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Journal of Renewable Materials 2019年第3期7卷 289-300页

作者： Noureddine Baaka Manel Ben Ticha Wafa Haddar Mohamed Farouk Mhenni University of Monastir Faculty of Sciences of MonastirResearch Unity of Applied Chemistry and Environment5000 MonastirTunisia National Engineering School of Monastir 5019 MonastirTunisia higher institute of technological studies 5070Ksar HellalMonastirTunisia

Acrylic fibres are highly crystalline and non-polar polymers,which makes their dyeing a very difficult step that poses real technical *** order to overcome this concern,it is intended in this paper to modify acrylic fibers by different methods namely cationisation using the Crosscolor DRT then amidoximation using hydroxylamine hydrochloride and ammonium *** resulted samples were dyed then with the bio-colorant extracted from grape *** effect of the pretreatment on fibers fine structure using X-ray diffraction and the scanning electron microscope(SEM)images and its correlation with the colour strength of the dyed fabrics was *** dyeing parameters,such as dye bath pH and temperature on the performances of this dyeing process were *** dyeing qualities and new shades varying from brown to grey and dark green have been obtained following process optimization,mordanting and modification of acrylic fibers by the technique of cationisation.

关键词： Modified acrylic fibers grape marc bio-colorant mordant.

Application of Prunus amygdalus By-products in Eco-friendly Dyeing of Textile Fabrics

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Journal of Renewable Materials 2018年第1期6卷 55-67页

作者： Ibtissem Moussa Noureddine Baaka Ramzi Khiari Ali Moussa Gérard Mortha Mohamed Farouk Mhenni University of Monastir Faculty of SciencesUR13ES63-Research Unity of Applied Chemistry&Environment5000 MonastirTunisia higher institute of technological studies of ksar hellal Department of TextilesRue Hadj Ali Soua-B.P.n°68-5070 Ksar HellalTunisia institute of Engineering University of Grenoble AlpesCNRSGrenoble INPLGP2F-38000 GrenobleFrance National Engineering School of Monastir 5019 MonastirTunisia

Natural dyes have become an interesting subject of study because of their better ecological properties in comparison to their synthetic *** article concerns the dyeing of wool,silk,and polyamide fabrics with natural dyes extracted from almond shells and *** developed method of dyeing by these extracts is interesting and very attractive for several reasons:firstly,the extracts used are the black liquor discharged from the industries of delignification,which is a chemical process for removing lignin from agricultural wastes to produce a cellulosic fiber;(ii)these natural dyes are renewable and available in large quantities;(iii)this method is economical;and(iv)lastly,the dyeing performances of the obtained dyed textiles are very *** color of each dyed material was investigated in terms of the CIELAB coordinates and their fastness properties measured by washing,rubbing,and light.

关键词： Almond shell almond stem fastness properties natural dyes residual lignin

New Biobased Polyurethane Materials from Modified Vegetable Oil

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Journal of Renewable Materials 2021年第7期9卷 1213-1223页

作者： Chakib Mokhtari Fouad Malek Sami Halila Mohamed Naceur Belgacem Ramzi Khiari Laboratoire de Chimie Appliquée et Environnement–ECOMP—Facultédes Sciences UniversitéMohamed PremierOujda60000Maroc University of Grenoble Alpes CNRSCERMAVGrenobleCedex 9France University of Grenoble Alpes CNRSGrenoble INPGrenobleF-38000France University of Monastir Faculty of Sciences of MonastirResearch Unit of Applied Chemistry and EnvironmentMonastir5019Tunisia higher institute of technological studies(ISET)of ksar-hellal Ksar-Hellal5070Tunisia

Bio-based polyurethanes(PUs)have been occurred a large attention *** was found to be an alternative to the petrochemical based materials to the fact of their weak environmental influence,availability,good price and *** addition,the nature shows several bio-derived compounds as raw materials for the synthesis of polyols,including the vegetable oils,polyphenol,terpene,and other bio-renewable *** the aim to develop a new family of biobased polyurethanes(PUs)via vegetable oils,the elaboration of new Jojoba-based PUs was performed by catalyst-free polycondensation reaction of a synthesized Jojoba diol with various diisocyanates such us toluene diisocyanate(TDI)and isophorone diisocyanate(IPDI).All the compounds were characterized by FTIR and NMR spectroscopies,and their properties were determined by gel permeation chromatography,differential scanning calorimetry and thermogravimetric *** obtained results show renewable vegetable oils-based PUs materials can be preparing using a new environmentally ways and giving various good properties performances.

