文献类型：期刊文献

中文题名：镁离子催化合成木质素-酚醛树脂的结构与固化特性

英文题名：Molecular Structure and Curing Characteristics of Lignin-phenol-formaldehyde Resin Prepared with the Use of Magnesian Ion as Catalyst

作者：杨昇[1] 王钧[2] 李改云[1] 范东斌[1]

第一作者：杨昇

机构：[1]中国林业科学研究院木材工业研究所;[2]山东省林业科学研究院

年份：2018

卷号：38

期号：4

起止页码：74-78

中文期刊名：林产化学与工业

外文期刊名：Chemistry and Industry of Forest Products

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD2017_2018】；

基金：国家林业公益性行业科研专项(201504602)

语种：中文

中文关键词：氧化镁;木质素;酚醛树脂;分子结构;固化

外文关键词：magnesium oxide;lignin;phenol-tormaldehyde resin;molecular structure;curing

分类号：TQ35

摘要：以纳米氧化镁(MgO)为催化剂,通过在酶解木质素(EHL)、苯酚、甲醛和NaO H反应的初期添加纳米MgO合成MgO催化的木质素-酚醛(MLPF)树脂。采用傅里叶红外光谱(FT-IR)、核磁共振(13C NMR)及差示扫描量热(DSC)技术手段表征MLPF树脂的分子结构与固化反应热行为,并与未添加MgO的对照样木质素-酚醛(LPF)树脂及酚醛(PF)树脂进行对比分析,研究Mg^(2+)对MLPF树脂结构与固化特性的影响,结果表明:Mg^(2+)有效促进了MLPF树脂中羟甲基基团形成,增加了分子结构中亚甲基连接结构数量,抑制了亚甲基醚键生成,使MLPF树脂结构的缩合程度高于LPF树脂;Mg^(2+)可以实现MLPF树脂快速固化,降低树脂的固化反应温度。
The narometer magnesium oxide （MgO） was used as catalysis for the preparation of lignin-phenol-formaldehyde （MLPF） resin. MgO was added in the initial stage of resin reaction. The molecular structure and thermal behavior of the curing reaction of MLPF resin were characterized by Fourier transform infrare spectroscopic （FT-IR）, 13 C nuclear magnetic resonance （ 13 C NMR） and different scanning calorimetry （DSC）, respectively. A comparisons to phenol-formaldehyde （PF） resin and lignin-phenol-formaldehyde（LPF） resin without adding MgO were also carried out to investigate the effects of Mg 2＋ on the structure and curing characteristics of MLPF resin. The research results indicated that Mg 2＋ could promote the formation of hydroxymethyl group, increase the amounts of methylene, restrict the formation of ether bond bridge during MLPF resin synthesis, and lead to the higher structure condensation degree of MLPF resin than that of LPF resin. MgO seemed to make MLPF resin cure faster and decrease its curing reaction temperature.