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    LANTHANIDE FLUORIDE TWO-DIMENSIONAL POROUS NANOSHEETS, AND PREPARATION METHOD AND APPLICATIONS THEREOF
    3.
    发明申请
    LANTHANIDE FLUORIDE TWO-DIMENSIONAL POROUS NANOSHEETS, AND PREPARATION METHOD AND APPLICATIONS THEREOF 审中-公开

    公开(公告)号：US20190322541A1

    公开(公告)日：2019-10-24

    申请号：US16457892

    申请日：2019-06-28

    申请人： TIANJIN POLYTECHNIC UNIVERSITY

    发明人： YUZHONG ZHANG ,  LEITAO ZHANG ,  HONG LI

    IPC分类号： C01F17/00 ,  B01J20/02 ,  B01J20/28 ,  B01J20/30 ,  B01J27/12 ,  B01J35/00 ,  B01J35/10 ,  B01J37/26 ,  B01J37/04 ,  H01M4/58 ,  B01D53/02

    摘要： The present application provides a method for preparing lanthanide fluoride two-dimensional porous nanosheets and belongs to the field of novel materials. In the present application, mixing a water-soluble lanthanide metal salt and an aqueous solution of sodium acetate in a nitrogen atmosphere to obtain a mixed solution, and adding an aqueous solution of fluorine-containing salt to the mixed solution obtained for precipitation reaction to produce lanthanide fluoride two-dimensional porous nanosheets. In the preparation process provided by the present application, no additional surfactant or template agent needs to be added, the pollution of the surfactant to the surface of the prepared material is avoided and the tedious after-treatment steps to template agent are reduced. Accordingly, the large-scale production can be realized, and the lanthanide fluoride two-dimensional porous nanosheets constructed by nanoparticles are prepared in large scale by one step. Moreover, no other organic solvents are required, and the pollution to the environment during the preparation process is avoided.

    Hydrophobic-oleophilic hollow fiber composite membrane and preparing method thereof
    4.
    发明授权
    Hydrophobic-oleophilic hollow fiber composite membrane and preparing method thereof 有权

    公开(公告)号：US10252224B2

    公开(公告)日：2019-04-09

    申请号：US15113256

    申请日：2015-10-29

    申请人： Tianjin Polytechnic University

    发明人： Changfa Xiao ,  Junqiang Hao ,  Jian Zhao ,  Hailiang Liu ,  Qinglin Huang

    IPC分类号： B01D71/34 ,  B01D71/82 ,  C02F1/44 ,  B01D69/08 ,  B01D67/00 ,  B01D69/12 ,  C02F101/32

    摘要： The present invention discloses a hydrophobic-oleophilic and hollow fiber composite membrane and preparing method thereof. A preparing method includes preparing hollow tubular braids by two-dimensional braided technique using polyester filaments, wherein the hollow tubular braids are used as the reinforcements. The method further includes mixing polyvinylidene fluoride, hydrophobic pore-forming agent, and the rest of solvent to prepare a casting solution of surface separation layer. The method further includes pre-treatment processing of the reinforcements; and coating the casting solution of surface separation layer on the outer surface of the processed reinforcements through a spinning spinneret to form a primary membrane. The reinforcements are replaced by the primary after post-processing, and repeating the coating process.

    Method for preparing homogeneous braid-reinforced PPTA hollow fiber membrane
    7.
    发明授权
    Method for preparing homogeneous braid-reinforced PPTA hollow fiber membrane 有权
    均匀编织增强PPTA中空纤维膜的制备方法

    公开(公告)号：US09533266B2

    公开(公告)日：2017-01-03

    申请号：US14857874

    申请日：2015-09-18

    申请人： TIANJIN POLYTECHNIC UNIVERSITY

    发明人： Changfa Xiao ,  Chun Wang ,  Mingxing Chen ,  Qinglin Huang ,  Hailiang Liu

    IPC分类号： B01D67/00 ,  B01D39/00 ,  B01D33/21 ,  B01D69/00 ,  B29C47/00 ,  B29C47/88 ,  B01D71/56 ,  B01D63/02 ,  B01D69/12 ,  B01D69/14

