Superhydrophilic and superhydrophobic surface from raspberry-like PMMA/M-SiO2 nanocomposite microspheres with dual-level hierarchical structure
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Raspberry-like PMMA/M-SiO2 microspheres with mono- and dual-level hierarchical structure were fabricated by introducing γ-methacryloxypropyltrimethoxysilane (MPS)-functionalized SiO2 particles (M-SiO2) into Pickering emulsion polymerization reaction of methyl methacrylate (MMA). It was found that, with the increase of MPS content, raspberry-like PMMA/M-SiO2 microspheres performed a transition in morphology from mono-level hierarchical structure to dual-level hierarchical structure. A possible mechanism of such morphology transition was also discussed. The superhydrophilic surface with a static contact angle of 0° can be achieved by depositing this dual-level hierarchical structure particles on glass substrate. Further, after the surface treatment with tridecafluoroctyltriethoxysilane (FAS), the fabricated surfaces demonstrated a superhydrophobic properties with high contact angle hysteresis.
Raspberry-like PMMA/M-SiO2 nanocomposites were fabricated by via a sol-gel method and Pickering emulsion polymerization.
With increasing γ-methacryloxypropyltrimethoxysilane (MPS) content, raspberry-like microspheres performed a morphology transition from mono-level hierarchical structure to dual-level hierarchical structure.
The superhydrophilic and superhydrophobic surface were obtained by deposition of this dual-level hierarchical structure particles on glass substrate.
KeywordsRaspberry-like PMMA/M-SiO2 Hierarchical structure Superhydrophilic Superhydrophobic
This work was supported by the National Natural Science Foundation of China (Grant No. 21603077), State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Engineering, Beijing, P.R. China (Grant No. OIC-201801006), and Fundamental Research Funds for the Central Universities (Grant No. JB-ZR1224).
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Conflict of interest
The authors declare that they have no conflict of interest.
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