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    • 63. 发明授权
    • High flux hollow fiber ultrafiltration membranes and process for the preparation thereof
    • 高通量中空纤维超滤膜及其制备方法
    • US09364797B2
    • 2016-06-14
    • US13819692
    • 2011-09-13
    • Alamuru Venktarami ReddyParamita RayPuyam Sobhindro SinghParashuram KallemSandipkumar MauryaJitendra Jaydevprasad Trivedi
    • Alamuru Venktarami ReddyParamita RayPuyam Sobhindro SinghParashuram KallemSandipkumar MauryaJitendra Jaydevprasad Trivedi
    • B01D39/00B29C47/00B01D71/68B01D61/14B01D69/08B01D71/82D01D10/06B01D71/28B01D71/40B01D71/42
    • B01D71/68B01D61/145B01D69/08B01D69/087B01D71/28B01D71/40B01D71/42B01D71/76B01D71/82B01D2323/42D01D10/06
    • The present invention relates to the production of high flux hollow fiber ultrafiltration membrane prepared from poly(acrylonitrile-co-methacrylic acid), (polysulfone and poly(acrylonitrile-co-methacrylic acid)) and (polysulfone and ion exchange resin (sulfonated polystyrene-divinyl benzene copolymer)) blend and the point-of-use filtration unit there from for water purification and disinfection. The produced membrane has an active layer with pore size which effectively rejects pathogens and other bacteria from contaminated water while allowing the passage of water to produce biologically pure water for drinking. Therefore, the present invention relates to development of hollow fiber ultrafiltration membrane that delivers biologically pure water at a desirable rate, that is at a rate 25-200 liters/m2.h. The membrane performance in terms of flux and rejection efficiency is dependent on polymer material type and surface properties. The hollow fiber membrane with interpenetrated structure prepared from a blend of polysulfone and a copolymer of acrylonitrile and methacrylic acid is advantageous over the membranes made either from polysulfone or the copolymer alone in terms of durability, strength, elasticity, smoothness, flux, separation efficiency, fouling resistance properties. The surface modified blend membranes with acid groups which have smaller pore size and surface charge exhibit further improvement in the separation efficiency. Using the hollow fiber membranes a point-of-use water filtration unit which is simple, compact, inexpensive device that does not require electricity has been developed to produce 150-300 ml/min product water when attached to a tab from overhead tank of about 3 meter height.
    • 本发明涉及由聚(丙烯腈 - 共 - 甲基丙烯酸),(聚砜和聚(丙烯腈 - 共 - 甲基丙烯酸))制备的高通量中空纤维超滤膜和(聚砜和离子交换树脂(磺化聚苯乙烯 - 二乙烯基苯共聚物))混合物和使用的过滤单元用于水净化和消毒。 所生产的膜具有孔径大小的活性层,其有效地从受污染的水中排除病原体和其他细菌,同时允许水通过以产生生物纯净的饮用水。 因此,本发明涉及以优选的速率,即25-200升/ m2.h的速率输送生物纯水的中空纤维超滤膜的开发。 在通量和排出效率方面的膜性能取决于聚合物材料的类型和表面性质。 由聚砜和丙烯腈和甲基丙烯酸共聚物的共混物制备的具有互穿结构的中空纤维膜在耐久性,强度,弹性,平滑度,通量,分离效率方面优于由聚砜或单独的共聚物制成的膜, 防污性能。 具有较小孔径和表面电荷的酸基的表面改性共混膜表现出进一步提高分离效率。 使用中空纤维膜,当使用不需要电力的简单,紧凑,廉价的装置时,开发了一个使用点的水过滤装置,当连接到从大约30公吨的塔顶罐的标签上时,产生150-300毫升/分钟的产品水 3米高。
    • 65. 发明申请
    • METHOD OF DRY-SPINNING PARA-ARAMID FIBER
    • 干纺纤维纤维的方法
    • US20150354093A1
    • 2015-12-10
    • US14758165
    • 2013-12-19
    • KOLON INDUSTRIES, INC.
    • Tae Hak PARKBum Hoon LEEJae Young LEEYoung Cheol PARKKyeong Hwan RHO
    • D01D5/04D01D5/12D01D10/06
    • D01D5/04D01D5/12D01D10/06D01F6/805D01F11/08D10B2331/021
    • The present invention provides a method for manufacturing para-aramid fibers, which includes: spinning a polymeric solution containing aramid polymer in an organic solvent through a spinneret into an inert gas to partially remove the organic solvent contained in the spun fiber; contacting the spun fiber with conditioning solution, so as to maintain residual water in fiber in a range of 10 to 15%; and subjecting the treated fiber to drawing, washing and heating in a dry-spinning manner. The present invention may greatly reduce energy consumption and costs for recovery of the solvent, as compared to a conventional manufacturing method of aramid fiber in a wet-spinning manner. Further, the present invention may solve conventional problems such as corrosion of apparatus, deterioration of working environments, or the like, since a concentrated sulfuric acid solvent is not used in a spinning process. Still further, the present invention may conduct drawing and heating after maintaining the residual water in fiber in a range of 10 to 15% before drawing, thereby remarkably improving the strength and elastic modulus of the fiber.
    • 本发明提供对位芳族聚酰胺纤维的制造方法,其包括:将含有芳族聚酰胺聚合物的有机溶剂中的聚合物溶液通过喷丝头纺丝成惰性气体,以部分除去纺丝纤维中所含的有机溶剂; 使纺丝纤维与调理溶液接触,以保持纤维中的残留水在10〜15%的范围内。 对经处理的纤维进行拉伸,洗涤和干纺加热。 与传统的芳族聚酰胺纤维的湿法纺丝方法相比,本发明可以大大降低能量消耗和回收溶剂的成本。 此外,由于在纺丝工序中不使用浓硫酸溶剂,本发明可以解决设备腐蚀,工作环境劣化等常规问题。 此外,本发明可以在拉伸前将纤维中的残留水保持在10〜15%的范围内进行拉伸加热,从而显着提高纤维的强度和弹性模量。