林业工程学报2018，Vol.3Issue(2)：88-94,7.DOI:10.13360/j.issn.2096-1359.2018.02.015
沙柳液化产物制备聚氨酯/环氧树脂互穿网络聚合物泡沫的性能
Properties of polyurethane/epoxy interpenetrating polymer network foam from liquefaction of barren-ground willow
摘要
Abstract
Barren?ground willow(Salix psammophila)is a species of flowering plant in the willow family, which is one of the plenty resources planted in China,but is currently under?utilized due to some properties that limit its appli?cation. In this paper,branches of the barren?ground willow were converted into liquefied products containing the hy?droxyl?OH and reactive products by the biomass pyrolysis technology to replace petrochemical resources which was used to make polyurethane/epoxy IPN rigid foam. In order to obtain the optimum process parameters for the prepara?tion of barren?ground willow liquefaction products of polyurethane/epoxy resin interpenetrating polyurethane foam (PU/EP IPN),the certain proportion of liquefaction of barren?ground willow, isocyanate(MDI), epoxy resin(E?51)were used as the main raw materials,water as foaming agent,stannous octanate as catalyst,organic montmoril?lonite(OMMT)as nucleating agent,DMP?30 as curing agent for the experiments. Through several groups of the sin?gle factor test and the orthogonal test,the effects of different amount of EP,MDI,stannous octanate,water and OM?MT dosage on the foam apparent density and compressive strength were analyzed. The scanning electron microscope and Thermogravimetric(TG)analyzer were used to characterize the foam material.The results showed that the effects of main raw materials and foaming auxiliaries on the mechanical properties of foams were as the following order:the EP dosage>MDI dosage>stannous octanate dosage>blowing agent dosage>OMMT dosage. The apparent density of the foam obtained by the optimized process was 0.091 g/cm3,and the compressive strength was 0.835 MPa. The results of the TG test showed that the thermal stability of the IPN foam increased with the amount of the EP. The analysis re?sults of the limiting oxygen index showed that the OMMT can not only made the cell uniform,but also as a modifier to improve the flame retardant properties of the foam, while the excessive OMMT on the flame retardant effect was not obvious.关键词
沙柳液化产物/互穿网络聚合物/压缩强度/热稳定性/阻燃性能Key words
liquefaction of Salix psammophila/interpenetrating polymer networks(IPN)/compressive strength/ther-mal stability/flame retardant properties分类
农业科技引用本文复制引用
韩望,袁大伟,奥亚茹,何林韩,安珍..沙柳液化产物制备聚氨酯/环氧树脂互穿网络聚合物泡沫的性能[J].林业工程学报,2018,3(2):88-94,7.基金项目
内蒙古自治区自然科学基金(2017BS0306) （2017BS0306）
国家自然科学基金(31360160). （31360160）
