Photocatalytic Layer-by-Layer Coatings for Degradation of Acutely Toxic Agents

Autor:	Paula T. Hammond, Kevin C. Krogman, Nicole S. Zacharia, Doris Grillo
Rok vydání:	2008
Předmět:	Inert Materials science Vapor pressure General Chemical Engineering Layer by layer Cationic polymerization General Chemistry Permeation Polyelectrolyte Natural rubber Chemical engineering visual_art Materials Chemistry Photocatalysis visual_art.visual_art_medium Organic chemistry
Zdroj:	Chemistry of Materials. 20:1924-1930
ISSN:	1520-5002 0897-4756
DOI:	10.1021/cm703096w
Popis:	Highly reactive layer-by-layer (LbL) films have been developed as protective coatings intended for application on fibers worn by military personnel. In this work, the anionic species are titanium dioxide nanoparticles ranging from 5 to 10 nm in size, which are prepared in a stable colloidal solution specifically designed for this application, while the cationic species can be one of several traditional synthetic polycations, including weak and strong polyelectrolytes. The resulting coatings are mechanically stable and offer selective protection when the wearer is exposed to UV radiation (e.g.,sunlight); whereas the inherent water transmissive nature of the multilayers allows for much greater water vapor transport rates as compared to an inert rubber barrier material. Permeation tests of coated materials were conducted in a specially engineered cell by exposing the materials to a CWA simulant. In the extreme case, when a coated material is subjected to a saturated vapor of the CWA simulant, UV exposure res...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::07bc9e80ff9b91d988753419d99970e9 https://doi.org/10.1021/cm703096w