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A novel non-pickling combination tanning for chrome-free leather based on reactive benzesulphonate and tannic acid / Yuanhang Xiao in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 1 (01/2020)
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Titre : A novel non-pickling combination tanning for chrome-free leather based on reactive benzesulphonate and tannic acid Type de document : texte imprimé Auteurs : Yuanhang Xiao, Auteur ; Chunhua Wang, Auteur ; Jun Sang, Auteur ; Wei Lin, Auteur Année de publication : 2020 Article en page(s) : p. 16-22 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorption
Analyse quantitative (chimie)
Benzène sulfonate
Colorimétrie
Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de chèvres
Mesure
pH -- Mesure
Photostabilité
Potentiel zeta
Taille des particules
Tanins
Tannage chrome free
Tannage combinéLe tannage combiné se dit des tannages qui allient deux familles ou genre de tannage pour obtenir un résultat additionnant les qualités complémentaires des tannins mis en œuvre par exemple Chrome-Végétal ou Chrome-Synthétique
Température de retraitIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A non-pickling combination tanning based on reactive benzenesulphonate (rBS) and Tannic acid (TA) has been developed for the chrome-free leather manufacturing. By optimizing the tanning process, the two-bath combination tanning with 4% rBS and 10% TA at the final pH 3.0-3.5 can raise the shrinkage temperature (Ts) of goatskins to -86°C. Morphological analysis results reveal that the chrome-free leather exhibits a clear even grain surface and isolated collagen fiber network structure. The novel combination tanning approach not only improves light fastness, but also confers high physical and mechanical properties to the chrome-free leather which can meet the Chinese standard requirements for furniture leather and shoe upper leather. The non-pickling tanning without use of salt or acid is also benefit to clean leather-making production. Note de contenu : - EXPERIMENTS : Materials - Particle size determination of TA and rBS - Tanning process - Determination of shrinkage temperature - Measurement of the uptake of TA - Zeta potential measurements - SEM analysis - Determination of color difference - Physical and mechanical properties measurements
- RESULT AND DISCUSSION : Optimization of rBS and Ta combination tanning combination tanning methods - The dosage of rBS and TA - Final pH - Zeta potential analysis - The synergistic tanning mechanism of rBS and TA - Color difference analysisDOI : https://doi.org/10.34314/jalca.v115i1.1464 En ligne : https://drive.google.com/file/d/1l3B3xNVwSsBqCpy7R5W4NHysSxHHVE0P/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33393
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Code-barres Cote Support Localisation Section Disponibilité 21484 - Périodique Bibliothèque principale Documentaires Disponible Performance of sulfonated dimeric malenised soya fatty acid as a leather fatliquor / R. Janardhanan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 4 (04/2012)
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Titre : Performance of sulfonated dimeric malenised soya fatty acid as a leather fatliquor Type de document : texte imprimé Auteurs : R. Janardhanan, Auteur ; V. Vijayabaskar, Auteur ; B. S. R. Reddy, Auteur Année de publication : 2012 Article en page(s) : p. 128-136 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acides gras
Cuirs et peaux -- Conservation
Dimères
Energie de surface
Huile de soja
Potentiel zeta
Sulfoniques, Acides
SurfactantsIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : A change of molecular structure improves the surface active efficiency of new generation gemini surfactants. As a result, it was confirmed that the dosage could be reduced considerably in industrial applications as performance chemicals, leading to economically quantifiable benefits. The performance of newly synthesized gemini surfactant based sulfonated dimeric malenised soya fatty acid bridged with butane diol was evaluated as a leather fatliquor. The chemical parameters of the fatliquors were analysed and tested on leather. The properties imparted by the fatliquor to leather were studied qualitatively and quantitatively. SEM studies of the treated leathers revealed better penetration of the gemini surfactant based fatliquor compared to the control. Results were correlated in terms of emulsification power, zeta potential and particle size of the surfactants, found to be better than the conventional surfactant. The surface energy was calculated for the fatliquors and found to be equal. Note de contenu : - MATERIALS AND METHODS : Formulation of fatliquors - Synthesis of sulphonated gemini surfactants
- RESULTS AND DISCUSSION : Chemical analyses of FL R, FL 1 and FL 2 fatliquors - Leather properties
- TABLE I : Leather fatliquor process - Zeta potential - Surface energy - Particle size
- TABLE II : Organoleptic properties of FL 1/FLR and FL 2/FLR
- TABLE III : Physical testing results of FL 1/FLR and FL 2/FLR
- TABLE IV : Emulsification power of surfactantsEn ligne : https://drive.google.com/file/d/1Ob8iE3Nbow8V7itSIGGo6-CwBWMiqkjs/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14687
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Code-barres Cote Support Localisation Section Disponibilité 13874 - Périodique Bibliothèque principale Documentaires Disponible Polyamic acid : nanoprecipitation and electrophoretic deposition on porous supports / Libor Brabec in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 3 (05/2018)
