欢迎访问《林产化学与工业》,

林产化学与工业 ›› 2018, Vol. 38 ›› Issue (4): 74-78.doi: 10.3969/j.issn.0253-2417.2018.04.012

• 研究报告 • 上一篇    下一篇

镁离子催化合成木质素-酚醛树脂的结构与固化特性

杨昇1, 王钧2, 李改云1, 范东斌1   

  1. 1. 中国林业科学研究院 木材工业研究所, 北京 100091;
    2. 山东省林业科学研究院, 山东 济南 250014
  • 收稿日期:2018-01-23 出版日期:2018-08-25 发布日期:2018-08-10
  • 通讯作者: 范东斌,硕士生导师,研究领域为生物质胶黏剂;E-mail:fandongbin8@163.com。 E-mail:fandongbin8@163.com
  • 作者简介:杨昇(1989-),男,内蒙古乌兰察布人,助理研究员,博士,从事木质素高值化利用研究
  • 基金资助:
    国家林业公益性行业科研专项(201504602)

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

YANG Sheng1, WANG Jun2, LI Gaiyun1, FAN Dongbin1   

  1. 1. Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China;
    2. Shandong Academy of Forestry, Jinan 250014, China
  • Received:2018-01-23 Online:2018-08-25 Published:2018-08-10

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NaOH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Mg2+对MLPF树脂结构与固化特性的影响,结果表明:Mg2+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;Mg2+可以实现MLPF树脂快速固化,降低树脂的固化反应温度。

关键词: 氧化镁, 木质素, 酚醛树脂, 分子结构, 固化

Abstract: 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), 13C nuclear magnetic resonance (13C 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 Mg2+ on the structure and curing characteristics of MLPF resin. The research results indicated that Mg2+ 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.

Key words: magnesium oxide, lignin, phenol-formaldehyde resin, molecular structure, curing

中图分类号: