共查询到18条相似文献,搜索用时 171 毫秒
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随着人们对空气质量问题的日益关注,高性能空气过滤材料逐渐成为研究热点。静电纺纳米纤维具有高比表面积、直径小、制备简单及形貌结构可控性,被认为是空气过滤领域中最具有开发潜力的材料之一。文章综述了近年来静电纺纳米纤维膜在空气过滤中的最新研究进展,系统介绍了粗糙、多孔、串珠、蛛网、褶皱、三维等结构纳米纤维的制备原理,分析和讨论了纳米纤维膜结构对过滤材料综合性能的影响,最后提出了静电纺纳米纤维膜作为空气过滤材料面临的挑战,并对其发展趋势和研究方向进行了展望,为未来制备高性能静电纺纳米纤维过滤膜提供思路。 相似文献
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静电纺是生产亚微米纤维的一个相对简单的方法,可将不同的聚合物溶液加工成纳米纤维。由于其较高的比表面积,静电纺纳米纤维应用非常广泛。通过研究静电纺纳米纤维非织造布中纤维的含量,验证了静电纺纳米纤维非织造布中的空气含量.然后导出了纤维含量与纤维半径的关系,即纤维含量与纤维半径成正比例的关系。通过实验,当PAN溶液的质量分数为8%。施加电压为20kV,接收距离为15cm时,得到的纳米纤维非织造布的空气含量可高达99%. 相似文献
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用作过滤材料的静电纺纳米纤维的研究现状 总被引:2,自引:1,他引:1
综述了用作过滤材料的静电纺纳米纤维的国内外研究和使用现状。静电纺丝为新型高效过滤材料的开发提供了一种新的途径。静电纺纳米纤维的比表面积大,其所构成的纤维毡孔隙率高,且内部孔隙连通性好,容易与纳米级粒子结合,非常适合用作过滤分离材料。 相似文献
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蛋白质不仅能为人类提供必需的营养,同时具备良好的加工及应用特性。蛋白基纳米纤维因其高比表面积而被广泛应用于营养递送、空气过滤、生物医药和组织工程等领域。静电纺丝(电纺)技术作为一种简单有效、成本低廉的纳米纤维有效制备手段,为蛋白基纳米纤维的进一步应用提供了技术保障。本文从电纺蛋白基纳米纤维的制备过程、电纺条件(流速、电压、接收距离等)对纤维形貌的影响、静电纺丝蛋白基纳米纤维的应用(食品工业、药物载送、组织工程、空气过滤)等方面进行了综述,并展望了蛋白基纳米纤维的潜在研究方向,以期为静电纺丝蛋白基纳米纤维的可控构建、功能特性的改善以及静电纺丝的产业化研究和应用提供参考。 相似文献
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P. Opanasopit U. Ruktanonchai O. Suwantong S. Panomsuk T. Ngawhirunpat C. Sittisombut T. Suksamran P. Supaphol 《International journal of cosmetic science》2009,31(3):242-242
Electrospinning is a process used to produce ultrafine fibers with diameters in the nanometer range. Electrospun fiber mats have high potentials for biomedical uses, due to their high surface area and ease of drug incorporation into the fibers. They can be used as carriers for drug delivery and can enhance drug release and skin permeability. The aim of this study was to prepare electrospun fiber mats and to incorporate extracts from the fruit hull of mangosteen. Anti-oxidant activity and extract release were determined and compared between the extract incorporated in the electrospun fiber mats and in the cast films. Poly (vinyl alcohol) (PVA) was selected as the polymer matrix. Extracts in the amount of 2.5%, 5%, and 10% w/w, based on the weight of PVA, were incorporated with 10% w/w PVA to finally obtain electrospun fiber mats and cast films. The extract content was evaluated by anti-oxidative activity using the 2,2-diphenyl-1picryhydrazyl (DPPH) method. The morphology of the electrospun fiber mats was analyzed using a scanning electron microscope (SEM). The results showed that the diameters of the fibers were in nanoscales and that no crystal of the extract was found at any concentration of the extract. The extract contents in the electrospun fiber mats prepared at 2.5%, 5%, and 10% w/w of the extract were 9.6%, 9.7%, and 10.8% of the initial loading concentration, respectively, whereas, those in the cast films were 23.9%, 14.5%, and 21.0%, respectively. The release of the extract from the electrospun fiber mats prepared at 2.5%, 5%, and 10% w/w of the extract at 120 min were 73.2%, 83.6%, and 81.3% w/w, respectively. However, much slower release from the cast films was observed (i.e. 4.3%, 29.1%, and 40.8% w/w, respectively). 相似文献
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静电纺丝非织造过滤材料研究进展 总被引:5,自引:3,他引:2
静电纺丝作为获得纳米纤维最简单的方式之一,凭借其较高的孔隙率和比表面积,在过滤材料方面有很广泛的应用前景。简要介绍了静电纺丝过滤材料的研究状况、静电纺丝技术、过滤机理、性能测试以及纳米纤维过滤材料的应用。 相似文献
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Fog collection is getting to be known as an important technology all over the world. Textiles and fibrous materials have been used and investigated as fog collectors. Plants and animals need to collect water from air in an arid area. We focused on Berkhera purpurea which is one of the African thistles collecting moisture or fog by hairs. This plant captures fog droplets using finer and comparatively hydrophilic hairs supported by thicker and hydorophobic hairs. Mimicking these fibers’ system of thicker fibers and thinner fibers, hydrophobic and comparatively hydrophilic, we made a thinner fiber created by electrospun cellulose acetate on a thicker fiber of Nylon mesh as a supporting material. In the experiment, fine fibers of cellulose acetate are electrospun for 1 min which gave the superior fog capturing property. 相似文献