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Hyperbranched-starch-modified zinc oxide and preparation method and application thereof

A starch modification and zinc oxide technology, applied in the field of rubber processing, can solve the problems of short service life and low performance of zinc oxide-rubber composite materials, and achieve the effect of good vulcanization activity and stable properties

Active Publication Date: 2020-01-14
ZHONGCE RUBBER GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve technical problems such as low performance and short service life of zinc oxide-rubber composite materials, an object of the present invention is to provide a modified zinc oxide, which can be uniformly dispersed in the rubber matrix, and has stable properties and no agglomeration phenomenon, which solves the chronic problems of traditional zinc oxide, and can better exert the effects of vulcanization activity and reinforcement

Method used

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  • Hyperbranched-starch-modified zinc oxide and preparation method and application thereof
  • Hyperbranched-starch-modified zinc oxide and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0031] A kind of preparation method of hyperbranched starch modified zinc oxide, the method comprises the steps:

[0032] (1) Add 100kg of tapioca starch into deionized water, heat to boiling under reflux, and stir at high speed until completely dissolved. After dissolving, the pH was adjusted to about 4.0 with 0.1 mol / L hydrochloric acid solution, and 15 g of α-amylase was added, and the reaction was continued for 1.5 h under reflux. After the reaction is finished, the reactant is cooled to room temperature, and the precipitate is filtered off and then dried to obtain the hyperbranched starch.

[0033] (2) Heat the starch prepared in (1) to about 70°C, ultrasonically treat it for 15 minutes, and the ultrasonic power is 100W, then add 1.2kg of tetraethyl titanate, stir for 15 minutes, then add 0.5kg of stearic acid and continue stirring 20min, and finally dried in an oven to obtain hyperbranched hydrophobic starch.

[0034] (3) Dissolve 40kg of zinc acetate in dehydrated eth...

Embodiment 2

[0038] A kind of preparation method of hyperbranched starch modified zinc oxide, the method comprises the steps:

[0039](1) Add 120kg of cornstarch into deionized water, heat to boiling under reflux, and stir at high speed until completely dissolved. After dissolving, the pH was adjusted to about 4.0 with 0.1 mol / L hydrochloric acid solution, and 24 g of anhydroglucosidase was added, and the reaction was continued for 1.2 h under reflux. After the reaction is finished, the reactant is cooled to room temperature, and the precipitate is filtered off and then dried to obtain the hyperbranched starch.

[0040] (2) Heat the starch prepared in (1) to about 70°C, ultrasonically treat it for 15min, and the ultrasonic power is 120W, then add 2kg of tetraethyl titanate, stir for 15min, then add 0.8kg of stearic acid and continue stirring for 20min , and finally dried in an oven to obtain hyperbranched hydrophobic starch.

[0041] (3) Dissolve 60kg of zinc nitrate in dehydrated ethano...

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Abstract

The invention relates to the field of rubber processing, in particular to hyperbranched-starch-modified zinc oxide and a preparation method and application thereof. According to the modified zinc oxide, hyperbranched hydrophobic starch-modified zinc oxide is adopted as the modified zinc oxide, and the zinc oxide is of a nano form, and is distributed on the surface of hyperbranched hydrophobic starch evenly and stably. The zinc oxide can be dispersed in a rubber matrix uniformly, and has stable properties without agglomeration, the problems of traditional zinc oxide are solved, and vulcanization activity, reinforcement and other effects can be developed better.

Description

technical field [0001] The invention relates to the field of rubber processing, in particular to a hyperbranched starch modified zinc oxide and a preparation method and application thereof. Background technique [0002] Zinc oxide is an oxide of zinc, insoluble in water but soluble in acid and strong alkali. Zinc oxide is a relatively commonly used chemical additive, which can be widely used in plastics, rubber, silicate products, lubricants, paints, ointments, adhesives, food, batteries, flame retardants and other fields. Among them, the rubber industry is the largest user of zinc oxide. In the vulcanization molding process of rubber products, zinc oxide is a good vulcanization activator, and zinc oxide also has a certain vulcanization and reinforcement effect on rubber. Because zinc oxide can be combined with the rubber molecular chain at the molecular level, it can improve the performance of the rubber compound and improve the characteristics of the finished product. For...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/04C08K3/22C08B30/12C08B31/00C08L21/00
CPCC08B30/12C08B31/00C08K3/22C08K9/08C08K2003/2296C08K2201/011C08L21/00
Inventor 徐晓鹏侯丹丹张春生潘思宇
Owner ZHONGCE RUBBER GRP CO LTD
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