Department of Materials Science & Engineering, Cornell University, Bard Hall, Ithaca, New York 14853, USA.
Langmuir. 2009 Oct 20;25(20):12266-74. doi: 10.1021/la901654q.
An amphiphilic triblock surface-active block copolymer (SABC) possessing ethoxylated fluoroalkyl side chains was synthesized through the chemical modification of a polystyrene-block-poly(ethylene-ran-butylene)-block-polyisoprene polymer precursor. Bilayer coatings on glass slides consisting of a thin layer of the amphiphilic SABC spray coated on a thick layer of a polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene (SEBS) thermoplastic elastomer were prepared for biofouling assays with the green alga Ulva and the diatom Navicula. Dynamic water contact angle analysis and X-ray photoelectron spectroscopy (XPS) were used to characterize the surfaces. Additionally, the effect of the Young's modulus of the coating on the release properties of sporelings (young plants) of the green alga Ulva was examined through the use of two different SEBS thermoplastic elastomers possessing modulus values of an order of magnitude in difference. The amphiphilic SABC was found to reduce the settlement density of zoospores of Ulva as well as the strength of attachment of sporelings. The attachment strength of the sporelings was further reduced for the amphiphilic SABC on the "low"-modulus SEBS base layer. The weaker adhesion of diatoms, relative to a PDMS standard, further highlights the antifouling potential of this amphiphilic triblock hybrid copolymer.
一种具有乙氧基化氟烷基侧链的两亲性三嵌段表面活性剂嵌段共聚物（SABC）是通过对聚苯乙烯-嵌段-聚（乙烯-ran-丁烯）-嵌段-聚异戊二烯聚合物前体进行化学修饰而合成的。在玻璃载玻片上制备了双层涂层，由薄的两亲性 SABC 喷雾涂层和厚的聚苯乙烯-嵌段-聚（乙烯-ran-丁烯）-嵌段-聚苯乙烯（SEBS）热塑性弹性体组成，用于进行绿藻和硅藻的生物污垢测定。使用动态水接触角分析和 X 射线光电子能谱（XPS）对表面进行了表征。此外，通过使用两种具有模量值相差一个数量级的不同 SEBS 热塑性弹性体，考察了涂层杨氏模量对绿藻 Ulva 孢子苗（幼苗）释放性能的影响。发现两亲性 SABC 降低了 Ulva 的游动孢子的定居密度以及孢子苗的附着强度。在低模量 SEBS 基层上，两亲性 SABC 进一步降低了孢子苗的附着强度。与 PDMS 标准相比，硅藻的附着强度较弱，进一步凸显了这种两亲性三嵌段杂化共聚物的防污潜力。
