Abstract
Antimicrobial activity of silver composites obtained from crosslinked polystyrene with polyHIPE structures
Highlights
The literature indicates that high internal phase emulsions (HIPEs) can be employed as templates for porous polymers, generating polyHIPE structures[1]
HIPEs based on styrene-divinylbenzene (Sty-DVB) were suspended in an aqueous suspension phase containing as stabilizer poly(vinyl alcohol) (PVA) or polyvinylpyrrolidone (PVP) to prepare polyHIPEs
Silver composites were prepared by impregnation of silver particles in polyHIPEs of styrene-divinylbenzene
Summary
The literature indicates that high internal phase emulsions (HIPEs) (containing more than 74 vol% of internal phase) can be employed as templates for porous polymers, generating polyHIPE structures[1]. The polymerization of HIPEs by employing aqueous suspension polymerization, referred as waterin-oil-in-water polymerization (W/O/W), can generate spherical particles with an open porous morphology with pores connecting larger cavities (windows)[10] This type of morphology can favor access of reactants and products through the internal structure of the polymer[15,16], contributing to reduction of mass transfer limitations, especially intraparticle diffusion, and allow the development of more efficient materials. Among the studies involving the preparation of silver composites from crosslinked copolymers can be cited the works of Gangadharan et al.[21] Santa Maria et al.[22], Mthombeni et al.[23] and Mandu et al.[20] In these studies, the antimicrobial activity of the final products was evaluated by different strategies. Gangadharan et al.[21] developed a silver nanocomposite through impregnation
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