Antibacterial coatings on vegetable ivory obtained by cold plasma jet activation of silicone and copaiba oils. Issue 9 (4th May 2020)

• Record Type: Journal Article
• Authors: Ferreira da Silva, Yuri; Queiroz, Vanessa de M.; Kling, Isabelle C. S.; Archanjo, Braulio S.; Oliveira, Renata N.; Simao, Renata A.
• Is Part Of: Plasma processes and polymers. Volume 17:Issue 9(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-05-04
• Subjects: antibacterial coatings -- copaiba oil -- plasma jet -- silicone oil -- vegetable ivory; Plasma polymerization -- Periodicals; Plasma-enhanced chemical vapor deposition -- Periodicals; Plasma chemistry -- Periodicals
• DOI: 10.1002/ppap.202000035
• Languages: English
• ISSNs: 1612-8850

Abstract

Abstract: Vegetable ivory obtained from the endosperm of jarina seeds ( Phytelephas macrocarpa ), native to the Amazon region, has been regarded as a sustainable alternative to elephant ivory; however, it is vulnerable to biodegradation due to its mannan polysaccharide composition. In this study, vegetable ivory was coated by atmospheric air plasma jet activation of silicone and copaiba oils. Stable, smooth, and crosslinked micrometric coatings were formed after 80 s of plasma activation. Water contact angle results show that hydrophobicity was enhanced without detrimental effects on the surface reflectance. The best antibacterial performance against Staphylococcus aureus and Escherichia coli was obtained for a 1:1 mixture of both oils due to the synergetic action of silicone hydrophobicity and copaiba bioactivity. Abstract : In this study, an air plasma jet was employed to activate and crosslink a mixture of silicone and copaiba oils for obtaining hydrophobic and antibacterial coatings on vegetable ivory. This material, obtained from the endosperm of Amazonian seeds, has been regarded as a sustainable alternative to ivory; however, its mannan polysaccharide composition renders it hydrophilic and vulnerable to biodegradation.