Abstract Poly (N-isopropyl acrylamide) (PNIPAAm) polymer as a thermo-responsive coating was synthesized by surface-initiated atom transfer radical polymerization (SI-ATRP) on glass substrates. The effects of chain grafting density and polymerization time on the fouling release behavior of a marine diatom were investigated. The PNIPAAm grafting and its thermo-responsiveness were confirmed by different analyses such as scanning electron microscopy (SEM), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), energy-dispersive X-ray spectroscopy, and water contact angle (WCA). Three-way ANOVA analysis reveals that all parameters, including polymerization time, UV irradiation time, and temperature are significant. The results show that by lowering the temperature below the lower critical solution temperature (LCST) of PNIPAAm, the microorganisms wholly detached from the surface. Therefore, PNIPAAm can release marine microorganisms, and it can be a suitable and environmentally friendly alternative for toxic antifouling coatings.

中文翻译：

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聚（N-异丙基丙烯酰胺）表面引发原子转移自由基聚合制备的聚合物拉丝及其防污性能

摘要 聚（N-异丙基丙烯酰胺）（PNIPAAm）聚合物作为热响应涂层，通过表面引发的原子转移自由基聚合（SI-ATRP）在玻璃基板上合成。研究了链接枝密度和聚合时间对海洋硅藻污垢释放行为的影响。通过扫描电子显微镜 (SEM)、衰减全反射傅里叶变换红外光谱 (ATR-FTIR)、能量色散 X 射线光谱和水接触角 (WCA) 等不同分析证实了 PNIPAAm 接枝及其热响应性. 三向方差分析显示所有参数，包括聚合时间、紫外线照射时间和温度都是显着的。结果表明，通过将温度降低到 PNIPAAm 的下临界溶解温度 (LCST) 以下，微生物完全脱离表面。因此，PNIPAAm 可以释放海洋微生物，它可以成为有毒防污涂料的合适且环保的替代品。