Combinatorial Materials Research Applied to the Development of New Surface Coatings XV: An Investigation of Polysiloxane Anti-Fouling/Fouling-Release Coatings Containing Tethered Quaternary Ammonium Salt Groups
Combinatorial Materials Research Applied to the Development of New Surface Coatings XV: An Investigation of Polysiloxane Anti-Fouling/Fouling-Release Coatings Containing Tethered Quaternary Ammonium Salt Groups
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DOI：
10.1021/co200004m
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发表时间：
2011-05-01
影响因子：
--
通讯作者：
Chisholm, Bret J.
中科院分区：
文献类型：
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作者：
Majumdar, Partha;Crowley, Elizabeth;Chisholm, Bret J.
作为持续努力的一部分，旨在开发含有束缚季铵盐 (QAS) 部分的湿固化聚硅氧烷涂料的广泛结构-性能关系，以作为对抗海洋生物污垢的环保涂料的潜在应用，进行了一项组合/高通量 (C/HT) 研究，重点关注四种不同的成分变量。研究的涂层源自硅烷醇封端的聚二甲基硅氧烷 (HO-PDMS-OH)、QAS 官能烷氧基硅烷和甲基三乙酰氧基硅烷的溶液混合物。研究的组成变量是 QAS 官能硅烷的烷氧基硅烷官能度、连接到 QAS 氮原子的单价烷基的链长、QAS 官能烷氧基硅烷的浓度以及 HO-PDMS-OH 的分子量。在这些变量中，QAS 官能硅烷的烷氧基硅烷官能团的组成是一个独特的变量，之前尚未研究过。使用基于三种不同海洋微生物的 HT 测定来表征 24 种独特涂料组合物的防污 (AF) 和污垢释放 (FR) 特性，即两种细菌，溶纤维噬菌体和太平洋盐单胞菌，以及硅藻，不确定舟形藻。通过表面能、水接触角滞后和原子力显微镜 (AFM) 来表征涂层表面。在所研究的组成空间中获得了各种各样的响应。方差分析表明，成分变量及其相互作用显着影响个体海洋微生物的 AF/FR 行为。研究还发现，与基于甲氧基硅烷官能类似物的涂料相比，使用乙氧基硅烷官能 QAS 可以增强 AF 特性。这归因于涂层-空气界面处 QAS 基团的表面偏析增强，并通过 AFM 相图证实。
As part of ongoing efforts aimed at the development of extensive structure-property relationships for moisture-curable polysiloxane coatings containing tethered quaternary ammonium salt (QAS) moieties for potential application as environmental friendly coatings to combat marine biofouling, a combinatorial/high-throughput (C/HT) study was conducted that was focused on four different compositional variables. The coatings that were investigated were derived from solution blends of a silanol-terminated polydimethylsiloxane (HO-PDMS-OH), QAS-functional alkoxysilane, and methyltriacetoxysilane. The compositional variables investigated were alkoxysilane functionality of the QAS-functional silane, chain length of the monovalent alkyl group attached to the QAS nitrogen atom, concentration of the QAS-functional alkoxysilane, and molecular weight of the HO-PDMS-OH. Of these variables, the composition of the alkoxysilane functionality of the QAS-functional silane was a unique variable that had not been previously investigated. The antifouling (AF) and fouling-release (FR) characteristics of the 24 unique coating compositions were characterized using HT assays based on three different marine microorganisms, namely, the two bacteria, Cellulophaga lytica and Halomonas pacifica, and the diatom, Navicula incerta. Coatings surfaces were characterized by surface energy, water contact angle hysteresis, and atomic force microscopy (AFM). A wide variety of responses were obtained over the compositional space investigated. ANOVA analysis showed that the compositional variables and their interactions significantly influenced AF/FR behaviors toward individual marine microorganisms. It was also found that utilization of the ethoxysilane-functional QASs provided enhanced AF character compared to coatings based on methoxysilane-functional analogues. This was attributed to enhanced surface segregation of QAS groups at the coating-air interface and confirmed by phase images using AFM.