Synthesis of eco-friendly polymeric resins and their rote in making leather with improved retanning properties and wastewater pollution / Muhammad Naveed Ashraf in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 6 (11-12/2020)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 104, N° 6 (11-12/2020) . - p. 288-299 Titre : Synthesis of eco-friendly polymeric resins and their rote in making leather with improved retanning properties and wastewater pollution Type de document : texte imprimé Auteurs : Muhammad Naveed Ashraf, Auteur ; Shahzad Maqsood Khan, Auteur ; Shahid Munir, Auteur Année de publication : 2020 Article en page(s) : p. 288-299 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biopolymères Biopolymères -- Synthèse Cuir -- Teneur en formaldéhyde Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux -- Propriétés organoleptiques Eaux usées -- Analyse Fourier, Spectroscopie infrarouge à transformée de Glutaraldéhyde Mélamine La mélamine, de nom chimique 1,3,5-triazine-2,4,6-triamine, est parfois dénommée cyanuramide ou cyanurotriamine. Sa formule brute est C3H6N6. Les "résines mélamine-formaldéhyde" ou "mélamine-formol" (sigle MF) sont appelées "mélamine" dans le langage courant. Elles font partie de la famille des aminoplastes qui regroupe des résines thermodurcissables aminées, issues d'un comonomère tel l'urée ou la mélamine, parfois le thiocarbamide, le cyanamide hydrogène ou le dicyandiamide ; le second comonomère étant le formaldéhyde. Morphologie (matériaux) Poids moléculaires Polymères -- Synthèse Retannage Rhéologie Sulfanilique, Acide Thermogravimétrie Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In this work a novel and eco-friendly retanning agent was developed to eliminate the potential risk of formaldehyde occurrence in leather along with improving the characteristics of leather. A series of sulfanilic acid modified melamine-glutaraldehyde resins were produced at varied mole ratios of melamine, glutaraldehyde and sulfanilic acid. The glutaraldehyde to melamine mole ratio (GL/M) was varied from 2 to 6 whereas the sulfanilic acid to melamine mole ratio (SNA/M) was varied from 0.5 to 3. The viscosity trend of resins in the series was studied. Synthesised resins were used in retanning leather in comparison with a melamine-formaldehyde resin as a control. Retanned pieces of leather were evaluated for their mechanical properties and organoleptic properties. Samples of leather retanned with the optimal resin were also analysed for comparative free formaldehyde determination. Scanning electron microscopy was performed to study the morphology of grain surface and fibre structure of resulting leather. Effluent received from retanning process was analysed for pollution load estimation. The optimum resin was subjected to determination of its molecular weight, to thermo gravimetric analysis and FTIR. It was obvious from the results of this study that the optimal resin produced a leather with improved mechanical and organoleptic properties in comparison with the control. Estimation of formaldehyde content in leather proved the complete elimination of free formaldehyde in leather whereas the level in control leather was 152mg/kg. Results from the pollution load study of waste water confirmed an improvement in efficiency of COD, TDS, TSS and formaldehyde by 13.40%, 9.71%, 8.82% and 100% respectively. SEM monographs of grain surface and collagen fibres showed better filling, distribution and reactivity of the optimal resin. Thermo gravimetric analysis proved the increase in thermal stability of developed resin by 16.3% as compared to control. The eco-friendly condensation polymer produced in this work was considered suitable for making formaldehyde-free leather with improved retanning properties, thermal stability and pollution load. Note de contenu : - EXPERIMENTAL PROCEDURE : Chemicals and apparatus - Preparation of sulfanilic acid modified melamine-glutaraldehyde resins (MGLSNA) - RESULTS AND DISCUSSION : Schematic route of synthesis - Viscosity trend in MGLSNA series - Leather application of MGLSNA resins - Mechanical properties of retanned leather - Organoleptic properties of leather - Comparative SEM analysis of leather - Quantitative estimation of fre formaldehyde content in leather - Molecular weight determination of optimal MGLSNA resin - Thermo gravimetric analysis - Structural elucidation through FTIR - Effluent analysis - Table 1 : Mole ratios and physical characteristics of prepared MGSLNA resins - Experimental data - Table 2 : Leather processing materials, conditions and recipe - Table 3 : Mechanical characteristics of leather retanned with resins MGLSNA - Table 4 : Dependence of flow time, relative viscosity, specific viscosity, Δ, ηsp - inηr and Δ/c2 different concentrations of MGLSNA resin #08 - Table 5 : Comparative pollution load reduction efficiency of optimum MGLSNA resin - Scheme 1 : Formation of hydroxy derivatives of melamine - Scheme 2 : Preparation of sodium salt of sulfanilic acid - Scheme 3 : Sulfonation of hydroxy derivatives of melamine - Scheme 4 : Condensation of monomers to produce resin MGLSNA - Fig. 1 : Comparative study of organoloeptic properties of MGLSNA resins - Fig. 2 : Scanning electron micrographs of cross section of grain surface (X50) and collagen fibre (X500) - Fig. 3 : Dependence of Δ/c2 on the concentration of optimal resin MGLSNA#08 - Fig. 4 : TGA of optimal resin MGLSNA#08 and commercial melamine resin - Fig. 5 : FTIR of MGLSNA#08 resins En ligne : https://drive.google.com/file/d/1ebHKU_sNQN0nAZXxMvUEazp3CWa7RHtj/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34910 [article]

