Preparation method for nanocellulose enhanced bio-based nano rubber latex

A nano-cellulose and nano-latex technology, applied in the chemical industry, can solve the problems of low bonding strength, easy aging and deterioration, poor stability, etc., and achieve the effects of good film formation, greening, and high adhesion.

Active Publication Date: 2017-04-19
九洲生物技术(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, some biological (starch-based) latex products appearing on the market are environmentally friendly and cheap, but they generally have disadvantages such as low bond strength, water resistance, easy aging and deterioration, and poor stability, which limit their application to petroleum-based synthetic rubber. Improvement of the replacement ratio of viscose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] First prepare nanocrystalline starch and nanocellulose: add 2000g of water in a 5000ml three-necked flask, add 40g of raw cornstarch, 20g of pulverized hardwood fiber slurry, and make a dispersion with a concentration of about 3%, medium speed Stir, add buffer solution to control the pH value of the dispersion system to 5.0±0.2, add 2.0 FPU / g complex cellulase, heat in a water bath, the reaction temperature is 60°C, and the reaction time is 2.5h. Then add TEMPO (2,2,6,6-tetramethylpiperidine oxide) 2.5g successively in this dispersed system, sodium bromide 8.0g, sodium hypochlorite solution 150g, with the sodium hydroxide solution of 10% concentration, control The pH value of the oxidation reaction system is 10.5, the reaction temperature is 23° C., and the reaction time is 1.5 h. The carboxyl group content of the oxidized starch and cellulose mixture reaches 1.12mmol / g. Then the mixed solution is concentrated to a concentration of 2.5%, and the concentrated slurry is ...

Embodiment 2

[0029] First prepare nanocrystalline starch and nanocellulose: add 2000g of water to a 5000ml three-necked flask, add 40g of raw cornstarch, 20g of pulverized cotton fiber slurry, make a dispersion with a concentration of about 2%, stir at a medium speed , adding a buffer solution to control the pH value of the dispersion system to 5.0±0.2, adding 3.5 FPU / g complex cellulase, heating in a water bath, the reaction temperature is 60°C, and the reaction time is 3.5h. Then add 12.5g of sodium periodate and 5.0g of sodium bicarbonate to the dispersion system, and use 2% sodium hydroxide solution to control the pH value of the oxidation reaction system to 8.5, the reaction temperature is 45°C, and the reaction time is 2.5h . The carboxyl group content of the oxidized starch and cellulose mixture reaches 1.35mmol / g. Then the mixed solution is concentrated to a concentration of 2.5%, and the concentrated slurry is homogenized with a high-pressure homogenizer, the pressure is 80MPa, a...

Embodiment 3

[0032] First prepare nanocrystalline starch and nanocellulose: add 2000g of water to a 5000ml three-necked flask, add 40g of raw cornstarch, 20g of pulverized cotton fiber slurry, make a dispersion with a concentration of about 2%, stir at a medium speed , adding a buffer solution to control the pH value of the dispersion system to 5.0±0.2, adding 3.5 FPU / g complex cellulase, heating in a water bath, the reaction temperature is 60°C, and the reaction time is 3.5h. Then add 12.5g of sodium periodate and 5.0g of sodium bicarbonate to the dispersion system, and use 2% sodium hydroxide solution to control the pH value of the oxidation reaction system to 8.5, the reaction temperature is 45°C, and the reaction time is 2.5h . The carboxyl group content of the oxidized starch and cellulose mixture reaches 1.35mmol / g. Then the mixed solution is concentrated to a concentration of 2.5%, and the concentrated slurry is homogenized with a high-pressure homogenizer, the pressure is 80MPa, a...

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Abstract

The invention discloses a preparation method for nanocellulose enhanced bio-based nano rubber latex. The method comprises the steps of firstly performing enzymolysis, chemical oxidation pre-treatment and mechanical treatment on starch and plant cellulose fibers as raw materials to obtain nanocrystalline starch and nanocellulose; secondly mixing the nanocrystalline starch and the nanocellulose with natural non-grain degraded starch to prepare a uniform dispersed mixed solution, and performing activation modification treatment; thirdly adding an initiator to the mixed solution for initiating an emulsion polymerization reaction of double-bond monomers, and finally preparing a nanocellulose, nanocrystalline starch and non-grain degraded starch grafted copolymer, namely, the nanocellulose enhanced bio-based nano rubber latex. The nanocellulose and the nanocrystalline starch contained in the bio-based nano rubber latex achieve a remarkable enhancement effect for adhesion of rubber latex; and the bio-based nano rubber latex has the advantages of environmental protection, safety, sustainability and the like, and can be widely applied to the fields of papermaking, spinning, packaging, daily chemicals, building materials and the like.

Description

technical field [0001] The invention relates to a preparation method of nano-cellulose reinforced bio-based nano-latex, which belongs to the technical field of chemical industry. Background technique [0002] Adhesive refers to a kind of natural or synthetic, organic or inorganic substances that can connect two or more parts or materials together through the adhesion and cohesion of the interface, collectively referred to as glue. Adhesive, also known as adhesive. According to the source of adhesives, it can be divided into natural adhesives and synthetic adhesives, such as natural rubber, asphalt, rosin, gelatin, cellulose, starch glue, etc. Adhesives belong to the category of synthetic adhesives. Among them, most of the raw materials used in synthetic adhesives are fossil resources. [0003] Since the beginning of the 21st century, problems such as environmental pollution, greenhouse gas emissions, and resource depletion caused by the exploitation and use of fossil reso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/02C08F251/00C08F220/28C08F220/40
CPCC08F251/00C08F251/02C08F220/281
Inventor 胡云叶洲张晶谈火英戴玲
Owner 九洲生物技术(苏州)有限公司
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