    CPC分类号： B01D71/56 ,  B01D63/027 ,  B01D67/0093 ,  B01D69/08 ,  B01D69/12 ,  B01D69/148 ,  B01D2325/40

    摘要： A method for preparing a homogeneous braid-reinforced (HMR) PPTA hollow fiber membrane combines PPTA hollow tubular braids with PPTA surface separation layer. The method includes following steps of: (1) preparing the PPTA hollow tubular braids, wherein the PPTA hollow tubular braids which are made from PPTA filament yarns are woven by a two-dimensional braided method, the outer diameter of the PPTA tubular braids is 1-2 mm; (2) preparing the PPTA casting solution as the surface separation layer, wherein the 1-3 wt % PPTA resin, 0-2 wt % inorganic particles and 10-20 wt % pore-forming agents are mixed into 75-89% inorganic acid solvent, stirred for 1-3 hours at 70° C.-90° C. to form homogeneous and transparent casting solution; and (3) preparing reinforced PPTA hollow fiber membrane, wherein the casting solution as the surface separation layer is evenly coated on the surfaces of the PPTA hollow tubular braids through spinneret, and they are immersed in a coagulation bath for solidified formation.

    摘要翻译： 制备均匀编织增强（HMR）PPTA中空纤维膜的方法将PPTA中空管状编织物与PPTA表面分离层结合。 该方法包括以下步骤：（1）制备PPTA中空管状编织物，其中由PPTA长丝纱制成的PPTA中空管状编织物通过二维编织方法编织，PPTA管状编织物的外径为1 -2毫米; （2）制备作为表面分离层的PPTA浇铸溶液，其中将1-3重量％PPTA树脂，0-2重量％无机颗粒和10-20重量％成孔剂混合到75-89％无机酸 溶剂，在70℃-90℃下搅拌1-3小时以形成均匀且透明的浇铸溶液; 和（3）制备增强PPTA中空纤维膜，其中作为表面分离层的浇铸溶液通过喷丝头均匀地涂覆在PPTA中空管状编织物的表面上，并将它们浸入凝固浴中以固化形成。

    Hollow tubular oil absorbing material and preparing method thereof
    8.
    发明申请
    Hollow tubular oil absorbing material and preparing method thereof 审中-公开
    中空管状吸油材料及其制备方法

    公开(公告)号：US20160256849A1

    公开(公告)日：2016-09-08

    申请号：US14778102

    申请日：2014-10-28

    申请人： TIANJIN POLYTECHNIC UNIVERSITY

    发明人： Changfa Xiao ,  Zitao Wang ,  Jian Zhao ,  Xioa Hu ,  Qinglin Huang

    IPC分类号： B01J20/02 ,  B01J20/32 ,  B01J20/28 ,  B01J20/26 ,  B01J20/22

    CPC分类号： B01J20/0262 ,  B01J20/20 ,  B01J20/22 ,  B01J20/26 ,  B01J20/28 ,  B01J20/28045 ,  B01J20/28054 ,  B01J20/30 ,  B01J20/3206 ,  B01J20/3208 ,  B01J20/3212 ,  B01J20/3234 ,  C09K3/32

    摘要： A hollow tubular oil absorbing material includes: a core formed by a spring, and an outer shell formed by a flat sponge wrapped at the spring; wherein the flat sponge is fixed at both ends of the spring; the flat sponge fully covers all the spring or is sealed at a first end; a connecting tube is connected at a second end of the spring for communicating with a vacuum pump; a graphene oxide layer is coated at the outer sponge. The graphene oxide layer on the flat sponge of hollow tubular oil absorbing material is formed by immersion and coating under negative pressure. Further the reduction of graphene oxide is performed with hydrazine hydrate steam and followed by washing and drying. Finally, a hollow tubular oil absorbing material with a spring core and an outer grapheme-coated sponge structure is obtained, which can be applied to continuous oil-water separation.