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Titre : Polyamic acid : nanoprecipitation and electrophoretic deposition on porous supports Type de document : texte imprimé Auteurs : Libor Brabec, Auteur ; Petr Sysel, Auteur ; Jan Plsek, Auteur ; Milan Kocirik, Auteur ; James H. Dickerson, Auteur Année de publication : 2018 Article en page(s) : p. 489-496 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dépôt électrophorétique
Diméthylsulfoxyde
Matériaux poreux
Polyimides
Polymères -- Synthèse
Potentiel zeta
Précipitation (chimie)Index. décimale : 667.9 Revêtements et enduits Résumé : Polyamic acid (PAA, a precursor of polyimide) was synthesized from 4,4′-oxydiphthalic anhydride and 4,4′-oxydianiline. PAA, dissolved in dimethylsulfoxide (DMSO), was precipitated into colloidal particles after its injection into acetone. The resulting particle size distribution was found to depend on aging time of PAA solutions, their concentration, and the manner in which the solutions were mixed with acetone. PAA particles of any size down to 10 nm appeared to be achievable by decreasing the acetone/DMSO ratio. Particles in DMSO/acetone suspensions were found to have a significant negative zeta potential. Therefore, there was no need to add organic bases to form PAA anions, in contrast to all previously published studies on the PAA electrodeposition. EPD was performed onto porous stainless-steel or alumina disks, which are suitable supports (reinforcements) for membranes. The slow evaporation of DMSO residue yielded dried polymer layers, comprised of 50–100 nm PAA globules. The outer surface of layers was usually covered with a very thin, continuous PAA skin. Such supported PAA layers—after a simple imidization step via a heat treatment—could be applied as thermally resistant membranes for gas separation. Note de contenu : - EXPERIMENTAL : Chemicals - Synthesis of PAA - Imidization of PAA layers - Precipitation of PAA - PAA particles characterization - Porous supports - EPD cell and parameters
- RESULTS AND DISCUSSION : Precipitation - fresh and aged PAA solutions - Precipitation of PAA and PAA-APTES under various mixing conditions - Zeta potential of precipitated particles - PAA layers formed by EPD - Layers deposited on porous stainless-steel disks - Layers deposited on porous alumina disksDOI : 10.1007/s11998-017-0004-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-0004-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30745
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Code-barres Cote Support Localisation Section Disponibilité 20024 - Périodique Bibliothèque principale Documentaires Disponible Polyethylene glycol as a preservative for pigskin and its interaction with collagen / Chunhua Wang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 10 (10/2018)
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Titre : Polyethylene glycol as a preservative for pigskin and its interaction with collagen Type de document : texte imprimé Auteurs : Chunhua Wang, Auteur ; Huijuan Peng, Auteur ; Jun Sang ; Wei Lin Année de publication : 2018 Article en page(s) : p. 326-334 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse thermique
Collagène
Cuirs et peaux -- Conservation
Cuirs et peaux de porcs
Fourier, Spectroscopie infrarouge à transformée de
Microscopie à force atomique
Poids moléculaires
Polyéthylène glycol
Potentiel zeta
Solutions de polymèreIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Herein, an immersing method for the pigskin preservation by using polyethylene glycol (PEG) with different molecular weights (Mw = 200, 600, 6000) was developed and the influence of PEG on the conformation of type I collagen was investigated. Only PEG200 followed dehydration and rehydration patterns similar to that of salt curing and exhibits reasonably good preservative and bloodstains removal effects. Zeta potential analyses show that the collagen-PEG solutions have good dispersions stability. FT-IR and US-DSC results indicate that collagen triple helixes are kept integrated in the presence of PEG, and the highly hydrated feature of PEG helps to maintain the stability of the protein conformation. Atomic Force Microscope (AFM) images show that the collagen fibrils become more dispersed with the increasing Mw of PEG. The present work gives positive insight to partially replacing sodium chloride for the preservation of raw hide and skin, as well as the development of PEG-collagen biomaterials. Note de contenu : - EXPERIMENTAL : Materials - Preservation test with PEG - Inhibition zone test of PEG - Preparation of PEG-collagen samples - Zeta potential measurement - Fourier transform infrared spectroscopy (FT-IR) measurement - Ultra-sensitive differential scanning calorimeter (US-DSC) - Atomic force microscope (AFM) observation En ligne : https://drive.google.com/file/d/1LRY2hiHjLp_KYBqpszPrrHZyBO1vHOjE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31092
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Code-barres Cote Support Localisation Section Disponibilité 20280 - Périodique Bibliothèque principale Documentaires Disponible Potentilla erecta (L.) raeusch as an alternative source of environmentally friendly polyphenols for leather tanning / Virgilijus Valeika in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 6 (06/2018)
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Titre : Potentilla erecta (L.) raeusch as an alternative source of environmentally friendly polyphenols for leather tanning Type de document : texte imprimé Auteurs : Virgilijus Valeika, Auteur ; Birute Sapijanskaite, Auteur ; Justa Sirvaityte, Auteur ; Viktoriia Plavan, Auteur ; Rasa Alaburdaite, Auteur Année de publication : 2018 Article en page(s) : p. 183-191 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Flavonoïdes
