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Preparation and application of collagen-based waterborne polyurethane retanning agent / Li Chengtao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 3 (05-06/2017)
[article]
Titre : Preparation and application of collagen-based waterborne polyurethane retanning agent Type de document : texte imprimé Auteurs : Li Chengtao, Auteur ; Qiang Taotao, Auteur ; Li Xiaoning, Auteur ; Zhao Jing, Auteur ; Ren Longfang, Auteur ; Wang Xuechuan, Auteur Année de publication : 2017 Article en page(s) : p. 149-154 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Butanediol
Charges (matériaux)
Collagène
Cuirs et peaux -- Propriétés mécaniques
Essais dynamiques
Polymères en émulsion
Polyoxytétraméthylène glycol
Polyuréthanes
PrépolymérisationConsiste à faire atteindre, à un élément drapé d'une pièce, un état de début de polymérisation suffisant pour acquérir la stabilité géométrique et la pégosité permettant sa manipulation.
Cette opération a également pour but de faciliter la mise en œuvre du produit, par exemple :
• limiter le fluage ;
• limiter le taux de matières volatiles ;
• diminuer le collant d'un préimprégné ...
Cette opération peut également consister à amorcer une légère polymérisation préalable à un mélange, une résine ou un préimprégné afin de le rendre plus adapté à sa mise en œuvre ultérieure.
La prépolymérisation permet le stockage de sous-ensembles d'une pièce en attendant l'assemblage en monophase à l'occasion de la polymérisation de l'ensemble des éléments de la pièce.
Propionique diméthylol, Acide
Retannage
Température de retrait
TriéthylamineIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A collagen-based waterborne polyurethane retanning agent was prepared by prepolymerization, using isophorone diisocyanate polytetramethylene ether glycol (PTMG, Mn-2000), 1, 4-butanediol (BDO), dimethylol propionic acid (DMPA) and triethylamine (TEA), the collagen powder was added during the synthesis to modify the waterborne polyurethane. The collagen-based waterborne polyurethane was characterised via Fourier transform infrared spectroscopy (FT-1R) and size analysis, the results showed that the collagen was grafted onto the main chain of polyurethane, the emulsion had a.uniform particle size distribution, the average particle size was 70nm. The prepared emulsion was used in retanning, the application result showed that the collagen-based waterborne polyurethane retanning agent had a good affect for leather filling, especially in the belly. The shrinkage temperature, tensile strength and tear resistance were all raised. The retannage can also help to overcome the question of pastel shades. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Preparation of the collagen-based waterborne polyurethane - Characterisation of the collagen-based waterborne polyurethane - Retanning application test - Application of the retanning performance test
- RESULTS AND DISCUSSION : Characterization of the collagen-based waterborne polyurethane - Results of the retanning performanceEn ligne : https://drive.google.com/file/d/1USeTWqSt3jU5Yg0kQrC56td3qstf6SeB/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28800
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 3 (05-06/2017) . - p. 149-154[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19049 - Périodique Bibliothèque principale Documentaires Disponible Preparation and application of a high exhaustion chrome tanning auxiliary from limed fleshings / Hongjiao Liang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 3 (05-06/2023)
[article]
Titre : Preparation and application of a high exhaustion chrome tanning auxiliary from limed fleshings Type de document : texte imprimé Auteurs : Hongjiao Liang, Auteur ; Jun Zhao, Auteur ; Yulu Wang, Auteur ; Jin Liqiang, Auteur ; Zhang Feifei, Auteur Année de publication : 2023 Article en page(s) : p. 98-105 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Chaulage
Collagène
Cuirs et peaux -- Déchets -- Recyclage
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Propriétés thermiques
Cuirs et peaux de chèvres
Echarnage
Epuisement des tanins
Hydrolysats de protéines
Morphologie (matériaux)
Tannage au chromeIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The recycling of leather solid waste has become a key issue aimed at realising the sustainable development of the leather industry. Recently, more and more attention has been paid on the recycling of limed fleshings. In this paper, a new recycling method for limed fleshings is reported. First, collagen protein hydrolysate (CH) was obtained by hydrolysing limed fleshings under alkaline conditions, and then the CHwas modified with cyanuric chloride (TCT) to obtain a high exhaustion chrome auxiliary (HECA). The coordination of HECA with chromium salts was investigated by ultraviolet-visible (UV-Vis) spectrum. HECA was applied in the chrome tanning process as an additive. The chrome concentration in effluent, the shrinkage temperature and mechanical properties of the resultant wet-blue were determined. Thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to analyse the properties of the obtained leather. The results show that HECA could coordinate with chromium salts and significantly improved the absorption and fixation of chrome salt into leather. When the amount of chrome tanning agent was 5% and the amount of HECA was 3%, the uptake of chrome tanning agent could be increased to 92.42%, the shrinkage temperature (Ts) of wet-blue leather could reach 102.8°C, the relative increases being 27.26% and 7.3°C, respectively, compared with the conventional tanning process. The obtained wet-blue leather demonstrated uniform grain, good fullness and improved mechanical properties. This recycling method provides a valuable insight of developing high exhaustion chrome tanning aid from limed fleshings, and consequently increases the economic and environmental benefits in leather production. