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首页> 外文会议>Nanowires and nanotubes - synthesis, properties, devices and energy applications of one-dimensional materials >Growth of ZnO Nanostructures on Cellulosic Substrates
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Growth of ZnO Nanostructures on Cellulosic Substrates

机译：ZnO纳米结构在纤维素基底上的生长

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ZnO nanostructures such as nanorods and nanoneedles were prepared on both cotton textiles and electrospun cellulosic nanofibers by a simple, two-step hydrothermal process at low temperature in aqueous solution. Commercially available cotton fabrics were used. Cellulosic nanofibers (average diameters of 100 nm) were obtained by electrospinning of cellulose acetate/polyvinyl acetate/polyethylene glycol mixture on glass slides to form non-woven mats. On cotton textiles, the systematic change of the seed-to-growth solution concentration ratio caused a noticeable variation on the morphology of the nanostructures. The loading ratio of ZnO nanorods and nanoneedles were 37.5% and 18.1 wt%, respectively. Durable superhydrophobicity was achieved with a static water contact angle of 160.7° upon fluorosilane treatment, even after prolonged exposure to UV and plasma irradiation. The surface wettability was found to slightly vary from nanorods (160.7°) to nanoneedles (159.8°). The ZnO nanostructures did not lose their superhydrophobicity after 1 h of agitation in DI water. Excellent UV blocking activities were observed for nanorods and nanoneedles in the wavelength region analyzed. On electrospun cellulosic nanofibers of approximately 100 nm diameter, the loading ratio of ZnO nanorods were found to be 33.3 wt% which are densely and uniformly distributed the entirety of the nanofibers. Although diameters of the nanofibers and cotton fibers are very different in size (around 100 nm and 15-20 micron, respectively) the ZnO loading on electrospun fibers are very close to that of cotton fabric due to the high surface area and coiled nature of electrospun fibers, resulting in high packing density. ZnO nanorods grown on electrospun nanofibers exhibited hydrophilic behavior.
机译：ZnO纳米结构，例如纳米棒和纳米针，是通过在水溶液中在低温下通过简单的两步水热过程在棉纺织品和静电纺纤维素纳米纤维上制备的。使用可商购的棉织物。纤维素纳米纤维（平均直径为100 nm）是通过将醋酸纤维素/聚醋酸乙烯酯/聚乙二醇混合物静电纺丝在载玻片上形成非织造垫而获得的。在棉纺织品上，种子与生长溶液浓度比的系统变化引起纳米结构形态的显着变化。 ZnO纳米棒和纳米针的负载率分别为37.5％和18.1wt％。在氟硅烷处理下，即使长时间暴露于紫外线和等离子辐射下，其静态水接触角也达到160.7°，实现了持久的超疏水性。发现表面润湿性从纳米棒（160.7°）到纳米针（159.8°）略有变化。在去离子水中搅拌1 h后，ZnO纳米结构没有失去其超疏水性。在分析的波长范围内，纳米棒和纳米针具有出色的紫外线阻隔活性。在直径约100nm的电纺纤维素纳米纤维上，发现ZnO纳米棒的负载率为33.3重量％，其密实且均匀地分布在整个纳米纤维中。尽管纳米纤维和棉纤维的直径大小差异很大（分别约为100 nm和15-20微米），但由于电纺的高表面积和卷曲特性，电纺纤维上的ZnO负载与棉织物非常接近。纤维，导致高堆积密度。在电纺纳米纤维上生长的ZnO纳米棒表现出亲水性能。

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