Accession Number : AD1022907


Title :   Tailoring the Surface Properties of Coatings Through Self-Stratification


Descriptive Note : Technical Report,01 Apr 2012,31 May 2016


Corporate Author : NORTH DAKOTA STATE UNIV FARGO FARGO United States


Personal Author(s) : Webster ,Dean C


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1022907.pdf


Report Date : 13 Oct 2016


Pagination or Media Count : 224


Abstract : In order to combat biofouling, self-stratified siloxane (PDMS)-polyurethane (PU) coatings have been developed as potential fouling release coatings. To understand the effect of surface damage on the fouling release performance of the coatings, the coatings were abraded using two different Scotch Brite pads with varying roughness, under varying loads. The contact angle and surface energy data showed that the coatings retained their hydrophobicity even after abrasion. The FR performance against microfoulants deteriorated, but the performance of the abraded coatings improved towards barnacles. Based on the results obtained, it was hypothesized that the FR behavior was dependent on the size of the features formed after abrasion, relative to the size of the fouling organism. Analysis of the surface features further supported this hypothesis.


Descriptors :   Siloxanes , POLYURETHANES , BIOFOULING , ABRASION , ROUGHNESS , fouling organisms , ship hulls , antifouling coatings , surface properties , surface chemistry , adhesion , polymeric films , material degradation processes


Distribution Statement : APPROVED FOR PUBLIC RELEASE