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Preparation method and application for natural latex packing

A natural latex and gel technology, applied in the field of natural latex fillers, can solve the problems of poor mechanical properties of impregnated rubber products, easy to breed bacteria, etc., and achieve the effect of improving antibacterial properties and improving easy agglomeration

Active Publication Date: 2016-11-23
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a natural latex filler and its preparation method and application in view of the shortcomings of carbon black as a rubber filler in the prior art and the problems of poor mechanical properties of impregnated rubber products and easy breeding of bacteria.

Method used

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  • Preparation method and application for natural latex packing
  • Preparation method and application for natural latex packing
  • Preparation method and application for natural latex packing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of natural latex filler, the steps are as follows:

[0032] (1) Weigh a certain amount of chitin powder, add lye at a ratio of 0.5% by mass to volume, and mix evenly;

[0033] (2) Freeze the lye containing chitin powder at a low temperature of -20°C to -50°C for 12 hours, then take out the lye containing chitin powder, and heat it in a water bath at 50°C for 60 minutes to obtain chitin gel;

[0034] (3) Weigh the above-mentioned chitin gel, add acetic acid solution with a volume fraction of 1% according to the proportion of mass volume ratio of 0.5%, and mix well to obtain a mixed solution;

[0035] (4) Ultrasonic treatment of the mixed solution for 0.5 h to obtain an ultrasonically modified chitin gel;

[0036] (5) Soak the obtained ultrasonically modified chitin gel in liquid nitrogen, then transfer it to a freeze dryer, and freeze-dry it at -50°C for 24 hours before use;

[0037] (6) Take the modified starch, add water and mix according to the ...

Embodiment 2

[0046] A preparation method of natural latex filler, the steps are as follows:

[0047] (1) Weigh a certain amount of chitin powder, add lye in a ratio of 2% by mass to volume, and mix evenly;

[0048] (2) Freeze the lye containing chitin powder at a low temperature of -20°C to -50°C for 15 hours, then take out the lye containing chitin powder and heat it in a water bath at 60°C for 50 minutes to obtain chitin gel;

[0049] (3) Weigh the above-mentioned chitin gel, add the acetic acid solution with a volume fraction of 1% according to the mass volume ratio of 1%, and mix well to obtain a mixed solution;

[0050] (4) Ultrasonic treatment of the mixture for 2 hours to obtain an ultrasonically modified chitin gel;

[0051] (5) Dry the obtained ultrasonically modified chitin gel at 40-60°C before use;

[0052] (6) Take the modified starch, mix it with water according to the weight ratio of modified starch:water of 0.3:1, and stir evenly to obtain a modified starch solution;

[...

Embodiment 3

[0061] A preparation method of natural latex filler, the steps are as follows:

[0062] (1) Weigh a certain amount of chitin powder, add lye in a ratio of 5% by mass to volume, and mix evenly;

[0063] (2) Freeze the lye containing chitin powder at a low temperature of -20°C to -50°C for 18 hours, then take out the lye containing chitin powder, and heat it in a water bath at 70°C for 40 minutes to obtain chitin gel;

[0064] (3) Weigh the above-mentioned chitin gel, add the acetic acid solution with a volume fraction of 1% according to the mass volume ratio of 2%, and mix well to obtain a mixed solution;

[0065] (4) Ultrasonic treatment of the mixed solution for 3.5 hours to obtain an ultrasonically modified chitin gel;

[0066] (5) Soak the obtained ultrasonically modified chitin gel in liquid nitrogen, then transfer it to a freeze dryer, and freeze-dry it at -50°C for 25 hours before use;

[0067] (6) Take the modified starch, add water and mix according to the weight rat...

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Abstract

The invention relates to a preparation method and application for natural latex packing. The natural latex packing is prepared by taking chitin and modified starch as main raw materials and by combining the technologies of freezing-thawing, ultrasound and the like with a chemical modifying method, and has double functions of reinforcing and resisting bacteria. The preparation method for the natural latex packing provided by the invention is simple in process, wide in raw material source and low in cost; the prepared natural latex packing is safe and environment-friendly, and can be used for partially replacing carbon black, white carbon black, raw rubber and the like in rubber industry; the pollution to the environment is reduced, and the production cost of a rubber product is reduced; moreover, rubber composite packing is endowed with a certain antibacterial property, so that the antibacterial effect of the rubber product is improved, the rubber quality is improved, and the application range of a rubber impregnated product is enlarged.

Description

technical field [0001] The invention relates to a natural latex filler, in particular to a preparation method and application of the natural latex filler. Background technique [0002] As a national strategic material, rubber occupies a very important position in the national economy. Whether in civil or national defense, because it has many excellent properties, such as insulation, wear resistance, good elasticity, impermeability, etc., rubber can be widely used in industry, transportation, and people's daily life. application. However, the tensile stress, constant elongation stress, tear strength and wear resistance of rubber are mostly achieved by adding fillers. The amount of filler is usually more than half of the amount of rubber, which plays a dual role of reinforcement and increment. Therefore, it is very important to choose the filling system correctly. [0003] Carbon black is the most widely used filler in the rubber industry. At the beginning of the 20th cen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/08C08L3/10C08L3/04C08L5/08C08L21/02C08K5/00C08K5/548C08K5/544C08K5/10C08K5/54
CPCC08L3/04C08L3/08C08L3/10C08L21/02C08L2201/08C08L2205/03C08L5/08C08K5/00C08K5/54C08K5/544C08K5/10C08K5/548
Inventor 林宝凤邹海仲
Owner GUANGXI UNIV
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