2010
Synthesis of Copper-polystyrene nanocomposite particles in water in supercritical carbon dioxide (sc-CO2) medium and its antimicrobial activities
I.R. Kamrupi and S.K. Dolui
Copper encapsulated polystyrene nanocomposite particles were prepared through ex-situ dispersion of Cu nanoparticles into monomer droplets and subsequent polymerization using water-in-sc-CO2 at 70oC. First, colloidal dispersion of copper nanoparticles were synthesized by chemical reduction of...
Synthesis of silver-polystyrene nanocomposite particles in water in supercritical carbon dioxide (sc-CO2) medium and its antimicrobial activities
I.R. Kamrupi, P. Phukon, S.K. Dolui and B.K. Konwer
A novel method based on ex situ dispersion of silver nanoparticles within the monomers and subsequent emulsion polymerization using water-in-sc-CO2 medium is introduced in this paper. Silver nanoparticles were synthesized by chemical reduction of silver nitrate using sodium borohydrate as a...
Synthesis of stable dispersion of Copper nanoparticles in a water-in-supercritical carbon dioxide (sc-CO2) using Polydimethyl siloxane (PDMS) as the stabilizer
I.R. Kamrupi and S.K. dolui
Reported herein is the synthesis of stable dispersion copper nanoparticles by chemical reduction of Copper Chloride (CuCl2) in a water-in supercritical carbon dioxide (sc-CO2) medium using sodiumborohydrate (NaBH4) as reducing agent, polydimethylsiloxane (PDMS) as the stabilizer and Sodium...
Synthesis of powdered polymeric microparticles by using supercritical carbon dioxide (sc-CO2) as polymerizing medium
I.R. Kamrupi and S.K. Dolui
We have synthesized microparticles of polymer by emulsion polymerization of styrene in supercritical carbon dioxide (sc-CO2) using (polydimethylsiloxane) (PDMS) as a surfactant/stabilizer and azobisisobutyronitrile (AIBN) as initiator. The emulsion polymerization was carried out at different...
Emulsion polymerization of styrene in supercritical carbon dioxide (sc-CO2) stabilized with (Trifluoromethyl)undecafluorocyclohexane (C7F14)
I.R. Kamrupi, L.J. Borthakur and S.K. Dolui
Herein we report the successful emulsion polymerization of styrene monomers in supercritical carbon dioxide (sc-CO2) using (trifluoromethyl)undecafluorocyclohexane (C7F14) as a stabilizer and azobisisobutyronitrile (AIBN) as initiator. The emulsion polymerization was carried out using different...