Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Thermally reversible crosslinking gutta-percha double-shape memory elastomer and preparation method thereof

A dual-shape, Eucommia glue technology, applied in the field of shape memory elastomers, can solve the problems of large consumption, Eucommia glue cannot be reused many times, and low recovery rate of shape memory, so as to achieve energy saving, good repeatable processing performance, The effect of flexible shape changes

Active Publication Date: 2017-06-13
BEIJING UNIV OF CHEM TECH
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above problems, the present invention provides a thermally reversible cross-linked eucommia gum double shape memory elastomer through the method of thermally reversible bond cross-linked eucommia gum, which solves the problem that the eucommia gum cannot be reused many times, consumes a lot, and has a shape memory Questions with low response rates

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Thermally reversible crosslinking gutta-percha double-shape memory elastomer and preparation method thereof
  • Thermally reversible crosslinking gutta-percha double-shape memory elastomer and preparation method thereof
  • Thermally reversible crosslinking gutta-percha double-shape memory elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 100g of eucommia gum (commercially available) with a crystallinity of 40% is dissolved in 1000ml of toluene solvent, stirred until fully dissolved to form a uniform, transparent solution; then 30g of furfuryl mercaptan, 1g of 2-methyl-1-( -4-methylthiophenyl)-2-morpholino-1-propanone, added to the dissolved solution, and irradiated with ultraviolet light (spectronics SB-100P / FC, the same below) at 30°C for 30min, grafting occurred reaction, washed with methanol, and suction filtered to remove unreacted dienes; the grafted product and 50 g of diphenylmethane bismaleimide were added to 1000 ml of tetrahydrofuran solution, stirred at 30 ° C until fully dissolved, 40 Vacuum dry at ℃ for 24 hours to remove the solvent; use a flat vulcanizing machine (manufactured by Zhejiang Huzhou Dongfang Machinery Co., Ltd., model XLB-D350X350, the same below) to heat press at a pressure of 15Mpa and a temperature of 120℃ for 30 minutes, and thermal reversibility occurs. Cross-linking to ...

Embodiment 2

[0025] 100g of eucommia peptiformis with a crystallinity of 50% was dissolved in 1000ml of tetrahydrofuran solvent, stirred until fully dissolved to form a uniform and transparent solution; 40g of furfurylamine, 2g of 2,2-dimethoxy-2-phenylbenzene Add ethyl ketone to the dissolved solution, and irradiate with ultraviolet light for 60 minutes at 20°C to cause grafting reaction, wash with methanol and filter with suction to remove unreacted dienes; mix the grafted product with 70g of diphenylmethane bismale The imide was added to 1000ml tetrahydrofuran solution, stirred at 30°C until fully dissolved, then vacuum-dried at 40°C for 24 hours, and the solvent was removed; the product was hot-pressed at 110°C for 30 minutes under a pressure of 15Mpa, and a thermally reversible crosslinking reaction occurred to obtain Shape memory elastomers crosslinked by thermoreversible bonds. The properties are shown in Table 1.

Embodiment 3

[0027] 100g of eucommia gum with a crystallinity of 40% was dissolved in 1000ml of toluene and tetrahydrofuran mixed solvent, stirred until fully dissolved to form a uniform and transparent solution; 50g of methoxythiophene, 3g of 2,4,6-trimethyl Add benzoyl-diphenylphosphine oxide to the dissolved solution, irradiate with ultraviolet light at 35°C for 2 hours, and a grafting reaction occurs, wash with methanol and filter with suction to remove unreacted dienes; mix the grafted product with 90g The bismaleimide hexane was added to 1000ml tetrahydrofuran, stirred at 30°C until fully dissolved, then vacuum-dried at 40°C for 24 hours, and the solvent was removed; Reversible cross-linking to obtain a shape-memory elastomer cross-linked by thermoreversible bonds. The properties are shown in Table 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a thermally reversible crosslinking gutta-percha double-shape memory elastomer and a preparation method thereof. The preparation method comprises the following steps: performing grafting reaction on gutta-percha, a diene body and a photoinitiator in a solution; and performing thermally reversible crosslinking of the graft product and a dienophile crosslinking agent to obtain a shape memory elastomer. According to the elastomer, grafting and then hot pressing are performed in the solution, and the technology is simple. The prepared elastomer has double-shape memory performance as well as good fixed rate and recovery rate and can be repeatedly utilized to save energy and resource.

Description

[0001] Technical field: [0002] The invention relates to a shape-memory elastomer, in particular to a heat-reversible cross-linked Eucommia gum double shape-memory elastomer and a preparation method thereof. [0003] Background technique: [0004] Shape memory elastomer refers to an elastic body that has an initial shape, and after being deformed and fixed under certain conditions, it can be restored to its original shape by stimulation of specific external conditions. Due to the designability of its "deformation-fixation-recovery" process, it has become an intelligent material with extensive application prospects and great development potential. It has been used in medical equipment, automobiles, intelligent anti-counterfeiting, printing, electronics, stationery, clothing And aerospace and other fields to show its great research value. [0005] Because Eucommia gum itself has a crystalline structure, it can undergo crystallization-melt phase transition, endowed with shape me...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08F253/00C08F285/00C08L51/04
CPCC08F253/00C08F285/00C08J3/24C08J2351/04
Inventor 田明胡静宁南英张立群冯展彬
Owner BEIJING UNIV OF CHEM TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com