Preparation of a composite of polyacrylate and nano‐SiO₂ particles and evaluation of its performance of oil–water mixture treatment

Abstract

To acquire a material with simultaneous oil–water emulsion demulsification and oil‐absorbing performance, SiO2 nanoparticles were introduced into the acrylate polymerization system to prepare oil absorbent SiO2/P (SMA‐co‐MMA‐co‐BA) (PSA‐SiO2). PSA‐SiO2 was synthesized from monomers and functional materials, including methyl methacrylate (MMA), butyl acrylate (BA), octadecyl methacrylate (SMA) and SiO2 hydrophobically modified by vinyltrimethoxysilane. The molecular structure of PSA‐SiO2 was characterized by FT‐IR, and its morphology was observed using scanning electron microscopy. In addition, the optimal synthesis conditions for the polymerization system, such as the monomer ratio, the amount of crosslinker and stabilizer and then the particle size and dose of SiO2, were discussed in detail. PSA‐SiO2 had a decent oil absorbency for pure halogenated and aromatic hydrocarbons (49.10, 56.41, 47.32, 43.45, 36.22, and 30.14 g/g for CH2Cl2, CHCl3, CCl4, C2Cl4, toluene and styrene, respectively). Furthermore, SiO2, as a functional material, makes composites that possess excellent demulsification properties for oil‐in‐water emulsions. The oil removal efficiency of CHCl3 in Tween 80‐stabilized and CTAB‐stabilized emulsions were 94.88% and 98.11%, respectively. All results indicated that PSA‐SiO2 had valuable potential for oil removal and emulsion treatment.Highlights An organic–inorganic composite was synthesized by suspension polymerization. The composite was applied for absorbing pure oil or removing oil form water. By modification, the composite acquired the demulsification ability. The composite accomplished one‐step demulsification and emulsion treatment. The oil absorption and emulsion treatment could achieve at room temperature.

Enhancing Film Cross-Linking through VTES Copolymerization in Polymer Latex for Increasing Controlled-Release Performance of Film-Coated Fertilizer Granules

“…Vinyl alkoxysilane is a silane coupling reagent that participates in both free radical polymerization and hydrolytic condensation reactions. When copolymerized with acrylate and other monomers, the silane groups hydrolyzed from the alkoxysilane can undergo condensation reactions, thereby increasing the cross-linking density of the film. − In this study, styrene-acrylate latex was employed as the coating material, which is a widely used industrial product and has a relatively low cost and good film-forming performance. Vinyltriethoxysilane (VTES) was employed as the copolymerization monomer, with the silane groups designed as cross-linking sites in the latex film through seeded emulsion polymerization.…”