Preparation method of cassava starch based biomass formaldehyde-free wood adhesive

A technology of wood adhesive and tapioca starch, applied in the field of wood adhesive, can solve the problems of low starch glue solid content, weak bonding strength, poor water resistance of biological glue, etc., and achieves the goal of promoting harmonious development of national economy and society and broad application prospects Effect

Inactive Publication Date: 2012-07-11
NANJING JIAYUAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing formaldehyde-free wood adhesive using cassava starch as the base mat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add polyvinyl alcohol and water with a mass ratio of 1:4 to the reactor and soak for 12 hours, heat while stirring to keep the temperature at 90°C, dissolve for 90 minutes, cool naturally to about 60°C, and then add the mass fraction to be the mass of polyvinyl alcohol 0.6% Catalyst FeSO 4 ·7H 2 O, then slowly add the pure H with a mass fraction of 4.5% of the polyvinyl alcohol quality 2 o 2 , keep the temperature at 60°C for reaction, and naturally cool to room temperature after the reaction to prepare modified polyvinyl alcohol glue.

[0027] Mix tapioca starch and 40% glyoxal solution with a mass concentration of 100:30 (g / ml), and add FeSO with a mass fraction of 3% tapioca starch 4 ·7H 2 O, first at 1000r·min -1 After stirring at a speed of 30 min, it was placed in a microwave oven for heating reaction, the microwave power was set to 500W, the reaction temperature was 60°C, and the reaction time was 45 min.

[0028] At normal temperature, the modified polyvin...

Embodiment 2

[0033]Add polyvinyl alcohol and water with a mass ratio of 1:5 into the reactor and soak for 11 hours, heat while stirring to keep the temperature constant at 93°C, dissolve for 90 minutes, cool naturally to about 60°C, and then add the mass fraction to be the mass of polyvinyl alcohol 0.5% Catalyst FeSO 4 ·7H 2 O, then slowly add the pure H with a mass fraction of 4.0% of the polyvinyl alcohol quality 2 o 2 , keep the temperature at 58°C for reaction, and naturally cool to room temperature after the reaction to prepare modified polyvinyl alcohol glue.

[0034] Mix tapioca starch and 40% glyoxal solution with a mass concentration of 100:30 (g / ml), and add FeSO with a mass fraction of 3% tapioca starch 4 ·7H 2 O, first at 1000r·min -1 After stirring at a speed of 30 min, it was placed in a microwave oven for heating reaction, the microwave power was set to 500W, the reaction temperature was 65°C, and the reaction time was 45 min.

[0035] At normal temperature, the modifi...

Embodiment 3

[0040] Add polyvinyl alcohol and water with a mass ratio of 1:6 into the reactor to soak for 10 hours, heat while stirring to keep the temperature constant at 96°C, dissolve for 90 minutes, cool naturally to about 60°C, and then add the mass fraction to be the mass of polyvinyl alcohol 0.4% Catalyst FeSO 4 ·7H 2 O, then slowly add the pure H whose mass fraction is 3.5% of the polyvinyl alcohol quality 2 o 2 , keep the temperature at 65°C for reaction, and naturally cool to room temperature after the reaction to prepare modified polyvinyl alcohol glue.

[0041] Mix tapioca starch and 40% glyoxal solution with a mass concentration of 100:30 (g / ml), and add FeSO with a mass fraction of 3% tapioca starch 4 ·7H 2 O, first at 1000r·min -1 After stirring at a speed of 30 min, it was placed in a microwave oven for heating reaction, the microwave power was set to 500W, the reaction temperature was 70°C, and the reaction time was 45 min.

[0042] At normal temperature, the modifie...

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Abstract

The invention discloses a preparation method of a cassava starch based biomass formaldehyde-free wood adhesive. The preparation method comprises that cassava starch and polyvinyl alcohol are taken as main raw materials of the formaldehyde-free wood adhesive and then are respectively modified, thus the cassava starch based biomass formaldehyde-free wood adhesive is obtained. The preparation methoddisclosed by the invention has the beneficial effects that: 1, the technical problem that biological glue has poor water resistance, low bonding strength and low solid content of starch glue is solved, and a production method for preparing the formaldehyde-free wood adhesive by taking the cassava starch as a base material is provided; and 2, artificial panel industry and cassava industry with resource superiority in Guangxi province are promoted to be developed and expanded, labour employment of hundreds of thousands of people in urban and rural areas can be solved, and harmonious developmentof national economy and society in China is promoted, thus the preparation method disclosed by the invention has wide application prospect.

Description

technical field [0001] The invention relates to the technical field of wood adhesives, in particular to a preparation method of cassava starch-based biomass formaldehyde-free wood adhesives. Background technique [0002] Since the 21st century, adhesives have shown their strong vigor and vitality, which are crucial to people's lives. They not only have a wide range of practicability, but also create considerable economic and social benefits. Due to the lack of core technology, the adhesives of wood-based panels produced in my country are still mainly "trialdehyde glue", which volatilizes harmful gas-formaldehyde, making the overall quality of my country's wood-based panels in the world's "E2 level" of the wood-based panel industry. end" level. Since high-performance and high-quality adhesives are high-tech products, although the market demand in our country is urgent, the technology is complicated and the development is difficult. The global high-end adhesives have been mono...

Claims

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Application Information

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IPC IPC(8): C09J129/04C09J103/04C09J125/14C08F16/06C08F8/06C08B31/00
Inventor 龙云飞黄尚继
Owner NANJING JIAYUAN CHEM
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