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
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[0014] A preparation method of manganese dioxide-chitosan carbon-cellulose aerogel urea-formaldehyde resin glue additive includes the following steps:
[0015] (1) First, add cellulose to NaOH / urea / water solution at a solid-liquid weight ratio of 1:50 and stir to dissolve at -12°C to obtain a cellulose solution, then add chitosan equivalent to 1% by weight of the cellulose solution for grinding Disperse uniformly, adjust the temperature to 20°C and adjust the pH to 4 with an acetic acid solution, and stir evenly 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, hydrothermally react at 120°C for 12 hours, and cool Afterwards, the pH is adjusted to 6, then freeze-dried, and uniformly ground to obtain the urea-formaldehyde resin glue additive.
[0017] The weight ratio of NaOH, urea and water in the NaOH / urea / water solution is 3:5...
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