Thiol-Functionalized TiO₂ as Reactive Nanoadsorbents for Residual Monomer Removal from Waterborne Polymer Dispersions.

ABSTRACT: This study explores the use of thiol-functionalized TiO₂ nanoparticles to reduce residual methyl methacrylate (MMA) and butyl acrylate (BA) monomers in waterborne polymer dispersions (latexes). TiO₂ nanoparticles were modified with (3-mercaptopropyl)-triethoxysilane (MPTES) to introduce -SH groups capable of thiol-ene type reaction with CC bonds of monomers. The effects of functionalization density, nanoparticle concentration, and mixing time on monomer removal were systematically evaluated. Compared with unmodified TiO₂, MPTES-modified nanoparticles achieved up to 90% removal of MMA and nearly complete removal of BA, lowering total residual monomer content from ∼1900 ppm to 120 ppm. About 80-90% of the adsorbed monomers were chemically, thus, irreversibly

SUBMITTER: Trajcheva A 

PROVIDER: S-EPMC12856996 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature