纳米结晶纤维素改善脲醛树脂胶黏剂游离甲醛的研究

doi:10.3969/j.issn.0253-2417.2016.01.014

Abstract

Abstract: In this study, a modified nanocrystalline cellulose (M-NCC) was used to reduce the free formaldehyde emission from urea-formaldehyde resin adhesive.M-NCC was prepared by a procedure that Russian larch pulp was hydrolyzed by acid, followed by the modification of 3-(2-aminoethyl)-aminopropylmethyldimethoxysilane (MCPS).The effects of M-NCC on the emission of free formaldehyde from urea-formaldehyde resin adhesive were analyzed.The results indicated that from the TEM images, the length of the nanocrystalline cellulase (NCC) particles prepared by acid hydrolysis was 100-200 nm, and the diameter was 20-30 nm.Compared with the original cellulose, the crystallinity degree of NCC was improved by 41.1%.The wetting property of M-NCC was enhanced by the graft of MCPS.The contact angle between M-NCC and urea-formaldehyde resin adhesive was decreased by 32.7% when the grafting ratio was 27.2%.The SEM images showed that the disperse state of M-NCC particles under low concentrations was improved significantly and the dispersity of nano-partides decreased obviously as the M-NCC was 2%.Free formaldehyde was absorbed by the M-NCC and 1.5% M-NCC led to a 50.9% decline of the emission of free formaldehyde.

Key words: nanocrystalline cellulose, modification, urea-formaldehyde resin, free formaldehyde

CLC Number:

TQ35
TS727

ZHANG Hao, PU Jun-wen, HONG Liang, ZHU Ming. Reduction of Free Formaldehyde Emission from Urea-formaldehyde Resin Adhesive by Use of Modified Nanocrystalline Cellulose[J]. Chemistry and Industry of Forest Products, 2016, 36(1): 99-104.

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Reduction of Free Formaldehyde Emission from Urea-formaldehyde Resin Adhesive by Use of Modified Nanocrystalline Cellulose

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