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A kind of catalytic liquefaction composite adhesive of bamboo chips and preparation method thereof

A composite adhesive and catalytic liquefaction technology, which is applied in the direction of adhesive types, adhesive additives, wood fiber material adhesives, etc., can solve the problems affecting the promotion and application of adhesives, affecting the availability of liquefied products, increasing the production cost of adhesives, etc. problems, achieve good environmental and economic benefits, reduce production costs, and reduce formaldehyde release

Active Publication Date: 2021-05-14
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the growth cycle of wood itself is long, the degree of polymerization of wood fiber is high, it is difficult to decompose, and the requirements for liquefaction are relatively high. cost, and caused serious environmental pollution, affecting the promotion and application of such adhesives
[0006] During the liquefaction process of wood, polycondensation will continue to occur in the liquefied product, and this phenomenon will become more obvious in the late stage of liquefaction, which will seriously affect the availability of the liquefied product and thus affect the filling efficiency

Method used

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  • A kind of catalytic liquefaction composite adhesive of bamboo chips and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of bamboo chip catalytic liquefaction composite adhesive is prepared by the following components in parts by weight: 100 parts of bamboo chip powder, 50 parts of chrome-containing leather chips, 25 parts of solubilizer (polypropylene glycol 4000), 5 parts of formaldehyde, 20 parts of Diluent (gelatinized starch with 20% starch content). Among them, the water content of the bamboo powder is 6-8% and the particle size is 0.2-0.5 mm, which is obtained by soaking the processing residues from bamboo trunks, bamboo branches, bamboo nodes or bamboo leaves with 1-2% hydrochloric acid solution for 2 hours. obtained by filtering. The chrome leather shavings are cowhide chrome tanned and smoothed leather shavings with a water content of 50-55% and a content of 3.0-3.5% of chromium trioxide.

[0028] The preparation method of above-mentioned composite adhesive is specifically as follows:

[0029] Add bamboo powder, chrome-containing leather chips, and solubilizer to the dr...

Embodiment 2

[0031] A kind of bamboo chip catalytic liquefaction composite adhesive is prepared by comprising the following components in parts by weight: 130 parts of bamboo chip powder, 70 parts of chrome-containing leather chips, 30 parts of solubilizer (polypropylene glycol 6000), 5 parts of formaldehyde, 20 parts Part diluent (gelatinized starch with a starch content of 30%). Among them, the water content of the bamboo powder is 6%-8% and the particle size is 0.2-0.5mm, which is obtained by impregnating the processing residues from bamboo trunks, bamboo branches, bamboo nodes or bamboo leaves with 1%-2% hydrochloric acid solution Obtained by filtration after 2h. The chrome leather shavings are cowhide chrome tanned and smoothed leather shavings with a water content of 50-55% and a content of 3.0-3.5% of chromium trioxide.

[0032] The preparation method of above-mentioned composite adhesive is specifically as follows:

[0033] Add bamboo powder, chrome-containing leather chips, and ...

Embodiment 3

[0035]A kind of bamboo chip catalytic liquefaction composite adhesive is prepared by comprising the following components in parts by weight: 150 parts of bamboo chip powder, 70 parts of chrome-containing leather chips, 50 parts of solubilizer (polypropylene glycol 10000), 10 parts of formaldehyde, 30 parts Part diluent (starch content is the gelatinized starch of 30%) wherein, the water content of bamboo powder is 6~8% and particle diameter is 0.2~0.5mm, and it is obtained by coming from bamboo stem, bamboo branch, bamboo joint or bamboo leaf It is obtained by immersing the processing residue with 1-2% hydrochloric acid solution for 2 hours and then filtering. The chrome leather shavings are cowhide chrome tanned and smoothed leather shavings with a water content of 50-55% and a content of 3.0-3.5% of chromium trioxide.

[0036] The preparation method of above-mentioned composite adhesive is specifically as follows:

[0037] Add bamboo powder, chrome-containing leather chips,...

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Abstract

The invention discloses a composite adhesive for catalytic liquefaction of bamboo chips and a preparation method thereof. Pretreated bamboo powder uses leather chips as a catalyst, and an aldehyde cross-linking agent is used to form crosslinks between hydroxyl groups of liquefied bamboo powder and protein molecules in leather chips. Combined with solvent solubilization and plasticization, and adding gelatinized starch to obtain a composite adhesive. The composite adhesive is bonded to wood plywood, and the performance test of the plywood is carried out in accordance with GB / T 14074‑2006 "Testing Methods for Wood Adhesives and Their Resins", reaching the standard for Class II plywood in GB / T 9846‑2015 "Ordinary Plywood". The composite adhesive of the invention has low preparation cost, is convenient to use, and can make full use of waste.

Description

technical field [0001] The invention relates to a composite adhesive, in particular to a bamboo chip catalyzed liquefaction composite adhesive and a preparation method thereof. Background technique [0002] Adhesives can connect homogeneous or heterogeneous materials together through adhesion and cohesion under certain conditions, and their use is not limited by material types and geometric shapes. Adhesives have incomparable applicability in connection methods such as riveting, welding and screwing, which can save the use of rivets and bolts, and play a role in bonding, sealing (better water tightness and air tightness) and anticorrosion on key parts, and The bonding part is light in weight, which can effectively reduce the product quality, the stress distribution of the part is even, has good fatigue resistance and durability, and the bonding operation is simple and cost-effective. As a result, adhesives are widely used in industries such as construction, leather, automot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J197/02C09J11/04C09J11/08
CPCC08K2003/2251C08L2205/035C09J11/04C09J11/08C09J197/02C08L71/02C08L3/02C08L89/00C08K3/22
Inventor 戴睿张一炜单志华陈慧
Owner SICHUAN UNIV
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