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低温等离子体引发聚氨酯脲接枝聚氧乙烯和肝素的研究 被引量:1

The Investigation on the Surface Modifacation of Polyurethane Urea with Poly(ethylene oxide)and Heparin by the Activation of the Surface with Cold Plasma
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摘要 合成了以4,4’-二环己基甲烷二异氰酸酯(HMDI)和乙二胺(EDA)为硬段、聚碳酸六亚甲基酯二醇(PHC)为软段的聚酯型聚氨酯脲(PUU),并用聚氧乙烯和肝素(heparin)对其进行了表面改性。通过红外光谱、X射线光电子能谱、接触角等研究了PUU材料的表面结构和性能。实验结果表明,利用室温等离子体方法,成功在PUU表面引入了活性点,引发丙烯酸的表面接枝聚合,经与过量的双端基PEO反应,成功地在PUU表面引入PEO链,并进一步成功地在PUU表面固定了肝素。研究发现,通过PEO和肝素的表面改性,PUU材料的接触角由68°减小到45°(PUU-PEO)和40°(PUU-PEO-heparin),有效提高了PUU表面的亲水性。在相同条件下,分子量较小PEO有较好的接枝效率和较好的肝素固定能力。 Polyurethane urea(PUU)with 4,4′-diisocyanato-methylenedicyclohexane and ethylenediamine as the hard segments and poly(hexamethylene carbonate)diol as the soft segments was synthesized and surface modified with PEO and heparin.The surface graft of PEO and heparin enhanced the hydrophilic properties of the PUU surface with the reduction of the water contact angle from 68° for PUU to 45° and 40° for PUU-PEO and PUU-PEO-heparin,respectively.
出处 《化学通报》 CAS CSCD 北大核心 2011年第8期726-731,共6页 Chemistry
基金 中国科学院支持天津滨海新区建设科技行动计划项目(TJZX2-YW-02) 天津市科技计划项目(08ZCKFSF03300)资助
关键词 聚氨酯脲 表面接枝改性 肝素 接触角 Polyurethane urea Surface graft modification Heparin Water contact angle
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参考文献19

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