Antimicrobial Porous Surfaces Prepared by Breath Figures Approach



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Muñoz-Bonilla, Alexandra and Cuervo Rodríguez, Rocío and López-Fabal, Fátima and Gómez-Garcés, José and Fernández-García, Marta (2018) Antimicrobial Porous Surfaces Prepared by Breath Figures Approach. Materials, 11 (8). p. 1266. ISSN 1996-1944

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Herein, efficient antimicrobial porous surfaces were prepared by breath figures approach from polymer solutions containing low content of block copolymers with high positive charge density. In brief, those block copolymers, which were used as additives, are composed of a polystyrene segment and a large antimicrobial block bearing flexible side chain with 1,3-thiazolium and 1,2,3-triazolium groups, PS54-b-PTTBM-M44, PS54-b-PTTBM-B44, having different alkyl groups, methyl or butyl, respectively. The antimicrobial block copolymers were blended with commercial polystyrene in very low proportions, from 3 to 9 wt %, and solubilized in THF. From these solutions, ordered porous films functionalized with antimicrobial cationic copolymers were fabricated, and the influence of alkylating agent and the amount of copolymer in the blend was investigated. Narrow pore size distribution was obtained for all the samples with pore diameters between 5 and 11 µm. The size of the pore decreased as the hydrophilicity of the system increased; thus, either as the content of copolymer was augmented in the blend or as the copolymers were quaternized with methyl iodide. The resulting porous polystyrene surfaces functionalized with low content of antimicrobial copolymers exhibited remarkable antibacterial efficiencies against Gram positive bacteria Staphylococcus aureus, and Candida parapsilosis fungi as microbial models.

Item Type:Article
Uncontrolled Keywords:antimicrobial coatings; porous surfaces; breath figures
Subjects:Sciences > Chemistry > Chemistry, Organic
ID Code:66534
Deposited On:05 Jul 2021 14:41
Last Modified:06 Jul 2021 10:59

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