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Physicochemical and antimicrobial properties of natural rubber latex films in the presence of vegetable oil microemulsions
Author(s) -
Lee Siang Yin,
Ng Angie,
Jaswan Singh Manroshan Singh,
Liew Yun Khoon,
Gan Seng Neon,
Koh Rhun Yian
Publication year - 2017
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.44788
Subject(s) - antimicrobial , ultimate tensile strength , natural rubber , staphylococcus aureus , soybean oil , particle size , escherichia coli , microemulsion , materials science , nuclear chemistry , chemistry , food science , bacteria , composite material , organic chemistry , pulmonary surfactant , biology , biochemistry , gene , genetics
A series of vegetable oil microemulsions are formulated and incorporated into NR latex to study the potent antimicrobial activity of vegetable oil‐plasticized NR latex film against the adherent bacteria on the treated film. The particle size of latex incorporated with 2.50 phr of oil has attained up to 424 nm after incubated at 35 ± 2 °C for 24 h. The tensile stress of all NR latex films are relatively low, ranged 0.289 to 0.511 MPa. All emulsions are found compatible with NR and the low contact angles (<90°) corresponded to no oil blooming onto the surfaces of NR latex films. The crosslink densities are in good correlation with tensile strengths. The potent antimicrobial properties of the NR latex films are investigated from the viability assessment of the adherent tested Escherichia coli ATCC 25922 ( E. coli ATCC 25922) and Staphylococcus aureus ATCC 25923 ( S. aureus ATCC 25923). Results shows that NR latex film incorporated with palm kernel oil/soybean oil blend, NR‐E(P/S = 7/3), has significantly killed the adherent S. aureus with 92.5% reduction but showed no significant log reduction in E. coli . © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44788.