H2O2-assisted preparation of superhydrophilic polyacrylonitrile fabric and its application for the separation of oil/water mixture

In this study, the Taguchi method with orthogonal array design was employed to modify polyacrylonitrile (PAN) fabric to endow the material with superhydrophilic performance. FT-IR and XPS analyses proved that after individual treatment of NaOH or H2O2, cyclization/mild-hydrolysis or cyclization/dehy...

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Bibliographic Details
Published in:Colloids and surfaces. A, Physicochemical and engineering aspects Physicochemical and engineering aspects, 2022-08, Vol.646, p.129004, Article 129004
Main Authors: Lv, Chong-Jiang, Hao, Bin, Yasin, Akram, Yue, Xiu, Ma, Peng-Cheng
Format: Article
Language:English
Subjects:
Nonwoven fabric
Oil/water separation
Polyacrylonitrile
Superhydrophilicity
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Summary:In this study, the Taguchi method with orthogonal array design was employed to modify polyacrylonitrile (PAN) fabric to endow the material with superhydrophilic performance. FT-IR and XPS analyses proved that after individual treatment of NaOH or H2O2, cyclization/mild-hydrolysis or cyclization/dehydrogenation occurred on the surface of PAN with slight hydrophilic improvement. Only under the synergy of NaOH@H2O2 mixed system, did the obtained PAN fabric show superhydrophilicity, ascribed to the production of abundant hydrophilic groups (-CONH2 and -COONa) on PAN fibers. Meanwhile, the modified PAN fabric presented enhanced mechanical and thermal stability, and could effectively separate various oil/water mixtures with separation efficiency beyond 99.9% and have a high oil intrusion pressure after wetted by water. The rectified performance of PAN fabric made the material a potential candidate for water purification. A superhydrophilic polyacrylonitrile non-woven fabric treated by low concentration of NaOH@H2O2 mixture for efficiently separating oil/water mixtures was reported. The mechanism of hydrophilic modification was investigated in detail. [Display omitted] •Polyacrylonitrile (PAN) fabric with superhydrophilicity was developed.•Amount of NaOH for preparing hydrophilic PAN was reduced with presence of H2O2.•Mechanism behind the modification of PAN by NaOH@H2O2 was proposed.•Modified PAN showed excellent separation efficiency for various oil/water mixtures.
ISSN:0927-7757
1873-4359
DOI:10.1016/j.colsurfa.2022.129004