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Soy protein isolate reinforced yak skin collagen edible films for ultraviolet barring function / Ruirui Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 4 (07-08/2019)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 4 (07-08/2019) . - p. 173-179 Titre : Soy protein isolate reinforced yak skin collagen edible films for ultraviolet barring function Type de document : texte imprimé Auteurs : Ruirui Wang, Auteur ; Hongru Wang, Auteur ; Yijun Yao, Auteur ; Wanli Ji, Auteur Année de publication : 2019 Article en page(s) : p. 173-179 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Allongement à la rupture Caractérisation Collagène Couches minces -- Propriétés mécaniques Couches minces -- Propriétés optiques Couches minces -- Propriétés thermiques Cuir et peau de Yak Extraction (chimie) Hydrolyse Matériaux filmogènes Perméabilité Protection contre le rayonnement ultraviolet Protéines végétales Soja et constituants Vapeur d'eau Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this study, collagen extraction from yakskin was conducted through an acid-pepsin hydrolysis process. The molecular weight (MW) of yakskin collagen was 51825 Da. An amino acid analysis showed that yakskin collagen is rich in nutrients and contains essential amino acids. The effects of SPI on the mechanical properties (tensile strength (TS) and elongation at break (EAB)), light transmittance, water vapour permeability (WVP) levels, FTIR, X-ray diffraction (XRD) patterns, thermal properties, water contact angles and yakskin collagen-based films' cross section morphologies were studied. The results showed that excellent ultraviolet barring functions were achieved from edible films with the incorporation of SPI. The edible films produced by SPI present better properties than films composed of only yakskin collagen. Yakskin collagen/SPI composite film could be more widely used in edible food packaging film. As plasticiser, sorbitol can effectively replace glycerol. It opens up a new direction for the effective utilisation of yakskin resources in Qinghai province. The paper provides information specific to yakskin in contrast to other sources of collagen. Note de contenu : - INTRODUCTION : Skin structure - EXPERIMENTAL SECTION : Materials and chemicals - Extraction of yakskin collagen - Formation of edible film - Characterisation - RESULTS AND DISCUSSION : Amino acid composition of the yakskin collagen - FTIR ANALYSIS : Optical properties analysis - Mechanical proerties analysis - elongation at break/water vapour permeability - Contact angle (CA) analysis - Thermal performance analysis - X-ray diffraction (XRD) analysis - Scanning electron microscope (SEM) analysis En ligne : https://drive.google.com/file/d/1H-tbpEkxzn1zigcmxZojhP52PpzvHhu8/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32797 [article]

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Synthesis and application of a novel cationic surfactant based on quaternary ammonium salt for leather fatliquoring / Hao Dongyan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 4 (07-08/2019)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 4 (07-08/2019) . - p. 183-190 Titre : Synthesis and application of a novel cationic surfactant based on quaternary ammonium salt for leather fatliquoring Type de document : texte imprimé Auteurs : Hao Dongyan, Auteur ; Wang Xuechuan, Auteur ; Li Ji, Auteur ; Sun Siwei, Auteur ; Wang Wanni, Auteur Année de publication : 2019 Article en page(s) : p. 183-190 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorption Alkylammonium quaternaire Caractérisation Composés organiques -- Synthèse Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux -- Propriétés physiques Douceur (toucher) Huiles et graisses Huiles et graisses -- Absorption Produits de nourriture du cuir Surfactants Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A fatliquor is an indispensable agent for leather, giving softness, fullness and elasticity. A quaternary ammonium salt cationic surfactant (cetyl-dimethyl-(3-methacrylamide) propyl bromide (DMPC16)) was synthesised from N-(3-dimethylaminopropyl) methacrylamide (DMAPMA) and hexadecane bromide by nucleophilic substitution reaction. The structure and properties of quaternary ammonium cationic surfactant were characterised by FTIR, 1H-NMR, elemental analyser, TGA and surface tension analyser. Further, it was applied in the fatliquoring process of wet-white (Clariant EasyWhiteTan F-90 tanning system to test the physical and mechanical properties, softness, air permeability and absorptivity of the fatliquoring leather. The results showed that quaternary ammonium salt cationic surfactant was successfully prepared, and its surface tension was 31.87mN/m. The application tests showed that the absorption rate of fatliquor reached 97.8%. At the same time, the softness and physical and mechanical properties of the treated leather were improved, including softness increased by 109%, tensile strength increased by 17.2%, tear strength increased by 50.1%, and air permeability increased by 891.21L/(cm2.h). The results showed that quaternary ammonium cationic surfactant had good fatliquoring properties in F-90 tanning system, which can improve the softness, tensile strength and tear strength of leather. Note de contenu : - EXPERIMENTAL SECTION : Materials - Synthesis of quaternary ammonium salt cationic surfactant - Characterisation - RESULTS AND DISCUSSION : FTIR analysis - H-NMR analysis - Elemental analysis - Thermal stability - Surface tension - Application of quaternary ammonium surfactant in fatliquoring of leather - Test results of physical properties of crust leather En ligne : https://drive.google.com/file/d/1vCZfMADC4GQrB8RSaGkdunFUGz6gyGvu/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32798 [article]

