A PDMS-based elastic film that can quickly self-heal without external stimulation and its preparation method

A technology of elastic film and external stimulation, applied in the field of functional film, to achieve the effect of high repair efficiency, time reduction and repair efficiency improvement

Active Publication Date: 2020-11-20
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a fast self-healing elastic film based on PDMS without external stimulation and its preparation method, which solves the technical problem that traditional self-healing films need external stimulation to achieve repair

Method used

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  • A PDMS-based elastic film that can quickly self-heal without external stimulation and its preparation method
  • A PDMS-based elastic film that can quickly self-heal without external stimulation and its preparation method

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preparation example Construction

[0039] A method for preparing a fast self-healing elastic film based on PDMS without external stimulation comprises the following steps:

[0040] Step 0: surface treatment of the rigid glass substrate;

[0041]Rigid glass pretreatment: The rigid glass substrate was ultrasonically cleaned in deionized water, acetone and absolute ethanol for 15-30 min, and then dried at 60-80°C for 30-40 min; hydrophilic treatment: the cleaned The final rigid glass substrate is ultrasonically cleaned in a mixture of hydrogen peroxide and concentrated sulfuric acid with a volume ratio of 7:1-7:3 for 30-45 min, and then dried at a temperature of 60-80°C for 30-40 min; Put the hydrophilic treated glass substrate in a beaker, add 2-5 ml of trimethylchlorosilane (TMCS) dropwise and seal the beaker, put it in a constant temperature water bath and heat it in a water bath at 60-80°C 45-60 min.

[0042] Step 1: preparing a chain polymer material by using hydroxyl or amino-terminated polydimethylsiloxan...

specific Embodiment 1

[0047] A fast self-healing elastic film based on PDMS without external stimulation: including 1.4 parts by weight of hydroxyl-terminated polydimethylsiloxane; 4 parts by weight of polyacrylic acid (PAA); 1 part by weight of polyethyleneimine; also including 0.08 N,N'-dicyclohexylcarbodiimide (DCC) in parts by weight, 4-dimethylaminopyridine (DMAP) in 0.02 parts by weight, polydimethylsiloxane (PDMS) in 2 parts by weight, 0.2 parts by weight part polydimethylsiloxane (PDMS) curing agent.

[0048] A method for preparing a fast self-healing elastic film based on PDMS without external stimulation comprises the following steps:

[0049] Step 0: Cleaning, hydrophilic and hydrophobic treatment on the surface of the rigid glass substrate

[0050] Rigid glass pretreatment: The rigid glass substrate was ultrasonically cleaned in deionized water, acetone and absolute ethanol for 30 minutes, and dried in a blast drying oven at 60°C for 30 minutes;

[0051] Hydrophilic treatment: Ultraso...

specific Embodiment 2

[0063] A fast self-healing elastic film based on PDMS without external stimulation: including 4 parts by weight of hydroxyl-terminated polydimethylsiloxane; 4 parts by weight of polyacrylic acid (PAA); 1 part by weight of polyethyleneimine; also including 0.12 Parts by weight of N,N'-dicyclohexylcarbodiimide (DCC), 0.04 parts by weight of 4-dimethylaminopyridine (DMAP), 2 parts by weight of polydimethylsiloxane (PDMS), 0.2 parts by weight part polydimethylsiloxane (PDMS) curing agent.

[0064] A method for preparing a fast self-healing elastic film based on PDMS without external stimulation comprises the following steps:

[0065] Step 0: Cleaning, hydrophilic and hydrophobic treatment on the surface of the rigid glass substrate

[0066] Rigid glass pretreatment: The rigid glass substrate was ultrasonically cleaned in deionized water, acetone and absolute ethanol for 30 minutes, and dried in a blast drying oven at 80°C for 30 minutes;

[0067] Hydrophilic treatment: Ultrasoni...

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Abstract

The invention discloses a fast self-healing elastic film based on PDMS without external stimulation and a preparation method thereof, wherein the elastic film comprises 1-5 parts by weight of hydroxyl or amino-terminated polydimethylsiloxane, 4-5 parts by weight of Acrylic polymers containing carboxyl or ester groups, 1-2 weight parts of polymers containing hydroxyl or amino groups; the preparation method includes the preparation of chain polymer materials and the preparation of self-repairing elastic films with polymer network structures; self-repairing elastic films It is a polymer material based on hydrogen bonds, which can quickly repair the damage in a short time at room temperature after external damage is felt, without external stimulation.

Description

technical field [0001] The invention relates to the technical field of functional thin films, in particular to a PDMS-based fast self-healing elastic thin film without external stimulation and a preparation method thereof. Background technique [0002] In recent years, with the development of materials science, the properties of traditional materials, polymers and structural composites have been continuously improved and optimized, and applied in different industries. Among them, thin film materials have important application prospects in the fields of chemical separation, optical devices, chemical sensors and biological research. However, these thin film materials are easily affected by mechanical, chemical, ultraviolet radiation, heat and other factors, causing these materials to be damaged in unpredictable structures, such as microcracks, cracks and fractures, which seriously affect the function of the thin film material and reduce the The service life and stability of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L87/00C08L79/02C08L83/04C08K5/3432C08G81/02C08J5/18
CPCC08G81/024C08J5/18C08J2387/00C08J2479/02C08L87/00C08L2203/16C08L2205/03C08L79/02C08L83/04C08K5/3432
Inventor 太惠玲姚玉锦王东升袁震蒋亚东谢光忠杜晓松
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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