The resorcinol diglycidyl acrylate (RDA) is firmly introduced to the surface of polyester (PET) fibers by a simple dip-rolling and baking method, and a free radical polymerization reaction is initiated on the surface of PET fabrics under ultraviolet light (UV) light to obtain three hydrogel layers with different structure, including polyacrylamide (PAAM), polyacrylic acid (PAAC) and poly-N-isopropylacrylamide (PNIPAAM). It is shown that the pretreatment-UV grafting method can be used to obtain hydrogel layers with porous structure on the surface of PET fabric, and all three hydrogel layers have better frictional properties than kelp. Among them, the friction coefficient of PET-PAAM surface can reach 0.02, which is 17% of the friction coefficient of kelp surface and 83% lower than that of the untreated PET fabric surface, giving the PET fabric surface excellent interfacial drag reduction characteristics. It can be applied to the surface of underwater activity equipment as well as ships to improve moving efficiency and reduce energy consumption.

中文翻译：

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一种受海带启发的聚酯织物表面的紫外线接枝水凝胶减阻

通过简单的浸轧和烘烤方法将间苯二酚丙烯酸二缩水甘油酯（RDA）牢固地引入聚酯（PET）纤维表面，并在紫外光（UV）光下在PET织物表面引发自由基聚合反应获得三个不同结构的水凝胶层，包括聚丙烯酰胺（PAAM）、聚丙烯酸（PAAC）和聚-N-异丙基丙烯酰胺（PNIPAAM）。结果表明，预处理-UV接枝法可以在PET织物表面获得具有多孔结构的水凝胶层，并且三个水凝胶层均比海带具有更好的摩擦性能。其中PET-PAAM表面的摩擦系数可达0.02，是海带表面摩擦系数的17%，比未经处理的PET织物表面低83%，赋予 PET 织物表面优异的界面减阻特性。可应用于水下活动设备及船舶表面，提高移动效率，降低能耗。