Abdal-hay Abdalla, Makhlouf Abdel Salam Hamdy, Khalil Khalil Abdelrazek
†Department of Engineering Materials and Mechanical Design, Faculty of Engineering, South Valley of University, Qena 83523, Egypt.
‡Department of Bionano System Engineering, College of Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea.
ACS Appl Mater Interfaces. 2015 Jun 24;7(24):13329-41. doi: 10.1021/acsami.5b01418. Epub 2015 Jun 11.
Novel photocatalyst membrane materials were successfully fabricated by an air jet spinning (AJS) technique from polyvinyl acetate (PVAc) solutions containing nanoparticles (NPs) of titanium dioxide (TiO2). Our innovative strategy for the production of composite nanofibers is based on stretching a solution of polymer with a high-speed compressed air jet. This enabled us to rapidly cover different substrates with TiO2/PVAc interconnected nanofibers. Surprisingly, the diameters of the as-spun fibers were found to decrease with increasing amount of NPs. Our results showed that AJS PVAc-based fibrous membranes with average fiber diameters of 505-901 nm have an apparent porosity of about 79-93% and a mean pore size of 1.58-5.12 μm. Embedding NPs onto the as-spun fibers resulted in increasing the tensile strength of the obtained composite fiber mats. The photodegradation property of TiO2 membrane mats proved a high efficiency in the decomposition of methylene blue dye. The novel fiber spinning technique discussed in this paper can provide the capacity to lace together a variety of types of polymers, fibers and particles to produce interconnected fibers layer. Our approach, therefore, opens the door for the innovation in nanocomposite mat that has great potential as efficient and economic water filter media and as reusable photocatalyst.
通过空气喷射纺丝（AJS）技术，从含有二氧化钛（TiO₂）纳米颗粒（NPs）的聚醋酸乙烯酯（PVAc）溶液中成功制备了新型光催化剂膜材料。我们生产复合纳米纤维的创新策略基于用高速压缩空气射流拉伸聚合物溶液。这使我们能够用TiO₂/PVAc互连纳米纤维快速覆盖不同的基材。令人惊讶的是，发现初生纤维的直径随着NPs含量的增加而减小。我们的结果表明，平均纤维直径为505 - 901 nm的基于AJS PVAc的纤维膜具有约79 - 93%的表观孔隙率和1.58 - 5.12μm的平均孔径。将NPs嵌入初生纤维中导致所得复合纤维毡的拉伸强度增加。TiO₂膜毡的光降解性能证明了其在亚甲基蓝染料分解方面的高效率。本文讨论的新型纤维纺丝技术能够将各种类型的聚合物、纤维和颗粒连接在一起，以生产互连纤维层。因此，我们的方法为纳米复合毡的创新打开了大门，这种纳米复合毡作为高效且经济的水过滤介质和可重复使用的光催化剂具有巨大潜力。
