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Preparation method of MnO2/chitosan carbon/cellulose aerogel urea-formaldehyde resin adhesive additive

An airgel urea-formaldehyde resin and manganese dioxide technology, applied in the direction of cellulose adhesives, adhesive additives, chitin adhesives, etc., can solve the problems of formaldehyde instability, threat, difficult to remove, and decompose formaldehyde. Achieve high practical value, control formaldehyde release, and protect human health

Inactive Publication Date: 2017-10-24
佳诺威集团股份有限公司
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Problems solved by technology

However, it is difficult to remove and decompose formaldehyde only by adsorption method. The adsorbed formaldehyde is unstable and may be released again at any time, posing a potential threat to the human body.

Method used

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Embodiment Construction

[0014] A kind of preparation method of manganese dioxide-chitosan carbon-cellulose airgel urea-formaldehyde resin glue additive, comprises the following steps:

[0015] (1) First add cellulose to NaOH / urea / water solution at a solid-to-liquid weight ratio of 1:50 and stir and dissolve at -12°C to obtain a cellulose solution, then add chitosan equivalent to 1% of the weight of the cellulose solution for grinding Disperse evenly, adjust the temperature to 20°C and adjust the pH to 4 with acetic acid solution, and stir to obtain a chitosan-cellulose mixed sol;

[0016] (2) Mix the chitosan-cellulose mixed sol described in step (1) with the potassium permanganate solution at a volume ratio of 1:0.5, then adjust the pH to 9, react hydrothermally at 120°C for 12 hours, and cool Finally, adjust the pH to 6, then freeze-dry, and grind evenly to obtain the urea-formaldehyde resin additive.

[0017] The weight ratio of NaOH, urea and water in the NaOH / urea / water solution is 3:5:40.

[...

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Abstract

The invention discloses a preparation method of a MnO2 / chitosan carbon / cellulose aerogel urea-formaldehyde resin adhesive additive. The preparation method includes the steps of: 1) dissolving cellulose in a NaOH / urea / water solution to form a cellulose solution; 2) adding chitosan, blending the mixture, and regulating the pH value to acidity to obtain chitosan-cellulose mixture sol; 3) mixing the chitosan-cellulose mixture sol with a potassium permanganate solution, performing hydrothermal treatment to convert the chitosan in the sol system into chitosan carbon, and meanwhile uniformly supporting MnO2 on the chitosan carbon-cellulose sol system; 4) finally performing freeze-drying to obtain the MnO2 / chitosan carbon / cellulose aerogel urea-formaldehyde resin adhesive additive. The urea-formaldehyde resin adhesive additive can comprehensively and completely treat the indoor release of formaldehyde in the urea-formaldehyde resin adhesive by means of high-effective adsorption and high-effective decomposition to formaldehyde, thereby protecting body health. The additive has excellent practical value.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a method for preparing a manganese dioxide-chitosan carbon-cellulose airgel urea-formaldehyde resin additive. Background technique [0002] Urea-formaldehyde resin glue is a thermosetting polymer adhesive synthesized by polycondensation reaction with urea and formaldehyde as raw materials. It is widely used in particleboard, plywood, fiberboard and other wood processing industries. Due to the presence of free formaldehyde in urea-formaldehyde resin glue, it will be continuously released during the processing and use of the board, irritating people's eyes and respiratory system, and endangering people's health and the safety of the living environment. At present, the treatment methods of urea-formaldehyde resin glue formaldehyde mainly include adsorption, catalytic oxidation and plant filtration. The most commonly used method is the adsorption method, that is, the rel...

Claims

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Application Information

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IPC IPC(8): C09J161/24C09J105/08C09J101/02C09J11/04C09J11/08C08B37/08C08J9/28
Inventor 姜志强梁殿伟孙恒利卢亚洲
Owner 佳诺威集团股份有限公司
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