Surface modifying amphiphilic additives and their effect on the fouling-release performance of siloxane-polyurethane coatings. Issue 3 (16th March 2021)

• Record Type: Journal Article
• Authors: Benda, Jackson; Stafslien, Shane; Vanderwal, Lyndsi; Finlay, John A.; Clare, Anthony S.; Webster, Dean C.
• Is Part Of: Biofouling. Volume 37:Issue 3(2021)
• Page Start: 309
• Page End: 326
• Publication Date: 2021-03-16
• Subjects: Surface-modifying -- amphiphilic copolymers -- additives -- siloxane-polyurethane -- fouling-release coatings -- marine coatings; Marine fouling organisms -- Periodicals; Materials -- Biodeterioration -- Periodicals; Fouling -- Periodicals; Biodegradation -- Periodicals; Environmental Microbiology -- Periodicals; Water Microbiology -- Periodicals; 576.165
• DOI: 10.1080/08927014.2021.1901891
• Languages: English
• ISSNs: 0892-7014

Abstract

Abstract: In this work, surface-modifying amphiphilic additives (SMAAs) were synthesized via hydrosilylation using various polymethylhydrosiloxanes (PMHS) and allyl-terminated polyethylene glycol monomethyl ethers (APEG) of varying molecular weights. The additives synthesized were incorporated into a hydrophobic, self-stratifying siloxane-polyurethane (SiPU) coating system to produce an amphiphilic surface. Contact angle experiments and atomic force microscopy (AFM), in a dry and hydrated state, were performed to assess changes in surface wettability and morphology. The antifouling and fouling-release (AF/FR) performances were evaluated by performing laboratory biological assays using the marine bacterium Cellulophaga lytica, the microalga Navicula incerta, the macroalga Ulva linza, the barnacle Amphibalanus amphitrite, and the marine mussel, Geukensia demissa . Several of the formulations showed improved AF/FR performance vs the base SiPU and performed better than some of the commercial standard marine coatings. Formulations containing SMAAs with a low grafting density of relatively high molecular weight PEG chains showed the best performance overall.