林产化学与工业2007，Vol.27Issue(4)：31-36,6.
核桃壳苯酚液化及其产物树脂化制备木材胶黏剂的研究
Study on Liquefaction of Walnut Shell in Phenol and Application of Its Resinification Product as Wood Adhesives
摘要
Abstract
Liquefaction of walnut shell in phenol using sulfuric acid as catalyst was investigated under different conditions of mass ratio of phenol to walnut shell, dosage of catalyst, reaction time and temperature. Results showed that with the increasing of phenol/walnut shell ratio from 2/1 to 5/1, the amount of residue decreased from 26.49 % to 6.60 %. With dosage of catalyst from 2 % to 4 %, reaction time from 5 to 120 min and temperature from 100 to 150 ℃, the amounts of residue decreased from 20.79 % to 10.48 %, 48.84 % to 15.62 % and 28.86 % to 9.39 %, respectively; the contents of unreacted free phenol decreased from 17.32 % to 12.67 %,41.71 % to 10.25 % and 21.94 % to 14.33 %, respectively too. Weight average molecular weight (MW) and degree of polydispersity of resultants of liquefaction decreased to 706-1 030, 1.04-1.25, respectively. The high-molecular weight part of liquefaction product decreased with increasing of phenol/walnut shell ratio, but increased with the increasing of H2 SO4 concentration, reaction time and temperature. Compared to conventional phenol-formaldehyde (PF) resin adhesives, the liquefied walnut shell/phenol/formaldehyde co-condensed (WPF) resin can be used as adhesives for plywood with its bonding strength of 1.33 MPa.关键词
核桃壳/苯酚/液化/树脂化/木材胶黏剂Key words
walnut shell/phenol/liquefaction/resinification/wood adhesives分类
化学化工引用本文复制引用
郑志锋,邹局春,张宏健,凌敏..核桃壳苯酚液化及其产物树脂化制备木材胶黏剂的研究[J].林产化学与工业,2007,27(4):31-36,6.基金项目
国家自然科学基金资助项目(30371132) （30371132）
云南省教育厅青年基金项目(04Y420B) （04Y420B）
