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    Phase separation-induced superhydrophobic polylactic acid films

    Year: 2019

    Journal: Soft Matter, Volume 15, DEC 14, page 9500–9506

    Authors: Zhong, Lingqi; Gong, Xiao

    Organizations: National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [21774098]; Open Foundation of the State Key Laboratory of Silicate Materials for Architectures at WUT [SYSJJ2018-04]; Opening Project of State Key Laboratory of Polymer Materials Engineering (Sichuan University)Sichuan University [sklpme2019-4-26]

    Superhydrophobic films that are simple, inexpensive, corrosion-resistant and multifunctional are in high demand for industrial applications. We propose a simple and economical phase separation method for fabricating superhydrophobic films using polylactic acid (PLA), nano-SiO2 and a mixture of good and poor solvents to construct a rough surface with a nano/microstructured morphology. The phase separation-induced superhydrophobic PLA/SiO2 composite film with a porous network structure has a water contact angle greater than 164 degrees. This method can be applied to a variety of surfaces or used in large-scale industrial production. The fabricated superhydrophobic films may be applied in biological fields because PLA is a good biodegradable material.
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