An effective way to prepare high performance biomass-based fatliquoring agent - Bromination modification of rapeseed oil and its fatliquoring and flame-retardant properties / Tao Luo in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 8 (08/2023)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 8 (08/2023) . - p. 346-353 Titre : An effective way to prepare high performance biomass-based fatliquoring agent - Bromination modification of rapeseed oil and its fatliquoring and flame-retardant properties Type de document : texte imprimé Auteurs : Tao Luo, Auteur ; Xu Zhang, Auteur ; Biyu Peng, Auteur ; Chunxiao Zhang, Auteur ; Sadaqat Ali Chattha, Auteur Année de publication : 2023 Article en page(s) : p. 346-353 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorption Analyse sensorielle Biomasse Bromation Substitution dans une molécule d'un atome d'hydrogène par un atome de brome. Combustion Croûte (cuir) On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés. Cuirs et peaux -- Analyse Douceur (toucher) Essais accélérés (technologie) Essais de résilience Fourier, Spectroscopie infrarouge à transformée de Huile de colza Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Produits de nourriture du cuir Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : With the implementation of Carbon Neutralization strategy, it is urgently needed to develop low-carbon leather chemicals through replacing petrochemicals with biomass-based raw materials in leather industry. To solve the problems existing in the leather fatliquored by the biomass-based fatliquoring agents made from vegetable oils with high unsaturation, such as poor storability, unpleasant odor, yellowing and possible formation of hexavalent chromium, the strategy was put forward, improving the oil saturation through the double bonds addition reaction with halogen to solve the abovementioned problems resulting from the poor oxidation resistance of oil, and increase the binding ability of the oil with leather fibers and endow the leather with flame-retardant simultaneously. In this paper, the methods of modified rapeseed oil by bromine addition and its fatliquoring and flame-retardant properties were studied. The results showed that the bromine addition reaction of rapeseed oil was easy to proceed and the iodine value of the modified oil decreased almost linearly with the added amount of bromine. The binding and antioxidant properties of the oil and the physical properties of the fatliquored leather were significantly improved with the increase degree of bromination modification. Furthermore, above mentioned unpleasant odor, yellowing and hexavalent chromium formation problems were effectively solved when the iodine value of modified fatliquors was reduced to 31 g I2/100 g. Additionally, brominemodified rapeseed oil could endow leather with good flame-retardant properties and the fatliquored leather was changed from combustible to flame-retardant material with the increasing amount of bromine in the oil. The limit oxygen index (LOI) increased from 24% to 31%, the flame combustion time decreased from 127.0 s to 4.3 s, and the flameless combustion time decreased from 28.5 s to 0.0 s. This study provided an effective way to develop biomass-based and low-carbon fatliquors based on natural unsaturated oils. Note de contenu : - MATERIALS AND METHODS : Materials - Bromination modification of rapessed oil - Preparation of leather fatliquoring agent - Application of fatliquors in the fatliquoring process - Determination of the iodine value of oils - Fourier Transform Infrared Spectroscopy (FT-IR) of oils - Absorption rate of fatliquors - Distribution of Br element and collagen fibers - Binding ability of modified oils with leather fibers - Limiting oxygen index (LOI) test of crust leather - Vertical combustion test of crust leather - Ageing test of crust leather - Odor level evaluation of crust leather - Yellowing resistance property of crust leather - Softness and physical properties of crust leather - RESULTS AND DISCUSSION : Preparation and characterization of bromine-modified rapessed oil - Absorption rate of oil and its distribution in leather - Effect of rapessed oil modification degree on the properties of fatliquored leather - Table 1 : Absorption rate of fatliquors - Table 2 : Oil extraction test results - Table 3 : Leather vertical combustion test results - Table 4 : Leather softness test results DOI : https://doi.org/10.34314/jalca.v118i8.8092 En ligne : https://drive.google.com/file/d/12reqFQXSFwDRWiNVXr_pFHQVWb2biTpR/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39674 [article]

