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Method for solidification of natural rubber latex by means of oxidized graphene powder

A graphene powder and natural latex technology, applied in the field of rubber manufacturing technology, can solve the problem of high processing cost of graphene oxide, and achieve the effects of saving transportation cost, strong smell and simple equipment

Inactive Publication Date: 2016-07-27
JIANGSU GENERAL SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of graphene oxide treatment in this method is relatively high, and acidic medium still needs to be added

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: a kind of method utilizing graphene oxide powder to coagulate natural rubber latex, comprises the following steps:

[0030] (1) Put the graphene oxide powder into the natural latex, the graphene oxide content is 1‰ of the natural latex content; adjust the pH value to 2 by adding a small amount of acetic acid aqueous solution, stir evenly to dissolve the graphene oxide in the natural latex;

[0031] (2) Ultrasonic treatment is performed on the natural latex obtained in step (1) for 1 hour, and the ultrasonic power is 1500W; the natural latex is subjected to ultrasonic treatment to increase the graphene oxide monolayer rate and solubility, and the natural latex solidifies under the action of an acidic solution ;

[0032] (3) After ultrasonic treatment, place the natural rubber latex until solidified;

[0033] (4) After the natural rubber latex is solidified, the excess water and acidic solution are removed by rolling and washing, but there is no loss of gra...

Embodiment 2

[0034] Embodiment 2: a kind of method utilizing graphene oxide powder to coagulate natural rubber latex, comprises the following steps:

[0035] (1) Put the graphene oxide powder into the natural latex, the graphene oxide content is 1% of the natural latex content; adjust the pH value to 4 by adding a small amount of acetic acid aqueous solution, stir evenly to dissolve the graphene oxide in the natural latex;

[0036] (2) Ultrasonic treatment is performed on the natural latex obtained in step (1) for 2 hours, and the ultrasonic power is 500W; the natural latex is subjected to ultrasonic treatment to increase the graphene oxide monolayer rate and solubility, and the natural latex solidifies under the action of an acidic solution ;

[0037] (3) After ultrasonic treatment, place the natural rubber latex until solidification;

[0038] (4) After the natural rubber latex is solidified, the excess water and acidic solution are removed by rolling and washing, but there is no loss of...

Embodiment 3

[0039] Embodiment 3: a kind of method utilizing graphene oxide powder to coagulate natural rubber latex, comprises the following steps:

[0040] (1) Put graphene oxide powder into natural rubber latex, the content of graphene oxide is 5‰ of natural rubber latex; adjust the pH value to 3 by adding a small amount of acetic acid aqueous solution, formic acid aqueous solution or sulfuric acid aqueous solution, and stir evenly to dissolve graphene oxide in natural latex;

[0041] (2) Ultrasonic treatment is performed on the natural latex obtained in step (1) for 1.5 hours, and the ultrasonic power is 1000W; the natural latex is subjected to ultrasonic treatment to increase the graphene oxide monolayer rate and solubility, and the natural latex solidifies under the action of an acidic solution ;

[0042] (3) After ultrasonic treatment, place the natural rubber latex until solidification;

[0043] (4) After the natural rubber latex is solidified, the excess water and acidic solutio...

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PUM

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Abstract

The invention relates to a method for solidification of natural rubber latex by means of oxidized graphene powder. The method is characterized by comprising the steps of 1, placing oxidized graphene powder in natural rubber latex, adjusting the pH value of natural rubber latex to be 2-4, and stirring the mixture evenly to enable oxidized graphene to be dissolved in natural rubber latex, wherein the content of oxidized graphene is 0.001-1% that of natural rubber latex; 2, conducting ultrasonic treatment on the natural rubber latex obtained in the step 1; 3, making the treated natural rubber latex stand till solidification. The pH value of natural rubber latex is adjusted to be 2-4 by adding acid solution or water in the step 1. Due to the fact that oxidized graphene obtained through industrialized mass production has the characters of strong acid after being dissolved in natural rubber latex, the acid environment of an oxidized graphene aqueous solution is directly utilized for solidifying natural rubber latex, monolayer rate is increased through ultrasonic treatment, an oxidized graphene-natural rubber material high in dispersion degree can be obtained, and various properties of rubber are improved greatly.

Description

technical field [0001] The invention relates to a method for solidifying natural rubber latex by using graphene oxide powder, which belongs to the technical field of rubber manufacturing technology. Background technique [0002] Natural rubber is an elastic solid obtained by coagulating the latex secreted by the rubber tree. The processing steps of fresh latex generally include latex preservation, removal of impurities, mixing, coagulation, clot dehydration or tableting, granulation, drying, inspection, and packaging. Among them, the coagulation of fresh latex is one of the important links that affect the quality of natural rubber. Acid coagulation is a process of latex coagulation. It mainly refers to adding a certain amount of ammonia as a preservative to the fresh latex, and then transporting it back to the processing plant for concentrated coagulation processing, and the added acid is used to neutralize the ammonia and solidify the latex. The acids used in the coagulat...

Claims

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Application Information

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IPC IPC(8): C08C1/15C08K3/04C08L7/02
CPCC08C1/15C08K3/04C08L7/02
Inventor 朱健鹏张洪学刘宇艳周平
Owner JIANGSU GENERAL SCI TECH