A superhydrophobic anti-flaming coating with anti-corrosion function for paper-based triboelectric nanogenerator

As an effective way for energy conversion, triboelectric nanogenerators (TENGs) have aroused great attention. Particularly, the paper-based TENGs have been paid the highest emphasize for their unparalleled merits: flexibility, light weight, low cost, and recyclability under heavily allocated environmental protection. To address drawbacks of paper-based TENG (e.c. susceptible to moisture, inflammability), here, an effective superhydrophobic-flame-resistant coating for superhydrophobic and flame-resistant dual-treated paper-based TENG is, firstly, proposed. This coating was obtained by in-situ addition of fire-retardants (polyhedral methyl-silsesquioxane and ammonium polyphosphate) during the process of sol–gel reaction of two silane precursors: tetraethyl orthosilicate (TEOS) and tridecafluorooctyl triethoxysilane (FAS). This superhydrophobic-flame-resistant coating endowed paper-based TENG with excellent surfacial hydrophobicity (water contact angle above 150°) and flame-resistant properties (limit oxygen index improved by 5% compared with original sample), simultaneously. Meanwhile, the coating also exhibits outstanding anti-permeability towards water (keep WCA last more than 1 h) and resistance towards acidic corrosion. The superhydrophobic-flame-resistant modification renders the obtained TENG to work with conventional properties under humidity environment and fire protection. This paper-based TENG feasibly powers LED and alarm apparatus, demonstrating its plausibility for new approach for advanced energy harvest and conversion. As an effective way for energy conversion, triboelectric nanogenerators (TENGs) have aroused great attention. Particularly, the paper-based TENGs have been paid the highest emphasize for their unparalleled merits: flexibility, light weight, low cost, and recyclability under heavily allocated environmental protection. To address drawbacks of paper-based TENG (e.c. susceptible to moisture, inflammability), here, an effective superhydrophobic-flame-resistant coating for superhydrophobic and flame-resistant dual-treated paper-based TENG is, firstly, proposed. This coating was obtained by in-situ addition of fire-retardants (polyhedral methyl-silsesquioxane and ammonium polyphosphate) during the process of sol–gel reaction of two silane precursors: tetraethyl orthosilicate (TEOS) and tridecafluorooctyl triethoxysilane (FAS). This superhydrophobic-flame-resistant coating endowed paper-based TENG with excellent surfacial hydrophobicity (water contact angle above 150°) and flame-resistant properties (limit oxygen index improved by 5% compared with original sample), simultaneously. Meanwhile, the coating also exhibits outstanding anti-permeability towards water (keep WCA last more than 1 h) and resistance towards acidic corrosion. The superhydrophobic-flame-resistant modification renders the obtained TENG to work with conventional properties under humidity environment and fire protection. This paper-based TENG feasibly powers LED and alarm apparatus, demonstrating its plausibility for new approach for advanced energy harvest and conversion.