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Low salt preservation of Australian and New Zealand sheepskins in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 4 (07-08/2019)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 4 (07-08/2019) . - p. 191-201 Titre : Low salt preservation of Australian and New Zealand sheepskins Type de document : texte imprimé Année de publication : 2019 Article en page(s) : p. 191-201 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens Chlorure de sodium -- Suppression ou remplacement Citrique, Acide L'acide citrique est un acide alpha hydroxylé de formule C6H8O7. Il joue un rôle central dans le métabolisme de tous les organismes vivants et tient son nom de son origine; le citron. L'acide citrique est biodégradable et n'est pas toxique pour l'homme ni pour l'environnement. Cependant, comme tout acide, il est irritant et peut provoquer des brûlures s'il entre en contact prolongé avec des muqueuses. À pH physiologique, il est présent sous forme de sa base conjuguée, le citrate, qui est un chélateur de l'ion calcium dans le sang. Cuir nappa Cuirs et peaux -- Conservation Cuirs et peaux de moutons Oxalique, Acide L'acide oxalique de structure HOOC-COOH, l'acide éthanedioïque d'après la nomenclature officielle est le plus simple des acides dicarboxyliques aliphatiques. Le produit commercial est un dihydrate, HOOC-COOH,2H2O Grâce à la liaison entre les deux groupes carboxyles, il est l'un des acides organiques les plus utilisés (pKA1 = 1,27 et pKA2 = 4,27) car il se décompose facilement en gaz (CO2, CO). Les anions de l'acide oxalique ainsi que les sels et esters sont connus sous le nom d'oxalates. Encore appelé sel d'oseille, on le trouve à l'état naturel sous forme d'oxalate de potassium ou de calcium dans les racines et rhizomes de nombreuses plantes telles que l'oseille, la rhubarbe, la betterave et les plantes de la famille des oxalis. Les oxalates sont également présents dans l'urine animale et humaine. Ils forment aussi des composés minéraux dans les rognons de silex. Produits de conservation du cuir Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The current and long established methods for preserving skins in Australia and New Zealand are described. These methods use large amounts of sodium chloride plus combinations of up to three biocides which are not registered in the REACH regulations. This paper describes work carried out to develop a method of low salt preservation (LSP) with auxiliaries used widely in the food and beverage industries and this was achieved. Note de contenu : - INTRODUCTION : Background information on methods and science for preserving raw hides and skins - Removal of salt from effluent - Objective of this work - EXPERIMENTAL PROCEDURES : Chemicals used - Pilot tannery trials in New Zealand - Bulk trials in NZ - Test methods - De-pickle process used for New Zealand processed LSP skins - Washing and bleaching wool removed after fellmongering - RESULTS AND DISCUSSION : Trials with oxalic acid - Trial using dichlorophen - Pilot tannery trials using citric acid and alternative fungicides - Water contents of skins in New Zealand - On processing of NZ LSP skins into finished leather - Fellmongery and processing for nappa - LSP trials using Australian skins En ligne : https://drive.google.com/file/d/1vJedHkpFYQE3NG1UQAhyJC6hNMMsuR1a/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32799 [article]

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Development of nanocomposites with flame retardant effect for leather and fabric / Anna Bacardit in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 4 (07-08/2019)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 4 (07-08/2019) . - p. 202-207 Titre : Development of nanocomposites with flame retardant effect for leather and fabric Type de document : texte imprimé Auteurs : Anna Bacardit, Auteur ; Concepcio Casas, Auteur ; Jordi Bou, Auteur ; Lluis Ollé, Auteur Année de publication : 2019 Article en page(s) : p. 202-207 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Encapsulation Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Matériaux hybrides Nanocapsules Nanoparticules Polymères Sièges Textiles et tissus Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The main objective of this work is to develop new nanocomposites to apply on the substrates of the leather and textile industry for seats of spaces and public vehicles. Specifically, we want to obtain a flame retardant effect using nanostructured coatings that confer thermal stability and fire resistance. The different nanomaterials should be included in a polymeric matrix ; the hybrid organic-inorganic polymers will act as carriers of the nanomaterials, with the ability to interact with the nanoparticles and walls of the nanocapsules. In addition, they must show affinity for the collagen, in order to be introduced in the three-dimensional structure of leather and fixing them on its surface, as well as interacting with the textile substrate. The flame retardant capacity of the two synthesised products has been achieved according to regulations UNE-EN 1021:06 part 1 and 2 and standard UNE 23723 : 1990. Note de contenu : - EXPERIMENTAL PART : Synthesis of nanocomposites to obtain a fireproof leather and fabric - Characterisation of developed products - RESULTS : Characterisation of developed products - Synthesis of nanocomposites to obtain a fireproof leather and fabric En ligne : https://drive.google.com/file/d/1io5ezaKiWoCsj6nNT-YX0lKWx8GsnfkV/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32800 [article]

