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549 电化学诱导表面引发原子转移自由基聚合构筑离子型聚联巩膜功能表面/吴家宇竽电化学诱导表面引发原子转移自由基聚合构筑离子型聚醯砚膜功能表面吴家宇I，李丹】，康龙冉奋2<1兰州理工大学材料科学与工程学院兰州730050,2兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室兰州730050)摘要 采用电化学诱导表而引发原子转移自由基聚合(SIyATRP)技术在決41聚多巴脏的聚羅玖质基底上按枝离子型聚合 物分子刷聚对苯乙烯磺酸钠并通过单体浓度对聚合物分子刷进行调控采用SEM.AFM.XPS.水接触角等表征方法对改性聚経 我廉的姑构和性能进行表征采用水通曼对其进行濾过柱能泌定结呆表明：成功地在改性聚瞇巩膜表面接枝舄子型聚合物分子 刷聚对笨乙烯碳酸钠'聚合物剧相互竝结形成了球状颗粒$随着电化学诱导体系中单体浓度的增大聚合物分子刷的按枝童增加， 同时水接触角显蓊降低；聚合物膜表面离子空分子剧的沟筑改善了亲水性因此其地水通量明显增加牛血清白妥白(BSA)微留率 和通量恢复率都得對了提高。SI-eATRP用于聚合物膜材料的表面改性和调控，在生物和容性膜等领域具有潜在的应用前录.关键词 粱合物膜衣面改性SI-eATRP聚合物刷聚合物合金中图分类号:TB342；TQ316.3 文 itt 标识码：A DOIJO. 11896/j.issn. 1005-023X. 2018. 04. 008Construction of lon-type Functional Surface of Polyethersulfone Membrane viaSurface-initiated Electrochemica卜mediated Atom TransferRadical Polymerization(SI-eATRP)WU Jiayu1, LI Dan1, KANG Long1*2, RAN Fen1-2(1 College of Materials Science and Engineering. Lanzhou University of Technology Lanzhou 730050；2 State Key Laboratoryof Advanced Processing and Recycling of Non ferrous Metals, Lanzhou University of Technology, Lanzhou 730050)Abstract The polymer brushes o: poly( sodium p styrcneulfonate hydrule) was introduced onto polycthersulfone membrane by coating poly( dopamine) and grafting poly (sodium p-styrencsulfonatc hydrate) via surface-initiated electrochemical-mcdiated atom transfer radical polymerization(SI-cATRP), and the monomer concentration was used to adjust the amount of polymer brush The structure and properties of the modified membrane were characterized by SEM,八FM, XPS, and water contact angles and the filtration performance was measured by water flux. The results showed that poly(sodium p-styrenesulfonate hydrate) chains were successfully grafted onto the mpmhranp Riirfarp. And pnlympr hriisho* werp t«nglod to farm sphricl particles With the increase of monomer concentration in the electrochemical induced system» the amount of grafting polymer brush increased« thus the water contact angle decreased significantly. The hydrophilicity of the ionic membrane improved > which contributed to the obvious increase of water flux The BSA rejection rate arid flux recovery rate performance have been improved. SI-eATRP method used for surface modification and regulation of polymer film materials has potential application prospects in biocompatible membranes.Key words polymer membrane, surface modification* surface-initiated electrochemicakmediated atom transfer radical polymerization* polymer brushes* polymer blend0引言生物医用高分子材料:在应用过程中，与血液接傩后 可能会产生凝血。生物材料在血液中町以激活凝血因子 (皿)和引起补体激活而导致血栓'且蛋白吸附还会引起血小 板粘附从而形成血小板血栓。在用于生物保学领域的聚合 材料中聚«W(PES)t3$-是最珥要和广泛使用的聚合材料之 一待别是作为聚合物膜材料。PES膜显示岀优舁的抗氧化 性.热稳定性以及良好的力学和成膜性能然而，当PES膜用于工业和临床领域时，固有的疏水性限制了其实际应 用。最近几年人们开始注重在膜表面用离子型聚合物进行 改性.在膜表面引入负电基团时，当膜材料与血液接触，血 液中带负电性的细胞就会被膜表面负电荷排斥从而避免带 负电性的血液成分在材料表面粘附同时也可以改善膜的亲 水性.对PES膜改性能够有效抑制血栓的形成，提高其抗凝 血性能，使其在血液接触匆域的应用具有一定的前景。表面引发原子转移自由基聚合-ATRP)佃方法是表 面接枝聚合刷最为常用且比较有效的方法但是这种方法仍基金项目：国家自然科学基金(51203071,51363014151463012| 51763014)1 博 士后科学基金 < 2014 M552509 > 2O15T81O64 ) > 甘条省 自然科学基金(1506RJZA098；兰州理工大学红柳杰出人才计划(J2O14O2)吴家字：男J991年生，硕士主要研究方向为生物医用高分子材料冉奋：通信作者男.1978年生博士 剧裁授主要从事高分 子能源及医用材料研究 E mail:ranfen®
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