半氟化季铵化三嵌段共聚物对空气传播和海洋微生物的抗菌行为。

Antimicrobial behavior of semifluorinated-quaternized triblock copolymers against airborne and marine microorganisms.

机构信息

Department of Materials Science & Engineering and Department of Microbiology, Cornell University, Ithaca, New York 14853, USA.

出版信息

ACS Appl Mater Interfaces. 2010 Mar;2(3):703-11. doi: 10.1021/am900748v.

DOI:10.1021/am900748v

PMID:20356271

Abstract

Semifluorinated-quaternized triblock copolymers (SQTCs) were synthesized by chemical modification of polystyrene-block-poly(ethylene-ran-butylene)-block-polyisoprene ABC triblock copolymers. Surface characterization of the polymers was performed by X-ray photoelectron spectroscopy (XPS) and near-edge X-ray absorption fine structure (NEXAFS) analysis. The surface of the SQTC showed very high antibacterial activity against the airborne bacterium Staphylococcus aureus with >99 % inhibition of growth. In contrast in marine fouling assays, zoospores of the green alga Ulva settled on the SQTC, which can be attributed to the positively charged surface. The adhesion strength of sporelings (young plants) of Ulva and Navicula diatoms (a unicellular alga) was high. The SQTC did not show marked algicidal activity.

摘要

半氟化季铵化三嵌段共聚物（SQTCs）通过对聚苯乙烯-嵌段-聚（乙烯-ran-丁烯）-嵌段-聚异戊二烯 ABC 三嵌段共聚物进行化学修饰而合成。通过 X 射线光电子能谱（XPS）和近边 X 射线吸收精细结构（NEXAFS）分析对聚合物进行表面表征。SQTC 表面对空气中的金黄色葡萄球菌表现出非常高的抗菌活性，对生长的抑制率>99%。相比之下，在海洋污损试验中，绿藻浒苔的游动孢子附着在 SQTC 上，这可归因于带正电荷的表面。浒苔和硅藻（单细胞藻类）的孢子的附着强度高。SQTC 没有表现出明显的杀藻活性。