Hayne Sharon, Margel Shlomo
Department of Chemistry, Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 5290002, Israel.
ACS Omega. 2023 Mar 16;8(12):11406-11413. doi: 10.1021/acsomega.3c00167. eCollection 2023 Mar 28.
In many industrial settings, films of polymers such as polypropylene (PP) and polyethylene terephthalate (PET) require surface treatment due to poor wettability and low surface energy. Here, a simple process is presented to prepare durable thin coatings composed of polystyrene (PS) core, PS/SiO core-shell, and hollow SiO micro/nanoparticles onto PP and PET films as a platform for various potential applications. Corona-treated films were coated with a monolayer of PS microparticles by dispersion polymerization of styrene in ethanol/2-methoxy ethanol with polyvinylpyrrolidone as stabilizer. A similar process on untreated polymeric films did not yield a coating. PS/SiO core-shell coated microparticles were produced by polymerization of Si(OEt) in ethanol/water onto a PS-coated film, creating a raspberry-like morphology with a hierarchical structure. Hollow porous SiO-coated microparticles onto a PP/PET film were formed by dissolution of the PS core of the coated PS/SiO particles with acetone. The coated films were characterized by E-SEM, FTIR/ATR, and AFM. These coatings may be used as a platform for various applications, e.g. magnetic coatings onto the core PS, superhydrophobic coatings onto the core-shell PS/SiO, and solidification of oil liquids within the hollow porous SiO coating.
在许多工业环境中，诸如聚丙烯（PP）和聚对苯二甲酸乙二酯（PET）等聚合物薄膜由于润湿性差和表面能低而需要进行表面处理。在此，我们提出了一种简单的工艺，用于在PP和PET薄膜上制备由聚苯乙烯（PS）核、PS/SiO核壳以及中空SiO微/纳米颗粒组成的耐用薄涂层，作为各种潜在应用的平台。通过以聚乙烯吡咯烷酮为稳定剂，在乙醇/2-甲氧基乙醇中使苯乙烯进行分散聚合，将经电晕处理的薄膜涂覆上单层PS微粒。在未经处理的聚合物薄膜上进行类似工艺无法得到涂层。通过在乙醇/水中使Si（OEt）在涂覆有PS的薄膜上聚合，制备出PS/SiO核壳涂覆的微粒，形成具有分级结构的覆盆子状形态。通过用丙酮溶解涂覆的PS/SiO颗粒的PS核，在PP/PET薄膜上形成中空多孔SiO涂覆的微粒。通过场发射扫描电子显微镜（E-SEM）、傅里叶变换红外光谱/衰减全反射（FTIR/ATR）和原子力显微镜（AFM）对涂覆的薄膜进行表征。这些涂层可作为各种应用的平台，例如在核心PS上的磁性涂层、在核壳PS/SiO上的超疏水涂层以及在中空多孔SiO涂层内固化油液。
