カチオン性ポリマーのセルロース繊維細孔への浸透

抄録

Cationic polyacrylamide (C-PAM) with the charge density of 2.1 meq/g and the degree of polymerization of 5650 was prepared by the modified Hofmann reaction of PAM. C-PAM was slightly dansylated (fluorescently labeled) in a homogeneous system using aqueous dimethylformamide as solvent. The fluorescent labeling had no effect on the adsorptibity of C-PAM on cellulose fibers.
The adsorption of C-PAM or dansylated C-PAM (DC-PAM) reached the saturation level after only a few days when the concentration of electrolyte was high whereas that continued even after 10 days when the concentration of electrolyte was low. The pre-adsorbed DC-PAM on fibers was exchanged by C-PAM. The exchange reactions proceeded quite rapidly when the contact time between fibers and DC-PAM was short. The exchange became more difficult with increasing contact time. In conclusion, the presented results show that cationic polymer can gradually walk into the pores of fibers by vermiculation.