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Preparation of collagen protein hydrolysate (CH) - Preparation of high exhaustion chrome auxiliary (HECA) - Coordination of HECA with chromium salt - Application of HECA in tanning process - Characterisation
- RESULTS AND DISCUSSIONS : Physicochemical index of CH - Characterisation of HECA - Coordination of HECA with chromium salt - Ts and chrome uptake rate - Thermal properties and morphology of the leather - XRD analysis of wet-blue leather - Mechanical properties of leather samples
- Table 1 : Tanning process of pickled goat pelts
- Table 2 : Basic characteristics of CH
- Table 3 : Mechanical properties of leather samplesEn ligne : https://drive.google.com/file/d/1DMihbpPPdVi8PEOBB1qi5aQ0eQbtKieW/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39580
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 3 (05-06/2023) . - p. 98-105[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24110 - Périodique Bibliothèque principale Documentaires Disponible Preparation and characterization of collagen grafted by styrene-butyl acrylate and its application for paper sizing / Sufeng Zhang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 12 (12/2014)
[article]
Titre : Preparation and characterization of collagen grafted by styrene-butyl acrylate and its application for paper sizing Type de document : texte imprimé Auteurs : Sufeng Zhang, Auteur ; Qun Wang, Auteur ; Wanwan Dou, Auteur ; Wang Xuechuan, Auteur ; Qiang Taotao, Auteur Année de publication : 2014 Article en page(s) : p. 404-410 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Collagène
Copolymère styrène acrylate de butyle
Déchets industriels -- Recyclage
Encollage
Greffage (chimie)
Papier
Tannage -- DéchetsIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Collagen extracted from tannery wastes was modified by grafting it with molecular chains formed by polymerizing vinyl and acrylate monomers. The novel collagen product obtained in this manner was tested as paper sizing agent. The structure and properties of modified collagen were characterized by FTIR, STA and XRD. Results indicate that polyvinyl chains were grafted onto collagen, primarily in its crystalline regions. This modification significantly improved the thermal stability of collagen. Then the modified collagen emulsion alone (MCE), or combined either with gelatinized starch (MCE+S) or commercially produced styrene-acrylic emulsion (MCE+SAE), was applied to the surface of corrugating medium. The properties of these products were compared with those of commercially produced medium sized by SAE+S. Sizing by (MCE+S) increased the ring crush index by 12.7% and tensile index by 13.4%. In a Cobb60 test the corrugating medium sized by a blend of modified collagen and styrene acrylic emulsion (MCE+SAE) absorbed less water than commercially produced medium sized by SAE+S. Note de contenu : - Characterization of modified collagen sizing agent
- The sizing properties of modified collagen
En ligne : https://drive.google.com/file/d/1RiMCTbSZlYWnuBvVJIxJWfzJBMaXdwuo/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22497
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Code-barres Cote Support Localisation Section Disponibilité 16713 - Périodique Bibliothèque principale Documentaires Disponible Preparation and characterization of collagen-tio2 nanocomposite improved by glutaraldehyde / Zhou Nan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 5 (09-10/2006)
[article]
Titre : Preparation and characterization of collagen-tio2 nanocomposite improved by glutaraldehyde Type de document : texte imprimé Auteurs : Zhou Nan, Auteur ; Wuyong Chen, Auteur ; Li Shengli, Auteur ; Gu Haibin, Auteur ; Lin Yunzhou, Auteur ; Jia Lirong, Auteur Année de publication : 2006 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens
Caractérisation
Collagène
Cuirs et peaux -- Propriétés mécaniques
Dioxyde de titane
Glutaraldéhyde
Matériaux hybrides
Nanoparticules
pH
Stabilité hydrothermaleIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Previous work from this laboratory has demonstrated that a collagen-TiO2 nanocomposite could be prepared via a sol-gel procedure. However, the shrinkage temperature produced by this kind of nanocomposite is low. In this experiment, the collagen-TiO2 nanocomposite was improved by adding glutaraldehyde and increasing the pH level. Results show that the optimum amount of glutaraldehyde is 6% (based on pickled pelt weight), and the optimal pH level for preparation is 3.5. These conditions raise the shrinkage temperature of the nanocomposite from 73.8°C to 82.2°C.
