Preparation method and application of silicone rubber film with underwater self-healing capability and adhesiveness

A silicone rubber film, self-healing technology, applied in the direction of film/sheet, adhesive, adhesive type, etc. without carrier, can solve the problems of non-existence of self-healing, limited application, etc., and achieve extended service life and excellent mechanical properties , the effect of high adhesion strength

Active Publication Date: 2019-12-20
CHANGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, polydimethylsiloxane (PDMS) is an important adhesive widely used in many fields such as electronic assembly, automobile, aerospace, construction industry, etc. Commercially used PDMS does not have the function of self-healing, As the adhesive is destroyed, it needs to be bonded again with a new adhesive, which greatly limits its application

Method used

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  • Preparation method and application of silicone rubber film with underwater self-healing capability and adhesiveness
  • Preparation method and application of silicone rubber film with underwater self-healing capability and adhesiveness
  • Preparation method and application of silicone rubber film with underwater self-healing capability and adhesiveness

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Get 5g bis(3-aminopropyl) end-capped poly(dimethylsiloxane) (H 2 N-PDMS-NH 2 ), 0.23g of 4,4'-diaminodiphenyl disulfide (APD) and 0.25g of terephthalaldehyde (TPA) were dissolved in 25mL of chlorobenzene, and the solution was fully stirred at room temperature for 25min. After it was completely dissolved, the A chlorobenzene solution of 0.51 g of isophorone diisocyanate and 0.07 g of tris(2-aminoethyl)amine (both at a concentration of 0.1 g / ml) was slowly dropped into the above mixed solution respectively. After stirring at 60°C for 3 hours, pour the mixed solution into a polytetrafluoroethylene mold with a length of 10cm, a width of 10cm, and a height of 5mm, dry at 60°C for 12 hours, and then increase the temperature to 80°C for 12 hours to obtain the silicone rubber The thickness of the thin film (PDMS-1) is about 1 mm, and it is taken out and stored in a petri dish.

Embodiment 2

[0038] Get 7g bis(3-aminopropyl) end-capped poly(dimethylsiloxane) (H 2 N-PDMS-NH 2 ), 0.32g of 4,4'-diaminodiphenyl disulfide (APD) and 0.35g of terephthalaldehyde (TPA) were dissolved in 30mL of chlorobenzene, and the solution was fully stirred at room temperature for 20min. After it was completely dissolved, the 0.72 g of isophorone diisocyanate and 0.19 g of tris(2-aminoethyl)amine in chlorobenzene (concentrations both 0.1 g / ml) were slowly dropped into the above mixed solution respectively. After reacting at 60°C for 3 hours, pour the mixed solution into a polytetrafluoroethylene mold with a length of 10cm, a width of 10cm, and a height of 5mm, and dry it at 60°C for 24 hours. The thickness of the obtained silicone rubber film (PDMS-2) is about 1.5mm , Take it out and store it in a petri dish.

Embodiment 3

[0040] Get 5g bis(3-aminopropyl) end-capped poly(dimethylsiloxane) (H 2 N-PDMS-NH 2 ) and 0.23g of 4,4'-diaminodiphenyl disulfide (APD) were dissolved in 25mL of chlorobenzene, the solution was fully stirred at room temperature for 30min, after complete dissolution, 0.93g of isophorone diisocyanate and a chlorobenzene solution of 0.07 g of tris(2-aminoethyl)amine (concentration: 0.1 g / ml) were slowly dropped into the above mixed solution respectively. After reacting at 60°C for 2.5h, pour the mixed solution into a polytetrafluoroethylene mold with a length of 7cm, a width of 7cm, and a height of 5mm, and dry it at 70°C for 24 hours. The thickness of the obtained silicone rubber film (PDMS-3) is about 1mm. And it is relatively transparent, and it is preserved with polypropylene film after taking it out.

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Abstract

The invention belongs to the technical field of novel materials, in particular to a preparation method and application of a silicone rubber film with underwater self-healing capability and adhesiveness. Terephthalaldehyde, isoflurone diisocyanate, tris(2-aminoethyl)amine, 4,4'-diaminodiphenyl disulfide and bis(3-aminopropyl) terminated poly(dimethylsiloxane) are taken as raw materials, and a polycondensation reaction is carried out to form a triple reversible crosslinking network with imine bonds, hydrogen bonds and disulfide bonds. The silicone rubber prepared by the reaction has good mechanical properties, rapid underwater self-healing properties, and excellent adhesion properties and hydrophobicity. The self-healing silicone rubber disclosed by the invention is simple in preparation method and wide in raw material source; and various excellent properties of the self-healing silicone rubber can be used for self-healing waterproof leakage-proof coatings, self-healing waterproof adhesive tapes, protective layers of fragile materials and the like. The viscous self-healing silicone rubber has wide application prospects in the fields of flexible robots and the like.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a preparation method and application of a silicone rubber film with underwater self-healing ability and adhesion. Background technique [0002] Polysiloxane-based elastomers have excellent properties due to their unique structures and the characteristics of Si-O-Si bonds, however, there is an irreversible covalent crosslinking network, and traditional polysiloxane elastomers cannot repair damage nor Recycle. In order to prolong the service life of silicone rubber and to repair itself when damaged or broken, a lot of research has been invested in the development of self-healing silicone elastomers. In addition, polydimethylsiloxane (PDMS) is an important adhesive widely used in many fields such as electronic assembly, automobile, aerospace, construction industry, etc. Commercially used PDMS does not have the function of self-healing, After the adhesive is destr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/75C08G18/65C08G18/61C08G18/32C08G18/38C08G77/392C08G77/388C08J5/18C09J7/10C09J175/02C09J183/08C08L75/02C08L83/08
CPCC08G18/3228C08G18/3863C08G18/61C08G18/6529C08G18/755C08G77/388C08G77/392C08J5/18C08J2375/02C08J2383/08C09J175/02C09J183/08C09J7/10
Inventor 袁宁一严昊丁建宁戴胜平周小双
Owner CHANGZHOU UNIV
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