关键词： Biopolymers Jojoba oil polyurethane polyol thiol-ene

Effects Optimization of Bio-Polishing Industrial Process Parameters

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Journal of Textile Science and Technology 2023年第1期9卷 30-51页

作者： Imed Ben Marzoug Rim Cheriaa Textile Engineering Laboratory University of Monastir Monastir Tunisia higher technological studies institute Ksar-Hellal Tunisia

The purpose of this study is to select an appropriate commercial neutral cellulase enzyme for denim garments bio-polishing to achieve specific industrial goals. A full factorial experimental design was used to evaluate the effect of factors considered in the optimization of the bio-polishing process (fabric ID: x1, treatment time: x2, treatment temperature: x3, enzyme concentration: x4, storage time: x5, inactivation step: x6 and enzyme type: x7). Experiments were conducted using laboratory washing machine. Subjective evaluation was performed at a pilot and at an industrial scale. Tear, tensile strength and subjective evaluation concerning hand feel, fabric color, indigo dye pocket back staining and fuzziness extent were evaluated. Results showed that x6 and x7 had significant effects on the fabric tear and tensile strength loss. In the optimization, the great dependence between observed and predicted tear strength and tensile strength loss, the correlation coefficient of the models (R2 > 0.85) and the important value of F-ratio proved the validity of the models. Results showed that denim leg panels treated with the enzyme Lava-Cell NSZ presented a minimum loss of tear and tensile strength. A low-temperature and time enzymatic bio-polishing process was developed at industrial scale.

关键词： Bio-Polishing Cellulase Tensile Strength Optimization Fabric Hand Feel

Structural Characterization and Antioxidant Activity of Lignin Extracted from Ficus Carica L.

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Journal of Renewable Materials 2019年第4期7卷 345-354页

作者： Ibtissem Moussa Ramzi Khiari Ali Moussa Gérard Mortha Mohamed Farouk Mhenni University of Monastir Faculty of SciencesUR13 ES 63-Research Unity of Applied Chemistry&EnvironmentAvenue of the environment5019 MonastirTunisia University of Monastir National Engineering School of MonastirStreet of Ibn El Jazzar5000 MonastirTunisia higher institute of technological studies of ksar-hellal Department of Textile-TunisiaAvenue of Hadj Ali Soua.5070 Ksar-HellalTunisia University of Grenoble Alpes CNRSGrenoble INPLGP2F-38000 GrenobleFrance

The most abundant phenolic biopolymer in the biosphere is the *** phenolic biopolymer commonly exists in combination with polysaccharides and other cell wall *** this study,the solvent system dioxane-water is used to extract lignin,which is considered as unaltered native *** dioxane lignin extracted from fig stems was characterized regarding to its structural feature,quantification of its functional groups,molecular weight,and evaluation of its thermal *** and molecular weight distribution of the studied lignin indicated that isolated lignin contained a low amount of sugar(c.a.19%)and had a high weight-average molecular weight(10068 ***-1).Lignin sample had approximately the same amounts of guaiacyl(G)and p-hydroxyphenyl(H)units with relatively fewer syringyl(S)*** isolated lignin revealed good antioxidant ***,it proved to have a high potential of application in new antioxidants formulations.

关键词： Ficus Carica L. lignin organosolv molecular weight NMR spectroscopy antioxidant activity

Removal of Cu(II),Pb(II),Mg(II),and Fe(II) by Adsorption onto Alginate/Nanocellulose Beads as Bio-Sorbent

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Journal of Renewable Materials 2021年第4期9卷 601-613页

作者： Ragab E.Abou-Zeid Korany A.Ali Ramadan M.A.Gawad Kholod H.Kamal Samir Kamel Ramzi Khiari Cellulose and Paper Department National Research CentreGiza12622Egypt Applied Organic Chemistry Department Center of Excellence for Advanced ScienceNational Research CentreGiza12622Egypt Water Pollution Research Department National Research Centre Giza12622Egypt Faculty of Sciences of Monastir Research Unit of Applied Chemistry and EnvironmentUniversity of MonastirMonastir5019Tunisia higher institute of technological studies(ISET)of ksar-hellal Ksar-Hellal5070Tunisia University of Grenoble Alpes CNRSGrenoble INPLGP2GrenobleF-38000France

Alginate blended with cellulose nanocrystals(CNC),cellulose nanofibers(CNF),and tri-carboxylate cellulose nanofibers(TPC-CNF)prepared and encapsulated in the form of microcapsules(bio-polymeric beads).The cellulosic nanomaterials that used in this study were investigated as nanomaterials for wastewater treatment *** experiments were performed to study the removal of copper,lead,magnesium,and iron from aqueous solutions by the prepared *** effects of the sorbent dosage and the modified polymers on the removing efficiency of the metal cations were *** absorption was used to measure the metal ions *** modified bio-polymeric beads(Alg-CNF,Alg-CNC,and Alg-TPC-CNF)exhibited high-efficiency towards removing of the metal cations;Cu^(2+),Pb^(2+),Mg^(2+),and Fe^(2+).The Alg-TPC-CNF composite was exhibited excellent removing efficiency which around 95%for Pb,92%for Cu,43%for Fe and 54%for *** outcomes affirm that the utilization of nanomaterials giving higher adsorption capacities contrasted with similar material in its micro or macrostructure form.

