Durable superhydrophobic cotton fabric decorated with pyrogallol-based polybenzoxazine and Fe3O4 for effective oil–water mixtures and emulsions separation

To develop a durable superhydrophobic cotton fabric (CF) for effectively separating oil/water mixtures, a pyrogallol-based polybenzoxazine with abundant hydroxyl groups (PPG-D) and Fe 3 O 4 were adopted to decorate CF. Meanwhile, a commercial benzoxazine based on bisphenol A and aniline (BA-a) was a...

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Bibliographic Details
Published in:Journal of polymer research 2023-12, Vol.30 (12), Article 451
Main Authors: Du, Yonggang, Zhu, Yongfei, Li, Yuxuan, Xiao, Jianrui, Wang, Zhi
Format: Article
Language:English
Subjects:
Abrasion
Aniline
Benzoxazines
Bisphenol A
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Contact angle
Cotton
Cotton fabrics
Dip coatings
Efficiency
Emulsions
Hydrophobic surfaces
Hydrophobicity
Hydroxyl groups
Immersion coating
Industrial Chemistry/Chemical Engineering
Iron oxides
Mixtures
Original Paper
Polybenzoxazines
Polymer Sciences
Separation
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Summary:To develop a durable superhydrophobic cotton fabric (CF) for effectively separating oil/water mixtures, a pyrogallol-based polybenzoxazine with abundant hydroxyl groups (PPG-D) and Fe 3 O 4 were adopted to decorate CF. Meanwhile, a commercial benzoxazine based on bisphenol A and aniline (BA-a) was also incorporated to enhance the application potential of superhydrophobic CF. As expected, a durable superhydrophobic cotton fabric (PPG-D@PBA-a@Fe 3 O 4 @CF) with a water contact angle (WCA) of 154° was successfully fabricated via a facile dip-coating method. PPG-D@PBA-a@Fe 3 O 4 @CF not only could effectively separate immiscible oil–water mixtures with a high permeation flux of up to 12207 L/m 2 h and separation efficiency of above 98.8%, but also displayed a satisfactory separation ability for surfactant-stabilized water-in-oil emulsions with a separation efficiency of over 99.8% and high flux in the range of 4971–8281 L/m 2 h, and the modified CF remained a superior separation efficiency and flux even after 20 separation cycles. In addition, PPG-D@PBA-a@Fe 3 O 4 @CF also displayed outstanding mechanical and chemical stability as well as excellent self-cleaning ability, and the WCA of modified CF could reach 148° even after 100 abrasion cycles. These excellent characteristics make PPG-D@PBA-a@Fe 3 O 4 @CF have a promising application in oil–water separation.
ISSN:1022-9760
1572-8935
DOI:10.1007/s10965-023-03831-2