Abstract Layer-by-layer (LbL) deposition technique has been employed to design mussel-inspired UV protective organic coating using polyethylenimine-polydopamine (PEI-PDA) and poly (acrylic acid) (PAA) pairs. The photocatalytic decomposition of RhB (Rhodamine B) is studied inside the multilayer coated glass vials and a 10 BLs (Bilayers) coatings with a thickness of 1 µm reduces the degradation efficiency of the dye by a factor of 7. The nanocomposite films remain stable under a broad range of pH (pH 4 to pH 10) and temperature (250 °C). The presence of PDA in the nanocomposite films offers a substrate independent adhesion and the film has grown conformally on diverse substrates like cotton and poly(ethylene terephthalate) (PET) using spray assisted LbL coating. Moreover, a study has shown that LbL deposited films have better UV protection efficiency compared to traditional “one pot” PDA deposited films. Finally, these environmental friendly multilayer films are able to protect the degradation of conducting poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films from long UV exposure.

中文翻译：

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通过逐层组装的贻贝启发的紫外线防护有机涂层

摘要 使用聚乙烯亚胺-聚多巴胺 (PEI-PDA) 和聚丙烯酸 (PAA) 对，采用逐层 (LbL) 沉积技术设计受贻贝启发的紫外线防护有机涂层。在多层涂层玻璃小瓶内研究了 RhB（罗丹明 B）的光催化分解，厚度为 1 µm 的 10 BLs（双层）涂层将染料的降解效率降低了 7 倍。纳米复合膜在广泛的 pH 值（pH 4 至 pH 10）和温度 (250 °C)。纳米复合薄膜中 PDA 的存在提供了独立于基材的粘附力，并且该薄膜使用喷雾辅助 LbL 涂层在棉花和聚对苯二甲酸乙二醇酯 (PET) 等不同基材上保形生长。而且，一项研究表明，与传统的“单锅”PDA 沉积膜相比，LbL 沉积膜具有更好的紫外线防护效率。最后，这些环保的多层薄膜能够保护导电聚（3,4-亚乙基二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）薄膜免受长时间紫外线照射的降解。