Self-repairing transparent polyurethane composite material with electrical conductivity and thermal reversibility and preparation method thereof

A composite material, reversible technology, applied in the direction of coating, can solve the problem that there is no self-healing polyurethane composite material research or report.

Inactive Publication Date: 2020-10-27
JINLING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no research or report on the application of self-healing polyurethane composites in flexible electronic devices

Method used

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  • Self-repairing transparent polyurethane composite material with electrical conductivity and thermal reversibility and preparation method thereof
  • Self-repairing transparent polyurethane composite material with electrical conductivity and thermal reversibility and preparation method thereof
  • Self-repairing transparent polyurethane composite material with electrical conductivity and thermal reversibility and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Add 0.7g MDI into 5mL DMF solvent, stir in a 40°C water bath for 5min, then add 3.5gPPG2000 dropwise, raise the temperature to 60°C and continue stirring for 10min. After cooling down to 0°C, add 0.2mL Fam dropwise, react in an ice-water bath for 20 minutes, return to room temperature, use furfurylamine to block the isocyanate, and continue the reaction for 20 minutes to form a polyurethane prepolymer (MPF) with furan ends;

[0039] Add 1g of BMI to MPF, raise the temperature to 50°C again, stir and react for 10h, then pour the synthetic product upside down into a polytetrafluoroethylene template, and process it in a vacuum oven at 50°C for 10h to obtain the product PU-DA .

Embodiment 2

[0041] Add 1g of MDI into 10mL of DMF solvent, stir in a water bath at 50°C for 10min, then add 4g of PPG2000 dropwise, raise the temperature to 70°C and continue stirring for 15min. After cooling down to 0°C, add 0.3mL Fam dropwise, react in an ice-water bath for 30 minutes, return to room temperature, use furfurylamine to block the isocyanate, and continue the reaction for 30 minutes to form a polyurethane prepolymer (MPF) with furan ends;

[0042] Add 2g of BMI to MPF, raise the temperature to 60°C again, stir and react for 12 hours, apply the diluted nano-silver wires evenly on the surface of the template by drop coating method, pour the synthesized product upside down into the polytetrafluoroethylene template, and cast it at 60°C After drying under vacuum for 12h, it is PU-DA / Ag.

[0043] Performance analysis was performed on the intermediate products in the preparation process in the above examples and the final product of the present invention.

[0044] figure 1 FTIR ...

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Abstract

The invention discloses a preparation method of a self-repairing transparent polyurethane composite material with electrical conductivity and thermal reversibility. The preparation method comprises the following steps: step 1, synthesizing a prepolymer (MPF) from furfurylamine (FAm) and 4, 4 '-diphenylmethane diisocyanate (MDI) through a one-step method, carrying out a reaction by using a dienophile, carrying out a DA reaction through an electron withdrawing effect, and carrying out tape casting in a template to obtain a self-repairing transparent polyurethane film (PU-DA) with thermal reversibility; and step 2, loading the nano silver wire onto a self-repairing transparent polyurethane film (PU-DA) with thermal reversibility through a charge adsorption effect so as to prepare the self-repairing transparent polyurethane film (PU-DA / Ag) with conductivity and thermal reversibility. The prepared composite material has the advantages of better light transmission, conductivity and the like,and has wide application in the field of flexible electronic devices.

Description

technical field [0001] The invention relates to the fields of polyurethane composite materials and flexible electronic devices, in particular to a self-repairing transparent polyurethane composite material with conductivity and thermal reversibility and a preparation method thereof. Background technique [0002] Due to its high strength, light weight and excellent mechanical processability, polymer materials are increasingly used in military aerospace, biomedical, microelectronics, transportation and other fields. However, during use, these materials are often exposed to the surrounding environment, subjected to temperature differences, ultraviolet rays, moisture, and external forces or combined damage, causing micro-cracks to age and crack. Once the material is cracked or damaged, its performance will be easily reduced or even disappeared. For this reason, researchers have begun to study a smart polymer material with self-healing ability. [0003] Polyurethane (PU for shor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/06C08J5/18C08G18/76C08G18/48C08G18/28C08G18/83C08L75/08
CPCC08J7/06C08J5/18C08G18/7671C08G18/4825C08G18/2865C08G18/833C08J2375/08
Inventor 郝凌云张小娟肖文柯王璐金荣泰傅庭鑫凌鑫楠潘禧凯茅云田耘小
Owner JINLING INST OF TECH
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