    摘要翻译： 中空管状油吸收材料包括：由弹簧形成的芯和由弹簧包裹的扁平海绵形成的外壳; 其中所述扁平海绵被固定在所述弹簧的两端; 扁平海绵完全覆盖所有弹簧或在第一端密封; 连接管连接在弹簧的第二端，用于与真空泵连通; 在外海绵处涂覆石墨烯氧化物层。 中空管状油吸收材料的扁平海绵上的石墨烯氧化层通过在负压下浸渍和涂覆而形成。 此外，还原石墨烯氧化物是用水合肼蒸汽进行的，随后进行洗涤和干燥。 最后，获得了一种具有弹簧芯和外部刻画海绵结构的中空管状吸油材料，可以应用于连续的油水分离。

    Preparation method of homogeneous-reinforced PVDF hollow fiber membrane
    9.
    发明申请
    Preparation method of homogeneous-reinforced PVDF hollow fiber membrane 审中-公开
    均质增强PVDF中空纤维膜的制备方法

    公开(公告)号：US20150096934A1

    公开(公告)日：2015-04-09

    申请号：US14381213

    申请日：2013-01-24

    申请人： TIANJIN POLYTECHNIC UNIVERSITY

    发明人： Changfa Xiao ,  Xuliang Zhang ,  Xiaoyu Hu ,  Shulin An ,  Qinglin Huang ,  Guolan Huan

    IPC分类号： B01D71/34 ,  B01D63/02 ,  B01D67/00 ,  B01D69/08 ,  B01D69/12

    CPC分类号： B01D71/34 ,  B01D63/02 ,  B01D63/021 ,  B01D67/0013 ,  B01D67/0016 ,  B01D67/002 ,  B01D69/02 ,  B01D69/08 ,  B01D69/088 ,  B01D69/10 ,  B01D69/12 ,  B01D2323/00 ,  B01D2325/40

    摘要： A preparation method of a homogeneous-reinforced PVDF hollow fiber membrane includes steps of: a) preparing a reinforced matrix membrane, wherein a PVDF hollow fiber membrane is utilized as the reinforced matrix membrane; b) preparing a PVDF casting solution, wherein mass fractions of the PVDF casting solution are: PVDF 6˜20 wt %; hydrophilic polymers or hydrophilic inorganic particles 0.6˜2 wt %; pore-forming agent 6˜10 wt %; and solvent 68˜87.4 wt %; mixing the above solutes in a water bath with a temperature of 70˜90° C., dissolving for 3˜4 h with stirring, then deaerating under vacuum for obtaining the uniform PVDF casting solution; and c) preparing the homogeneous-reinforced membrane; wherein the PVDF casting solution is uniformly coated on an outer surface of the reinforced matrix membrane through a spinning spinneret, then the reinforced matrix membrane is towed by a filament guide roller in such a manner that the hollow fiber forms a membrane, then the membrane passes through an air gap with a length of 5˜20 cm and is immersed in ultrafiltered water for coagulation, in such a manner that the homogeneous-reinforced membrane is obtained; wherein a traction speed is 5˜25 cm/(r·min).

    摘要翻译： 均质增强PVDF中空纤维膜的制备方法包括以下步骤：a）制备增强基质膜，其中使用PVDF中空纤维膜作为增强基质膜; b）制备PVDF浇注溶液，其中PVDF浇铸溶液的质量分数为：PVDF 6〜20wt％; 亲水性聚合物或亲水性无机颗粒0.6〜2重量％ 成孔剂6〜10重量％ 和溶剂68〜87.4wt％; 将上述溶质混合在温度为70〜90℃的水浴中，搅拌溶解3〜4h，然后真空脱气，得到均匀的PVDF浇铸溶液; 和c）制备均质增强膜; 其中通过纺丝喷丝头将PVDF铸塑溶液均匀地涂覆在增强基体膜的外表面上，然后用丝导引辊牵引加强基体膜，使得中空纤维形成膜，然后膜通过 通过长度为5〜20cm的气隙，浸渍在超滤水中进行凝固，得到均质增强膜; 牵引速度为5〜25cm /（r·min）。