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

林产化学与工业 ›› 2016, Vol. 36 ›› Issue (1): 99-104.doi: 10.3969/j.issn.0253-2417.2016.01.014

纳米结晶纤维素改善脲醛树脂胶黏剂游离甲醛的研究

张浩¹, 蒲俊文², 洪亮¹, 朱明¹

1. 河南工程学院材料与化学工程学院, 河南郑州 450000;
2. 北京林业大学材料科学与技术学院, 北京 100083

收稿日期:2014-12-24 出版日期:2016-02-25 发布日期:2016-03-18
作者简介:张浩(1986-),男,河南郑州人,讲师,博士,研究方向为功能型纤维素复合材料;E-mail:zhanghaobjfu@126.com。
基金资助:
河南工程学院轻化工程技术研究中心建设项目(GCZX2013003);河南省高等学校重点科研项目(15A430019)

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

ZHANG Hao¹, PU Jun-wen², HONG Liang¹, ZHU Ming¹

1. Department of Material and Chemical Engineering, Henan Institute of Engineering, Zhengzhou 450000, China;
2. College of Material Science and Technology, Beijing Forestry University, Beijing 100083, China

Received:2014-12-24 Online:2016-02-25 Published:2016-03-18

摘要/Abstract

摘要： 为了降低脲醛树脂胶黏剂的游离甲醛释放量,以俄罗斯落叶松浆粕为原料,利用酸水解,硅烷偶联剂改性等制备获得表面改性纳米结晶纤维素(M-NCC),并将M-NCC作为吸附材料用于脲醛树脂基材制备胶合板,研究M-NCC对脲醛树脂胶黏剂游离甲醛的吸附效果和机理。结果表明:透射电镜(TEM)检测可知,制备的NCC颗粒长度约为100~200 nm、直径约为20~30 nm,结晶度为57.3%,相比原始纤维素提高了41.1%;硅烷偶联剂3-(2-氨乙基)-氨丙基甲基二甲氧基硅烷(MCPS)使NCC的浸润性显著增强,当MCPS用量为8%时M-NCC接枝率达到27.2%,M-NCC对脲醛树脂的接触角为65.7°,下降32.7%;由扫描电镜(SEM)照片可观测到,表面改性显著改善了低浓度NCC颗粒在脲醛树脂基材中的分散状态,当M-NCC质量分数2%时,纳米颗粒的分散性能明显下降;M-NCC可有效吸附脲醛树脂基材中的游离甲醛,当M-NCC质量分数1.5%时可致游离甲醛比对照组(0.51 mg/L)下降50.9%。

关键词: 纳米结晶纤维素, 改性, 脲醛树脂, 游离甲醛

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

中图分类号:

TQ35
TS727

张浩, 蒲俊文, 洪亮, 朱明. 纳米结晶纤维素改善脲醛树脂胶黏剂游离甲醛的研究[J]. 林产化学与工业, 2016, 36(1): 99-104.

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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纳米结晶纤维素改善脲醛树脂胶黏剂游离甲醛的研究

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

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