Scanning Electron Micrographs (SEM) images indicate that the collagen fibril has been wrapped with nanoparticles. Meanwhile, results from Atomic Force Microscopy (AFM) suggest that nano-TiO2 with a particle size of 40nm can be formed in-situ in the collagen. Further experiments demonstrated that the introduction of nanoparticles endows the nanocomposite with antibacterial activity.Note de contenu : - EXPERIMENTAL PROCEDURES : Preparation of nano-TiO2 precursor solution - Preparation of collagen - Preparation of collagen-TiO2 nanocomposite - Determination of hydrothermal stability and mechanical properties - SEM and AFM analyses - Determination of antibacterial ability
- RESULTS AND DISCUSSION : Effect of glutaraldehyde on hydrothermal stability of nanocomposite - Effect of pH on hydrothermal stability of nanocomposite
- PERFORMANCE ANALYSIS OF NANOCOMPOSITE : Hydrothermal stability and mechanical properties - Scanning Electron Micrographs (SEM) Analysis - Atomic Force Microscope (AFM) Analysis - Antibacterial Activity
- Table 1 : Hydrothermal stability and mechanical properties
- Table 2 : The diameters of mould inhibition zones of samples (mm)En ligne : https://drive.google.com/file/d/1YMkuoB2rPmy6utuVddKuLwqEC_MsuvsT/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39056
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 90, N° 5 (09-10/2006)[article]Preparation and characterization of modified protein retanning agent based on leather waste / Wang Xuechuan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 3 (05-06/2016)
[article]
Titre : Preparation and characterization of modified protein retanning agent based on leather waste Type de document : texte imprimé Auteurs : Wang Xuechuan, Auteur ; Zhang Ting, Auteur ; Ren Longfang, Auteur ; Qiang Taotao, Auteur Année de publication : 2016 Article en page(s) : p. 136-141 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acrylate de butyle
Agents de tannage
Caractérisation
Collagène
Cuirs et peaux -- Déchets -- Recyclage
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de chèvres
Greffage (chimie)
Retannage
StyrèneIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Collagen extracted from leather wastes was used as the main raw material, a modified protein retanning agent was prepared by free radical polymerization reaction with butyl acrylate and styrene. The product was characterized by FT-IR, TEM, particle size analysis and other methods. The retanning properties were studied on goat garment leather. The results showed that grafting took place between collagen and the non-ionic monomers. The grafting rate was about 65%. The latex particles of the modified collagen cross-linking emulsion were spherical and uniform, the average particle size was about 117nm. The resistances of the product to electrolyte, acid and alkali were good. The thickening rate [substance increase] of the leather was about 10% when using the retanning agent. The leather has good resistance to wet and dry rubbing after retanning, the fixing effect was remarkable. The shrinkage temperature was up to 122°C. Compared with similar commercial retanning agents, the tensile strength and tearing strength of leather retanned by the self-prepared retanning agent increased by 28.5% and 37.8%, respectively. Note de contenu : - EXPERIMENTAL PROCEDURES : Reagents and apparatus - Preparation of modified collagen retanning agent - Characterization - The application of collagen retanning agent on leather
- RESULTS AND DISCUSSION : Characterization of modified collagen retanning agent - The application of collagen retanning agent in leatherEn ligne : https://drive.google.com/file/d/1flVupBNcHccMn5FrnO29d9kywrKG8Yky/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26447
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Code-barres Cote Support Localisation Section Disponibilité 18140 - Périodique Bibliothèque principale Documentaires Disponible Preparation and drug-released properties of electrospun core-shell nanofibers / Guo Huiwen in CHEMICAL FIBERS INTERNATIONAL, Vol. 66, N° 4 (12/2016)
PermalinkPreparation and drug-released properties of electrospun core-shell nanofibers / Guo Huiwen in CHEMICAL FIBERS INTERNATIONAL, (10/2017)
PermalinkPreparation of oxidised polyvinyl alcohol using hydrogen peroxide and its application for collagen modification / Baohua Liu in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 1 (01-02/2019)
PermalinkPrévention des vergetures par application topique. Un essai pratique à l'insu de patient et du médecin / J. Mallol in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 13, N° 1 (02/1991)
PermalinkProcter memorial lecture collagen, 1891-1977 : retrospect and prospect / Alan Gordon Ward in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 62, N° 1 (01-02/1978)
PermalinkProcter memorial lecture collagen, 1891-1977 : retrospect and prospect / Alan Gordon Ward in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 62, N° 1 (01-02/1978)
PermalinkProcter memorial lecture collager, 1891-1977 : retrospect and prospect / Alan Gordon Ward in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)
PermalinkProgress of application and chemical modification of biomass collagen : a review / Wang Xuechuan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 5 (09-10/2015)
PermalinkProtective and restorative effects of a Commiphora mukul gum resin and triheptanoin preparation on the CCL-110 skin fibroblast cell line / Cheppail Ramachandran in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 34, N° 2 (04/2012)
PermalinkProtein and leather charge / J. Guthrie-Strachan in WORLD LEATHER, Vol. 18, N° 8 (12/2005 - 01/2006)
PermalinkRaw skin wastes - Used to prepare a collagen fibre adsorbent for the chromatographic separation of flavonoids / Zhang Qixian in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 3 (05-06/2014)
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)
PermalinkReaction mechanism of tetrakis hydroxymethyl phosphonium with collagen protein / Li Ya in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 5 (09-10/2006)
PermalinkRéactivité de la fraction acido-soluble du collagène et comportement dans les mélanges eau-solvant organique / Daniel Herbage / 1970
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