Preparation method of nano SiO2/starch-based composite adhesive

A composite adhesive and starch-based technology, applied in the direction of starch adhesives, adhesive types, adhesive additives, etc., can solve the problems of reducing the viscosity of the system and high starch viscosity, and achieve the goals of reducing viscosity, simplifying the preparation process, and avoiding agglomeration Effect

Active Publication Date: 2017-08-29
广州零醛通新材料贸易有限公司
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  • 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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  • Preparation method of nano SiO2/starch-based composite adhesive
  • Preparation method of nano SiO2/starch-based composite adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Preparation of water glass sodium silicate gelatinized starch: After mixing liquid sodium hydroxide and quartz sand with a concentration of 10wt.% in a mass ratio of 1:1, add 15% of 40% of the mass of liquid sodium hydroxide concentration of starch solution, after heating up to 100°C under high pressure, the stirring reaction continued for 80 minutes, and SiO, which accounted for 16% of the mass of liquid sodium hydroxide, was added. 2 , to prepare water glass sodium silicate gelatinized starch emulsion;

[0028] 2. Preparation of starch adhesive: add additives such as 1% plasticizer glycerin, 0.2% crosslinking agent borax, 0.3% defoamer tributyl phosphate, 0.5% to the prepared water glass sodium silicate gelatinized starch emulsion % emulsifier sodium lauryl sulfate, etc., after stirring continuously for 30 minutes at 60°C, nano-SiO can be obtained 2 / Starch-based composite adhesive.

Embodiment 2

[0030] 1. Preparation of water glass sodium silicate gelatinized starch: After mixing liquid sodium hydroxide and quartz sand with a concentration of 12wt.% in a mass ratio of 1:2, add 18% of the mass ratio of liquid sodium hydroxide to be 45%. % concentration of the starch solution, after heating up to 110°C under high pressure, the stirring reaction continued for 90min, and SiO was added to account for 18% of the mass of liquid sodium hydroxide. 2 , to prepare water glass sodium silicate gelatinized starch emulsion;

[0031] 2. Preparation of starch adhesive: add additives such as 2% plasticizer urea, 0.3% crosslinking agent toluene diisocyanate, 0.4% defoaming agent polydimethyl to the prepared water glass sodium silicate gelatinized starch emulsion Siloxane, 1% emulsifier sodium dodecylbenzene sulfonate, etc., after continuous stirring at 65°C for 30 minutes, nano-SiO can be obtained 2 / Starch-based composite adhesive.

Embodiment 3

[0033] 1. Preparation of water glass sodium silicate gelatinized starch: After mixing the liquid sodium hydroxide and quartz sand with a concentration of 14wt.% in a mass ratio of 1:3, add 21% of 50% of the mass of liquid sodium hydroxide concentration of starch solution, after heating up to 120°C under high pressure, the stirring reaction lasted for 100min, and added SiO which accounted for 20% of the mass of liquid sodium hydroxide 2 , to prepare water glass sodium silicate gelatinized starch emulsion;

[0034] 2. Preparation of starch adhesive: add additives such as 3% plasticizer phthalate diester, 0.4% crosslinking agent trimethylol phenol, 0.5% Antifoaming agent polyoxyethylene polyoxypropanol amine ether, 1.5% emulsifier OP-10, etc., after continuous stirring at 70°C for 30 minutes, nano-SiO can be obtained 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 The preparation method of / starch-based composite adhesive. Background technique [0002] Starch is a natural high molecular polymer composed of glucose units, it is a white powder, and its chemical formula is [C 6 h 10 o 5 ] n , is composed of two major components, amylose and amylopectin, and has unique physical and chemical properties. Starch adhesives have the advantages of wide source of raw materials, simple process, convenient operation, low cost, degradable, renewable, and environmental protection, but there are also disadvantages such as poor water resistance, poor storage stability, poor fluidity, and low adhesive strength, which limit the Its application in the field of wood bonding (Wang Junli, Fuxiong, Huang Qiang, etc. Research progress of starch-based wood adhesives [J]. China Adhesives, 2006,15(1):45-48.). [0003] Water glass is a sodium silic...

Claims

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Application Information

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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