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Boufi S, Abid M, Bouattour S, Ferraria A, Conceição D, Ferreira LV, Corbel G, Neto P, Lopes P, Vilar MR, do Rego AB. Cotton functionalized with nanostructured TiO2-Ag-AgBr layer for solar photocatalytic degradation of dyes and toxic organophosphates. Int J Biol Macromol 2019; 128:902-910. [DOI: 10.1016/j.ijbiomac.2019.01.218] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Revised: 12/27/2018] [Accepted: 01/31/2019] [Indexed: 11/24/2022]
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2
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Jbeli A, Hamden Z, Bouattour S, Ferraria A, Conceição D, Ferreira LV, Chehimi M, do Rego AB, Rei Vilar M, Boufi S. Chitosan-Ag-TiO2 films: An effective photocatalyst under visible light. Carbohydr Polym 2018; 199:31-40. [DOI: 10.1016/j.carbpol.2018.06.122] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 06/12/2018] [Accepted: 06/28/2018] [Indexed: 12/12/2022]
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3
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Abid M, Bouattour S, Ferraria A, Conceição D, Carapeto A, Vieira Ferreira L, Botelho do Rego A, Rei Vilar M, Boufi S. Functionalization of cotton fabrics with plasmonic photo-active nanostructured Au-TiO2 layer. Carbohydr Polym 2017; 176:336-344. [DOI: 10.1016/j.carbpol.2017.08.090] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 08/14/2017] [Accepted: 08/19/2017] [Indexed: 11/28/2022]
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4
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Zinoubi K, Majdoub H, Barhoumi H, Boufi S, Jaffrezic-Renault N. Determination of trace heavy metal ions by anodic stripping voltammetry using nanofibrillated cellulose modified electrode. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.05.039] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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5
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Ladhar A, Arous M, Boufi S, Kallel A. Molecular dynamics of poly(styrene-co-2-ethyl hexylacrylate) copolymer/cellulose nanocrystals nanocomposites investigated by dielectric relaxation spectroscopy: Effect of the silane content. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.10.031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Errokh A, Ferraria AM, Conceição DS, Vieira Ferreira LF, Botelho do Rego AM, Rei Vilar M, Boufi S. Controlled growth of Cu2O nanoparticles bound to cotton fibres. Carbohydr Polym 2016; 141:229-37. [PMID: 26877017 DOI: 10.1016/j.carbpol.2016.01.019] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Revised: 01/03/2016] [Accepted: 01/09/2016] [Indexed: 11/17/2022]
Abstract
A green, safe and fast procedure is presented for in situ generation of nanoparticles (NPs) of cuprous oxide (Cu2O) onto cotton fibres at room temperature using water as a solvent. The method is based on a mild surface oxidation of cellulose fibres to generate in a controlled way carboxylic groups acting as a binding site for the adsorption of Cu(2+) via electrostatic coordination. Then, the adsorbed Cu(2+) ions were readly converted into Cu2O by dipping the treated cotton fibres into a aqueous solution of a reducing agent. Field-emission scanning electron microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD), as well as UV-vis absorption and emission spectroscopic methods were used to analyse the size, morphology, chemical composition and the crystalline structure of the generated nanoparticles on the fabrics. The morphology of the ensuing Cu2O nanoparticles was shown to be dependent on the reduycing agent used. Antibacterial properties of the modified fibres were also investigated.
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Affiliation(s)
- A Errokh
- University of Sfax, Faculty of Science, LMES, BP1171-3018 Sfax, Tunisia
| | - A M Ferraria
- Centro de Química-Física Molecular and Institute of Nanoscience and Nanotechnology, IST, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | - D S Conceição
- Centro de Química-Física Molecular and Institute of Nanoscience and Nanotechnology, IST, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | - L F Vieira Ferreira
- Centro de Química-Física Molecular and Institute of Nanoscience and Nanotechnology, IST, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | - A M Botelho do Rego
- Centro de Química-Física Molecular and Institute of Nanoscience and Nanotechnology, IST, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | - M Rei Vilar
- ITODYS, UMR7086 CNRS, Université Paris Diderot, Sorbonne Paris Cité, Rue Jean Antoine de Baïf, 75205 Paris Cedex 13, France
| | - S Boufi
- University of Sfax, Faculty of Science, LMES, BP1171-3018 Sfax, Tunisia.