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Synthesis of a low-temperature self-crosslinking polyacrylate binder with a core-shell structure and its application in textile pigment printing / Xiaoyu Zhang in COLORATION TECHNOLOGY, Vol. 134, N° 4 (08/2018)  

[article]  inCOLORATION TECHNOLOGY > Vol. 134, N° 4 (08/2018) . - p. 299-307 Titre : Synthesis of a low-temperature self-crosslinking polyacrylate binder with a core-shell structure and its application in textile pigment printing Type de document : texte imprimé Auteurs : Xiaoyu Zhang, Auteur ; Yi Zhong, Auteur ; Xiaofen Sui ; Hong Xu ; Lingpin Zhang ; Zhiping Mao Année de publication : 2018 Article en page(s) : p. 299-307 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermique Auto-réticulation Basses températures Calorimétrie Composés organiques -- Synthèse Core-Shell Couches minces -- Propriétés mécaniques Essais dynamiques Fourier, Spectroscopie infrarouge à transformée de Impression sur étoffes Latex Liants Méthacrylate d'acétoacétoxyéthyle Microscopie électronique en transmission Polyacrylates Polymérisation en émulsion Thermogravimétrie Index. décimale : 667.3 Teinture et impression des tissus Résumé : A core‐shell acrylate binder for pigment printing containing acetoacetoxyethyl methacrylate (AAEM) in its shell was synthesised via semicontinuous seeded emulsion polymerisation. Self‐crosslinking occurs when curing at low temperatures without releasing formaldehyde. The core‐shell structure of the binder produces prints with a high block resistance and good film‐forming properties, which can avoid clogging the screens during the printing process and help to acquire a soft handle for textiles. Transmission electron microscopy (TEM) analysis demonstrated that the latex particle had a core‐shell structure of size ca. 120 nm. Differential scanning calorimetry (DSC) testing showed that polyacrylate (PA)‐modified AAEM exhibited two apparent Tg, providing further information about the formation of the soft core‐hard shell latex particles. Crosslinking degree tests, thermogravimetric analysis (TGA) and testing of the mechanical properties indicated that self‐crosslinking of AAEM took place at 100 °C, thereby enhancing the thermostability and mechanical properties of the latex films. The softer and non‐stick handle, excellent rubbing fastness, and higher K/S were obtained by further padding the printed fabric with amino silicon softener. The chemical structures of the surfaces of the printed fabrics were studied by Fourier Transform‐infrared (FTIR), and results confirmed that the crosslinking reaction between the amino of the softener and remaining acetoacetoxy functional group (AcAc) of AAEM had taken place. Note de contenu : - EXPERIMENTAL : Chemicals - Materials - Equipment - Synthesis of core-shell latex - Preparation of latex films - Preparation of latex film - Pigment printing - Measurement and analysis - RESULTS AND DISCUSSION : Polymerisation - Morphology - Thermal analysis - Mechanical properties - Pigment printing - After treatment DOI : 10.1111/cote.12339 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12339 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30925 [article]

