title: Preparation and self-sterilizing properties of Ag@TiO2-styrene-acrylic complex coatings.
abstract: In this study, we report a simple and cost-effective method for self-sterilized complex coatings obtained by Ag@TiO2 particle incorporation into styrene-acrylic latex. The Ag@TiO2 particles were prepared via a coupling agent modification process. The composite latices characterized by transmission electron microscopy (TEM) study were highly homogeneous at the nanometric scale, and the Ag@TiO2 particles were well dispersed and exhibited an intimate contact between both the organic and inorganic components. The Ag@TiO2 nanoparticles significantly enhanced the absorption in the visible region and engendered a good heat-insulating effect of the complex coatings. Moreover, the Ag@TiO2 nanoparticle incorporation into this polymer matrix renders self-sterilized nanocomposite materials upon light excitation, which are tested against Escherichia coli and Staphylococcus aureus. The complex coatings display an impressive performance in the killing of all micro-organisms with a maximum for a Ag@TiO2 loading concentration of 2-5 wt.%. The weathering endurance of the complex coating was also measured.
authors.affiliation: College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, PR China.
authors.forename: Xiang-dong
authors.initials: XD
authors.lastname: Zhou
authors.forename: Feng
authors.initials: F
authors.lastname: Chen
authors.forename: Jin-tao
authors.initials: JT
authors.lastname: Yang
authors.forename: Xiao-hui
authors.initials: XH
authors.lastname: Yan
authors.forename: Ming-qiang
authors.initials: MQ
authors.lastname: Zhong
mesh_terms: D000179:Acrylates / Q000494:pharmacology*; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D020099:Coated Materials, Biocompatible / Q000494:pharmacology*; D004926:Escherichia coli / Q000187:drug effects; D006358:Hot Temperature; D008826:Microbial Sensitivity Tests; D053758:Nanoparticles / Q000648:ultrastructure; D010316:Particle Size; D012834:Silver / Q000494:pharmacology*; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D013211:Staphylococcus aureus / Q000187:drug effects; D055672:Static Electricity; D013242:Sterilization; D020058:Styrene / Q000494:pharmacology*; D014025:Titanium / Q000494:pharmacology*
chemical_list: D000179:Acrylates; D000900:Anti-Bacterial Agents; D020099:Coated Materials, Biocompatible; C009495:titanium dioxide; D012834:Silver; D020058:Styrene; D014025:Titanium; C036658:acrylic acid
keywords: Ag@TiO(2); Antibacterial; Heat-insulation; Styrene–acrylic latex