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Method for preparing rubber water absorbent composite material comprising starch

A composite material and starch technology, which is applied in the field of preparation of starch-containing rubber water-absorbing composite materials to achieve the effects of strong hydrophilicity, wide sources, good mechanical properties and water absorption properties

Inactive Publication Date: 2010-06-02
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The work of using starch as a reinforcing component to prepare rubber water-absorbing materials has not been reported at home and abroad.

Method used

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  • Method for preparing rubber water absorbent composite material comprising starch
  • Method for preparing rubber water absorbent composite material comprising starch
  • Method for preparing rubber water absorbent composite material comprising starch

Examples

Experimental program
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Embodiment 1

[0025] The starch was stirred and mixed in deionized water at 95° C. for 20 minutes for gelatinization. The weight concentration of the starch aqueous solution was 0.2%, and then the nitrile latex with a weight concentration of 0.1% was mixed with the starch aqueous solution, wherein the ratio of the nitrile gum to the starch was 100:10 Finally, the sodium acrylate aqueous solution that is 0.5% by weight is mixed in the blending system of the starch aqueous solution butyronitrile latex and stirred, wherein the ratio of sodium acrylate and nitrile rubber is 100:10, and then the stirring speed is under the condition of 300r / min The compound of the three is sprayed out by a spray dryer; the feed rate of the mixed solution is 2ml / min, and the inlet temperature is 190°C. Add 9 parts of zinc oxide and 0.4 parts of dicumyl peroxide (DCP) to the obtained compound in sequence on a double-roller mill and mix evenly. The mixed rubber is vulcanized on a flat vulcanizer to obtain vulcanized...

Embodiment 2

[0027] The starch was stirred and mixed in deionized water at 95°C for 20 minutes for gelatinization, the weight concentration of the starch aqueous solution was 20%, and then the nitrile latex with a weight concentration of 10% was mixed with the starch aqueous solution, wherein the ratio of the nitrile rubber to the starch was 100:20 Finally, the weight concentration of 5% sodium acrylate aqueous solution is mixed into the blending system of starch aqueous nitrile latex and stirred, wherein the ratio of nitrile rubber and sodium acrylate is 100: 20, and then the stirring speed is 600r / min condition The compound of the three is sprayed out by a spray dryer; the feed rate of the mixed solution is 12ml / min, and the inlet temperature is 200°C. Add 9 parts of zinc oxide and 0.4 parts of dicumyl peroxide (DCP) to the obtained compound in sequence on a double-roller mill and mix evenly. The mixed rubber is vulcanized on a flat vulcanizer to obtain vulcanized rubber. °C×T90. Its me...

Embodiment 3

[0029] Stir and mix the starch in deionized water at 95°C for 20 minutes for gelatinization, the weight concentration of the starch aqueous solution is 2%, and then mix the neoprene latex with the weight concentration of 5% with the starch aqueous solution, wherein the ratio of neoprene to starch is 100:20 Finally, the weight concentration of 5% sodium acrylate aqueous solution is mixed into the starch aqueous neoprene latex blending system and stirred, wherein the ratio of neoprene to sodium acrylate is 100:40, and then the stirring speed is 600r / min condition The compound of the three is sprayed out by a spray dryer; the feed rate of the mixed solution is 6ml / min, and the inlet temperature is 200°C. Add 1 part of stearic acid, 0.5 part of accelerator NA-22, 0.5 part of accelerator DM, 0.5 part of dicumyl peroxide, 5 parts of zinc oxide, and 0.5 part of 4 parts, kneading, packing into triangles, rolling, and mixing uniformly to obtain rubber compound; vulcanized on a flat vul...

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Abstract

The invention discloses a method for preparing a rubber water absorbent composite material comprising starch. In the method, a spray dryer is adopted to spray out a complex of the rubber base, the starch and the sodium acrylate, and then the complex and other auxiliary agents are subjected to mixing and sulfuration to obtain the rubber water absorbent composite material comprising the starch. The invention also discloses another preparation method of the rubber water absorbent composite material comprising the starch. In the another method, firstly, the rubber base and the starch are subjected to flocculation coprecipitation, and then the coprecipitate and other auxiliary agents are subjected to mixing and sulfuration to obtain the rubber water absorbent composite material comprising the starch. The another method disclosed by the invention is characterized by directly carrying out mixing and sulfuration on the rubber base, the starch, the sodium acrylate and the like to obtain the rubber water absorbent composite material comprising the starch. The rubber water absorbent composite material comprising the starch, which is prepared by the method of the invention, has better enhancement effect and shows better mechanical property and water absorption performance.

Description

technical field [0001] The invention relates to a method for preparing a starch / rubber water-absorbing composite material by using starch as a reinforcing agent for rubber water-absorbing materials by a melt method. Background technique [0002] As a new type of functional polymer material, rubber water-absorbing material has been widely valued by people for its unique dual characteristics of elastic sealing and water-stopping and water-absorbing expansion to water-stop since it came out in the 1970s. It can be widely used in tunnels. , Subway, offshore oil extraction, precision instruments and food, etc. are waterproof and moisture-proof. [0003] According to the principle of material compatibility, rubber water-absorbing materials are generally composed of polar matrix rubber, reinforcing components, water-absorbing components and other additives. The rubber matrix provides the basic physical properties of the material, and the water-absorbing component imparts water-abs...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08L11/00C08L3/02C08L33/02C08L51/04C08L51/02C08F120/06
Inventor 吴友平宋帅帅马建华杨磊张立群
Owner BEIJING UNIV OF CHEM TECH