Encapsulation of Silver Nanoparticles in a Polystyrene Matrix by Miniemulsion Polymerization and Its Antimicrobial Activity

Betancourt-Galindo, R.; Miranda, C. Cabrera; Urbina, Bertha A. Puente; Castañeda-Facio, Adali O.; Sánchez-Valdés, S.; Padilla, Julianna; Cerda, L. A. García; Perera, Y; Rodríguez‐Fernández, Oliverio

doi:10.5402/2012/186851

Cited by 19 publications

(9 citation statements)

References 23 publications

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“…2 is shown the IR absorption spectra of PS film. The main vibrational bands of PS founded in this work are in concordance with the literature [20] , [21]. The bands in 3058 cm -1 and 3024 cm -1 are attributed to the C─H aromatic stretching vibration.…”

Section: Resultssupporting

confidence: 91%

Investigation of the Ultraviolet Irradiation on Blend Films of PS/PCL

Segundo

Moraes

Levy

et al. 2021

EJERS

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In this work, an investigation was carried out on the effect of ultraviolet light on different films. Polystyrene (PS), poly (caprolactone) (PCL), and blended films of PS/PCL were produced. Ethyl acetate (AE) was used as a solvent, and PS and PCL solutions were prepared by dissolving 250 mg in 2.5mL of AE under mechanical stirring at room temperature. The blended solutions of PS/PCL (PS:PCL) were prepared with different mass proportions, such as 90:10, 80:20, 70:30, and 60:40 into 2.5 mL of EA. The solutions were dripped with 500 µL on a glass substrate, and the films were produced with mechanical rotation of N=2000 RPM for 15 seconds using a Spin coater. The films were submitted to ultraviolet light for t=60 minutes and morphologically analyzed by optical microscopy, chemically by IR spectroscopy, and superficially by contact angle and wettability; this last analysis also investigated the effect of ultraviolet light at t=0, t=30, and t=60 minutes. The exposure of ultraviolet light on the films affected its morphologies. IR spectra showed that the photodegradation increased for larger PCL amounts into the blend. The contact angle measurements showed that after exposure to ultraviolet light, the hydrophobicity of the films increased. Therefore, the presence of PCL in the polymer mixture promoted the photodegradation of the PS/PCL films, making it attractive for developing new packaging.

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Section: Resultssupporting

confidence: 91%

Investigation of the Ultraviolet Irradiation on Blend Films of PS/PCL

Segundo

Moraes

Levy

et al. 2021

EJERS

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“…coated with tri‐block copolymers of dimethylaminoethyl methacrylate . The polystyrene‐silver nanoparticles were modified for antimicrobial activity against Escherichia coli and Staphylococcus aureus …”

Section: Introductionmentioning

confidence: 99%

“…[13] The polystyrene-silver nanoparticles were modified for antimicrobial activity against Escherichia coli and Staphylococcus aureus. [14,15] The objective of the present work was to evaluate the potential use of chitosan and polystyrene nanoparticles as an additive for antibacterial property on cotton fabrics. Batch experiments were conducted to prepare the optimum coating conditions via a pad-dry-cure process.…”

Section: Introductionmentioning

confidence: 99%

Potential Antibacterial Activity of Polystyrene Nanoparticles/Chitosan Coated on Cotton Fabrics

Siralertmukul

Watcharamul

Wicheanpaisan

et al. 2015

Macromolecular Symposia

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Summary: This research is to study the potential of using polystyrene nanoparticles and chitosan solution to increase the anti-bacterial activity on cotton fabrics prepared by a conventional pad-dry-cure method. Firstly, cotton fabrics were coated with chitosan solutions at the concentrations of 0.1, 0.5, and 1.0 (%w/v) and tested for the antibacterial property which was determined by clear zone measurement and viable count assay using Escherichia coli (ATCC 25922) as a tested microorganism. The results showed that, the percentage bacterial reductions were 87.2, 86.3, and 48.5%, respectively, when the cotton fabrics was coated only with chitosan solution. When polystyrene nanoparticle solution was coated onto cotton fabrics prior to coating with chitosan solutions at the concentrations of 0.1, 0.5, and 1.0 (%w/v), the percentage bacterial reductions were 90.3, 90.8, and 65.5%, respectively. This indicated that coating the cotton fabrics with polystyrene nanoparticles prior to chitosan coating would remarkably increase the antibacterial activity. The scanning electron micrographs showed that polystyrene nanoparticles were aggregated and inserted in between the interfiber spacings. The thin film of chitosan was also observed on the surface of cotton fabrics and hydrophobic property of the fabrics was tested via contact angle measurement.

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“…The reaction was terminated by cooling the reaction system to room temperature. The conversion ratio of monomer to polymer was determined gravimetrically, according to

C = \frac{M_{2} - M_{1} \times W_{2}}{M_{1} \times W_{1}} \times 100 %

where C is the monomer conversion, M 1 is the mass of the sample before drying, M 2 is the mass of the sample after drying, W 1 is the weight percentage of the monomers in the reaction, and W 2 is the weight percentage of nonvolatile matter (such as PVA, BPO, TDM, TMPTS, nano‐Si) in the reactor.…”

Section: Methodsmentioning

confidence: 99%

Preparation of hybrid composite microspheres containing nanosilicon via microsuspension polymerization

Liu

Wang

Zhou

et al. 2015

J of Applied Polymer Sci

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Hybrid composite microspheres with nano-Si as the core and poly(styrene-co-acrylonitrile) as a shell are successfully prepared by a two-step polymerization technique, which includes dispersion polymerization of styrene and 3-methacryloxypropyl trimethoxysilane in ethanol for surface modification of nano-Si followed by microsuspension polymerization of styrene and acrylonitrile in an aqueous phase for encapsulating nano-Si into an SAN copolymer matrix. The structure and surface properties of modified nanoSi are investigated by Fourier transform infrared spectroscopy (FTIR) and contact angle. The hybrid composite microspheres are systematically characterized by energy dispersive spectroscopy, thermogravimetric analysis, and transmission electron microscopy (TEM). According to the FTIR spectra and the contact angle experiments, it was determined that a hydrophobic polymer layer was formed on the surface of nano-Si. TEM showed that nano-Si was homogeneously dispersed in SAN particles when the loading capacity of nano-Si in the hybrid composite microspheres was less than 20 wt %. Moreover, scanning electron microscopy and X-ray photoelectron spectroscopy revealed that there were large amounts of nano-Si absorbed on the surface of the hybrid composite microspheres, and the mean particle size became much larger when the loading amounts of nano-Si reached 25 wt %. From this, it can be inferred that nano-Si overflows from the inner core to the outside surface in the emulsification process and acts as an inorganic dispersant.

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Encapsulation of Silver Nanoparticles in a Polystyrene Matrix by Miniemulsion Polymerization and Its Antimicrobial Activity

Cited by 19 publications

References 23 publications

Investigation of the Ultraviolet Irradiation on Blend Films of PS/PCL

Investigation of the Ultraviolet Irradiation on Blend Films of PS/PCL

Potential Antibacterial Activity of Polystyrene Nanoparticles/Chitosan Coated on Cotton Fabrics

Preparation of hybrid composite microspheres containing nanosilicon via microsuspension polymerization

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