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Boron-oxygen bond-containing repairable easily-soluble organosilicone elastomer and preparation method thereof

An easy-to-dissolve, silicone technology, applied in the field of flexible materials, to achieve the effect of simple operation method, universality and good mechanical properties

Pending Publication Date: 2020-02-14
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, patent CN 109749086 A discloses a method for preparing a self-healing silicone elastomer, which includes: 1,2-dithiocyclopentyl derivative A and amino polysiloxane derivative B are chain-extended Reaction synthesis of polysiloxane containing 1,2-dithiocyclopentyl; using the dynamic disulfide bond of polysiloxane terminal dithiocyclopentyl group to realize the reversible crosslinking of silicone elastomer, and prepare a Self-healing silicone elasticity, but the inventors found that there is still room for research in the mechanical properties and degradability of the material

Method used

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  • Boron-oxygen bond-containing repairable easily-soluble organosilicone elastomer and preparation method thereof
  • Boron-oxygen bond-containing repairable easily-soluble organosilicone elastomer and preparation method thereof
  • Boron-oxygen bond-containing repairable easily-soluble organosilicone elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Dissolve 10g of α, ω-aminopropyl polysiloxane (Mn: 2000), 0.67g of terephthalaldehyde (purity: 98%), and 0.53g of 3-aminophenylboronic acid in an appropriate amount of tetrahydrofuran (the monomer concentration is kept at about 0.1g / ml), mixed uniformly at 40°C, reacted for 12 hours, poured into a polytetrafluoroethylene mold, and dried at a constant temperature until constant weight to obtain a silicone elastomer. Cut the silicone elastomer into a dumbbell shape (length×width×thickness: 50×4×0.8mm 3 ), the sample was broken with an Instron3343 electronic universal testing machine at room temperature at a tensile rate of 50mm / min, and the fractured surface of the sample was fully contacted, and then the sample was placed in a 100°C vacuum oven for repair for 15 minutes before testing or at room temperature. Repair under a certain pressure for 12 hours or in water at room temperature for 30 minutes.

[0064] Figure 1-5 FT-IR images of silicone elastomers, optical mic...

Embodiment 2

[0067] The procedure described in Example 1 was repeated, except that 0.67 g of terephthalaldehyde was replaced by 1.0 g of glutaraldehyde (50 wt %).

Embodiment 3

[0069] Repeat the steps described in Example 1, except that 10 g of α, ω-aminopropyl polysiloxane (Mn: 2000) is replaced by 27.5 g of α, ω-aminopropyl polysiloxane (Mn: 5000).

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Abstract

The invention relates to a boron-oxygen bond-containing repairable easily-soluble organosilicone elastomer and a preparation method thereof. According to the invention, an amino-containing polysiloxane derivative A, a chain extender aldehyde-containing monomer derivative B and 3-aminophenylboronic acid C are used, organopolysiloxane with a main chain containing a boron-oxygen bond and a dynamic imine bond is formed through a boron hydroxyl condensation reaction and a Schiff base reaction, multiple hydrogen bonds are formed between amino and hydroxyl and hydroxyl and hydroxyl, and therefore therepairable easily-soluble organosilicone elastomer is prepared. The organosilicone elastomer prepared by the method has the advantages of good mechanical properties, dissolving properties, self-repairing properties in heat and water, and high self-repairing efficiency, and can be applied to the fields of flexible display, flexible sensing, wearable electronic products, electronic skin and the like.

Description

technical field [0001] The invention belongs to the field of flexible materials, in particular to a repairable and easily soluble organic silicon elastomer containing boron-oxygen bonds and a preparation method thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the continuous development of polymer materials and electronic science, the demand for various flexible electronic devices in people's daily life is increasing. Among them, the most prominent research fields are flexible display, flexible sensing, and wearable electronic products. , electronic skin and other directions, various flexible electronic devices often require an ideal stretchable elastomer as a...

Claims

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Application Information

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IPC IPC(8): C08G77/44
CPCC08G77/44
Inventor 刘月涛张凯铭郭柯宇侯欣宇袁林张纪庆高传慧武玉民
Owner QINGDAO UNIV OF SCI & TECH
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