Grafting poly(ionic liquid) brushes for anti-bacterial and anti-biofouling applications
作者:Qian Ye、Tingting Gao、Fei Wan、Bo Yu、Xiaowei Pei、Feng Zhou、Qunji Xue
DOI:10.1039/c2jm31527k
日期:——
Polymer brushes provide an ideal platform for studying biofouling and screening anti-biofouling materials. In the present work, high-density poly(ionic liquid) brushes based on imidazolium salts were successfully grafted to surfaces via surface-initiated ring-opening metathesis polymerizations from catecholic initiator and their anti-microbial activity was evaluated. Very uniform poly(ionic liquid) coatings with thickness up to 80 nm were obtained on TiO2. Various characterization techniques including infrared spectroscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis and transmission electron microscopy were used to characterize poly(ionic liquid) brushes modified TiO2 nanomaterials. Subsequently, the anti-bacterial and anti-biofouling properties of poly(ionic liquid) brushes were evaluated. It was found that poly(ionic liquid) brushes can obviously resist adhesion of Chlorella spores and the counter-anions have a key impact on the anti-microbial property. The hexafluorophosphate anion poly(ionic liquid) coated TiO2 nanomaterials have excellent anti-bacterial properties compared to pristine TiO2 nanoparticles against both E. coli and S. aureus.
聚合物刷是研究生物污损和筛选抗生物污损材料的理想平台。在本研究中,基于咪唑盐的高密度聚(离子液体)刷通过儿茶酚引发剂的表面引发开环偏合成聚合反应成功接枝到表面,并对其抗微生物活性进行了评估。在二氧化钛上获得了厚度达 80 纳米的非常均匀的聚(离子液体)涂层。利用红外光谱、X 射线光电子能谱、热重分析和透射电子显微镜等多种表征技术对聚离子液体刷修饰的二氧化钛纳米材料进行了表征。随后,对聚(离子液体)刷的抗菌和防生物污损性能进行了评估。结果发现,聚(离子液体)刷能明显抵抗小球藻孢子的附着,而反离子对抗菌性能有关键影响。与原始的二氧化钛纳米粒子相比,六氟磷酸根阴离子聚(离子液体)包覆的二氧化钛纳米材料对大肠杆菌和金黄色葡萄球菌都具有优异的抗菌性能。