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Sulfonated eucommea rubber preparation method

A technology of sulfonated Eucommia gum and Eucommia gum, which is applied in the field of preparation of sulfonated Eucommia gum, can solve problems such as gelation, achieve stable and easy-to-control heat release, less side reactions, and broaden the performance/functional range

Inactive Publication Date: 2018-08-07
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for rubber with high unsaturation, such as butadiene rubber and isoprene rubber, it is easy to form gel when the above-mentioned sulfonating agent is selected for sulfonation.

Method used

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  • Sulfonated eucommea rubber preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Prepare the eucommia gum emulsion with a solid content of 5% and the aqueous solution of sodium p-styrenesulfonate with a mass ratio of 10%; under nitrogen protection, add the aqueous solution of sodium p-styrenesulfonate dropwise to the Eucommia gum at a speed of 3 s / drop In the emulsion, the catalyst potassium persulfate is added at the same time, and reacted at 60°C until phase separation; the product is separated, washed and dried to obtain sulfonated Eucommia gum.

Embodiment 2

[0019] Prepare the eucommia gum emulsion with a solid content of 3% and the aqueous solution of sodium p-styrene sulfonate with a mass ratio of 15%; under nitrogen protection, add the aqueous solution of sodium styrene sulfonate dropwise to the eucommia gum emulsion at a speed of 3 s / drop In the process, the catalyst benzoyl peroxide was added at the same time, and the reaction was carried out at 75°C until phase separation; the product was separated, washed and dried to obtain sulfonated Eucommia gum.

Embodiment 3

[0021] Prepare the eucommia gum emulsion with a solid content of 7.5% and the aqueous solution of sodium allyl sulfonate with a mass ratio of 5%; under nitrogen protection, add the aqueous solution of allyl sodium sulfonate dropwise to the eucommia gum at a speed of 3 s / drop In the emulsion, the catalyst benzoyl peroxide is added at the same time, and reacted at 60° C. until phase separation; the product is separated, washed and dried to obtain sulfonated Eucommia gum.

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Abstract

The invention provides a sulfonated eucommea rubber preparation method, and relates to a sulfonated rubber preparation method which includes the steps: preparing eucommea rubber emulsion and water solution of sulfonating agents A; slowly dripping the water solution of the sulfonating agents A into the eucommea rubber emulsion under protection of nitrogen, adding catalysts B, and reacting mixture at the temperature of 40-90 DEG C until the mixture is separated; separating, washing and drying products to obtain the sulfonated eucommea rubber. The sulfonate groups are introduced, and hydrophilicity, dielectric property and a shape memory function or self-repairing function of the eucommea rubber can be given. Sulfonation reaction is applicable to sulfonation modification of high-unsaturationrubber, a sulfonating agent is stable, convenient to operate and mild in reaction condition, and sulfonation reaction is stable in heating and easy to control and less in side reaction and does not easily generate gel. Glass-transition temperature with low eucommea rubber and high elasticity given by double-bond flexibleness are combined with the dielectric property and the self-repairing function, and the sulfonated eucommea rubber has potential application in the fields such as robotic soft materials, ion exchange membranes and flexible sensors.

Description

technical field [0001] The invention relates to a preparation method of sulfonated rubber, more specifically to a preparation method of sulfonated Eucommia gum. Background technique [0002] At present, the shortage of natural rubber resources is becoming more and more serious; on the other hand, the impact on energy and environment during the production and use of synthetic rubber has gradually attracted global attention. In this context, as a unique polymer resource in my country, the extraction and application development of Eucommia gum has attracted much attention, showing important application prospects and potential economic value. [0003] The chemical composition of eucommia gum is trans-1,4 polyisoprene. The flexible chain, rich in double bonds and crystallization in its molecular structure make eucommia gum present the performance characteristics of rubber and plastic integration. Since the crystalline structure conceals the properties of the double bond and flex...

Claims

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Application Information

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IPC IPC(8): C08C19/28C08C19/20
CPCC08C19/28C08C19/20
Inventor 杨凤代丽张嫚李元哲方庆红康海澜
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY