Surface modifying additives (SMAs), which may be readily blended into silicones to improve anti-fouling behavior, must have excellent surface migration potential and must not leach into the aqueous environment. In this work, we evaluated the efficacy of a series of poly(ethylene oxide) (PEO)-based SMA amphiphiles which varied in terms of crosslinkability, siloxane tether length (m) and diblock versus triblock architectures. Specifically, crosslinkable, diblock PEO-silane amphiphiles with two oligodimethylsiloxane (ODMS) tether lengths [(EtO)3Si-(CH2)3-ODMS m -PEO8, m = 13 and 30] were compared to analogous non-crosslinkable, diblock (H-Si-ODMS m -PEO8) and triblock (PEO8-ODMS m -PEO8) SMAs. Prior to water conditioning, while all modified silicone coatings exhibited a high degree of water-driven surface restructuring, that prepared with the non-crosslinkable diblock SMA (m = 13) was the most hydrophilic. After conditioning, all modified silicone coatings were similarly hydrophilic and remained highly protein resistant, with the exception of PEO8-ODMS 30 -PEO8. Notably, despite twice the PEO content, triblock SMAs were not superior to diblock SMAs. For diblock SMAs, it was shown that water uptake and leaching were also similar whether or not the SMA was crosslinkable.

中文翻译：

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基于表面改性添加剂两亲物的防污有机硅。

表面改性添加剂（SMA）可以很容易地混合到有机硅中以改善防污性能，必须具有优异的表面迁移潜力，并且不得浸入水性环境中。在这项工作中，我们评估了一系列基于聚环氧乙烷 (PEO) 的 SMA 两亲物的功效，这些两亲物在交联性、硅氧烷链长度 (m) 以及二嵌段与三嵌段结构方面有所不同。具体来说，将具有两个低聚二甲基硅氧烷 (ODMS) 系链长度 [(EtO)3Si-(CH2)3-ODMS m -PEO8，m = 13 和 30] 的可交联二嵌段 PEO-硅烷两亲物与类似的不可交联二嵌段 (H -Si-ODMS m -PEO8) 和三嵌段 (PEO8-ODMS m -PEO8) SMA。在进行水处理之前，虽然所有改性有机硅涂料都表现出高度的水驱动表面重组，但用不可交联的二嵌段 SMA (m = 13) 制备的涂料是最亲水的。经过调节后，除 PEO8-ODMS 30 -PEO8 外，所有改性有机硅涂层均具有类似的亲水性并保持高度抗蛋白质性。值得注意的是，尽管 PEO 含量是二嵌段 SMA 的两倍，但三嵌段 SMA 并不优于二嵌段 SMA。对于二嵌段 SMA，无论 SMA 是否可交联，吸水率和浸出率也相似。