Aldehyde-free low-cost polysaccharide adhesive and preparation method thereof
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A low-cost polysaccharide glue technology, applied in polysaccharide adhesives, adhesives, adhesive additives, etc., can solve the problems of poor water resistance and bonding performance, and achieve the effects of enhancing bonding performance, balancing internal stress, and reducing particle size distribution
Active Publication Date: 2019-11-12
BEIJING FORESTRY UNIVERSITY
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[0003] As people pay more attention to the health of the living environment, the use of biomass adhesives to fundamentally solve the problem of free formaldehyde release from wood-b
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[0054] A preparation method of an aldehyde-free low-cost polysaccharide adhesive, characterized in that, the steps are as follows:
[0055] (1) each component is weighed according to weight ratio, the nanofiber of grafted methylol melamine is mixed with dispersion medium water, and ultrasonic dispersion is carried out for 15 minutes;
[0056](2) hyperbranched aminopolysaccharide is added in the solution of above-mentioned (1), mixed solution is passed through high pressure homogenizer, under 70MPa pressure, carry out homogenization for 15 minutes;
[0057] (3) Add the multifunctional epoxy compound and polyacrylamide successively to the mixture obtained in step (2), and stir evenly.
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[0058] Example 1
[0059] The present embodiment provides a preparation method of a polysaccharide adhesive, and the adhesive is prepared according to the following weight ratios:
[0060] Hyperbranched Glycosan 20 kg
[0061] Multifunctional epoxy compound 6 kg
[0062] Nanofibers grafted with methylol melamine 1 kg
[0063] Polyacrylamide 1 kg
[0064] This embodiment also provides the preparation method of the above-mentioned adhesive, and the specific preparation steps are the same as the above-mentioned preparation method.
Example Embodiment
[0065] Example 2
[0066] The present embodiment provides a preparation method of a polysaccharide adhesive, and the adhesive is prepared according to the following weight ratios:
[0067] Hyperbranched Glycosan 25 kg
[0068] Multifunctional epoxy compound 16 kg
[0069] Nanofibers grafted with methylol melamine 2 kg
[0070] Polyacrylamide 3 kg
[0071] The preparation method of the adhesive described in this example is the same as that in Example 1.
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Abstract
The invention discloses an aldehyde-free low-cost polysaccharide adhesive and a preparation method thereof. The aldehyde-free low-cost polysaccharide adhesive is prepared from the following componentsin parts by weight: 20-25 parts of a main agent, 55-60 parts of dispersed medium water, 6-16 parts of a crosslinking agent, 1-2 parts of a reinforcing agent and 1-3 parts of a viscosity regulator. The preparation method of the polysaccharide-based adhesive comprises the following steps: firstly, all the components are weighed according to the weight ratio, the reinforcing agent and the dispersedmedium water are mixed, and ultrasonic dispersion is conducted for 15 minutes; then, the main agent is added into a prepared solution, and a mixed solution is homogenized for 15 minutes under the pressure of 70 MPa through a high-pressure homogenizer; and finally, the crosslinking agent and the viscosity regulator are added into a mixture obtained in the second step successively, and even stirringis conducted. The adhesive prepared through the simple preparation method has the advantages of high crosslinking density, good water-resistance performance, high dry and wet strength, adjustable viscosity, low curing temperature and the like, the practical requirements for a plywood adhesive are met, the production cost is low, the preparation process is simple, large-scale mass production can be conducted, and development of the environment-friendly high-performance adhesive industry is promoted advantageously.
Description
technical field [0001] The invention relates to the field of plywood preparation, in particular to an aldehyde-free and low-cost polysaccharide adhesive and a preparation method thereof. Background technique [0002] my country's wood-based panel production accounts for half of the world's total output, and it is the main source of furniture, flooring, and interior decoration materials. Every year, my country's plywood manufacturing consumes about 18 million tons of urea-formaldehyde resin and its modified product adhesives (solid content 50%), accounting for over 90% of the total output. Urea-formaldehyde resin adhesives have the problem of formaldehyde release from products. [0003] As people pay more attention to the health of the living environment, the use of biomass adhesives to fundamentally solve the problem of free formaldehyde release from wood-based panels has attracted much attention. However, most biomass adhesives have the problem of poor water resistance and ...
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