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首页> 外文期刊>Materials science & engineering >Preparation of an antibacterial, hydrophilic and photocatalytically active polyacrylic coating using TiO_2 nanoparticles sensitized by graphene oxide
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Preparation of an antibacterial, hydrophilic and photocatalytically active polyacrylic coating using TiO_2 nanoparticles sensitized by graphene oxide

机译：使用氧化石墨烯敏化的TiO_2纳米粒子制备抗菌，亲水和光催化活性的聚丙烯酸酯涂层

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摘要

In recent years more attentions have been paid for preparation of coatings with self-cleaning and antibacterial properties. These properties allow the surface to maintain clean and health over long times without any need to cleaning or disinfection. Acrylic coatings are widely used on various surfaces such as automotive, structural and furniture which their self-cleaning and antibacterial ability is very important. The aim of this work is the preparation of a polyacrylic based self-cleaning and antibacterial coating by the modification of TiO_2 as a coating additive. TiO_2 nanoparticles were sensitized to the visible light irradiation using graphene oxide through the preparation of TiO_2/graphene oxide nanocomposite. Graphene oxide was prepared via a modified Hummers method. TiO_2/graphene oxide nanocomposite was used as additive in a polyacrylic coating formulation. Hydro-philicity, photocatalytic and antibacterial activities as well as coating stability were evaluated for TiO_2/graphene oxide modified polyacrylic coating and compared with that of pristine TiO_2 modified and unmodified polyacrylic coatings. TiO_2/graphene oxide nanocomposite and polyacrylic coating modified by TiO_2/graphene oxide additive were characterized using FT-IR, UV-Vis, XRD, and FESEM techniques. The effect of TiO_2/graphene oxide composition and its percent in the coating formulation was evaluated on the polyacrylic coating properties. Results showed that polyacrylic coating having 3% W TiO_2/graphene oxide nanocomposite additive with TiO_2 to graphene oxide ratio of 100:20 is the best coating considering most of beneficial features such as high photodecolorization efficiency of organic dye contaminants, high hydrophilicity, and stability in water. According to the results, TiO_2 is effectively sensitized by graphene oxide and the polyacrylic coating modified by TiO_2/ graphene oxide nanocomposite shows good photocatalytic activity under visible light irradiation.
机译：近年来，对于具有自清洁和抗菌性能的涂料的制备已给予更多关注。这些特性使表面可以长时间保持清洁和健康，而无需清洁或消毒。丙烯酸涂料广泛用于各种表面，例如汽车，结构和家具，它们的自清洁和抗菌能力非常重要。这项工作的目的是通过改性TiO_2作为涂料添加剂来制备基于聚丙烯的自洁和抗菌涂料。通过制备TiO_2 /氧化石墨烯纳米复合材料，利用氧化石墨烯使TiO_2纳米颗粒对可见光辐射敏感。氧化石墨烯是通过改良的Hummers方法制备的。 TiO_2 /氧化石墨烯纳米复合材料用作聚丙烯酸酯涂料配方中的添加剂。评价了TiO_2 /氧化石墨烯改性的聚丙烯酸酯涂料的亲水性，光催化和抗菌活性以及涂层稳定性，并将其与原始的TiO_2改性和未改性的聚丙烯酸酯涂料进行了比较。利用FT-IR，UV-Vis，XRD和FESEM技术对TiO_2 /氧化石墨烯纳米复合材料和经TiO_2 /氧化石墨烯改性的聚丙烯酸酯涂层进行了表征。评估了TiO_2 /氧化石墨烯组成及其在涂料配方中的百分比对聚丙烯酸酯涂料性能的影响。结果表明，考虑到许多有益的特性，例如有机染料污染物的高光脱色效率，高亲水性以及在水中的稳定性，具有3％W TiO_2 /氧化石墨烯纳米复合添加剂且TiO_2与氧化石墨烯之比为100：20的聚丙烯酸酯涂料是最好的涂料。水。根据该结果，TiO 2被氧化石墨烯有效地敏化，并且由TiO 2 /氧化石墨烯纳米复合物改性的聚丙烯酸酯涂层在可见光照射下显示出良好的光催化活性。

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