Release of VOCs and Particles During Use of Nanofilm Spray Products

Here, we present emission data on VOCs and particles emitted during simulated use of four commercial nanofilm spray products (NFPs) used for making easy-to-clean or self-cleaning surfaces on floors, ceramic ties, and windows. The aim was to characterize the emitted VOCs and to provide specific source strength data for VOCs and particles released to the air during use of the products. Containers with NFP were mounted on a spray-stand inside a closed stainless steel chamber with no air exchange. NFPs were sprayed in amounts corresponding to 1 m(2) surface toward a target plate at a distance of 35 cm, Released VOCs were measured by a combination of air sampling on Tenax TA adsorbent followed by thermal desorption GC/MS and GC/FID analysis and real time measurements using a miniature membrane inlet mass spectrometer, Particles were measured using a fast mobility particle sizer and an aerosol particle sizer. A number of VOCs were identified, including small alcohols, ketones and ethers, chlorinated acetones, a perfluorinated silane, limonene, and cyclic siloxanes, The number of generated particles was on the order of 3 x 10(8) to 2 x 10(10) particles/m(3) per g sprayed NFP and were dominated by nanosize particles.