Nosrati Rahimeh, Olad Ali, Shakoori Sahar
Polymer Composite Research Laboratory, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran.
Polymer Composite Research Laboratory, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran.
Mater Sci Eng C Mater Biol Appl. 2017 Nov 1;80:642-651. doi: 10.1016/j.msec.2017.07.004. Epub 2017 Jul 12.
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 as a coating additive. TiO nanoparticles were sensitized to the visible light irradiation using graphene oxide through the preparation of TiO/graphene oxide nanocomposite. Graphene oxide was prepared via a modified Hummers method. TiO/graphene oxide nanocomposite was used as additive in a polyacrylic coating formulation. Hydrophilicity, photocatalytic and antibacterial activities as well as coating stability were evaluated for TiO/graphene oxide modified polyacrylic coating and compared with that of pristine TiO modified and unmodified polyacrylic coatings. TiO/graphene oxide nanocomposite and polyacrylic coating modified by TiO/graphene oxide additive were characterized using FT-IR, UV-Vis, XRD, and FESEM techniques. The effect of TiO/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/graphene oxide nanocomposite additive with TiO 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 is effectively sensitized by graphene oxide and the polyacrylic coating modified by TiO/graphene oxide nanocomposite shows good photocatalytic activity under visible light irradiation.
近年来，具有自清洁和抗菌性能的涂层制备受到了更多关注。这些性能使表面能够长时间保持清洁和卫生，无需任何清洁或消毒。丙烯酸涂料广泛应用于汽车、建筑和家具等各种表面，其自清洁和抗菌能力非常重要。本工作的目的是通过改性TiO作为涂料添加剂来制备一种基于聚丙烯酸的自清洁和抗菌涂层。通过制备TiO/氧化石墨烯纳米复合材料，利用氧化石墨烯使TiO纳米颗粒对可见光辐射敏感。氧化石墨烯通过改进的Hummers法制备。TiO/氧化石墨烯纳米复合材料用作聚丙烯酸涂料配方中的添加剂。对TiO/氧化石墨烯改性聚丙烯酸涂层的亲水性、光催化和抗菌活性以及涂层稳定性进行了评估，并与原始TiO改性和未改性聚丙烯酸涂层进行了比较。使用FT-IR、UV-Vis、XRD和FESEM技术对TiO/氧化石墨烯纳米复合材料和由TiO/氧化石墨烯添加剂改性的聚丙烯酸涂层进行了表征。评估了TiO/氧化石墨烯组成及其在涂料配方中的百分比对聚丙烯酸涂层性能的影响。结果表明，考虑到大多数有益特性，如对有机染料污染物的高光脱色效率、高亲水性和在水中的稳定性，含有3%W TiO/氧化石墨烯纳米复合材料添加剂且TiO与氧化石墨烯比例为100:20的聚丙烯酸涂层是最佳涂层。根据结果，TiO被氧化石墨烯有效地敏化，并且由TiO/氧化石墨烯纳米复合材料改性的聚丙烯酸涂层在可见光照射下表现出良好的光催化活性。
