Stimuli-Responsive Track-Etched Membranes for Separation of Water-Oil Emulsions

被引：7

作者：

Muslimova, Indira B. ^{[1
,2
]}

Zhatkanbayeva, Zh K. ^{[1
]}

Omertasov, Dias D. ^{[1
]}

Melnikova, Galina B. ^{[1
,3
]}

Yeszhanov, Arman B. ^{[1
,2
]}

Guven, Olgun ^{[4
]}

Chizhik, Sergei A. ^{[3
]}

Zdorovets, Maxim V. ^{[1
,2
,5
]}

Korolkov, Ilya V. ^{[1
,2
]}

机构：

[1] LN Gumilyov Eurasian Natl Univ, Lab Engn Profile, Satpaev Str 5, Astana 010008, Kazakhstan

[2] Inst Nucl Phys, Ibragimov Str 1, Alma Ata 050032, Kazakhstan

[3] Natl Acad Sci Belarus, AV Luikov Heat & Mass Transfer Inst, P Brovki Str 15, Minsk 220072, BELARUS

[4] Hacettepe Univ, Dept Chem, TR-06800 Ankara, Turkiye

[5] Ural Fed Univ, Dept Intelligent Informat Technol, Mira Str 19, Ekaterinburg 620002, Russia

来源：

MEMBRANES | 2023年 / 13卷 / 05期

关键词：

stimuli-responsive polymers; block copolymerization; track-etched membranes; surface modification; graft polymerization; water-oil emulsions separation; WETTABILITY; FABRICATION; EFFICIENCY; SURFACE; MESH;

D O I：

10.3390/membranes13050523

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

In this work, we have developed a method for the preparation of pH-responsive tracketched membranes (TeMs) based on poly(ethylene terephthalate) (PET) with pore diameters of 2.0 +/- 0.1 mu mof cylindrical shape by RAFT block copolymerization of styrene (ST) and 4-vinylpyridine (4-VP) to be used in the separation of water-oil emulsions. The influence of the monomer concentration (1-4 vol%), the molar ratio of RAFT agent: initiator (1:2-1:100) and the grafting time (30-120 min) on the contact angle (CA) was studied. The optimal conditions for ST and 4-VP grafting were found. The obtained membranes showed pH-responsive properties: at pH 7-9, the membrane was hydrophobic with a CA of 95 degrees at pH 2, the CA decreased to 52ffi, which was due to the protonated grafted layer of poly-4-vinylpyridine (P4VP), which had an isoelectric point of pI = 3.2. The obtained membranes with controlled hydrophobic-hydrophilic properties were tested by separating the direct and reverse "oil-water" emulsions. The stability of the hydrophobic membrane was studied for 8 cycles. The degree of purification was in the range of 95-100%.

引用

页数：18

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