Title：Synthesis and characterization of polyurethane ionene/zinc chloride complex with antibacterial property
Author：Bu-Peng Ding,
Fang Wu, Si-Chong Chen, Yu-Zhong Wang*,
Jian-Bing Zeng*
Abstract：1,6-bis(N’,N-dimethyl-3-hydroxylpropyl) ammonium
chloride (BQAC-diol)/zinc chloride complex was first synthesized and used as ionic
monomer to synthesize polyurethane ionene/zinc chloride (PUI/ZnCl2)
complex via its polymerization with poly(ethylene glycol) (PEG), 1,4-butanediol
(BDO), and 4,4’-diphenylmethane
diisocyanate (MDI). The structure and properties of PUI/ZnCl2 complex were characterized systematically by NMR, intrinsic viscosity,
thermogravimetric analysis (TGA), differential scanning calorimetry (DSC),
polarized optical microscopy (POM), and tensile test, and the antibacterial
property was investigated by cylinder-plate method. The results indicated that
the crystallization rate of PUI/ZnCl2 increased gradually with
increasing content of ionic unit, which was ascribed to the increased crystal
growth rate as evidenced by POM observation. The morphology analyzed by scanning
electron microscopy indicated that no apparent microphase separation occurred
for the complex and ZnCl2 dispersed at molecular level in PUI
matrix, since no particle-like specie can be observed. Antibacterial property
measurement showed that the PUI containing quaternary ammonium salt cation has
no antibacterial activity but the coexistence of ZnCl2 and cation
exhibit synergetic effect with respect to the antibacterial activity.