羟甲基化秸秆乙醇残渣脲醛复合树脂的制备与应用性能

doi:10.3969/j.issn.0253-2417.2015.06.004

Abstract

Abstract: The hydroxymethylated straw ethanol residue(HER) was prepared from the hydroxymethylation of straw ethanol residue(ER).HER and urea-formaldehyde resin (UF) were then blended to fabricate the HER/UF and the preparation conditions were studied.Lignin in ER and HER were characterized by FT-IR and the dispersibilities of ER and HER in UF were analyzed by SEM.The results showed that the content of hydroxymethyl group in HER was more than that in ER.The increment of hydroxymethyl group in HER decreased with the ER dosage(the mass ratio of ER to formaldehyde) increasing.And HER showed better dispersity compared with ER in the UF resin.The HER prepared under the conditions of 2 000% ER dosage and 0.9% NaOH dosage(the mass ratio of NaOH to HER) had the best performance.Its free formaldehyde was 0.24% and the viscosity was 3 200 mPa·s.When 10%-40% UF resin was replaced by HER, formaldehyde emission of the three-ply boards could meet E₀ grade and its bonding strength could meet the requirement of type Ⅱ plywood.And the three-ply board that made by 30% HER/UF had the best performance.

Key words: straw ethanol residue, hydroxymethylation, urea-formaldehyde resin, composite resin

CLC Number:

TQ35
TQ433.3

HU Lan-fang, GAO Shi-shuai, ZHAO Lin-wu, WANG Chun-peng, CHU Fu-xiang. Preparation and Performance of Hydroxymethylated Straw Ethanol Residue/Urea-formaldehyde Composite Resin[J]. Chemistry and Industry of Forest Products, 2015, 35(6): 21-26.

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Preparation and Performance of Hydroxymethylated Straw Ethanol Residue/Urea-formaldehyde Composite Resin

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