木质纤维-丙烯酰胺共聚合成高分子表面活性剂

Synthesis of lignocellulose-acrylamide polymer surfactant through copolymerization.

该文着重研究了在氯化锂/N,N-二甲基乙酰胺(LiCl-DMAc)非水溶剂体系中,通过木质纤维与丙烯酰胺接枝共聚,制备木质纤维-丙烯酰胺高分子表面活性剂的优化合成条件,并对接枝共聚产物的结构进行了表征,对木质纤维-丙烯酰胺高分子表面活性剂的性能进行了测试。结果表明:LiCl-DMAc非水溶剂体系能有效溶解木质纤维,为木质纤维改性制备功能高分子材料提供了较好的均相合成体系;木质纤维与丙烯酰胺接枝共聚的优化合成条件为木质纤维投加量1.5 g、引发剂硝酸铈铵用量0.15 g、丙烯酰胺用量3 g、温度100℃。扫描电镜结果表明,接枝共聚物内部结构较均匀、细密、平滑。通过对比废水处理前后化学需氧量(COD)和浊度的变化发现,合成的木质纤维-丙烯酰胺高分子表面活性剂在造纸废水处理方面有较好的应用性能。

In this study,the graft copolymerization of acrylamide onto wood cellulose in LiCl-DMAc solvent system was studied with the aim of synthesizing cellulose-acrylamide polymer surfactant.Superior synthesis condition was studied and the structure of the graft copolymer was characterized.Besides,the performance of cellulose-acrylamide polymer surfactant was also tested.It was concluded that wood cellulose can be dissolved effectively in LiCl-DMAc solvent system,and this provided a good homogeneous synthesis system for the property modification of wood cellulose and the fabrication of functional polymer material.Superior synthesis conditions of cellulose-acrylamide polymer surfactant were: charge capacity of wood cellulose 1.5?g,initiator amine cerous nitrate 0.15?g,monomer acrylamide 3?g,and temperature 100℃.According to the results of SEM,the inner structure of graft copolymer is homogeneous,compact and smooth.By comparing the changes of chemical oxygen demand(COD) and turbidity in the course of the waste water treatment,the good practical performance of cellulose-acrylamide polymer surfactant was showed in the waste water treatment.