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M. D. García - One of the best experts on this subject based on the ideXlab platform.

Pramuan Tangboriboonrat - One of the best experts on this subject based on the ideXlab platform.

  • Composite Particles of Disinfectant Nanocapsules-Skim Rubber Latex
    International Journal of Polymer Analysis and Characterization, 2010
    Co-Authors: Chariya Kaewsaneha, Duangporn Polpanich, Srung Smanmoo, Pakorn Opaprakasit, Pramuan Tangboriboonrat
    Abstract:

    Skim latex, a by-product of natural rubber latex, was prevulcanized by sulfur and then used in the preparation of composite particles with Disinfectant nanocapsules. Each polymeric nanocapsule contained chlorhexidine digluconate (CHD) as a Disinfectant Agent encapsulated with poly(methyl acrylate) (PMA) as a shell. The driving force for the heterocoagulation of CHD-PMA nanocapsule and sulfur-prevulcanized skim (SPVS) particle was the electrostatic interaction between the positive charge of lecithin residing on the surface of the nanocapsule and the negative charge from the indigenous surfactant (protein-lipid) and/or from sodium dodecyl sulfate on the surface of the SPVS latex particle. The zeta potential and morphology of heterocoagulated particles indicated the formation of the CHD-PMA/SPVS composite particles. Structures and formation mechanisms of the composite particles with different blend ratios were revealed by depth profiling confocal Raman spectra.

  • Preparation of core-shell particle of Disinfectant Agent nanocapsules-skim rubber particles by the heterocoagulation technique
    Macromolecular Research, 2010
    Co-Authors: Chariya Kaewsaneha, Pramuan Tangboriboonrat, Duangporn Polpanich, Srung Smanmoo
    Abstract:

    Sulphur-prevulcanised skim (SPVS) rubber particles were heterocoagulated on an aggregate of a Disinfectant Agent (chlorhexidine digluconate; CHD)-poly(methyl acrylate) (PMA) nanocapsules. The CHD-PMA nanocapsule stabilized by lecithin was prepared using the modified nanoprecipitation of PMA from an organic continuous phase onto nanodroplet containing the CHD aqueous solution. Cationic and anionic nanocapsules were produced by separately redispersing the nanocapsules into a water and 0.5% sodium dodecyl sulphate (SDS) aqueous solution, respectively. The largest aggregate, which was obtained from homocoagulation of the CHD-PMA nanocapsules with opposite charges, was selected as a core surrounded with SPVS shell particles. An interpolymer complex between poly(ethylene oxide) (PEO) moieties adsorbed on the aggregate and indigenous surfactant (protein-lipid) and/or SDS on the SPVS particle surface was the driving force for heterocoagulation. Data from the size, zeta potential measurements and TEM images of the heterocoagulated CHD-PMA/SPVS indicated the composite particle containing the CHD-PMA core.

  • Polymeric Disinfectant nanocapsules: effect of molecular weight of poly(methyl acrylate).
    Journal of biomedical nanotechnology, 2010
    Co-Authors: Saovaree Tanpantree, Srung Smanmoo, Duangporn Polpanich, Pakorn Opaprakasit, Pramuan Tangboriboonrat
    Abstract:

    Poly(methyl acrylate) (PMA) of various weight average molecular weights (Mw) were synthesized via the iniferter route and applied for the encapsulation of Disinfectant Agent (chlorhexidine digluconate; CHD) by using the controlled precipitation technique. The encapsulation efficiency of CHD-PMA nanocapsules suspended in cyclohexane increased from 70 to 100% when the Mw of PMA increased from 40 K to 550 K. After redispersing the capsules into 0.5% w/v of sodium dodecyl sulphate aqueous solution, the maximum content of CHD in the nanocapsules remained >90%. Transmission electron micrographs showed the spherical nanocapsule with continuous intact shell.

  • Nanocapsules embedded in natural rubber latex gloves
    Journal of Applied Polymer Science, 2010
    Co-Authors: Saovaree Tanpantree, Pakorn Opaprakasit, Surapich Loykulnant, Wiyong Kangwansupamonkon, Pramuan Tangboriboonrat
    Abstract:

    To prepare medical gloves containing Disinfectant Agent, poly(methyl acrylate) (PMA) with w of 550 K was synthesized via the iniferter technique and then used for encapsulating Disinfectant Agent, i.e., chlorhexidine digluconate (CHD), droplets. The CHD-PMA nanocapsules suspended in a sodium dodecyl sulfate aqueous solution having 93% encapsulation efficiency were successfully embedded between the outermost and inner layers of γ-radiation vulcanized natural rubber (RVNR) latex films by the coagulant dipping process. A RVNR/CHD-PMA nanocapsules/RVNR three-layer structure was revealed by the contact angle measurement, ATR-FTIR and SEM. Both the tensile strength and elongation at break of the three-layer film were also measured. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010

  • Deposition of Disinfectant poly(methyl acrylate) nanocapsules onto natural rubber film via the layer‐by‐layer technique
    Journal of Applied Polymer Science, 2009
    Co-Authors: Umaporn Paiphansiri, Pramuan Tangboriboonrat
    Abstract:

    An aqueous core containing a Disinfectant Agent (chlorhexidine digluconate) was encapsulated in a poly(methyl acrylate) shell with a modified nanoprecipitation technique. After redispersion of the capsules in an aqueous medium, the remaining amount of the Disinfectant Agent was as high as 90%. The nanocapsules were successfully adsorbed via the layer-by-layer technique onto a γ-radiation-vulcanized natural rubber latex sheet. Water contact angle measurements and scanning electron microscopy confirmed the presence of nanocapsules on the rubber surface. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009

M. T. Saenz - One of the best experts on this subject based on the ideXlab platform.

M. P. Tornos - One of the best experts on this subject based on the ideXlab platform.

Antonio Merchán Alvarez - One of the best experts on this subject based on the ideXlab platform.