文献类型：期刊文献

中文题名：木材液化产物制备热塑性树脂的研究

英文题名：Preparation of Novolak-type Phenolic Resin from Phenolated Wood

作者：李改云[1] 任海青[1] 秦特夫[1] 江泽慧[1]

第一作者：李改云

机构：[1]中国林业科学研究院木材工业研究所

年份：2008

卷号：28

期号：4

起止页码：7-12

中文期刊名：林产化学与工业

外文期刊名：Chemistry and Industry of Forest Products

收录：CSTPCD;;Scopus;CSCD:【CSCD_E2011_2012】；

基金：国家林业局林业科学技术推广项目((2006)长江-1号;(2005)91号);"十一五"国家林业科技支撑计划(2006BAD18B1002;2006BAD03A16;2006BAD03A15)

语种：中文

中文关键词：木材;液化;热塑性树脂;酚醛树脂

外文关键词：wood; liquefaction ; novolak-type resin; phenol-formaldehyde resin

分类号：TQ351;S785

摘要：在酸性催化剂作用下,用木材的苯酚液化产物和甲醛进一步树脂化制备了液化木基热塑性酚醛树脂(PWF)。用正交试验方法研究了各影响因素对树脂产率和软化点的影响,结果表明,pH值和反应温度对PWF树脂产率的影响最大,而甲醛与苯酚的投料比对PWF树脂软化点的影响最大。当木材液化产物中残留的苯酚与甲醛的物质的量之比为1∶0.75,pH值为木材液化产物的实际值,在105℃反应150min时,液化木基热塑性酚醛树脂的产率达到124%,软化点为110℃左右。用凝胶渗透色谱(GPC)、傅立叶红外光谱(FT-IR)和核磁共振(NMR)对比研究了PWF和传统热塑性酚醛树脂(PF)的结构特征。结果显示PWF和PF的结构基本相似,酚单元之间的连接形式主要是邻-对位和对-对位连接。PWF中含有木材组分的液化碎片,且相对分子质量较低,分布较窄。
A novolak-type phenolic resin from phenolated wood and formaldehyde （PWF） was prepared under acidic condition. The effects of various reaction factors on product yield and softening point, including molar ratio, pH value, reaction temperature and reaction time, have been investigated by orthogonal test. The structures of PWF and traditional novolak-type phenolic resin （PF） were characterized by GPC, FT-IR and NMR. The results showed that the yield of PWF was notably affected by pH value and reaction temperature, and the softening point was significantly affected by charge ratio of formaldehyde to phenol. At molar ratio of n（phenol in phenolated wood） ： n（formaldehyde ） 1 ： 0.75, reacted, 105℃ for 150 min under the actual pH value of phenolated wood, the product yield of 124 % and the softening point of 110℃ for PWF were attained. The structure of PWF was similar with that of PF. The phenolic nuclei were linked by a methylene linkage at its ortho-para and para-para positions to a phenolic hydroxyl group. On the other hand, PWF contained fragments of liquefied wood, while the relative molecular mass （Mr） was lower and its distribution was narrower than those of PF.