Antifouling character of 'active' hybrid xerogel coatings with sequestered catalysts for the activation of hydrogen peroxide.
Halide-permeable xerogel films prepared from sols containing 50 mol% aminopropyltriethoxysilane (APTES)/50 mol% tetraethoxysilane (TEOS) or 10 mol% APTES/90 mol% TEOS and 0.015 M selenoxide or telluride catalyst in the sol gave reduced settlement of cypris larvae of the barnacle Balanus amphitrite and larvae of the tubeworm Hydroides elegans in the presence of artificial seawater (ASW) and hydrogen peroxide (5-100 microM) relative to glass controls. Settlement of Ulva zoospores was lower on both the 50 mol% APTES/50 mol% TEOS and 10 mol% APTES/90 mol% TEOS xerogel formulations in comparison with glass controls with or without the added catalyst. The 50 mol% APTES/50 mol%TEOS xerogel containing telluride catalyst gave reduced settlement of Ulva zoospores in the presence of 100 microM H(2)O(2) in ASW compared with the same coating without added peroxide. Scanning electron microscopy and XPS data suggest that exposure to H(2)O(2) does not lead to chemical or morphological changes on the xerogel surface.
McMaster
Danielle M
DM
Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York, USA.
Bennett
Stephanie M
SM
Tang
Ying
Y
Finlay
John A
JA
Kowalke
Gregory L
GL
Nedved
Brian
B
Bright
Frank V
FV
Callow
Maureen E
ME
Callow
James A
JA
Wendt
Dean E
DE
Hadfield
Michael G
MG
Detty
Michael R
MR
D000818:Animals; D002384:Catalysis; D005782:Gels / Q000737:chemistry / Q000494:pharmacology; D005898:Glass; D006861:Hydrogen Peroxide / Q000378:metabolism* / Q000494:pharmacology; D008386:Marine Biology; D011077:Polychaeta / Q000187:drug effects* / Q000254:growth & development; D011437:Propylamines; D012821:Silanes / Q000494:pharmacology*; D013499:Surface Properties; D001468:Thoracica / Q000187:drug effects* / Q000254:growth & development; D044445:Ulva / Q000187:drug effects* / Q000254:growth & development
D005782:Gels; D011437:Propylamines; D012821:Silanes; C040733:tetraethoxysilane; D006861:Hydrogen Peroxide; C477625:amino-propyl-triethoxysilane