Isocyanate-terminated polyurethane prepolymer (QASs-PEG-NCO) containing quaternary ammonium cation and salicylaldehyde unit was synthesized from N,N-dimethyl-N-(3-formyl-4-hydroxybenzyl)-N-(hydroxyl polyethylene glycol-600) ammonium chloride (QASs-PEG-600) and toluene diisocyanate (TDI).The structures of QASs-PEG-NCO and QASs-PEG-600 were characterized by FT-IR and 1H-NMR.The results showed that the free TDI concentration in QASs-PEG-NCO solution was lower than 0.20%,and NCO content was close to the theoretical value when the initial NCO/OH of the raw materials was 2.02,the reaction temperature was 60℃ and the reaction time was 2h.As an active multi-functional coating,QASs-PEG-NCO was applied to the post-chemical modification of thermoplastic polyurethane film(TPUF).It was found that the modified TPUF surface was highly hydrophilic and could effectively prevent the adhesion and growth of E.coli and S.aureus on TPU surface.
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基金资助
江苏省自然科学基金项目(BK20161294);连云港市自然科学基金项目(CG1602);江苏省高校科研-项目(15KJB430004);江苏省研究生科研与实践创新计划项目(KYCX19-2271)
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