| C NMR 定量分析 |
| |
| 引用本文： | 蒋玉凤,张伟,赵临五,张明明,王春鹏.C NMR 定量分析[J].林产化学与工业,2012,32(2):135-139. |
| |
| 作者姓名： | 蒋玉凤 张伟 赵临五 张明明 王春鹏 |
| |
| 作者单位： | 1. 中国林业科学研究院 林产化学工业研究所;生物质化学利用国家工程实验室;国家林业局 林产化学工程重点开放性实验室;江苏省生物质能源与材料重点实验室, 江苏 南京 210042;;2. 南京工业大学 理学院, 江苏 南京 210042 |
| |
| 基金项目： | 浙江省省院合作林业科技项目(2009SY01) |
| |
| 摘 要： | 按酚醛(PF)树脂的制备工艺,采用CaO和NaOH为复合催化剂,在碱性条件下制备了95%～200%的系列尿素改性酚醛(PUF)树脂,贮存期达30 d以上。该系列PUF树脂压制的杨木三合板,胶合强度符合Ⅱ类胶合板要求,甲醛释放量<0.5 mg/L,符合E0级。其中选用尿素/苯酚(U/P)质量比为1.5∶1,甲醛与尿素-苯酚(F/(U+P))物质的量的比值为0.97的配方制胶,结合13C NMR分析手段,监控投料甲醛在反应过程中形成的亚甲基、羟甲基和亚甲基醚键的含量变化,以及最终PUF树脂的亚甲基(32.4%)、羟甲基(57%)和亚甲基醚键(10%)的结构比例。
|
| 关 键 词： | PUF树脂 Ⅱ类胶合板 E0级 低甲醛释放量 |
Synthesis and the Quantitative 13C NMR Analysis of PUF Resin for E0-Ⅱ-type Plywood |
| |
| JIANG Yu-feng,ZHANG Wei,ZHAO Lin-wu,ZHANG Ming-ming,WANG Chun-peng.Synthesis and the Quantitative 13C NMR Analysis of PUF Resin for E0-Ⅱ-type Plywood[J].Chemistry & Industry of Forest Products,2012,32(2):135-139. |
| |
| Authors: | JIANG Yu-feng ZHANG Wei ZHAO Lin-wu ZHANG Ming-ming WANG Chun-peng |
| |
| Institution: | 1(1.Institute of Chemical Industry of Forest Products,CAF;National Engineering Lab.for Biomass Chemical Utilization;Key and Open Lab.of Forest Chemical Engineering,SFA;Key Lab.of Biomass Energy and Material,Jiangsu Province, Nanjing 210042,China;2.College of science,Nanjing University of technology,Nanjing 210042,China) |
| |
| Abstract: | The phenol-urea-formaldehyde(PUF) resins with 95%-200% urea(base in phenol weight) were synthesized in alkaline condition by using CaO and NaOH as catalyst.It had long storage life(>30 d).These PUF resins were used to produce the plywood that meet the requirement of type Ⅱ by measuring the bond strength.The formaldehyde emission of the PUF resin bonded poplar plywood was less than 0.5 mg/L,which was regarded as E0 degree.PUF resin was synthesized in the conduction of urea/phenol(U/P) mass ratio 1.5 ∶ 1 and formaldehyde and urea-phenol(F/(U+P)) molar ratio 0.97.The contents of methylene,hydroxymethyl and methylene-ether bonds which transformed from formaldehyde molecule,were quantitatively examined by the 13 C NMR spectroscopy.The relationships between the formaldehyde emission and the bond strength of the PUF resin bonded poplar plywood were explained by the analysis of the contents of methylene(32.4%),hydroxymethyl(57%) and methylene-ether(10 %) bonds. |
| |
| Keywords: | PUF resin type Ⅱ plywood E0 degree low formaldehyde emission |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《林产化学与工业》浏览原始摘要信息 |
|
