公开(公告)号：WO2022067358A1

公开(公告)日：2022-03-31

申请号：PCT/ZA2021/050053

申请日：2021-09-17

Applicant: STELLENBOSCH UNIVERSITY

Inventor： KHAN, Wesaal ,  NDLOVU, Thando ,  CLEMENTS, Tanya Lee ,  MUTTA, Nusrat Begum

IPC: C09D5/14 ,  A01N63/22 ,  A01N63/27 ,  A61L29/08 ,  A61L29/16 ,  C09D5/16

Abstract: The invention provides a coating method for coating a surface of a substrate material with a biosurfactant. The method includes the following steps: modifying the biosurfactant to promote its reactivity with a silane linker; oxidising the surface of the substrate material; functionalising the surface of the substrate material with a silane linker; and reacting the modified biosurfactant with the functionalised surface. The biosurfactant becomes covalently bonded to the surface of the substrate material. The substrate material may be a polymer such as high-density polyethylene or polyvinyl chloride, or a ferrous metal such as stainless steel. The biosurfactant may be produced by one or more bacterial strains selected from the group consisting of Pseudomonas aeruginosa, Bacillus amyloliquefaciens and Serratia marcescens. The invention also provides articles of manufacture which include substrate materials that are at least partially coated with biosurfactants. The substrate materials and biosurfactants may be as described above.