胍盐抗菌剂/羧甲基纤维素钠的聚电解质复合物在造纸中的应用

Polyeletrolyte Complex Containing Guanidine-based Antimicrobial Polymer and Its Application on Papermaking

将胍盐抗菌剂与羧甲基纤维素钠（CMC）形成聚电解质复合物,应用于纸页抄造中可获得具增湿强功能的抗菌纸。本文采用了两种不同分子量的CMC,研究了CMC的分子量对胍盐抗菌剂/CMC聚电解质复合物的抗菌效果和增湿强效果的影响。实验表明,高分子量的CMC有利于增加纸页的抗菌性和强度尤其是湿强度,当聚电解质复合物的复合比例为0.5-1.0,添加到纸浆中的复合物含量为1%时,能够使纸页具备很好的干/湿强度比（大于20%）。通过原子力显微镜观察到纸页表面的聚电解质复合物小颗粒的形态发生了改变,表明加热干燥可以极大地提高纸页的强度性质,而45min是最佳的干燥时间。

Polyeletrolyte complexes were formed by the electronic interaction between the guanidine-based antimicrobial polymer and carboxymethylcellulose. Antimicrobial paper with wet strength property was obtained by adding these polyeletrolyte complexes in the papermaking process. According to CMC with different molecular weight used in the paper, a study was made to reveal the effect of molecular weight on wet strength and antimicrobial activity of polyeletrolyte complex. Compared to the low molecular weight of CMC, it was found that CMC with high molecular weight was more likely to increase the wet strength and antimicrobial activity of paper. The wet/dry strength ratio of paper reached above 20% when components ratio in complex was in the range of 0.5 - 1.0 and addition dosage of the complex were around 1%. Surface microstructure of paper with complexes was observed by atom force microscopy. Results showed that strength property of paper increased dramatically via heating treatment and 45 minutes were the most appropriate heating time.