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Mabrouk AB, Salon MB, Magnin A, Belgacem M, Boufi S. Cellulose-based nanocomposites prepared via mini-emulsion polymerization: Understanding the chemistry of the nanocellulose/matrix interface. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.01.077] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Bouhamed H, Boufi S, Magnin A. Alumina interaction with AMPS–MPEG copolymers produced by RAFT polymerization: Stability and rheological behavior. J Colloid Interface Sci 2009; 333:209-20. [DOI: 10.1016/j.jcis.2009.01.030] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2008] [Revised: 01/11/2009] [Accepted: 01/13/2009] [Indexed: 10/21/2022]
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Belhassen R, Boufi S, Vilaseca F, López JP, Méndez JA, Franco E, Pèlach MA, Mutjé P. Biocomposites based onAlfafibers and starch-based biopolymer. POLYM ADVAN TECHNOL 2008. [DOI: 10.1002/pat.1364] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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10
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Arous M, Amor IB, Boufi S, Kallel A. Experimental study on dielectric relaxation in alfa fiber reinforced epoxy composites. J Appl Polym Sci 2007. [DOI: 10.1002/app.26885] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Bouhamed H, Boufi S, Magnin A. Dispersion of alumina suspension using comb-like and diblock copolymers produced by RAFT polymerization of AMPS and MPEG. J Colloid Interface Sci 2007; 312:279-91. [PMID: 17467726 DOI: 10.1016/j.jcis.2007.03.060] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2007] [Revised: 03/15/2007] [Accepted: 03/26/2007] [Indexed: 11/16/2022]
Abstract
Different copolymers of 2-acrylamido-2-methylpropanesulfonic acid sodium salt (AMPS) methoxypolyethyleneglycol methacrylate (MPEG) with statistical and diblock distributions were prepared using RAFT-controlled radical polymerization. The effect of polymer architecture and monomer ratio on the adsorption behavior, electrokinetic, and stability properties of the alumina suspensions was investigated. Adsorption isotherms showed that copolymer interaction depended on both the ratio of the monomers and their distribution within the macromolecular backbone. Changes in the electrokinetic properties of the alumina suspension after addition of the copolymers were investigated by monitoring the particle zeta-potential as a function of pH. A continuous shift in the isoelectric point IEP to a more acidic value was observed and particle charges were reversed when the amount of copolymer added exceeded a critical level.
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Affiliation(s)
- H Bouhamed
- Laboratoire Sciences des Matériaux et Environnement, Faculté des Sciences de Sfax, BP 802-3018 Sfax, Tunisia
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Alila S, Aloulou F, Beneventi D, Boufi S. Self-aggregation of cationic surfactants onto oxidized cellulose fibers and coadsorption of organic compounds. Langmuir 2007; 23:3723-31. [PMID: 17335256 DOI: 10.1021/la063118n] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
In this work, the adsorption of cationic surfactant and organic solutes on oxidized cellulose fibers bearing different amounts of carboxylic moieties was investigated. The increase in the amount of -COOH groups on cellulose fibers by TEMPO oxidation induced a general rise in surfactant adsorption. For all tested conditions, that is, cellulose oxidation level and surfactant alkyl chain length (C12 and C16), adsorption isotherms displayed a typical three-region shape with inversion of the substrate zeta-potential which was interpreted as reflecting surfactant adsorption and aggregation (admicelles and hemimicelles) on cellulose fibers. The addition of organic solutes in surfactant/cellulose systems induced a decrease in surfactant cac on the cellulose surface thus favoring surfactant aggregation and the formation of mixed surfactant/solute assemblies. Adsorption isotherms of organic solutes on cellulose in surfactant/cellulose/solute systems showed that solute adsorption is strictly correlated to (i) the surfactant concentration, solute adsorption increases up to the surfactant cmc, where solute partitioning between the cellulose surface and free micelles causes a drop in adsorption, and to (ii) solute solubility and functional groups. The specific shape of solutes adsorption isotherms at a fixed surfactant concentration was interpreted using a Frumkin adsorption isotherm, thus suggesting that solute uptake on cellulose fibers is a coadsorption and not a partitioning process. Results presented in this study were compared with those obtained in a previous work investigating solute adsorption in anionic surfactant/cationized cellulose systems to better understand the role of surfactant/solute interactions in the coadsorption process.
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Affiliation(s)
- S Alila
- LMSE, Faculté des Sciences de Sfax, BP 802-3018 Sfax-Tunisie, and LGP2-UMR5518, Ecole Française de Papeterie et des Industries Graphiques (INPG), BP 65, F-38402 St. Martin d'Héres, France
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Bouhamed H, Magnin A, Boufi S. Alumina interaction with AMPS–MPEG random copolymers III. Effect of PEG segment length on adsorption, electrokinetic and rheological behavior. J Colloid Interface Sci 2006; 298:238-47. [PMID: 16427069 DOI: 10.1016/j.jcis.2005.12.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2005] [Revised: 12/01/2005] [Accepted: 12/01/2005] [Indexed: 10/25/2022]
Abstract
The effect of different 2-acrylamido-2-methylpropanesulfonic acid sodium salt (AMPS)-methoxypolyethyleneglycol methacrylate (MPEG) comb-like copolymers on the adsorption behavior, electrokinetic and rheological properties of alumina suspensions has been investigated. The change in adsorption isotherms with the content of the two monomers, the medium pH and the ionic strength indicated that the interaction of these copolymers was found to be controlled by both the fraction of ionic groups on the polymer and by the length of the polyethyleneglycol (PEG) segments. Adsorption of the copolymers on alumina particles is accompanied by a shift in the IEP toward acid pH values and may lead to a charge reversal above a certain level. The presence of the PEG segment equally affects the magnitude of the zeta potential by moving the shear plane forward. Addition of the copolymers greatly affects the rheological behavior of the suspension; the viscosity at a defined shear rate decreases and reaches an optimum, which is all the lower as the fraction of the ionic groups is higher. The dispersing effect of the copolymer was controlled by both the ionization level of the copolymer and by the length of the PEG segments.