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Application of carboxyl-functionalized epoxy resin in the leather tanning process / Bin Lyu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 7 (07/2018)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIII, N° 7 (07/2018) . - p. 225-231 Titre : Application of carboxyl-functionalized epoxy resin in the leather tanning process Type de document : texte imprimé Auteurs : Bin Lyu, Auteur ; Li Yajuan, Auteur ; Dangge Gao, Auteur ; Jianzhong Ma, Auteur ; Lv Leihong, Auteur Année de publication : 2018 Article en page(s) : p. 225-231 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuir -- Teneur en chrome hexavalent Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux -- Propriétés physiques Détérioration enzymatique Douceur (toucher) Eaux usées -- Teneur en chrome hexavalent Epoxydes Groupement carboxyle Polymères -- Synthèse Réactions chimiques Stabilité hydrothermale Tannage Température de retrait Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Chrome tanning is widely used in the tanning process ; however, it can cause environmental pollution. Leather tanned with epoxy resin was considered as a more environmentally friendlyprocess, but it takes as long as five days for reaction, and results in poor performance of leather. The aim of the present study was to tan leather collagen with a carboxyl-functionalized epoxy resin, which was thought to be an eco-friendly tanning process and the reaction time was shortened to 12h. The reaction between carboxyl-functionalized epoxy resin and leather collagen can be divided into two stages, the reaction of epoxy group with leather collagen and the reaction of carboxyl group with leather collagen. The influences of tanning conditions (medium pH, epoxy resin amount and reaction time) on the properties of tanned leather were also discussed. In the first stage, the epoxy group was reacted with leather collagen in basic conditions. The results showed that the carboxyl-functionalized epoxy resin could better penetrate into the leather fibers when the pH value was 8.5, and the best effect of tanned leather collagen was found using reaction condition of pH 7.0. In the second stage, it was the reaction of carboxyl group to leather collagen in acid conditions, and the best effect was found under the condition of pH was 3.5. Meanwhile, it provided a better tanning effect when the carboxyl-functionalized epoxy resin amount was 6% and the reaction time was 12h. The chrome-less tanning process that carboxyl-functionalized epoxy resin combination with 3% chrome was studied. The results showed that the hydrothermal stability and strength properties of leather tanned by carboxyl-functionalized epoxy resin with 3% chrome were close, even superior, to those of the leather produced by conventional chrome tanning with 8% chrome. Note de contenu : - MATERIALS AND METHODS : - Material - Methods : Synthesis of the carboxyl-functionalized epoxy resin - Tanning methodology - Testing and characterization : Shrinkage temperature - Thickness increment ratio - Mechanical properties - Softness - Enzymatic degradation - Chrome content in leather and waste water - Calculation - RESULTS : - Tanning conditions of carboxyl-functionalized epoxy resin pH : The amount of tanning agent - Chrome-less tanning results : SEM topography of the leather - Physical properties - Mechanical properties - Softness - Enzymatic degradation - Chrome content in leather and waste water En ligne : https://drive.google.com/file/d/1zAn7Cgd6nhD2xonUrhpGkK5uE09EybTG/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30830 [article]

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Augmentation of garment sheepskin type properties in goatskins : Role of chromium-silica tanning agent / N. N. Fathima in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 6 (11-12/2003)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 87, N° 6 (11-12/2003) . - p. Titre : Augmentation of garment sheepskin type properties in goatskins : Role of chromium-silica tanning agent Type de document : texte imprimé Auteurs : N. N. Fathima, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Balachandran Unni Nair, Auteur Année de publication : 2003 Article en page(s) : p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage Analyse sensorielle Chrome Cuirs et peaux -- Propriétés organoleptiques Cuirs et peaux -- Propriétés physiques Cuirs et peaux de chèvres Cuirs et peaux de moutons Douceur (toucher) Liqueurs de tannage -- Analyse Silice La silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux. La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...). Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale. Tannage minéral Tannage dans lequel interviennent différents minéraux. Le plus répandu est le tannage aux sels de chrome, mais aussi à l’aluminium Température de retrait Vêtements en cuir Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The task of producing garment leathers from goatskins is challenging owing to the compactness of the corium and the roughness of the grain surface, thus, to achieve the characteristics of garment leathers made from hair sheepskins, the choice of tanning system is critical. Treatment with silicates produces leathers, which have good softness and fluffiness. Since silica does not give the desired shrinkage temperature; chromium has been incorporated in the tanning agent. In this present study, a new chrome-silica tanning agent has been prepared to make garment leathers from goatskins with sheep-like characteristics. This tanning agent exhibits additional benefits because of its chrome saving approach. The percentage exhaustion of chrome is increased from a conventional 70 % to 90 % and analysis of spent tan liquor shows reduction in TDS and COD values. The leathers made with this tanning agent are soft, have smooth grain and fluffiness. A hairsheep-like character results from tanning goatskins with this new eco-friendly chrome-silica tanning agent. Note de contenu : - EXPERIMENTAL PROCEDURES : - Materials - Preparation of the chrome-silica tanning agent - Tanning trials - Control - Post tanning - EXAMINATION OF LEATHERS : - Physical methods - Organoleptic properties - Objective assessment of softness - Analysis of spent tan liquor - Scanning Electron Microscopy examination - RESULTS AND DISCUSSION - Table 1 : Shrinkage temperature and spent tan liquor analysis - Table 2 : Physical strength characteristics of leathers En ligne : https://drive.google.com/file/d/1tAC-66rbByKxdjzz56aw7qJEJetO__ve/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39706 [article]

