1. Fluorine-Free Dual Superamphiphobic Cellulose Paper Coated with Mushroom-like Pillar Microstructure.
- Author
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Ke, Xun, Wang, Kaipeng, Zhao, Lihong, Wang, Zhiwei, and Wu, Min
- Subjects
CONTACT angle ,KRAFT paper ,MICROSTRUCTURE ,IRON oxide nanoparticles ,MAGNETIC fields ,CASTOR oil - Abstract
In this work, we report a unique and facile approach to the manufacture of fluorine-free superamphiphobic paper. Based on the principle that Fe
3 O4 nanoparticles (NPs) arranged along the direction of a magnetic field, the mixture of Fe3 O4 NPs and polydimethylsiloxane (PDMS) was coated on kraft paper through self-assembly and thermal-curing at a high temperature in a magnetic field, fabricating a mushroom-like microstructure on the paper. At an Fe3 O4 NPs content of 75%, the radius of the mushroom-like pillar caps (RCAP ) and center-to-center spacing between two pillars (S) obtained the optimal size of 37 ± 18 μm and 237 ± 38 μm, respectively. The oil-contact angle and water-contact angle of the fabricated paper were up to 156° and 160.4°, respectively. It also showed excellent oleophobic stability; the oil-contact angle was still maintained at 141.9° after 1 h. In addition, the contact angles of milk, ethylene glycol and castor oil were all above 150°, and the contact angle of diiodomethane was 134.2°. Moreover, the sample showed great oil resistance with a kit rating value of 12/12 and permeability of 1800+ s. [ABSTRACT FROM AUTHOR]- Published
- 2023
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