title: Modification of regenerated cellulose membrane based on thiol dendrimer.
abstract: This work describes the modification of a highly swollen commercial regenerated cellulose (RC) membrane with a dendritic molecule (thiol DAB dendrimer of generation 3) by the dip coating method, and its possible use in electrochemical systems with saline solutions fluxes. Moreover, cellulosic membrane modification with dendrimer covered-CdSe quantum dot was also performed, since it allows dendrimer assortment by fluorescence. Changes in electrical, mechanical and diffusive membrane parameters were determined by impedance spectroscopy, elasticity curves and diffusional permeability measurements. The results indicate a reduction in the free volume of the RC chains in the original membrane associated with the thiol dendrimer inclusion, which reduces diffusive permeability. This demonstrates the possibility of using the thiol dendrimer-modified membrane in low/medium concentration level (0.001M/0.01M) devices with NaCl and PbCl2 solutions.
authors.affiliation: Grupo de Caracterización Electrocinética en Membranas e Interfases, Dpto. Física Aplicada I, Facultad de Ciencias, Universidad de Málaga, 29071 Málaga, Spain.
authors.forename: M Isabel
authors.initials: MI
authors.lastname: Vázquez
authors.affiliation: Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos s/n, 29071 Málaga, Spain. Electronic address: malgarra67@gmail.com.
authors.forename: Manuel
authors.initials: M
authors.lastname: Algarra
authors.affiliation: Grupo de Caracterización Electrocinética en Membranas e Interfases, Dpto. Física Aplicada I, Facultad de Ciencias, Universidad de Málaga, 29071 Málaga, Spain. Electronic address: j_benavente@uma.es.
authors.forename: Juana
authors.initials: J
authors.lastname: Benavente
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry; D002482:Cellulose / Q000737:chemistry*; D050091:Dendrimers / Q000737:chemistry*; D004058:Diffusion; D008567:Membranes, Artificial; D010539:Permeability; D045663:Quantum Dots / Q000737:chemistry; D018036:Selenium Compounds / Q000737:chemistry; D012965:Sodium Chloride / Q000737:chemistry; D012996:Solutions; D013314:Stress, Mechanical; D013438:Sulfhydryl Compounds / Q000737:chemistry*; D013997:Time Factors
chemical_list: D019187:Cadmium Compounds; D050091:Dendrimers; D008567:Membranes, Artificial; D018036:Selenium Compounds; D012996:Solutions; D013438:Sulfhydryl Compounds; D012965:Sodium Chloride; D002482:Cellulose; C058667:cadmium selenide
keywords: Cellulosic membrane; Dendrimer; Mechanical properties; Permeability analysis and reduction