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Synthesis of PET-based urethane-modified alkyd resins from depolymerization intermediates of post-consumer PET bottles: coating properties and thermal behaviors / Cavusoglu Ferda Civan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 2 (03/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 741-761 Titre : Synthesis of PET-based urethane-modified alkyd resins from depolymerization intermediates of post-consumer PET bottles: coating properties and thermal behaviors Type de document : texte imprimé Auteurs : Cavusoglu Ferda Civan, Auteur ; Isil Acar, Auteur Année de publication : 2023 Article en page(s) : p. 741-761 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alkyde modifié uréthane Bouteilles en matières plastiques -- Recyclage Dépolymérisation Fourier, Spectroscopie infrarouge à transformée de Matières plastiques -- Déchets Polyéthylène téréphtalate Polymères -- Synthèse Résistance chimique Revêtement de surface Revêtements (produits chimiques) Revêtements -- Propriétés physiques Revêtements -- Propriétés thermiques Revêtements organiques Thermogravimétrie Index. décimale : 667.9 Revêtements et enduits Résumé : Urethane-modified alkyd resins were synthesized using the depolymerization intermediates obtained from simultaneous hydrolysis–glycolysis reactions of post-consumer poly(ethylene terephthalate) (PET) bottles with dipropylene glycol (DPG) and water. For this aim, first, the synthesis of a four-component reference alkyd resin having an oil content of 50% was synthesized by using tall oil fatty acid (TOFA), trimethylolpropane (TMP), phthalic anhydride (PA), and dipropylene glycol (DPG). The PET-based alkyd resins were also synthesized using different amounts and types of purified and fractionated depolymerization intermediates (water-insoluble fraction, WIF, and water-soluble and crystallizable fraction, WSCF) under the same reaction conditions. For the synthesis of PET-based alkyd resins, the depolymerization intermediates were used partially or completely instead of dibasic acid and/or diol components in alkyd resin formulations. In order to determine the optimum modification ratio for urethane-modified alkyd resin synthesis, the reference alkyd resin was reacted with toluene diisocyanate (TDI) at different molar ratios (NCO/OH: 1/1, 1/2, and 1/3), and the optimum NCO/OH ratio was determined as 1/1, according to the surface coating properties. And, then, all PET-based urethane-modified alkyd resins were prepared by the modification reactions of the PET-based alkyd resins with TDI at an optimum ratio. At the end of the study, it was observed that the use of waste PET intermediates (WIF or WSCF) did not cause any negative effects on physical/chemical surface coating and thermal properties ; on the contrary, some properties were obtained as superior than that of the reference resin. In conclusion, it seems possible to use PET-based urethane-modified alkyd resin could be used as a cheap, environmentally friendly, and relatively economic binder component in synthetic paint formulations. In the synthesis of urethane-modified alkyd resin, using a certain amount of waste PET intermediate instead of dibasic acid and/or diol component will reduce raw material costs and also benefit the environment by re-evaluation of recycled PET. Thus, it could be both possible to recycle of post-consumer PET bottles, which are a valuable waste, and to provide cheap raw materials without compromising its features for paint formulations. These results are remarkable in terms of sustainability and waste management besides are also important for the economy and paint industry. Note de contenu : - MATERIALS AND METHODS : Materials - Instruments - Methods - FTIR analyses - Surface coating properties - Thermal analyses - RESULTS AND DISCUSSION : FTIR analysis results - Surface coating tests results - TGA analysis results - Table 1 : Depolymerization reactions conditions and properties of the depolymerization intermediates - Table 2 : Symbols and compositions of the four-component alkyd resins used in the synthesis of the urethane-modified alkyd (UA) resins - Table 3 : Symbols, components, and modification ratios of the urethane-modified alkyd (UA) resins - Table 4 : Drying stages and physical surface coating properties of the reference urethane-modified alkyd (UA) resins - Table 5 : Chemical surface coating properties of the reference urethane-modified alkyd (UA) resins - Table 6 : Drying time test results of the urethane-modified alkyd (UA) resins - Table 7 : Physical surface coating properties of the urethane-modified alkyd (UA) resins - Table 8 : Alkali resistance test results of the urethane-modified alkyd (UA) resins - Table 9 : Acid resistance, salt-water resistance, and environmental resistance test results of the urethane-modified alkyd (UA) resins - Table 10 : Water resistance test results of the urethane-modified alkyd (UA) resins - Table 11: Solvent resistance test results of the urethane-modified alkyd (UA) resins - Table 12 : The temperatures required for reaching certain weight losses (%) DOI : https://doi.org/10.1007/s11998-022-00705-y En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00705-y.pdf?pdf=button% [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39316 [article]