关键词： Biopolymers nanocellulose alginate heavy metal removal wastewater treatment

Cellulose Fibre from Schinus molle and Its Characterization

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Journal of Renewable Materials 2022年第10期10卷 2593-2606页

作者： Abir Razzak Faten Mannai Ramzi Khiari Younes Moussaoui Mohamed N.Belgacem Laboratory for the Application of Materials to the Environment Waterand Energy(LR21ES15)Faculty of Sciences of GafsaUniversity of GafsaGafsa2112Tunisia Faculty of Sciences of Gafsa University of GafsaGafsa2112Tunisia Laboratory of Environmental Chemistry and Cleaner Process(LR21ES04) University of MonastirMonastir5019Tunisia higher institute of technological studies(ISET)of ksar-hellal Ksar-Hellal5070Tunisia University of Grenoble Alpes CNRSGrenoble INPLGP2GrenobleF-38000France Organic Chemistry Laboratory(LR17ES08) Faculty of Sciences of SfaxUniversity of SfaxSfax3029Tunisia

The exploitation of biomass represents a major environmental challenge related to the protection of the environment and the progressive exhaust of fossil *** this perspective,the main objective of this work is the extraction and the characterization of natural lignocellulosic fibers from the Schinus *** cellulose fibre extraction was investigated employing conditions of alkali *** the alkaline steps,a bleaching treatment was done and let to a yield about 45%pure *** identification of the chemical composition of Schinus molle reveals that this raw material contains a high level of biopolymers with a cellulose rate of 53.2%.Extracted cellulose fibers have been characterized by several techniques such as scanning electron microscopy,Fourier transform infrared,X-ray diffraction,Morfi,and by the determination of their degree of ***-IR results confirm the purity of the cellulosic fibers,and XRD analysis reveals that the crystallinity increases after the delignification and bleaching treatments.

关键词： Schinus molle cellulose alkaline treatment morphological studies

Cellulose Nanocrystal from Washingtonia Fibre and Its Characterization

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Journal of Renewable Materials 2022年第6期10卷 1459-1470页

作者： Mohammad Jawaid Lau Kia Kian Hassan Fouad Ramzi Khiari Othman Y.Alothman Mohamed Hashem Laboratory of Biocomposite Technology Institute of Tropical Forestry and Forest Products(INTROP)Universiti Putra MalaysiaSelangorMalaysia Applied Medical Science Department Community CollegeKing Saud UniversityRiyadhSaudi Arabia CNRS University of Grenoble AlpesGrenobleFrance Department of Textile Higher Institute of Technological Studies of Ksar HellalKsar HellalTunisia University of Monastir Laboratory of Environmental Chemistry and Cleaner Process(LCE2P-LR21ES04)MonastirTunisia Chemical Engineering Department College of EngineeringKing Saud UniversityRiyadhSaudi Arabia Dental Health Department College of Applied Medical SciencesKing Saud UniversityRiyadhSaudi Arabia

Cellulose nanocrystal(CNC)is a biomaterial derived from plant lignocellulosic components,widely applied in various industrial ***,with the growth of awareness in developing green nanomaterial,the explored Washingtonia fibre could be alternative biomass for obtaining CNC *** the present work,different acid concentrations of 5%,15%,and 25%hydrochloric solutions were employed to produce CNCs from Washingtonia *** the chemical treatments,the yield of the CNC product was successfully retained at 21.6%-25.1%.Individually separated and needle-shaped CNC particles could be observed under the microscopic viewing with the increased acid *** elemental analysis,a relatively pure cellulose compartment was produced for all CNC *** zeta potential values between-10 to-16 mV proved that each nanoparticle sample possessed dispersion ability within an aqueous ***,the degree of crystallinity and the thermal behavior of CNCs were enhanced with the increased acidic ***,the isolated CNCs(with 15%)from Washingtonia fibre lead a CNC with the highest aspect ratio(30).This parameter is so important that these structures show empowering points of view as nanomaterials for reinforced polymer composites,and it could be a reliable nano-filler for the composite fabrication process in the future.

关键词： Cellulose nanocrystal washingtonia fibre structure degree of crystallinity thermal behavior