乙二醛-尿素-甲醛共缩聚树脂的合成、性能及反应机理研究

项目名称： 乙二醛-尿素-甲醛共缩聚树脂的合成、性能及反应机理研究

项目编号： No.31260160

项目类型： 地区科学基金项目

立项/批准年度： 2013

项目学科： 农业科学

项目作者： 邓书端

作者单位： 西南林业大学

项目金额： 50万元

中文摘要： 本课题选用无毒、低挥发的乙二醛(G)部分或全部替代甲醛(F)合成乙二醛-尿素-甲醛共缩聚树脂(GUF)和乙二醛-尿素树脂（GU），旨在从根本上降低或消除木材胶合制品的甲醛释放对环境和人体健康的危害。研究反应物料摩尔比、反应pH值、反应温度、反应时间、催化剂等合成条件对树脂结构和性能的影响规律，确定树脂最佳的合成工艺条件；主要采用核磁共振碳谱（13CNMR）、基质辅助激光解吸电离飞行时间质谱（MALDI-TOF-MS）及傅里叶变换红外光谱（FTIR）等方法研究树脂的结构及分子量分布情况，并结合树脂性能的分析结果阐明树脂的合成-结构-性能的关系；用量子化学方法计算树脂的合成反应及结构形成机理，并与实验测定结果相比较，提出树脂的合成反应机理。为乙二醛-尿素-甲醛共缩聚树脂(GUF)及乙二醛-尿素树脂(GU)在木材胶黏剂领域的应用提供理论依据;探索木材工业中用其它环保型树脂替代脲醛树脂的可行性。

中文关键词： 乙二醛-尿素-甲醛共缩聚树脂；乙二醛-尿素树脂；合成；性能；反应机理

英文摘要： In order to decrease or eliminate fundamentally the harm of formaldehyde to environment and human health, in this project, the low volatile and nontoxic aldehyde, glyoxyal (G) was chosen to substitute for formaldehyde (F) to react with urea (U) to prepare glyoxal-urea-formaldehyde cocondensed resin (GUF) and glyoxal-urea resin (GU) for interior wood panels. Firstly, the optimal synthesis conditions will be determined after investigating the effects of various kinds of synthesis conditions on the resins' structure formation process and properties, including the mole ratios of material, reactive pH values, reactive time, reactive temperatures and catalysts. Secondly, the structure and molecular weight distribution of the resins are investigated mainly by nuclear resonance carbon-13 spectrum (13CNMR), matrix assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOF-MS) and fourier transform infrared spectroscopy (FTIR) metods, and coupling with the resins' property, so as to elucidate the synthesis-structure-property relationship of GUF and GU resins. Then, the synthesis reaction and structure formation mechanism are studied by quantum chemical calculations, compared with the experimental results to put forward the reasonable synthesis reaction mechanism. The objective is to provide the the

英文关键词： glyoxal-urea-formaldehyde condensed resin；glyoxal-urea resin；synthesis；property；reaction mechanism