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Biomimetic emulsifier with cashmere touch / Audrey Manière in PERSONAL CARE EUROPE, Vol. 12, N° 2 (04/2018)  

[article]  inPERSONAL CARE EUROPE > Vol. 12, N° 2 (04/2018) . - p. 54-58 Titre : Biomimetic emulsifier with cashmere touch Type de document : texte imprimé Auteurs : Audrey Manière, Auteur ; Aurélie Trunet, Auteur ; Camille Olive, Auteur ; Carine Bezivin, Auteur ; Estelle Loing, Auteur Année de publication : 2018 Article en page(s) : p. 54-58 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Barrière cutanée Biomatériaux Chimie biomimétique Douceur (toucher) Emulsifiants Formulation (Génie chimique) Hydratation Ingrédients cosmétiques Peau -- Soins et hygiène Phospholipides Index. décimale : 668.5 Parfums et cosmétiques Résumé : Choosing the right emulsifier is crucial for the success of a formulation. Biophilic H is a naturel phospholipid-based emulsifier with highly desirable properties. Its biomimetic lamellar structure guarantees strong biocompatibility and optimal skin tolerance. It is a performant emulsifier, capable of emulsifying up to 30% all on itself and compatible with all kinds of alls, pigments, as well as chemical and physical UV filters. its content in saturated lecithin provides important thickening properties and allow the formulation of white and odorless emulsions of various consistency, from cream to butter, with excellent spreadability. it also texturises formulations with a soft cashmere touch. Biophilic H is more than a performant emulsifier. it also acts as an efficient delivery system assuring more effective and faster diffusion of actives. On top of that, it has biological activities that help maintain skin functions, such has hydration and berner function. lt also shows immediate skin smoothing action and preserves skin brightness balance. It additionally brings an outstanding and unique sensory profile as soft and sophisticated as cashmere, even allow percentage. Emotionally approved by consumers, it triggers pleasure and wellbeing upon application. Biophilic H can be associated with advertising claims such as : natural engin, biodegradable, sustainable engin, RSPO certified ingredient (available with the MB grade : Biophilic H MB), safe materials and GRAS-status (generally recognized as safe) Note de contenu : - TECHNICAL CHARACTERISTICS : Biocompatibility - Lamellar structure - Formulation characteristics - DELIVERY SYSTEM - ACTIVE PROPERTIES : Effects on hydration and barrier function - Smoothing effect and reduction of deep wrinkles appearance - Blurring effect on skin - UNIVERSAL EMOTIONAL RESPONSE PROFILE : A source of wellbeing - FIGURES : 1. Promotion of lamellar structures - 2. Biophilic H as a delivery system - 3. Effects of biophilic H on hydration and barrier function - 4. Smoothing effect of biophilic H - 5. Effect of biophilic H on skin gloss - 6. Universal emotional response profile to biophilic H - 7. Biophilic H, the biomimetic multifunctional emulsifier with a cashmere touch - TABLE : Formulation characteristics En ligne : https://drive.google.com/file/d/1zTyLjd_xjI6KfirczcimgeQBxLW5NdxH/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30448 [article]

