有机掺杂地质聚合物互穿网络结构的调控及对木材胶接性能的影响

AlO4和SiO4聚合网络结构的高脆性和低界面相容性，是地质聚合物低强度胶接木材的根本原因，而目前采用的与有机物简单共混方法难以形成可控的互穿网络结构，对地质聚合物的韧性和界面相容性改善有限。本项目以偏高岭土为地质聚合物原料，以苯丙乳液为有机掺杂物，经碱激发、有机掺杂和养护成型制备有机掺杂地质聚合物基木材胶黏剂。重点通过调节制备工艺参数实现有机掺杂地质聚合物互穿网络结构的可控制备；建立有机掺杂地质聚合物互穿网络结构与胶接性能之间的构效关系；从基体增韧和界面增容角度解析互穿网络结构对有机掺杂地质聚合物基木材胶黏剂胶接性能的影响机制，最终构建结构与性能统一的“可控结构—胶接性能—影响机制”关联系统。本项目预期成果将为高胶接性能地质聚合物基木材胶粘剂的设计与制备提供新思路，对地质聚合物胶接人造板的开发具有重要意义。

Geopolymer consists of a brittle polymeric Si-O-Al framework, with SiO4 and AlO4 tetrahedra joint by sharing O atoms. Low bonding strength between geopolymer and wooden resources is mainly caused by the high brittleness and low interfacial compatibility of geopolymer’s network. Organic polymers have been mixed with geopolymer by organic-inorganic hybrid methods to deal with the brittle problems of geopolymer, and to enhance the interfacial compatibility between geopolymer and organic materials. The interpenetrating polymer network (IPN) structure of this organic polymers-geopolymer composites, however, is difficult to realize and be controlled. This project aims to produce the organic hybrid geopolymer binder for wood with controllable IPN structure through the activated reaction. Metakaolin and styrene-acrylic emulsion are used as the inorganic and organic portions of the reaction resources, respectively. This project focus on the controllable IPN structure of organic hybrid geopolymer binder; set up a structure-property relationship between the IPN structure and bonding properties; analyze the influence mechanism of IPN structure on the bonding properties; and finally, build an association system with the consistency of controllable structure, bonding performance, and impact mechanism. Prospective results of this project will provide new ideas for the design and preparation of advanced organic hybrid geopolymer binder for wooden materials, and serve as a basis for further research and applications.