Title:
SUPERHYDROPHOBIC POLYPROPYLENE POROUS FILM, PREPARATION METHOD THEREFOR, AND METHOD FOR IMPROVING HYDROPHOBICITY OF POLYPROPYLENE POROUS FILM
Document Type and Number:
WIPO Patent Application WO/2021/169253
Kind Code:
A1
Abstract:
A superhydrophobic polypropylene porous film, comprising a polypropylene porous film substrate, a titanium dioxide layer, and a surface modifier layer. The titanium dioxide layer is deposited on the surface of the polypropylene porous film substrate by means of the atomic deposition technology; a surface modifier is coated on the titanium dioxide layer; hydrophobic bonds are formed between the titanium dioxide layer and the surface modifier layer; the water contact angle of the superhydrophobic polypropylene porous film is greater than 150 degrees, the rolling angle is less than 10 degrees, the aperture is 0.1-0.4 μm, the porosity is 50%-80%, the tensile strength is 30-50 MPa, and the elongation at break is 10%-30%. The superhydrophobic polypropylene porous film not only maintains the chemical resistance, rigidity, and porosity of the polypropylene porous film, but also has superhydrophobic properties, and still maintains a good separation effect after working for 80 hours, thus greatly increasing the service life, and reducing operation costs and working costs of a film distillation process.
Inventors:
TANG NA (CN)
SONG YANGYANG (CN)
ZHANG LEI (CN)
SHI XINGXING (CN)
WANG SONGBO (CN)
CHENG PENGGAO (CN)
DU WEI (CN)
ZHANG JIANPING (CN)
SONG YANGYANG (CN)
ZHANG LEI (CN)
SHI XINGXING (CN)
WANG SONGBO (CN)
CHENG PENGGAO (CN)
DU WEI (CN)
ZHANG JIANPING (CN)
Application Number:
PCT/CN2020/115975
Publication Date:
September 02, 2021
Filing Date:
September 17, 2020
Export Citation:
Assignee:
TIANJIN UNIV OF SCIENCE AND TECHNOLOGY (CN)
International Classes:
B01D61/14; B01D71/26; B01D61/36; B01D67/00; B01D69/02
Foreign References:
| CN111282450A | 2020-06-16 | |||
| CN102728238A | 2012-10-17 | |||
| CN102675681A | 2012-09-19 | |||
| CN104888612A | 2015-09-09 | |||
| CN103191855A | 2013-07-10 | |||
| CN107815665A | 2018-03-20 | |||
| GB2514539A | 2014-12-03 |
Other References:
HAN HUAIYUA, ZHANG LEI, FENG CHUNLEI, XIANG JUN, CHENG PENGGAO, TANG NA: "Research on nanometre silicone emulsion modified iPP/TiO2 superhydrophobic and selfcleaning microporous membrane", MEMBRANE SCIENCE AND TECHNOLOGY, vol. 36, no. 3, 25 June 2016 (2016-06-25), pages 41 - 47, XP055841805
XU QIANG, YANG JUN, DAI JIAWEI, YANG YANG, CHEN XIAOQIANG, WANG YONG: "Hydrophilization of porous polypropylene membranes by atomic layer deposition of TiO2 for simultaneously improved permeability and selectivity", JOURNAL OF MEMBRANE SCIENCE, ELSEVIER BV, NL, vol. 448, 1 December 2013 (2013-12-01), NL, pages 215 - 222, XP055841810, ISSN: 0376-7388, DOI: 10.1016/j.memsci.2013.08.018
XU QIANG, YANG JUN, DAI JIAWEI, YANG YANG, CHEN XIAOQIANG, WANG YONG: "Hydrophilization of porous polypropylene membranes by atomic layer deposition of TiO2 for simultaneously improved permeability and selectivity", JOURNAL OF MEMBRANE SCIENCE, ELSEVIER BV, NL, vol. 448, 1 December 2013 (2013-12-01), NL, pages 215 - 222, XP055841810, ISSN: 0376-7388, DOI: 10.1016/j.memsci.2013.08.018
Attorney, Agent or Firm:
BEIJING LINGZHUAN INTELLECTUAL PROPERTY AGENCY CO., LTD et al. (CN)
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