文献类型：期刊文献

英文题名：Preparation and characterization of novolak phenol formaldehyde resin from liquefied brown-rotted wood

作者：Li, Gai-Yun[1] Hse, Chung-Yun[2] Qin, Te-Fu[1]

第一作者：李改云

通信作者：Qin, TF[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]USDA Forest Serv, So Res Stn, Pineville, LA 71360 USA

年份：2012

卷号：125

期号：4

起止页码：3142-3147

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：20121915012384);Scopus(收录号：2-s2.0-84862822476);WOS:【SCI-EXPANDED(收录号:WOS:000303596200079)】；

基金：Contract grant sponsor: National High Technology Research and Development Program of China (National 863 Project); contract grant number: 2010AA101703.; Contract grant sponsor: Central Public-interest Scientific Institution Basal Research Fund; contract grant number: CAFYBB2010003-4.

语种：英文

外文关键词：brown-rotted wood; phenol liquefaction; novolak PF resin; molding

摘要：The brown-rotted wood was liquefied in phenol with phosphoric acid as catalyst and the resulting liquefied products were condensed with formaldehyde to yield novolak liquefied wood-based phenol formaldehyde resin (LWPF). The results showed that brown-rotted wood could be more easily liquefied than sound wood in phenol. The residue content of liquefied wood decreased continually with the progress of brown-rot decay. Both water wash and neutralization and water wash slightly improved the thermofluidity and curing properties of LWPF with a small reduction of LWPF yield. An increase in phenol to wood (P/W) ratio from 2 to 3 slightly improved the flow property of LWPF, but with an accompanied by 20% deduction in the product yield. Increased liquefaction time from 30 min to 60 min showed no significant influence on the resulting LWPF. The moldings fabricated from LWPF yielded higher charpy impact, flexural and flexural modulus strength but yielded lower temperature deflection under load than that of the commercial novolak resin. (C) 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012