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Effects of PAA on the different scales of leather structure / Zou Xianglong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 5 (09-10/2018)
[article]
Titre : Effects of PAA on the different scales of leather structure Type de document : texte imprimé Auteurs : Zou Xianglong, Auteur ; Chai Yuye, Auteur ; Lan Yunjun ; Li Zhongyu Année de publication : 2018 Article en page(s) : p. 251-253 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acide polyacrylique
Cuir -- Séchage
Fibrilles de collagèneLa fibrille de collagène est une structure constituée d'un assemblage de fibres de tropocollagène (assemblage de 3 protéines de collagène alpha (alpha 1 - alpha 1 - alpha 2) en une hélice droite.
RetannageIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this article, the topology of fibrils and the aggregate structure of leather fibres were characterised by TEM and SEM to reveal the effects of PAA on the different scale of the structure of leather. The results show that PAA has little influence on the collagen molecules array and collagen fibres aggregate structure in the wet state. But, during air-drying PAA observably influences the collagen fibres aggregate structure. After being PAA retanned, the air-dried leather fibres become thinner and the space between fibres increases. Note de contenu : - MATERIALS AND METHODS
- RESULTS AND DISCUSSION : Effect of PAA on the array of collagen molecules - Effect of PAA on the array of collagen fibres
- Fig. 1 : TEM images of collagen fibrils ; no retanning and PAA retanning
- Fig. 2 : SEM images of freeze drying collagen fibres : no retanning and PAA retanning
- Fig. 3 : SEM images of air drying collagen fibres : no retanning and PAA retanningEn ligne : https://drive.google.com/file/d/1QZzoJ4QwM2kSxzcDjTnZOzrUmZTcUiJ1/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31110
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 102, N° 5 (09-10/2018) . - p. 251-253[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20281 - Périodique Bibliothèque principale Documentaires Disponible Effects of polyacrylic acid on the structure of collagen fibre / Zou Xianglong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 4 (07-08/2014)
[article]
Titre : Effects of polyacrylic acid on the structure of collagen fibre Type de document : texte imprimé Auteurs : Zou Xianglong, Auteur ; Lan Yunjun, Auteur ; Zhang Qinghua, Auteur ; Li Zhongyu, Auteur ; Zhang Xiaoli, Auteur Année de publication : 2014 Article en page(s) : p. 172-176 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acide polyacrylique
Analyse thermique
Collagène
Cuirs et peaux de moutons
Diffractométrie de rayons X
Microscopie électronique à balayage
Microscopie électronique en transmissionIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The effects of polyacrylic acid (PAA) on the hierarchical structure of sheepskin collagen fibres were investigated by using of transmission electron microscope (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD) and differential scanning calorimetry (DSC). It was found that although the unique axial periodic (d periodicity) structure of collagen fibrils and orderly arrangement of collagen molecule did not change obviously alter the introduction of PAA, the aggregation behaviour of collagen fibres was greatly influenced. With increasing concentration of PAA, the order of intermolecular lateral packing decreased, the shrinkage of the leather lessened [from changes in surface morphology observed by SEM] and the dry heat stability of collagen fibre declined due to a decrease in the orderly degree of collagen fibre aggregation. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of PAA - Experimental procedure and characterization
- RESULTS AND DISCUSSION : TEM - SEM - XRD - DSCEn ligne : https://drive.google.com/file/d/1Kql2Xrhdh5La-mewKh0DfUdKNDtREK84/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21818
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 4 (07-08/2014) . - p. 172-176[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16445 - Périodique Bibliothèque principale Documentaires Disponible Influences of drying methods on the thermal stability of leather / Ren Bianli in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 1 (01-02/2020)
[article]
Titre : Influences of drying methods on the thermal stability of leather Type de document : texte imprimé Auteurs : Ren Bianli, Auteur ; Fang Qi, Auteur ; Chai Yuye, Auteur ; Xu Xiaohong, Auteur ; Zou Xianglong, Auteur Année de publication : 2020 Article en page(s) : p. 44-46 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuir -- Séchage
Cuirs et peaux -- Analyse
