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Chinese Nuo mask is made up of wooden substrate and colorful paint, in which wooden substrate exhibits high hydrophilicity and paint cannot show a hydrophobicity. To achieve long-term non-destructive hydrophobic protection of Nuo mask surface, here, epoxy-based nanohybrid coatings were prepared. Poly(glycidyl methacrylate) (PGMA) matrix was used for strong interfacial adhesion and good transparency. Silica nanofiller was used for good weather resistance and high surface roughness. Here, PGMA/silica composite coatings on Nuo mask surfaces were prepared. The reduced water wettability and well-maintained color of coating/mask composite surfaces were verified. Strong abrasion and ultraviolet (UV) resistances of optimal coating/mask composite surface were found. Optimal PGMA/silica composite (2 wt% silica) has high light transmittance (> 89%), and hydrophobicity is achieved on optimal coating/mask composite surface with water static contact angle (SCA) of 93.1° ± 1.1°. This surface displays color difference (ΔE) of 1.9 ± 0.1. This surface after 50 abrasion cycles (ΔE of 2.4 ± 0.1) still exhibits higher SCA (65.5° ± 1.1°) than untreated Nuo mask surface without abrasion (~ 32°). This surface after 24 h of UV exposure possesses SCA of 85.2° ± 1.3° with ΔE of 0.2 ± 0.1. This work enables long-lasting hydrophobic protection of traditional mask surfaces. [ABSTRACT FROM AUTHOR]

Cool linen is used to produce summer clothing to be known as summer cloth. Nevertheless, ramie-fiber surfaces bear hydrophilic hydroxyls to result in rainwater wetting and stain adhering. To achieve outdoor application of summer cloth, here, light all-organic hydrophobic copolymer coatings were formed on surfaces of two various summer clothes. First, atom transfer radical polymerization was utilized to synthesize polydimethylsiloxane-block-polymethacryloxypropyl trimethoxysilane. Then, neat copolymer films and copolymer coating/cloth complexes were prepared. Coating/cloth complexes were characterized. Finally, hydrophobicity-induced antifouling properties of complexes were confirmed, followed by justifying good resistance to surface abrasion for coating/compact summer cloth complex with superhydrophobicity. As a result, the optimal coating/compact summer cloth complex can fight against ink pollution and exhibit a water contact angle of 150.3 degrees after 200 abrasion cycles, in which neat copolymer film has a light transmittance of ~ 90% based on 30 min of pre-hydrolysis. Superhydrophobicity is ascribed to silicon surface enriching-induced low surface energy as well as surface micro-/nano-binary composite rough structure. This work has realized a controllable preparation of silicon-bearing copolymers with long-term hydrophobicity for protecting various summer clothes. [ABSTRACT FROM AUTHOR]