Hybrid Particles of Polystyrene and Carboxymethyl Cellulose as Substrates for Copper Ions

Abstract

The synthesis of hybrid particles was carried out by emulsion polymerization of styrene in complexes formed by carboxymethyl cellulose (CMC), a polyanion, and a cationic surfactant, cetyltrimethylammonium bromide (CTAB). CMC chains with variable molecular weights and degrees of substitution were tested. The polymerization condition chosen was that corresponding to CMC chains fully saturated with CTAB and to the onset of pure surfactant micelle formation, namely, at the critical aggregation concentration. The hybrid particles were characterized by zeta potential and light scattering measurements. The period of colloidal stability in the ionic strength of 2.0 mol L(-)(1) NaCl was observed visually. Upon increasing the CMC chain length, the particle characteristics remained practically unchanged, but the colloid stability was increased. The increase in the CMC degree of substitution led to particles with more negative zeta potential values. The adsorption of copper ions (Cu(2+)) on the surface of hybrid particles could be described by the Langmuir model, as determined by potentiometric measurements. The increase in the mean zeta potential values and X-ray absorption near-edge spectra evidenced the immobilization of Cu(2+) ions on the hybrid particles.

Immobilization of Hexokinase onto Chitosan Decorated Particles

“…For the polymerization of styrene the cac condition was chosen, in order to use SDS/CH complexes as polymerization sites. One should notice that such complexes are seldom used for polymerization process. − Recently complexes of SDS and poly(ethylene glycol) in microemulsion of pentanol-xylene and water have been applied to grow BaSO 4 particles …”

“…To our knowledge, emulsion polymerization reactions in complex polyelectrolyte/surfactant have seldom been studied. − Marie and co-workers 12 obtained stable polystyrene (PS) particles with a very small amount of coagulum using chitosan in combination with cetyltrimethylammonium chloride. Esquena and co-workers 13 obtained stable PS and poly(methyl methacrylate), PMMA, particles using a polyfructose-based surfactant in the polymerization.…”

Cr(VI) Removal from Aqueous Solution by Chitosan/Carboxylmethyl Cellulose/Silica Hybrid Membrane

“…Because of strong electrostatic interaction between chitosan and sodium carboxymethylcellulose, crosslinking reaction with silane coupling agent occurred at hydroxyl position. Therefore, porous structure in hybrid membrane can be attributed to forming -O-connection between the silicon coupling agent and hydroxyl sites on chitosan and sodium carboxymethyl cellulose [12] [13].…”

“…The composite of CMC/CS has been investigated by some researchers for possible medical applications because of its excellent biocompatibility, biodegradability and hydrophilic [8]- [10]. Some literatures also reported the fabrication of porous CMC/CS membranes and application for pervaporation (PV) dehydration and adsorption metal ion [11] [12].…”

Adsorption behavior and activity of horseradish peroxidase onto polysaccharide-decorated particles

“…PMMA/CMC hybrid particles are formed by PMMA core and CMC as outermost layers [15][16][17], providing hydrophilic carbohydrate rich surfaces. Such particles are excellent substrates for the adsorption of metallic ions [18] and lectins [19,20]. Particle characterization has been performed before and after HRP adsorption by means of dynamic light scattering, zeta potential measurements, scanning electron microscopy.…”