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Chrome free tannages : Part 1 - Preliminary studies / Samir Dasgupta in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 5 (09-10/2002)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 5 (09-10/2002) . - p. 186-194 Titre : Chrome free tannages : Part 1 - Preliminary studies Type de document : texte imprimé Auteurs : Samir Dasgupta, Auteur Année de publication : 2002 Article en page(s) : p. 186-194 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux d'agneaux Douceur (toucher) Mimosa et constituants Oxazolidine Résistance à la déchirure Sels d'aluminium Sulfate de tétrakis hydroxyméthyl phosphonium Le sulfate de tétrakis hydroxyméthyl phosphonium est un myxobactéricide qui offre une prévention efficace contre les biofilms microbiens dans les eaux de traitement, et ce, pour une vaste gamme de micro-organismes formant des biofilms. Le sulfate de tétrakis (hydroxyméthyl) phosphonium agit principalement en augmentant la perméabilité de la membrane externe de l'enveloppe de la cellule microbienne, ce qui entraîne la libération rapide de protéines et d'autres substances cellulaires par les cellules. En outre, le sulfate de tétrakis (hydroxyméthyl) phosphonium inhibe le processus de sulfatoréduction dans les bactéries réductrices de sulfate. Tannage chrome free Tannage combiné Le 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 Å“uvre par exemple Chrome-Végétal ou Chrome-Synthétique Tannage minéral Tannage dans lequel interviennent différents minéraux. Le plus répandu est le tannage aux sels de chrome, mais aussi à l’aluminium Tannage synthétique Tannage végétal Température de retrait Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The object of this study was to look afresh at the basic nature of a number of already established tanning agents, like aluminium chloride, aluminium sulphate, basic aluminium formate, basic aluminium acetate, and examine their tanningactivity alone or in combination with oxazolidines, tetrakishydroxy methyl phosphonium sulphate (THPS) andvegetable tanning agents. Note de contenu : - METHODOLOGY : 1) Studies on aluminium salts - 2) Tannages with aluminium salts - 3) Treatment of vegetable tanned lambskins with THPS and oxazolidine - 4) Vegetable tanned lambskins retanned with aluminium salt - RESULTS AND DISCUSSION : 1) Separation of various aluminium salts - 2) Tannages with aluminium salts - 3) Combination tannages with aluminium salts with other agents - 4) Combination with vegetable tanning agent (Mimosa Extract Powder ME) - Table 1 : Effect of aluminium retannage on the shrinkage temperature of vegetable tanned lambskin - Table 2 : Effect of aluminium retannage on the tear strength of vegetable tanned lambskin - Table 3 : Effect of oxazolidine offer on the shrinkage temperature of vegetable tanned lambskin (final pH 6.5; temperature – 45°C) - Table 4 : Effect of THPS offer on the shrinkage temperature of vegetable tanned lambskin (final pH 5.5; temperature – 45°C) - Table 5 : Effect of temperature on shrinkage temperature of vegetable/oxazolidine combination tanned skins - Table 6a : Effect of THPS/oxazolidine E retannages on the tear strength of vegetable tanned lambskin processed at 45C - Table 6b : Effect of THPS/oxazolidine E retannages on the tear strength of vegetable tanned lambskin - Table 7 : Effect of THPS/oxazolidine E retannage on the softness of vegetable tanned lambskin En ligne : https://drive.google.com/file/d/14NvgDGrpGo8I4x_2mpV1A04aUX3r50_V/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39858 [article]

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A comparison of low temperature softness of leather lubricated with various types of fatliquor / Zhengjun Li in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 4 (07-08/2014)  

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Comparison of physico-mechanical and physical-chemical properties of leather tanned using different methods / Malgorzata Kowalska in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 6 (11-12/2015)  

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A comprehensive fuzzy evaluation method for leather softness based on its lastometer property / Huang Xun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 4 (07-08/2006)  

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A comprehensive understanding on sewability of natural biomaterial : an insight on process optimization during leather manufacture / Gladstone Christopher Jayakumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 7 (07/2021)  

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Le coup de boost à l'hygiène des cheveux / Stéphanie Neplaz in EXPRESSION COSMETIQUE, N° Hors-Série (12/2022)  

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Effect of an amphoteric chromium-free polymer retanning agent with reactive aldehyde groups on collagen fibers / Wang Xuechuan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 10 (10/2019)  

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Evaluation of leather handle character by discriminatory two class analysis / Zhang Xiao-Lei in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 5 (09-10/2007)  

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Des gélifiants d’origine végétale au toucher soyeux / Murielle Gros-Désirs in EXPRESSION COSMETIQUE, N° Hors-série (12/2020)  

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Influence of hydrophobic side chain structure on the performance of amphiphilic acrylate copolymers in leather making / Jinxia Du in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 2 (03-04/2016)  

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Insight into the correlations between fiber dispersion and physical properties of chrome tanned leather / Xiu He in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 1 (01/2020)  

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Investigation of the feasibility of using powder coating for leather finishing / M. Tozan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 84, N° 4 (07-08/2000)  

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La mesure de la douceur des produits de contention / Ivanne Soufflet in TEXTILES A USAGES TECHNIQUES (TUT), N° 56 (2e trimestre 2005)

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A method and principle of soft and transparent leather manufacturing / Xiu He in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 11 (11/2023)  

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Micellar formulation - Old wine in new skins ? / Kathrin Brandt in SOFW JOURNAL, Vol. 146, N° 3 (03/2020)  

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Mild cleansers with 'sulfate-free' surfactants / Peter Clark in GLOBAL PERSONAL CARE, Vol. 23, N° 10 (11/2022)  

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