Fourier, Spectroscopie infrarouge à transformée de
Granulométrie
Plantes à tanins
Poids moléculaires
Polyphénols
Potentiel zeta
Spectroscopie de la résonance magnétique nucléaire
Tanins végétaux
Tannage végétalIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : High content of polyphenols in plant extracts explains their biological activitity. These extracts also can be used in antimicrobial therapy as an alternative to chemical drugs. A large number of hydroxyl and other functional groups in the polyphenols preconditions formation of strong cross-links with proteins and other macromolecules. The leather tanning technology, known as vegetable tanning, was the prevailing process for leather manufacturers over centuries until it has gradually been displaced by tanning with a use of inorganic chromium compounds by the end of the 19th century. Unfortunately, the vegetable sources with importance for leather tanning are limited in number of plant materials. Potentilla is considered as a tannin-rich plant. It is estimated that tannin content in Potentilla Erecta (L.) Raeusch is approx. 15-22%. The results of the present study have shown that Potentilla Erecta (L.) Raeusch can be characterized as a potential tannin rich plant source for leather tanning industry. The extracts of Potentilla mainly contain condensed tannins, but also some amounts of hydrolysable tannins are present. The yield of the extractives from Potentilla rootstocks was found to be 21.3%: 11.5% tannins and 9.8% non-tannins. The tannin content in Potentilla is comparable to the ones extracted from Ouebracho and Chestnut wood, tannins that are used widely in leather industry. Note de contenu : - MATERIALS
- METHODS : Preparation of plant extracts - Total content of phenolic compounds - Determination of total flavonoid content - DPPH scavenging activity - Analysis of tannin content (hide-powder test) - FTIR-spectroscopy - NMR spectroscopy - Particle size distribution - Zeta potential measurements - Molecular weight distribution - Leather tanning
- FTIR SPECTRA OF TANNINS : Physica characteristics - NMR spectra - Bioactivity - Tanning ability - Leather tanningEn ligne : https://drive.google.com/file/d/10WsOt13IBXWqBxmfso4NP4baZv8aYxaI/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30687
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Code-barres Cote Support Localisation Section Disponibilité 19986 - Périodique Bibliothèque principale Documentaires Disponible Preparation and properties of nano-ZnO/organic fluorine modified polyacrylate finishing agent / Sui Zhihui in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 6 (06/2020)
PermalinkPreparation in presence of urushiol and properties of acrylate latex with interparticle bridges / Jianhong Yang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)
PermalinkPreparation of formaldehyde-free melamine resin using furfural as condensation agent and its retanning performances investigation / Zhou Ji-Bo in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 6 (06/2018)
PermalinkPreparation of polyurethane acrylate-based titanium dioxide pigment and its use in blue light-curable ink / Chenlong Wang in COLORATION TECHNOLOGY, Vol. 137, N° 4 (12/07/2021)
PermalinkQuantitative determinations of isoelectric point of retanned leather and distribution of retanning agent / Ying Song in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 7 (07/2018)
PermalinkRaw skin wastes - used to prepare a flocculant for the treatment of black liquor for papermaking / Chi Yuanlong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 5 (09-10/2011)
PermalinkReconstituted leather made using a core-shell polyacrylate adhesive / Yi Jie in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 2 (03-04/2013)
PermalinkRelease of free formaldehyde in THP salt tannages / Li Ya in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 4 (07-08/2008)
PermalinkPermalinkStudy on interaction mechanism between neutral salts and collagen by combining experiments with molecular dynamics simulation / Min Gu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 7 (07/2023)
PermalinkSurface analysis of particles / C. Bellmann in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B1 (03/2006)
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PermalinkSurface charge and isoelectric point of leather : a novel determination method and its application in leather making / Ya-Nan Wang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 7 (07/2017)
PermalinkSynthesis and retanning performance of a novel melamine resin with ultralow formaldehyde content / Zhou Ji-Bo in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 1 (01/2023)
PermalinkSynthesis of multi-site polyether amine triazine derivative for sustainable leather manufacturing / Xinju Jia in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 4 (04/2022)
PermalinkSynthesis of a waterborne melamine resin and its retanning behaviors investigation / Ning Guo-Qiang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 7 (07/2022)
PermalinkSynthesis of xylitol-based hyperbranched polyurethane acrylate and its application in self-matting acrylate coatings / Ruijun Lin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 5 (09/2023)
PermalinkTanning performance of a novel chrome-free complex tanning agent : penetration and distribution / Zhen Wang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 8 (08/2021)
PermalinkThe best for red and yellow / Frank Kleinsteinberg in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 206, N° 4618 (03/2016)
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