Preparation method of adhesive for recombined material

A technology of adhesives and recombined materials, applied in the direction of adhesives, adhesive types, starch adhesives, etc., can solve the problems of insufficient environmental protection, poor toughness, and low formaldehyde emission, and achieve less volatile organic compounds and high environmental protection Sexuality, good toughening effect

Active Publication Date: 2017-01-18
DEHUA TB NEW DECORATION MATERIAL CO LTD
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Problems solved by technology

Patent CN104152088B discloses a nano-alumina modified phenolic resin adhesive and its preparation method and application. Although the adhesive prepared by the preparation method is used in wood processing, it has the advantages of fast curing speed, high bonding strength, and low formaldehyde emission. However, the adhesive still cannot avoid the use of formaldehyde, the environmental protection is not high enough, and the problem of poor toughness of the recombined wood cannot be solved.
Patent CN103878833A discloses a manufacturing method of recombined bamboo decorative veneer. The adhesive used is a mixture of urea-formaldehyde resin, modified starch emulsion and polyvinyl acetate emulsion. Although it has the effect of reducing costs, it still cannot solve the problem of recombined bamboo veneer. The problem of insufficient environmental protection and poor toughness

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  • Preparation method of adhesive for recombined material

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Embodiment 1

[0032]a. Preparation of modified micro-nano cellulose: the wood or straw fiber from which lignin and hemicellulose has been removed is stirred and reacted at 60°C for 2 hours with an acid solution with a mass fraction of 45% to form a cellulose slurry, and then the Add water to the cellulose slurry to adjust the concentration to 1.8%, then pretreat the cellulose slurry at 8°C, ultrasonic power 650W, and ultrasonic frequency 20kHz for 40min at low temperature, and then press the cellulose slurry under a pressure of 100MPa Homogeneous circulation 6 times, then add water to the cellulose slurry to adjust the concentration to 1.5%, then add 2% of the mass of the cellulose slurry silane coupling agent and at 40 ° C, nitrogen at an air flow rate of 18ml / min After deoxygenation for 7 minutes, an in-situ ultrasonic reaction was performed at an ultrasonic power of 750W and an ultrasonic frequency of 20kHz for 18 minutes to obtain the modified micro-nanocellulose; the silane coupling ag...

Embodiment 2

[0039] a. Preparation of modified micro-nano cellulose: the wood or straw fiber from which lignin and hemicellulose has been removed is stirred and reacted at 40°C for 3 hours with an acid solution with a mass fraction of 30% to form a cellulose slurry, and then the Add water to the cellulose slurry to adjust the concentration to 1.5%, then pretreat the cellulose slurry with low-temperature ultrasonic pretreatment at 10°C, ultrasonic power 1000W, and ultrasonic frequency 22kHz for 60min, and then press the cellulose slurry under a pressure of 120MPa Homogeneous circulation 7 times, then add water to the cellulose slurry to adjust the concentration to 1%, then add 2% silane coupling agent of the mass of the cellulose slurry and heat at 40°C, nitrogen at an airflow rate of 30ml / min After deoxygenation for 3 minutes, an in-situ ultrasonic reaction was carried out at an ultrasonic power of 900W and an ultrasonic frequency of 18kHz for 20 minutes to obtain the modified micro-nanoce...

Embodiment 3

[0046] a. Preparation of modified micro-nano cellulose: the wood or straw fiber from which lignin and hemicellulose has been removed is stirred and reacted at 80°C for 1 hour with an acid solution with a mass fraction of 60% to form a cellulose slurry, and then the Add water to the cellulose slurry to adjust the concentration to 1.8%, then pretreat the cellulose slurry with low-temperature ultrasonic at 5°C, ultrasonic power 1000W, and ultrasonic frequency 22kHz for 30min, and then press the cellulose slurry under a pressure of 150MPa Homogeneous circulation 2 times, then add water to the cellulose slurry to adjust the concentration to 2%, then add 3% of the mass of the cellulose slurry silane coupling agent and at 30 ° C, nitrogen at an air flow rate of 5ml / min After deoxygenation for 10 minutes, an in-situ ultrasonic reaction was carried out at an ultrasonic power of 600W and an ultrasonic frequency of 22kHz for 30 minutes to obtain the modified micro-nanocellulose; the sila...

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Abstract

The invention relates to a preparation method of an adhesive for a recombined material. The preparation method comprises the following steps: preparing modified micro-nano cellulose, preparing aqueous polymer, preparing biomass composite emulsion, preparing a main agent, preparing a stress type crosslinking agent and preparing the adhesive, wherein the micro-nano cellulose is prepared by performing acid treatment, low-temperature ultrasonic pretreatment, high-pressure homogenization treatment and surface modification on wood or straw fibers which lignin and hemicelluloses are removed from; and the biomass composite emulsion is prepared by performing vegetable protein modification and active monomer grafting on soybean powder. According to the preparation method provided by the invention, formaldehyde is not added, so high environmentally-friendly property is achieved; the synergistically toughening effect of the biomass composite emulsion and the modified micro-nano cellulose is exerted, so that the prepared adhesive for the recombined material has a good toughening effect. The adhesive prepared by the method is very suitable for adhesion of the recombined material and effectively solves the problems that the existing recombined material has low environmentally-friendly property and low toughness.

Description

technical field [0001] The invention relates to a method for preparing an adhesive, in particular to a method for preparing an adhesive for recombined wood. Background technique [0002] Recombined wood (commonly known as "technical wood" in the industry) is an artificial veneer made from ordinary wood with adhesives and certain processing procedures. During the manufacturing process of recombined wood, the microstructure and inherent properties of wood are not destroyed, and all natural properties of natural wood such as heat insulation, insulation, temperature regulation, and humidity regulation are completely preserved, and many natural defects of artificial fast-growing wood are overcome. high value utilization. In the past 30 years, R&D personnel have carried out a lot of research and industrialization development mainly around the manufacturing equipment of heavy wood and the functionalization of products. Recombined wood has expanded from the initial single decorati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J151/00C09J129/04C09J103/02C09J11/08
CPCC08L2205/035C09J11/08C09J151/00C08L29/04C08L3/02C08L1/02C08L71/02C08L71/00
Inventor 杨勇唐周梅沈煜燕杜波方宝金陈鸣
Owner DEHUA TB NEW DECORATION MATERIAL CO LTD
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