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Organic fluorosilicone modified polyacrylate emulsion finishing agent / Sui Zhihui in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 4 (07-08/2019)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 4 (07-08/2019) . - p. 208-212 Titre : Organic fluorosilicone modified polyacrylate emulsion finishing agent Type de document : texte imprimé Auteurs : Sui Zhihui, Auteur ; San Jinglong, Auteur ; Wang Xu, Auteur ; Zu Bin, Auteur ; Cao Xiangyu, Auteur ; Qiang Xihuai, Auteur Année de publication : 2019 Article en page(s) : p. 208-212 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Copolymères Cuirs et peaux -- Finition Fluoropolymères Hydrophobie Latex Polyacrylates Polymères en émulsion Polymérisation en émulsion Résistance thermique Revêtements antisalissures Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In order to improve the hydrophobicity and applied properties of leather products, 3- (Trimethoxysilyl)propyl methacrylate (KH-570) and Dodecafluoroheptyl methacrylate (G04) were used as modified monomers preparing a fluorosilicone polyacrylate leather finishing agent by semi-continuous seed emulsion polymerisation. The structure of the prepared latex film was characterised and analysed by FTIR and XPS. The effects of the addition of silicone monomer on the latex film and the application properties were investigated by SEM and TG. The results showed that: both the organic fluorine and the silicone monomers participated in the polymerisation, and the particle size of the emulsion was 50-70nm. XPS showed that the fluorine and silicon elements in the film-air interface were 1.74% and 3.12% higher than the theoretical values. SEM showed that the surface microstructure of the latex film of the fluorosilicone copolymer emulsion was relatively rough, and the roughness was helpful to further improve the hydrophobicity and antifouling property of the finished leather. TG showed that, after the addition of silicone monomer, the heat resistance of the film was obviously improved. Compared with fluorinated polyacrylate emulsion, the contact angle of the leather sample finished by organo fluorosilicone polyacrylate emulsion to water increased about 7°. The applied properties of the finished leather were also improved. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Preparation of fluorosilicone polyacrylate - Finishing technology of leather - FTIR characterisation of polymer film - Testing of emulsion particle size - XPS analysis of latex film surface - SEM analysis of latex film - TG analysis of latex film - Contact angle of finished leather to water - Testing of the finished leather applied properties - RESULTS AND DISCUSSION : FTIR analysis of latex film - XPS analysis of latex film - Scanning electron microscopy of latex film - Measurement of contact angle of leather to water - Testing of the finished leather applied properties En ligne : https://drive.google.com/file/d/1Au_o7I11Y6vnpVSH9P51Ieebo4ZKsFs1/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32801 [article]

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Preparation and application of modified corn straw as a biosorbent for Cr(VI) adsorption / Zeng Chunhui in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 4 (07-08/2019)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 4 (07-08/2019) . - p. 213-218 Titre : Preparation and application of modified corn straw as a biosorbent for Cr(VI) adsorption Type de document : texte imprimé Auteurs : Zeng Chunhui, Auteur ; Zhang Ye, Auteur ; Xu Zhang, Auteur ; Qi Lu, Auteur Année de publication : 2019 Article en page(s) : p. 213-218 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption Biosorbant Caractérisation Chimie analytique Chrome hexavalent Eaux usées -- Epuration Maïs et constituants Paille Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Modified corn straw, MCS, was prepared by pretreatment and esterification modification technology. The optimisation and mechanism of Cr(VI) adsorption performance was critically investigated via orthogonal experimental design and single-factor comparison experiments. Experimental results indicated that the MCS dosage and pH value had the greatest effect on the Cr(VI) adsorption process. Moreover, the Cr(VI) adsorption rate (CrAR) and maximum adsorption capacity (CrAC) were 96.8 % and 121mg/g respectively under the optimal condition (MCS dosage : 0.04g, adsorption time: 45 minutes, pH3, adsorption temperature: 40°C, Cr(VI) initial concentration : 10mg/L), which was an increase of 10.3 times compared to unmodified corn straw. FTIR analysis testified that carboxyl and ester groups were introduced into the MCS. Meanwhile, it turned out that the cellulose structure ctf MCS was found to be more orderly by SEM analysis than that of CS. The MCS might show great potentiel for application in the adsorption of Cr(VI) in tannery wastewater as a new type of biosorbent. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Preparation of modified corn stalk (MCS) - Adsorption tests of Cr(VI) by MCS - Characterisation - RESULTS AND DISCUSSION : Orthogonal experiment results - Influence of MCS dosage on Cr(VI) adsorption - Influence of pH on Cr(VI) adsorption - Influence of temperature on Cr(VI) adsorption - SEM analysis - FTIR analysis En ligne : https://drive.google.com/file/d/1_QV07J2Xpn1E49OcWjF4xdTICk767T2s/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32802 [article]

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