Assessments of capsaicin incorporated silicone rubber as antifouling coatings

Abdulhadi A. Al-Juhani, . and Zhang Newby Bi-Min, . Assessments of capsaicin incorporated silicone rubber as antifouling coatings. pp. 173-186. ISSN 1511-1768

Capsaicin a natural pepper extract that is substantially less toxic than most currently used antifoulants such as organotin compounds could be a potential environmentally friendly antifoulant. The antibacterial effectiveness of capsaicin has been reported. However no detailed study on incorporating the compound into silicone coatings has been conducted. In this study capsaicin was incorporated into silicone coatings to achieve a synergistic effect by combining the antifouling properties of capsaicin with the foul release performance of silicone rubbers. The silicones used were polydimethylsiloxane rubbers with two different curing mechanisms. Due to the poisonous effect of capsaicin to Pt-based catalysts used for hydrosilylation curing of some silicone coatings a swelling technique of precured coatings in the capsaicin/benzene solution was utilised. For silicone cured with tin-based catalysts whose catalysis capability was unaffected by capsaicin capsaicin was blended into the coating in the presence of a common solvent. Surface and bulk properties of the capsaicin-incorporated coatings were controlled closely to those of the silicone coatings alone thus minimising their contribution to antifouling. The bacterial attachment studies indicated that all capsaicin-incorporated coatings exhibited initial enhancement in antibacterial performance as compared to coatings containing no capsaicin. However due to the fast leaching of capsaicin and the adverse effect of the increase surface roughness upon water immersion the antibacterial effectiveness for capsaicin incorporated coatings only exhibited for a short period of time.

Full text available from: Official URL: http://vitaldoc.lgm.gov.my:8060/vital/access/servi...

Abstract

Capsaicin a natural pepper extract that is substantially less toxic than most currently used antifoulants such as organotin compounds could be a potential environmentally friendly antifoulant. The antibacterial effectiveness of capsaicin has been reported. However no detailed study on incorporating the compound into silicone coatings has been conducted. In this study capsaicin was incorporated into silicone coatings to achieve a synergistic effect by combining the antifouling properties of capsaicin with the foul release performance of silicone rubbers. The silicones used were polydimethylsiloxane rubbers with two different curing mechanisms. Due to the poisonous effect of capsaicin to Pt-based catalysts used for hydrosilylation curing of some silicone coatings a swelling technique of precured coatings in the capsaicin/benzene solution was utilised. For silicone cured with tin-based catalysts whose catalysis capability was unaffected by capsaicin capsaicin was blended into the coating in the presence of a common solvent. Surface and bulk properties of the capsaicin-incorporated coatings were controlled closely to those of the silicone coatings alone thus minimising their contribution to antifouling. The bacterial attachment studies indicated that all capsaicin-incorporated coatings exhibited initial enhancement in antibacterial performance as compared to coatings containing no capsaicin. However due to the fast leaching of capsaicin and the adverse effect of the increase surface roughness upon water immersion the antibacterial effectiveness for capsaicin incorporated coatings only exhibited for a short period of time.

[error in script]

Item Type:	Article
AGROVOC Term:	Capsaicin
AGROVOC Term:	Rubber
AGROVOC Term:	Pepper
AGROVOC Term:	Organotin compounds
AGROVOC Term:	Antibacterial properties
AGROVOC Term:	Protective coatings
AGROVOC Term:	Curing (processing)
AGROVOC Term:	Poisonous plants
AGROVOC Term:	Swelling
AGROVOC Term:	Catalysis
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/22960

Actions (login required)

View Item