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Simple Preparation of Self‐Cleaning Superhydrophobic PDMS@LDH@PET Fabrics Achieves Efficient Oil‐Water Separation
Summary
A superhydrophobic polyester fabric coated with layered double hydroxide and PDMS achieved a water contact angle of 153° and oil-water separation efficiency of 99.24%, maintaining performance after 40 abrasion cycles and across acidic, alkaline, and solvent conditions. Superhydrophobic membrane materials derived from polyester substrates are relevant to microplastic research both as oil-spill remediation tools in contaminated water bodies and as examples of how synthetic textile surfaces can be engineered to shed rather than retain pollutants.
ABSTRACT Inspired by the lotus leaf effect, a superhydrophobic fabric named PDMS@LDH@PET was successfully prepared through hydrothermal synthesis. This method enabled the controlled growth of layered double hydroxide (LDH) on the surface of a polyester fabric substrate. Following this, a functional coating of poly(dimethylsiloxane) (PDMS) was applied using solution impregnation to efficiently separate oil‐water mixtures. The resulting fabric achieved a contact angle of 153.3 ° ± 2.3 ° , with a separation efficiency as high as 99.24%. The separation flux for n‐hexane reached 17,192.4 L·m −2 ·h −1 . Notably, after 40 cycles of abrasion with 600‐grit sandpaper, the water contact angle remained above 142°, and the separation efficiency stayed above 98% even after 40 separation cycles. The fabric also demonstrated good stability in the presence of acidic and alkaline salts as well as organic solvents. Furthermore, its superhydrophobic properties provide self‐cleaning performance, helping to prevent contamination from sewage and dust.