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Affiliation(s)
- H Bouhamed
- Laboratoire Sciences des Matériaux et Environnement (LMSE), Faculté des Sciences de Sfax, BP 802-3018 Sfax, Tunisia
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Aloulou F, Boufi S, Beneventi D. Adsorption of organic compounds onto polyelectrolyte immobilized-surfactant aggregates on cellulosic fibers. J Colloid Interface Sci 2004; 280:350-8. [PMID: 15533407 DOI: 10.1016/j.jcis.2004.08.008] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2004] [Accepted: 08/03/2004] [Indexed: 10/26/2022]
Abstract
The adsorption of anionic surfactants with different hydrophobic chain lengths onto cellulose fibers pretreated with a cationic polyelectrolyte has been investigated. Five steps are involved in the adsorption process, which was ascribed to the formation of monolayer and bilayer surfactant aggregates. Electrostatic interaction between the residual surface charges followed by hydrophobic interaction among the alkyl chains are considered the main factors in the adsorption process. The adsorption of the anionic surfactant was found to greatly enhance the retention of organic compounds onto the polyelectrolyte-treated cellulose. The coadsorption phenomenon, which was dependent on the saturation level of the adsorbed surfactant, has been explained in terms of the accumulation of the organic solute on the hydrophobic core generated by the adsorbed layer.
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Affiliation(s)
- F Aloulou
- LMSE, Faculté des Sciences de Sfax, B.P. 802-3018 Sfax, Tunisia
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Abstract
Coagulation-flocculation of the colloids particles present in the cuttlefish effluents was investigated using a coagulation step with aluminium sulphate (SA), followed by a flocculation step with starch, SiO2 or MgO and then poly dimethyl ammonium chloride (PDMAC), in order to reduce the turbidity and chemical oxygen demand (COD). Kinetic aspects, adsorption equilibrium, pH and conductivity were studied in order to determine the optimum coagulation conditions and SA quantities. The addition of organic polymer as a flocculant agent gave a better performance than the use of salt alone with a reduction of 50% of the SA consumption. Polymer molecular weight of PDMAC and charge density of starch have been also investigated. The best result, which is 90% of removal rate in chemical oxygen demand (COD) and a turbidity value of 7 NTU was obtained with the combination using 165.5 mg l(-1) of aluminium sulphate, 750 mg l(-1) of MgO and 35 mg l(-1) of PDMAC 400000.
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Affiliation(s)
- E Ellouze
- Laboratoire des Sciences de Matériaux et Environnement, Faculté des Sciences de Sfax BP 759 Route de Soukra Km 4, 3000 Sfax, Tunisia
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Abstract
Adsorption of brush copolymers, bearing sulfonate groups and polyethylene glycol segments, on to alumina particles in suspension in water has been investigated. Study of the adsorption isotherms revealed that the copolymers displayed a strong affinity for the surface of the alumina regardless of the fraction of ionic groups on the polymer. For poly(ethylene glycol) content greater than 50%, the adsorption isotherms revealed an initial adsorption plateau followed by a second one. The shape of the adsorption isotherms was interpreted in terms of the polymer configuration at the solid-to-liquid interface. The effects of the pH and the ionic force on adsorption were studied and connected to the effects of interaction between chain segments at the surface of the alumina particles. Changes in the electrokinetic properties of the alumina particles after addition of the copolymers were investigated by following the zeta potential of particles as a function of pH. In the presence of the copolymer continuous shift of the isoelectric point IEP to a more acidic values was observed. Beyond a certain concentration the zeta potential remained negative regardless of the pH.
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Affiliation(s)
- H Bouhamed
- Laboratoire Sciences des Matériaux et Environnement, Faculté des Sciences de Sfax, BP 802-3018 Sfax, Tunisia
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Laita H, Boufi S, Gandini A. The application of the Diels-Alder reaction to polymers bearing furan moieties. 1. Reactions with maleimides. Eur Polym J 1997. [DOI: 10.1016/s0014-3057(97)00009-8] [Citation(s) in RCA: 100] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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