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Shape memory polymer with coumarin-containing polycaprolactone as soft segment and preparation method thereof

A technology of memory polymer and polycaprolactone, which is applied in the field of shape memory polymer and its preparation, to achieve the effect of good ultraviolet light response or thermal response and good shape memory function

Active Publication Date: 2019-07-02
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a new photoresponsive switch on the basis of several photoresponsive switches that have been studied, and at the same time provide a kind of Preparation method of shape memory polymer containing polycaprolactone with coumarin as soft segment

Method used

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  • Shape memory polymer with coumarin-containing polycaprolactone as soft segment and preparation method thereof
  • Shape memory polymer with coumarin-containing polycaprolactone as soft segment and preparation method thereof
  • Shape memory polymer with coumarin-containing polycaprolactone as soft segment and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042]Shape memory polymer 1 containing polycaprolactone with coumarin as soft segment was prepared as follows:

[0043] Step 1: In a glove box under a nitrogen atmosphere, 3.078 g of caprolactone and 0.1728 g of bromocaprolactone were added to 28 mL of anhydrous toluene, and then 0.1501 g of diphenyl phosphate and 18.6 mg of ethylene glycol were added. After 16 hours of reaction, the reaction was terminated with an appropriate amount of benzoic acid, then precipitated three times in frozen methanol, and finally dried in a vacuum oven.

[0044] Step 2: Add 3.08 g of polybromocaprolactone-polycaprolactone copolymer obtained in step 1 to 15 mL of N,N-dimethylformamide, and add 0.1742 g of sodium azide to the solution and react at 50°C for 8 hours. The mixed solution was concentrated to less than 5 mL, then toluene was added, and the polyazidocaprolactone-polycaprolactone copolymer was separated by centrifugation.

[0045] Step 3: Add 2.8145 g polyazidocaprolactone-polycaprolac...

Embodiment 2

[0051] Shape memory polymer 2 containing polycaprolactone with coumarin as the soft segment was prepared as follows:

[0052] Dissolve 0.878 g of polycaprolactone diol containing coumarin obtained in Step 3 of Example 1 in 2.5 mL of N,N-dimethylformamide, add 0.0932 g of 1,6-hexamethylene diisocyanate and 0.0292 g Ethylene glycol was reacted at 80°C for 6 hours, then diluted with 7.5 mL of N,N-dimethylformamide, poured into a polytetrafluoroethylene mold and dried to obtain shape memory polymer 2.

Embodiment 3

[0054] Shape memory polymer 3 containing polycaprolactone with coumarin as soft segment was prepared by the following method:

[0055] Step 1: Add 2.736 g of caprolactone and 4.608 g of bromocaprolactone to 40 mL of anhydrous toluene in a nitrogen atmosphere glove box, then add 0.6672 g of diphenyl phosphate and 82.8 mg of ethylene glycol . After 16 hours of reaction, the reaction was terminated with an appropriate amount of benzoic acid, then precipitated three times in frozen methanol, and finally dried in a vacuum oven.

[0056] Step 2: Add 4.49 g of the polybromocaprolactone-polycaprolactone copolymer obtained in step 1 to 20 mL of N,N-dimethylformamide, and add 1.88 g of sodium azide to the solution and react at 50°C for 8 hours. The mixed solution was concentrated to less than 5 mL, then toluene was added, and the polyazidocaprolactone-polycaprolactone copolymer was separated by centrifugation.

[0057] Step 3: Add 3.228 g of polyazidocaprolactone-polycaprolactone cop...

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Abstract

The invention discloses a shape memory polymer with coumarin-containing polycaprolactone as a soft segment and a preparation method thereof. The soft segment of the shape memory polymer is coumarin-containing polycaprolactone. The chemical structural formula is as shown in the formula (I). The preparation method of the shape memory polymer comprises the following steps: brominated caprolactone andcaprolactone are used as comonomers and small molecule diol is used as an initiator to prepare a brominated caprolactone-polycaprolactone copolymer, and then after azidation and click reaction for post-modification, coumarin-containing polycaprolactone is prepared; the coumarin-containing polycaprolactone and polylactide or small molecule diol are coupled by using small molecular diisocyanate soas to obtain the shape memory polymer with the coumarin-containing polycaprolactone as the soft segment. The prepared shape memory polymer has good shape memory functions of ultraviolet response and thermal response.

Description

technical field [0001] The invention relates to the field of intelligent polymer materials, more specifically, to a shape-memory polymer with coumarin-containing polycaprolactone as a soft segment and a preparation method thereof. The polymer has ultraviolet light response and thermal response shape memory properties. Background technique [0002] Shape memory polymers are a class of smart polymer materials that can be fixed in one or more temporary shapes and can return to their original shape under external stimuli (such as heat, light, humidity, magnetism, etc.). At present, shape memory polymers have broad application prospects in the fields of nanomedicine, tissue engineering, aerospace and sensors. [0003] Traditional shape memory materials mostly use heat as a stimulus source, so there are many limitations in the application process. Light as a stimulus can solve the limitations of many traditional shape memory materials that use heat as a stimulus in the applicati...

Claims

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Application Information

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IPC IPC(8): C08G63/91C08G63/08C08G63/78
CPCC08G63/08C08G63/78C08G63/912
Inventor 黄华华吴咏卫陈永明
Owner SUN YAT SEN UNIV
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