文献类型：期刊文献

英文题名：Preparation and Characterization of Phenol-Formaldehyde Resins Modified with Alkaline Rice Straw Lignin

作者：El Mansouri, Nour-Eddine[2,3];Yuan, Qiaolong[1];Huang, Farong[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tec, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Sultan Moulay Slimane Univ USMS, Fac Sci & Tech, Lab Biol Engn, BP 523, Mghila 23000, Beni Mellal, Morocco;[3]USMS, Dept Chem, Polydisciplinary Fac, BP 592, Mghila 23000, Beni Mellal, Morocco

年份：2018

卷号：13

期号：4

起止页码：8061

外文期刊名：BIORESOURCES

收录：;EI(收录号：20210509843438);WOS:【SCI-EXPANDED(收录号:WOS:000454215100065)】；

基金：Authors wish to thank the Commission for Universities and Research of the DIUiE of the Generalitat of Catalonia and the company Henkel KgaA for support of this project.

语种：英文

外文关键词：Adhesives; Hydroxymethylation; Lignin; Phenol formaldehyde; Wood panels

摘要：Phenol-formaldehyde (PF) is a thermosetting resin that is widely used in many fields. One of its important applications is as an adhesive for wood-based panels manufacturing. In this research work, modified phenolformaldehyde resins were prepared using hydroxymethylated alkaline rice straw lignin as a substitute for petroleum-based phenol in the range of 20 to 50% by weight. The molar ratios of sodium hydroxide to phenol-modified alkaline lignin and the formaldehyde to phenol-modified alkaline lignin were from 1.0 to 1.4, and 1.8 to 2.6, respectively. The parameters used to characterize the modified phenol-formaldehyde resins were: free-formaldehyde, gel time, viscosity, pH, and solid content. The structural differences and similarities between the prepared resins were determined by FTIR spectroscopy. Results obtained were discussed according to the requirements for adhesives utilization in plywood manufacture, and the optimum operating conditions were selected. Infrared spectra of lignin-based phenol formaldehyde (LPF) resins showed structural similarity with that of PF resin.