Super Gas Barrier of a Polyelectrolyte/Clay Coacervate Thin Film,Macromolecular Rapid Communications

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Super Gas Barrier of a Polyelectrolyte/Clay Coacervate Thin Film
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2020-11-26 , DOI: 10.1002/marc.202000540
Hsu‐Cheng Chiang ₁ , Thomas J. Kolibaba ₁ , Bailey Eberle ₁ , Jaime C. Grunlan _{1,

2}

Affiliation

Transparent polymeric thin films with high oxygen barrier are important for extending the shelf life of food and protecting flexible organic electronic devices. Polyelectrolyte/clay multilayer nanocoatings are shown to exhibit super gas barrier performance, but the layer‐by‐layer assembly process requires numerous deposition steps. In an effort to more quickly fabricate this type of barrier, a polyelectrolyte/clay coacervate composed of branched polyethyleneimine (PEI), poly(acrylic acid) (PAA), and kaolinite (KAO) clay is prepared and deposited in a single step, followed by humidity and thermal post‐treatments. When deposited onto a 179 µm poly(ethylene terephthalate) (PET) film, a 4 µm coacervate coating reduces the oxygen transmission rate (OTR) by more than three orders of magnitude, while maintaining high transparency. This single‐step deposition process uses only low‐cost, water‐based components and ambient conditions, which can be used to for sensitive food and electronics packaging.

中文翻译：

聚电解质/粘土凝聚层薄膜的超级阻气层

具有高氧气阻隔性的透明聚合物薄膜对于延长食品的保质期和保护柔性有机电子设备很重要。聚电解质/粘土多层纳米涂层显示出超强的气体阻隔性能，但逐层组装过程需要许多沉积步骤。为了更快地制造这种类型的屏障，准备了由支链聚乙烯亚胺（PEI），聚丙烯酸（PAA）和高岭石（KAO）粘土组成的聚电解质/粘土凝聚层，并在一个步骤中进行沉积。通过湿度和热后处理。当沉积在179 µm的聚对苯二甲酸乙二醇酯（PET）膜上时，4 µm的凝聚层可将氧气透过率（OTR）降低三个数量级以上，同时保持高透明度。

更新日期：2020-11-26

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