蒙脱土对木质素基环氧树脂材料的影响

Montmorillonite Effects on Lignin-based Epoxy Resin Composite

以碱木质素为原料,三氟化硼乙醚为催化剂,用环氧丙烷对碱木质素进行丙氧基化改性后,与环氧氯丙烷反应合成木质素基环氧树脂。以合成的木质素基环氧树脂为基体,有机化蒙脱土为增强材料,采用插层复合法制备了木质素基复合材料。木质素基环氧树脂与有机蒙脱土有很好的相容性,用T31和甲基六氢苯酐作固化剂时,木质素基环氧树脂/有机化蒙脱土(OMMT)复合材料的拉伸强度和冲击强度均高于未加蒙脱土的木质素基环氧树脂。极少量的有机蒙脱土的加入可同时提高木质素基环氧树脂的韧性和强度。

Hydroxyalkyal lignin was synthesized from alkali lignin with propylene oxide. Then it was epoxided by epichlorohydrin catalyzed via boron trifluoride etherate to form ligninbased epoxy resin. Using lignin-based epoxy resin and organic-montmorillonite （OMMT）, lignin-based composite was prepared by intercalated polymerization. The compatibility of lignin-based epoxy resin and OMMT was excellent. When T31 and methyl hexahydro-phthalic anhydride were used as a curing agent, the tensile strength and impact strength of ligninbased epoxy resin/OMMT composite were stronger than lignin-based epoxy resin without OMMT. Thimbleful OMMT could increase the toughness and intensity of the lignin-based epoxy resin.