Documents disponibles écrits par cet auteur

Adsorption of aniline on cross-linked starch sulfate from aqueous solution / Lei Guo in Industrial & engineering chemistry research, Vol. 48 N° 23 (Décembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10657–10663 Titre : Adsorption of aniline on cross-linked starch sulfate from aqueous solution Type de document : texte imprimé Auteurs : Lei Guo, Auteur ; Guiying Li, Auteur ; Junshen Liu, Auteur Année de publication : 2010 Article en page(s) : pp. 10657–10663 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Adsorption--Aniline--Cross-Linked--Starch--Sulfate--Aqueous--Solution Résumé : A new environment friendly adsorbent, cross-linked starch sulfate (CSS), was prepared and used to adsorb aniline from aqueous solution. Different adsorption parameters like initial pH, adsorption time, equilibrium aniline concentration, and temperature were thoroughly studied, and the kinetic, equilibrium, and thermodynamics of the adsorption process were further investigated. It showed that CSS can effectively remove aniline from the solution. The adsorption capacity is highly dependent on the amount of sulfate groups on adsorbents and the initial pH. The pseudo-first-order and pseudo-second-order kinetic models were applied to test the experimental data, and the pseudo-second-order kinetic model provided a better correlation of the experimental data in comparison with the pseudo-first-order model. The maximum removal efficiency of aniline is 75.29% using 1 g L−1 of CSS3 dose. Langmuir, Freundlich, Dubinin−Radushkevich, and Sips models have been applied to study the adsorption equilibrium, and the equilibrium adsorption data were well described by the Sips isotherms. The Scatchard plot analysis was used to evaluate the binding sites of CSS. The adsorption of aniline on CSS is exothermic in nature. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9010782 [article] Adsorption of aniline on cross-linked starch sulfate from aqueous solution [texte imprimé] / Lei Guo, Auteur ; Guiying Li, Auteur ; Junshen Liu, Auteur . - 2010 . - pp. 10657–10663. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10657–10663 Mots-clés : Adsorption--Aniline--Cross-Linked--Starch--Sulfate--Aqueous--Solution Résumé : A new environment friendly adsorbent, cross-linked starch sulfate (CSS), was prepared and used to adsorb aniline from aqueous solution. Different adsorption parameters like initial pH, adsorption time, equilibrium aniline concentration, and temperature were thoroughly studied, and the kinetic, equilibrium, and thermodynamics of the adsorption process were further investigated. It showed that CSS can effectively remove aniline from the solution. The adsorption capacity is highly dependent on the amount of sulfate groups on adsorbents and the initial pH. The pseudo-first-order and pseudo-second-order kinetic models were applied to test the experimental data, and the pseudo-second-order kinetic model provided a better correlation of the experimental data in comparison with the pseudo-first-order model. The maximum removal efficiency of aniline is 75.29% using 1 g L−1 of CSS3 dose. Langmuir, Freundlich, Dubinin−Radushkevich, and Sips models have been applied to study the adsorption equilibrium, and the equilibrium adsorption data were well described by the Sips isotherms. The Scatchard plot analysis was used to evaluate the binding sites of CSS. The adsorption of aniline on CSS is exothermic in nature. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9010782

Self - assembled nanoparticles from thermo - sensitive polyion complex micelles for controlled drug release / Guiying Li in Chemical engineering journal, Vol. 174 N° 1 (Octobre 2011) 

Public ISBD [article]  in Chemical engineering journal > Vol. 174 N° 1 (Octobre 2011) . - pp. 199–205 Titre : Self - assembled nanoparticles from thermo - sensitive polyion complex micelles for controlled drug release Type de document : texte imprimé Auteurs : Guiying Li, Auteur ; Lei Guo, Auteur ; Yanfeng Meng, Auteur Année de publication : 2012 Article en page(s) : pp. 199–205 Note générale : Génie chimique Langues : Anglais (eng) Mots-clés : Controlled  release  Polyion  complex  micelles  Nanoparticles  CS  -g  -  PNIPAM  P(tBA  -  co  -  AA)-  b  -  PNIPAM Résumé : Self-assembled nanoparticles from thermo-sensitive polyion complex (PIC) micelles comprised of poly(t-butyl acrylate-co-acrylic acid)-b-poly(N-isopropylacrylamide) [P(tBA-co-AA)-b-PNIPAM] core–shell micelles and graft copolymer chitosan-g-poly(N-isopropylacrylamide) (CS-g-PNIPAM) were developed for applications in controlled drug release. The PIC micelles nanoparticles had a multi-layer core–shell–corona structure with hydrophobic PtBA as the inner core, negatively charged PAA and positively charged CS forming the middle layer as the shell, and thermo-sensitive PNIPAM as the outer corona. The molar ratio of P(tBA-co-AA)-b-PNIPAM to CS-g-PNIPAM affected the functionalities and hydrodynamic diameters of nanoparticles. Release of doxorubicin (DOX) from micelles was suppressed at neutral solutions due to the stability of electrostatic interactions but accelerated at acidic solutions or high temperatures above LCST. This study presents new micelles with a functional inner shell whose structure can be rapidly damaged to release charged drugs when the microenvironment of micelles changed. ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science/article/pii/S1385894711010540 [article] Self - assembled nanoparticles from thermo - sensitive polyion complex micelles for controlled drug release [texte imprimé] / Guiying Li, Auteur ; Lei Guo, Auteur ; Yanfeng Meng, Auteur . - 2012 . - pp. 199–205. Génie chimique Langues : Anglais (eng) in Chemical engineering journal > Vol. 174 N° 1 (Octobre 2011) . - pp. 199–205 Mots-clés : Controlled  release  Polyion  complex  micelles  Nanoparticles  CS  -g  -  PNIPAM  P(tBA  -  co  -  AA)-  b  -  PNIPAM Résumé : Self-assembled nanoparticles from thermo-sensitive polyion complex (PIC) micelles comprised of poly(t-butyl acrylate-co-acrylic acid)-b-poly(N-isopropylacrylamide) [P(tBA-co-AA)-b-PNIPAM] core–shell micelles and graft copolymer chitosan-g-poly(N-isopropylacrylamide) (CS-g-PNIPAM) were developed for applications in controlled drug release. The PIC micelles nanoparticles had a multi-layer core–shell–corona structure with hydrophobic PtBA as the inner core, negatively charged PAA and positively charged CS forming the middle layer as the shell, and thermo-sensitive PNIPAM as the outer corona. The molar ratio of P(tBA-co-AA)-b-PNIPAM to CS-g-PNIPAM affected the functionalities and hydrodynamic diameters of nanoparticles. Release of doxorubicin (DOX) from micelles was suppressed at neutral solutions due to the stability of electrostatic interactions but accelerated at acidic solutions or high temperatures above LCST. This study presents new micelles with a functional inner shell whose structure can be rapidly damaged to release charged drugs when the microenvironment of micelles changed. ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science/article/pii/S1385894711010540