意大利杨树皮苯酚液化物制备酚醛发泡材料  

Phenolic Foam Prepared from Liquefaction of Phenolated Poplar Bark

作　　者：张文博[1,2] 牛敏[1] 孙丁阳[1] 

机构地区：[1]北京林业大学材料科学与技术学院,北京100083 [2]林业生物质材料与能源教育部工程研究中心,北京100083

出　　处：《林产化学与工业》2009年第B10期129-132,共4页Chemistry and Industry of Forest Products

基　　金：2008年度北京市与在京高校重点实验室共建项目(无编号)

摘　　要：以苯酚为液化剂对意大利杨树皮粉末进行液化,获得的液化物树脂化后用于制备发泡材料。结果表明:1)意杨树皮在进行液化时,树皮粉与苯酚的质量比(木酚比)在1∶3以上获得较好的液化效果;2)用硫酸做催化剂的效果比用对甲苯磺酸的效果好,且随着木酚比的增加,残渣率降低;3)液化反应时,将苯酚融化使之与树皮粉混合均匀再升温可以显著降低残渣率;4)甲醛和40%NaOH与液化物的物质的量比、温度以及时间对液化物树脂的黏度影响较大,进而影响后续的发泡成型;5)通过调整树脂化和发泡工艺,树皮液化物制备获得的发泡材料密度为0.11 g/cm3,压缩强度为2.8 MPa。In this study Italian poplar（Populus euramevicana cv.‘I-214’）bark was used to prepare phenolic foam by liquefaction. Results obtained were as follows ： 1 ） good liquefaction effect can be gained at bark powder-phenol 1 ： 3 in mass ratio ; 2 ） The catalytic effect of sulfuric acid is superior to toluene-p-sulfonic acid. Under the catalytic conditions, residue rate decreased with increase of bark powder-phenol ratio; 3）Residue rate markedly decreases during liquefaction procedure with increasing temperature after blending bark powder with melted phenol homogeneously ; 4 ） Molar ratios of HCHO/phenolated bark and 40 % NaOH/ phenolated bark, liquefaction temperature and time have significant effect on the viscosity of liquefied bark resin, which has great impact on following foaming procedures; 5）Phenolic foam with a density of 0.11 g/cm^3 and a compressing strength of 2.8 MPa was prepared successfully through regulating the conditions of resinfication and foaming.

关 键 词：意杨树皮 苯酚液化 树脂化 发泡材料 

分 类 号：TQ351.0[化学工程]