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Synthesis of polyesteramides : poly(ethylene adipate amide) and poly(ethylene succinate amide) and their application as corrosion inhibitors in paint formulations / Mohamed Heba A. in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 5 (09/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 5 (09/2018) . - p. 967-981 Titre : Synthesis of polyesteramides : poly(ethylene adipate amide) and poly(ethylene succinate amide) and their application as corrosion inhibitors in paint formulations Type de document : texte imprimé Auteurs : Mohamed Heba A., Auteur ; Yasser Assem, Auteur ; Rana Said ; Ahmed M. El-Masry Année de publication : 2018 Article en page(s) : p. 967-981 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse spectrale Analyse thermique Anticorrosifs Anticorrosion Essais accélérés (technologie) Formulation (Génie chimique) Polycondensation Polyesteramides Polymères -- Synthèse Polymères aliphatiques Revêtements protecteurs Thermogravimétrie Index. décimale : 667.9 Revêtements et enduits Résumé : Aliphatic polyesters based on adipic or succinic acid were synthesized by polycondensation reaction to produce poly(ethylene adipate) (PEA) and poly(ethylene succinate) (PES), respectively. The prepared polyesters (PEA and PES) were modified with monoethanol amine to produce polyesteramides, namely polyethylene adipate amide (PEAA) and polyethylene succinate amide (PESA). Full characterization of PEA, PES, PEAA and PESA was achieved using thermal, spectroscopic, and gel permeation chromatography analyses. The prepared aliphatic polyesters (PEA and PES) and polyesteramides (PEAA and PESA) were evaluated as corrosion inhibitors in paint formulations. Two groups of paints were prepared with 24 paint formulations based on medium oil alkyd resin, talc, titanium dioxide, drier and the prepared polymers with different types and concentrations. All the formulations are free from any inorganic anticorrosive pigments. PEA and PEAA were incorporated in Group I formulations. Paint formulations that contain PEA are six formulations F1A, F2A, F3A, F4A, F5A and F6A in addition to F1Aa, F2Aa, F3Aa, F4Aa, F5Aa and F6Aa based on PEAA with different concentrations 0.5%, 1.5%, 2.5%, 3.5%,4.5% and 5.5%, respectively. Group II formulations contain twelve other prepared formulations F1S, F2S, F3S, F4S, F5S and F6S based on PES, in addition to F1Sa, F2Sa, F3Sa, F4Sa, F5Sa and F6Sa based on PESA with the same series of concentrations. Physical, mechanical, and chemical properties of the coated films were determined. Corrosion tests in addition to surface analysis by a scanning electron microscope were performed to study the protection efficiency of such coats on steel. It was found that the synthesized polyesteramides can protect steel from corrosion successfully in 3.5% NaCl solution depending on their adsorption on the steel surface. The extent of steel protection coated with PESA formulations was slightly higher than PEAA. Note de contenu : - EXPERIMENTAL : Materials - General procedure for the synthesis of polyesters from dicarboxylic acids and diols - Synthesis of polyesteramides PEAA and PESA - Coating formulations - Characterization techniques - RESULTS AND DISCUSSION : Synthesis of PEA, PEAA, PES and PESA - Characterization of PEA, PEAA, PES and PESA DOI : 10.1007/s11998-017-0027-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-0027-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31121 [article]

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Synthesis of yellow pyridonylazo colorants and their application in dye-pigment hybrid colour filters for liquid crystal display / Jong Min Park in COLORATION TECHNOLOGY, Vol. 133, N° 2 (04/2017)  

