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A kind of preparation method of nanometer sio2/starch-based composite adhesive

A composite adhesive and starch-based technology, applied in starch adhesives, adhesive types, adhesive additives, etc., can solve problems such as high starch viscosity and reduce system viscosity, simplify the preparation process, reduce viscosity, and save energy Effect

Active Publication Date: 2018-10-23
广州零醛通新材料贸易有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the invention is to provide a kind of nano SiO 2 / The preparation method of starch-based composite adhesive, the gelatinized starch macromolecules can be coated with nano-SiO produced in the water glass boiling process 2 surface, reduce the viscosity of the system, and solve the problem of excessive starch viscosity when the gelatinization is sufficient

Method used

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  • A kind of preparation method of nanometer sio2/starch-based composite adhesive
  • A kind of preparation method of nanometer sio2/starch-based composite adhesive

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Embodiment 1

[0027] 1. Preparation of sodium silicate gelatinized starch for sodium silicate: After mixing liquid sodium hydroxide with a concentration of 10wt% and quartz sand uniformly at a mass ratio of 1:1, add a concentration of 15% that accounts for 40% of the liquid sodium hydroxide mass After the starch solution was heated to 100 °C under high pressure, the stirring reaction continued for 80 min, and SiO, which accounted for 16% of the liquid sodium hydroxide mass, was added. 2 , the water glass sodium silicate gelatinized starch emulsion can be prepared;

[0028] 2. Preparation of starch adhesive: Add additives such as 1% plasticizer glycerol, 0.2% crosslinking agent borax, 0.3% defoamer tributyl phosphate, 0.5 % of the emulsifier sodium lauryl sulfate, etc., nano-SiO can be obtained after continuous stirring at 60 ° C for 30 min 2 / Starch-based composite adhesive.

Embodiment 2

[0030] 1. Preparation of sodium silicate gelatinized starch for sodium silicate: After mixing liquid sodium hydroxide with a concentration of 12wt% and quartz sand uniformly at a mass ratio of 1:2, add 18% liquid sodium hydroxide with a mass ratio of 45% The concentration of starch solution was heated to 110 ° C under high pressure, and the stirring reaction continued for 90 min, and SiO, which accounted for 18% of the liquid sodium hydroxide mass, was added. 2 , the water glass sodium silicate gelatinized starch emulsion can be prepared;

[0031] 2. Preparation of starch adhesive: Add auxiliaries such as 2% plasticizer urea, 0.3% crosslinking agent toluene diisocyanate, 0.4% defoamer polydimethyl methacrylate to the prepared sodium silicate gelatinized starch emulsion. Siloxane, 1% emulsifier sodium dodecyl benzene sulfonate, etc., nano-SiO can be obtained after continuous stirring at 65 ° C for 30 min 2 / Starch-based composite adhesive.

Embodiment 3

[0033] 1. Preparation of sodium silicate gelatinized starch for sodium silicate: After mixing liquid sodium hydroxide with a concentration of 14wt% and quartz sand uniformly at a mass ratio of 1:3, add a concentration of 21% that accounts for 50% of the liquid sodium hydroxide mass After the starch solution was heated to 120 °C under high pressure, the stirring reaction continued for 100 min, and SiO2, which accounted for 20% of the liquid sodium hydroxide mass, was added. 2 , the water glass sodium silicate gelatinized starch emulsion can be prepared;

[0034] 2. Preparation of starch adhesive: Add additives such as 3% plasticizer phthalate diester, 0.4% crosslinking agent trimethylol phenol, 0.5% Defoamer polyoxyethylene polyoxypropanolamine ether, 1.5% emulsifier OP-10, etc., nano-SiO can be obtained after continuous stirring at 70 ° C for 30 min 2 / Starch-based composite adhesive.

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Abstract

The invention relates to a preparation method of a nano SiO2 / starch-based composite adhesive. The preparation method comprises the following preparation steps: 1) preparation of a water glass sodium silicate gelatinized starch emulsion: uniformly mixing liquid caustic soda and quartz sand, adding a starch aqueous solution, raising the temperature to 100-140 DEG C under high pressure, stirring for a reaction lasting for 80-120 minutes, simultaneously performing water glass sodium silicate decoction and starch gelatinization and then adding SiO2 to obtain the water glass sodium silicate gelatinized starch emulsion; 2) preparation of a starch adhesive: adding an auxiliary and uniformly stirring at a temperature of 60-80 DEG C to obtain the nano SiO2 / starch-based composite adhesive. The preparation method provided by the invention has the benefits that the starch gelatinization process and the water glass decoction process are simultaneously performed, so that the preparation process of the composite adhesive is simplified, and energy resources are saved; the problem of too high starch viscosity when the gelatinization is sufficient is solved; the water resistance of the adhesive is improved.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to a nano-SiO 2 / Preparation method of starch-based composite adhesive. Background technique [0002] Starch is a natural high molecular polymer composed of glucose units, which is white powder with the chemical formula [C 6 H 10 O 5 ] n , It is composed of two components, amylose and amylopectin, with unique physical and chemical properties. Starch adhesive has the advantages of wide source of raw materials, simple process, convenient operation, low cost, degradable, renewable, environmental protection, etc., but it also has disadvantages such as poor water resistance, poor storage stability, poor fluidity, and low bonding strength, which limit the Its application in the field of wood bonding (Wang Junli, Fuxiong, Huang Qiang, et al. Research progress of starch-based wood board adhesives [J]. China Adhesives, 2006,15(1):45-48.). [0003] Water glass is a solution of sodium...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J103/02C09J11/04
CPCC08K3/36C08K2201/011C09J11/04C09J103/02
Inventor 吴力立汪文杰张松峰张超灿
Owner 广州零醛通新材料贸易有限公司
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