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Macromolecular material with water-response bidirectional-reversible shape memory function and preparation method therefor

A technology for polymer materials and memory materials, which is applied in the field of polymer materials with water-responsive two-way reversible shape memory function and the field of preparation thereof, can solve problems such as polymers without shape memory, and achieves simple and diverse preparation methods. Simple and easy to trigger effects

Pending Publication Date: 2019-12-03
LINYI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no shape memory polymer that can achieve water response (and does not require external force) to achieve two-way shape memory function

Method used

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  • Macromolecular material with water-response bidirectional-reversible shape memory function and preparation method therefor
  • Macromolecular material with water-response bidirectional-reversible shape memory function and preparation method therefor
  • Macromolecular material with water-response bidirectional-reversible shape memory function and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A polymer material with a water-responsive two-way reversible shape memory function, the raw materials of which are as follows:

[0060] a) polyethylene glycol diacrylate (PEGDA): Mw=8000, Alfa Aesar company;

[0061] b) n-butyl acrylate (BA): Aladdin Reagent (Shanghai) Co., Ltd.;

[0062] c) benzoin dimethyl ether, Sigma-Aldrich company;

[0063] Preparation:

[0064] Preparation by bulk polymerization: Weigh a certain amount of PEGDA and BA (0wt% ~ 60wt%), add benzoin dimethyl ether, the amount added is 0.4% of the total mass of the system, dissolve it at 70°C, stir evenly and pour Put it into a sealed glass abrasive tool, cure it under ultraviolet light for 30 minutes, and then further cure it at 90°C for 1 hour. A water-responsive two-way shape memory material with a reversible driving phase under constant external force is obtained.

[0065] When the BA content is 50wt%, the melting point of the material after cross-linking and curing is 45°C, and the enthalpy ...

Embodiment 2

[0067] A polymer material with a water-responsive two-way reversible shape memory function, the raw materials of which are as follows:

[0068] a) polyethylene glycol (PEG): Mw=2000, Sigma-Aldrich company

[0069] b) Hexamethylene diisocyanate (HDI): Sigma-Aldrich company;

[0070] c) Dibutyltin dilaurate (DBTDL): TCI Company;

[0071] d) Butanediol (BDO): TCI Company;

[0072] e) pentaerythritol: TCI company;

[0073] Preparation:

[0074] Preparation by bulk polymerization: Vacuum dry 3g PEG at 110°C for 2h, add three drops of catalyst DBTDL, 0.1gBDO and 0.1g pentaerythritol, stir evenly, add equistoichiometric HDI, react at 85°C for 2h, after the reaction is completed, react The solution was poured into a polytetrafluoroethylene mold, reacted at 80°C for 24 hours, and then dried at 80°C to obtain a reversible water-responsive two-way shape memory material under constant external force.

[0075] After testing, the melting point of the material is 41°C. When the constant...

Embodiment 3

[0077] A polymer material with a water-responsive two-way reversible shape memory function, the raw materials of which are as follows:

[0078] a) Polyethylene glycol diacrylate (PEGDA): Mw=4000, Alfa Aesar company;

[0079] b) tetrakis (3-mercaptopropionic acid) pentaerythritol ester, Sigma-Aldrich;

[0080] c) Triethylamine catalyst, Sinopharm Chemical Reagent Co., Ltd.

[0081] Preparation:

[0082] According to the molar ratio of PEGDA and tetrakis (3-mercaptopropionic acid) pentaerythritol ester is 2:1, make 40wt% dimethylformamide solution, mix well, add 1wt% triethylamine, pour into tetrafluoroethylene abrasive tool , cured at 80°C for 6h, and then dried in a vacuum oven at 80°C to remove residual DMF. The cured sample was removed from the mold to obtain a reversible water-responsive two-way shape memory material under constant external force.

[0083] After testing, the melting point of the material is 48°C. When the constant external force is 0.3MPa, T high and T...

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Abstract

The invention discloses a macromolecular material with a water-response bidirectional-reversible shape memory function and a preparation method therefor. According to the material, a hydrophilic crystalline material serves as a reversible drive phase of a bidirectional-reversible shape memory material; when the humidity of the material is improved, the hydrophilic crystalline material is dissolvedgradually, molecular chains curl up, and the material shrinks; when the humidity of the material is lowered, dissolved hydrophilic crystalline chain segments are subjected to oriented crystallizationalong an external force or internal force, and the material stretches; and the material can achieve reversible shape change under the condition of wet state and dry state circulating. The involved water-response bidirectional-reversible shape memory polymer is simple and diversified in preparation method, and different processing forms and shapes can be designed according to actual needs. Water serves as a stimulus for triggering shape change, so that the material has the characteristics that the source is wide, and the triggering mode is simple, convenient and safe; and the material has a relatively high potential application value in the fields of biomedical devices, textile materials, anti-counterfeiting materials, information storage, humidity driving systems, detecting devices and the like.

Description

technical field [0001] The invention belongs to the field of new functional materials, and relates to a polymer material with a water-responsive bidirectional reversible shape memory function and a preparation method thereof. Background technique [0002] The intelligence of materials has become the latest direction of the development of materials science, and it is one of the research hotspots in the frontier field of materials science today. As an important class of smart materials, smart polymer materials refer to a class of materials that can perceive physical or chemical stimuli in the external environment, and have corresponding mutations in some of their physical and chemical properties, so that they can judge and process them appropriately and can be executed by themselves. . It has gained rapid and in-depth development in the past ten years. Among them, the most representative intelligent polymer material is the shape memory polymer material, which has aroused gre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/18C08G18/66C08G18/48C08G18/32C08G75/045C08G18/42
CPCC08F283/065C08G18/3206C08G18/4018C08G18/4269C08G18/4833C08G18/6677C08G75/045
Inventor 李兴建
Owner LINYI UNIVERSITY
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