molar ratio of the four-hydroxy functionalized hexaaryl biimidazole, polycaprolactone diol and polyol is 1: (6-10): (1-5); the tetra-hydroxy functionalized hexaaryl biimidazole The organic solvent in the organic solution of imidazole molecules is tetrahydrofuran. The polyhydric alcohol is preferably a trihydric alcohol or a tetrahydric alcohol, more preferably a glycerol trihydric alcohol or pentaerythritol.

[0053] (2) Diisocyanate is mixed with the mixed solution described in step (1), and a crosslinking reaction occurs under the catalytic conditions of the catal...

Embodiment 1

[0073] In this embodiment, glycerin is used as fixed cross-linking point, and 2-Cl-4-diol-HABI molecular switch is used as dynamic cross-linking point to synthesize double cross-linked phototropic shape memory polymer material. The molecular structure of 2-Cl-4-diol-HABI is shown in the figure below.

[0074]

[0075]Weigh polycaprolactone diol (2.43g; 1.216mmol) into a round-bottomed flask, vacuum-dry at 70°C for about 1 hour, and cool to room temperature under the protection of nitrogen atmosphere. Then weigh 2-Cl-4-diol-HABI (128 mg; 0.152 mmol), dissolve it with 10 ml of anhydrous THF, mix it with polycaprolactone diol, and add catalyst DBTDL (8 mg, 0.013 mmol) and glycerin (28 mg; 0.304mmol) and stirred vigorously for half an hour; extract 0.25ml of HDI with a 1ml syringe and add it to the above mixed solution; vacuumize the mixed solution three to four times, stir for about ten minutes, then spin steam, completely remove THF, pour In pre-prepared molds. Put it into ...

Embodiment 2

[0078] Using PTMG as oligomer diol, 2-Cl-4-diol-HABI molecular switch and glycerol as crosslinking agent were used to synthesize double crosslinked phototropic shape memory polymer materials.

[0079] Weigh polycaprolactone diol (2.13g; 1.064mmol) into a round-bottomed flask, vacuum-dry at 70°C for about 1 hour, and cool to room temperature under the protection of nitrogen atmosphere. Then weigh 2-Cl-4-diol-HABI (128 mg; 0.152 mmol), dissolve it with 10 ml of anhydrous THF, mix it with polycaprolactone diol, and add catalyst DBTDL (8 mg, 0.013 mmol) and glycerin (42 mg; 0.456mmol) and stirred vigorously for half an hour; extract 0.25ml HDI with a 1ml syringe and add it to the above mixed solution; vacuumize the mixed solution three to four times, stir for about ten minutes, then spin steam, completely remove THF, pour In pre-prepared molds. Put it into a vacuum drying oven, react under vacuum conditions at 45°C for 24h, cool to room temperature and take it out. Finally, a cu...

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Abstract

The invention belongs to the technical field of flexible intelligent driving materials and particularly relates to a phototropic shape memory polymer material integrating photo-response and temperature response and preparation and application methods thereof. The phototropic shape memory polymer material is a polyurethane elastomer material in a double-crosslinked net structure and is prepared bytaking polycaprolactone diol as a chain extender, tetrahydroxy functionalized hexaaryl biimidazole molecular switches as dynamic crosslinking points and polyols as fixed crosslinking points to performcrosslinking reaction with isocyanate. The phototropic shape memory polymer material can present rapid deformation response under ultraviolet radiation and temperature driving to achieve good phototropic properties and is reversible in deformation under temperature driving, thereby solving the technical problem that intelligent photo-driven materials can achieve driving effects only when the thickness is reduced to a micron scale or are slow in driving response, irreversible or the like.

Description

technical field [0001] The invention belongs to the technical field of flexible intelligent driving materials, and more specifically relates to a phototropic shape memory polymer material, its preparation method and application. Background technique [0002] Phototropic shape-memory polymer materials belong to the category of intelligent driving materials. Intelligent driving materials are developed by imitating the ability of organisms to perceive changes in the surrounding environment (light, heat, PH value, etc.) and convert this change into their own movement. a study. Most of the movement in the biological world originates from the interaction between the organism's own organizational structure and the surrounding environment, which is the source of inspiration for material scientists to design and manufacture intelligent driving materials. Due to the good spatial accuracy of illumination, easy control, and easy operation, research on smart materials for optical drives...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/73C08G18/66C08G18/42C08G18/32
CPCC08G18/3206C08G18/3848C08G18/4277C08G18/6633C08G18/6644C08G18/73C08G2280/00
Inventor 朱明强向诗力李冲赵鹏举
Owner HUAZHONG UNIV OF SCI & TECH
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