摘要
以纸张和乙酸木素为主要原料合成乙酸木素-TDI-PEG聚氨酯化纸张,分析了其物理特性、表面形态及其机理。研究结果表明,该复合材料的纸张耐折度、耐破度和湿强度等物理指标有明显改善。其原因是木素-TDI-PEG体系能够与纸张中纤维素的羟基反应,生成氨基甲酸酯结构,通过电子显微镜观察发现,其不仅可在纤维之间起到架桥作用,还可以把木素与纤维素联结起来,形成木素-TDI-PEG-纤维素四元体系型聚氨酯复合材料。
AAL-TDI-PEG polyurethane treated paper was synthesized with paper and acetic acid lignin as major materials and its physical feature, surface morphology and mechanism are analyzed. The findings show that： the physical indices such as folding endurance, bursting strength and wet strength of the composite material were remarkably improved. The reason lies in that the AAL-TDI-PEG system can react with hydroxy of cellulose in the paper to form amino-formic ester structure. It can be observed under the electron microscope that it has bridging action between fibers, and connects lignin and cellulose thus forming the polyurethane composite material of AAL-TDI-PEG-cellulose quaternary system type.
出处
《中华纸业》
CAS
北大核心
2005年第8期52-54,共3页
China Pulp & Paper Industry
基金
国家自然科学基金资助项目(29974011
30170756)
广东省科技攻关项目(2003C104025)
