Construction of silicone composite with controllable micro-nano structure via in-situ polymerization on fiber surface and study on SO2 adsorption performance

Micro-nano structure was constructed on the polyester fiber's surface through in-situ polymerization by tri-alkoxysilane containing dicyano and zinc oxide, endowing the fabric with SO2 adsorption performance. The treating conditions, including the selection of solvent, water content in the solvent, and catalysts were investi-gated extensively. Therefore, three distinct first-order rough structures were fabricated, namely, triethylamine catalyzing coating (TEA@PET), triethylenediamine catalyzing coating (DTEA@PET), and tetraethylenepent-amine catalyzing coating (TEPA@PET). Then, based on the primary structure DTEA@PET, the nano-zinc oxide was employed for secondary treatment, and the micro-nano structure (ZnO/CN@PET) with zinc oxide particles attached to the surface of silicone microspheres was fabricated. Combined with the surface's chemical compo-sition assessment and morphology investigation, it was demonstrated that the micro-nano surface consisted of inorganic nano-zinc oxide on the organopolysiloxane micron particles' surface. When the roughness of DTEA@PET was 199 nm, ZnO/CN@PET increased to 229 nm. The SO2 adsorption capacity of DTEA@PET was 28.2 mL/g, while that of ZnO/CN@PET reached 38.6 mL/g, proving that the composite ZnO nanoparticles on micron roughened surface could offer remarkable SO2 adsorption capacity.