[article]  inCOLORATION TECHNOLOGY > Vol. 133, N° 2 (04/2017) . - p. 158-164 Titre : Synthesis of yellow pyridonylazo colorants and their application in dye-pigment hybrid colour filters for liquid crystal display Type de document : texte imprimé Auteurs : Jong Min Park, Auteur ; Chang Young Jung, Auteur ; Wang Yao, Auteur ; Cheol Jun Song, Auteur ; Jae Yun Jaung, Auteur Année de publication : 2017 Article en page(s) : p. 158-164 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Propriétés optiques Colorants -- Solubilité Colorants -- Synthèse Colorants azoïques Cristaux liquides Encre Filtres Jaune Résonance magnétique nucléaire Stabilité thermique Thermogravimétrie Index. décimale : 667.2 Colorants et pigments Résumé : Nine yellow azo dyes were designed and synthesised by using different diazo components and pyridonyl coupling components for application in dye–pigment hybrid colour filters for liquid crystal displays. The synthesised dyes were characterised by proton nuclear magnetic resonance and elemental analysis. The thermal stability was examined by thermogravimetric analysis, and solubility was estimated in industrial solvents such as N-methyl-2-pyrrolidone and propylene glycol methyl ether acetate. The dyes, which exhibited suitable physical properties for use in a dye–pigment hybrid colour filter, were fabricated into colour filters, and their optical properties were measured. Note de contenu : - Synthesis - Preparation of hybrid ink based on dye-pigment - Fabrication of colour filters with hybrid ink - Investigation of dye solubility - Investigation of thermal stability DOI : 10.1111/cote.12260 En ligne : https://drive.google.com/file/d/1RSgyaF3s2pieRUjrrcfiDkgOCAfxK4Gv/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28229 [article]

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Tautomerism, crystal structure, and copper(II) complexation of isomeric pyridonylazo dyes derived from 2- and 4-aminobenzoic acids / Yue-Hua Wang in COLORATION TECHNOLOGY, Vol. 132, N° 6 (12/2016)  

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Tenue au feu des sièges : le mélange laine/para-aramide / Xavier Flambard in TEXTILES A USAGES TECHNIQUES (TUT), N° 56 (2e trimestre 2005)

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The effect of carbon nanotubes loaded with 2-mercaptobenzothiazole in epoxy-based coatings / Kunal V. Yeole in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)  

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The importance of hydration / Tobias Dorn in EUROPEAN COATINGS JOURNAL (ECJ), N° 9 (09/2019)  

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The microstructure changes of collagen fibres introduced by a novel metal complex : Zr-Al-Ti / Chen Yining in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 1 (01-02/2018)  

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The reinforcing effect of crosslinkable waterborne polyurethane/polysiloxane composite emulsion by aqueous sol–gel method / Yan Wu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)  

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Thermal characterization and pyrolysis of waste leather treated with CoCl2 and MnCl2 / E. Bañón in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 2 (02/2021)  

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Thermal stability and degradation kinetics of vegetable-tanned collagen fiber with in-situ precipitated calcium cabonate / Jie Liu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 11 (11/2018)  

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Thermogravimetric analysis and pyrolysis kinetics of tannery wastes in an inert atmosphere / Lan Luo in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 4 (04/2020)  

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Thermogravimetric analysis of copper(II) soaps derived from azadirecta indica (neem) and pongamia pinnata (karanj) non-edible oils / Rashmi Sharma in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 50, N° 1 (01-02/2013)

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A thermogravimetric study on tannery sewage sludges in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 4 (07-08/2010)  

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Thermogravimetry / Ralf Kunze in EUROPEAN COATINGS JOURNAL (ECJ), N° 5/99 (05/1999)  

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Thermoplastic wet filament winding in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 1-2 (01-02/2017)  

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Titanium dioxide grafted with silane coupling agents and its use in blue light curing ink / Lili Wang in COLORATION TECHNOLOGY, Vol. 136, N° 1 (02/2020)  

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TPU-based porous heterostructures by combined techniques / Alessandra Longo in INTERNATIONAL POLYMER PROCESSING, Vol. 37, N° 4 (2022)  

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