Method for preparing modified starch-type glass fiber impregnating compound

A technology of glass fiber and sizing, which is applied in the field of preparation of modified starch-type glass fiber sizing, which can solve the problems of poor film-forming properties, poor cohesiveness, and low shear strength, and achieve improved cohesiveness and enhanced mechanical strength and cohesiveness, the effect of reducing surface tension

Inactive Publication Date: 2018-01-26
周荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention: Aiming at the defects of low interfacial shear strength of glass fiber composite materials and poor film-forming and cohesive properties after the current sizing is used to treat glass fibers, a modified starch-based Preparation method of glass fiber sizing agent

Method used

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  • Method for preparing modified starch-type glass fiber impregnating compound

Examples

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Comparison scheme
Effect test

example 1

[0021] Weigh 30 g of buckwheat starch, add 100 mL of water to the buckwheat starch, mix and stir at 85°C for 1 hour, and obtain a starch paste after stirring. Cool the starch paste to 40°C, and adjust the pH to 5 with a mass fraction of 1% hydrochloric acid. Obtain the starch mixture, and then add 3g isoamylase to the starch mixture for enzymatic hydrolysis at 25°C for 1 h. After the enzymolysis is completed, filter and remove the filter residue, and the filtrate is the starch reaction solution. Add 25 mL mass fraction to the starch reaction solution in turn It is 5% sodium sulfate solution, 10mL 2% sodium hydroxide solution and 20mL 0.5% propylene oxide, mixed and stirred at 25°C for 20min, and the gelatinized starch suspension is obtained after stirring and reaction. Mix the gelatinized starch suspension with absolute ethanol at a volume ratio of 3:1 and stir for 10 minutes. After stirring, filter with suction to obtain solids. Continue to grind the solids for 6 minutes to obt...

example 2

[0023] Weigh 40 g of buckwheat starch, add 110 mL of water to the buckwheat starch, mix and stir at 95°C for 1 hour, and obtain a starch paste after stirring. Cool the starch paste to 45°C, and adjust the pH to 5 with a mass fraction of 1% hydrochloric acid. Obtain the starch mixture, and then add 4g isoamylase to the starch mixture for enzymatic hydrolysis at 30°C for 1 hour. After the enzymolysis is completed, filter and remove the filter residue, and the filtrate is the starch reaction solution. Add 30 mL mass fraction to the starch reaction solution in turn 5% sodium sulfate solution, 15mL 2% sodium hydroxide solution and 25mL 0.5% propylene oxide were mixed and stirred at 30°C for 25min. After stirring, the gelatinized starch suspension was obtained. Mix the gelatinized starch suspension and absolute ethanol at a volume ratio of 3:1 and stir for 12 minutes. After stirring, filter with suction to obtain a solid. Continue to grind the solid for 8 minutes to obtain modified st...

example 3

[0025] Weigh 50g of buckwheat starch, add 120mL of water to the buckwheat starch, mix and stir for 2h at 105°C, obtain a starch paste after stirring, cool the starch paste to 50°C, and adjust the pH to 6 with a mass fraction of 1% hydrochloric acid. Obtain the starch mixture, and then add 6g isoamylase to the starch mixture for enzymatic hydrolysis at 35°C for 2 hours. After the enzymolysis is completed, filter and remove the filter residue, and the filtrate is the starch reaction solution. Add 35 mL mass fraction to the starch reaction solution in turn 5% sodium sulfate solution, 18 mL 2% sodium hydroxide solution and 30 mL 0.5% propylene oxide were mixed and stirred at 45°C for 30 minutes. After stirring, the gelatinized starch suspension was obtained. Mix the gelatinized starch suspension with absolute ethanol at a volume ratio of 3:1 and stir for 15 minutes. After stirring, filter with suction to obtain a solid. Continue to grind the solid for 10 minutes to obtain modified s...

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Abstract

The invention discloses a method for preparing a modified starch-type glass fiber impregnating compound, which belongs to the field of glass fiber production. The method comprises the following steps:isoamylase is used for performing enzymatic hydrolysis on buckwheat starch, an etherification reaction is carried out, modified starch is taken as a film forming agent, the viscosity is enhanced, thecaking degree is also increased, an auxiliary film forming agent is added, the bonding cluster force is increased, the modified starch and amylose are mixed, so that the dispersion degree of the filmforming agent on the glass fiber and intensity of the glass fiber are increased, a silane coupling agent is used for modification of quartz sand, microbe is used for decomposition of plant oil to generate a lipophilic ester group, the self-crosslinking effect on the microbe is generated, the compatibility between the quartz sand and a polymer is enhanced, the uniform dispersion intensity is improved, the bonding intensity of the film forming agent on the glass fiber is increased, a proper amount of an emulsifier is added, the surface tension is effectively reduced, the glass fiber surface iseasily wetted by the impregnating compound, and the mechanical strength and caking property of the modified starch-type glass fiber impregnating compound are enhanced.

Description

Technical field [0001] The invention discloses a preparation method of a modified starch type glass fiber sizing agent, which belongs to the field of glass fiber production. Background technique [0002] Glass fiber textile materials are widely used in petrochemical, architectural decoration, and thermal insulation fields. Untreated glass fiber is very brittle, and often requires surface coating to improve its performance. Different sizing agents can give glass fibers different properties. Untwisted coarse sand must have excellent textile properties to meet the needs of different products. Textile sizing agents can not only improve the textile properties of glass fibers, but also increase the fiberglass cloth strength. Sizing agent raw materials and formula technology are the most critical elements for manufacturing high-quality glass fiber, and are also an essential link in the glass fiber production process. The industry vividly compares it to "chip manufacturing technology....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C25/42C03C25/321
Inventor 钟雄杨立军黄婷
Owner 周荣
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