Stabilité thermiqueIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The influences of drying methods on the thermal stability of leather were investigated. The results show that drying methods have an obvious effect on the water content and hydrogen bonds between collagen fibres. The water content of leather after freeze drying is less than that after air drying. The collagen fibres after air drying combine more tightly than after freeze drying. Concerning stronger hydrogen bonds between collagen fibres, the thermal stability of air-dried leather is better than that of freeze-dried leather. Note de contenu : - MATERIALS AND METHODS : Materials - Method
- RESULTS AND DISCUSSION : Influence of drying methods on the structure of leather - Area shrinkage rate - Tg analysisEn ligne : https://drive.google.com/file/d/1Ve8G1wo5hlEuQ99-DNrpf6iV1EsHy7tn/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33543
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 104, N° 1 (01-02/2020) . - p. 44-46[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21508 - Périodique Bibliothèque principale Documentaires Disponible Retanning mechanism of polyacrylic acid from the point of fibre motion / Zou Xianglong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 6 (11-12/2019)
[article]
Titre : Retanning mechanism of polyacrylic acid from the point of fibre motion Type de document : texte imprimé Auteurs : Zou Xianglong, Auteur ; Fang Qi, Auteur ; Ren Bianli, Auteur ; Chai Yuye, Auteur ; Li Zhongyu, Auteur Année de publication : 2019 Article en page(s) : p. 311-313 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acide polyacrylique
Cuirs et peaux -- Analyse
Retannage
Tannage organiqueIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The retanning mechanism of PAA was studied from the point of fibre motion. The stress state of collagen fibres retanned with PAA was analysed and the structure of retanned leather was characterised by SEM and strain-stress analysis. The results show that PAA mainly interacts with collagen fibres by adhesive force (AF) between collagen fibres and capillary flow. As PAA dosage increases, AF increases and the collagen fibre's array becomes more disordered. Note de contenu : - Change of stress state of collagenfibres after being retanned with PAA
- Effect of PAA on the array of collagen fibresEn ligne : https://drive.google.com/file/d/1-Nkf0khxkAo_U7Bmaac-UvAgy90pavNl/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33208
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 6 (11-12/2019) . - p. 311-313[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21314 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and mechanical properties of polyacrylic acid resin retanning agent / Zou Xianglong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 3 (05-06/2014)
[article]
Titre : Synthesis and mechanical properties of polyacrylic acid resin retanning agent Type de document : texte imprimé Auteurs : Zou Xianglong, Auteur ; Lan Yunjun, Auteur ; Zhang Qinghua, Auteur ; Zhan Xiaoli, Auteur Année de publication : 2014 Article en page(s) : p. 127-130 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acide polyacrylique
Analyse mécanique dynamique
Caractérisation
Humidité -- Absorption
Polymères -- Synthèse
RetannageIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Polyacrylic acid retanning agent (PAA), PAA-1 and PAA-2 with weight average molecular weights (Mw) of 14.4 x 103 and 23.1 x 103g/mol respectively, were prepared by water solution homopolymerization of acrylic acid monomer. The effects of molecular weight and moisture absorbency on glass transition temperature (T) and mechanical properties of PAA were investigated. The results showed that PAA-1 and PAA-2 have similar capacity for moisture absorbency, namely about 14.5% at 20°C(T=20°C) and 65% relative humidity (RH=65%). After equilibrating for 48 hours at T=20°C, RH=65%, the T of PAA-1 and PAA-2 fell from 86.17°C and 90.71°C to -11.44°C and -3.09°C respectively. Dynamic mechanical analysis (DMA) showed the storage moduli of PAA-1 and PAA-2 were significantly decreased at -26.99°C and -8.78°C respectively, the storage modulus of PAA-2 was higher than that of PAA-1 due to its higher molecular weight. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of PAA - Experimental procedure and characterization
- RESULTS AND DISCUSSION : FT-IR analysis - Moisture absorption of PAA - DMAEn ligne : https://drive.google.com/file/d/1o6rYJ3cgN9-nNdNj-T2EIrXpE4U7QbBG/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21533
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 3 (05-06/2014) . - p. 127-130[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16323 - Périodique Bibliothèque principale Documentaires Disponible Tanning properties of 4-((4,6-dichloro-1,3,5-triazin-2-yl) amino) benzene sulfonic acid / Zou Xianglong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 5 (09-10/2019)
PermalinkThe relationship between the organoleptic properties of leather and the aggregate structure of collagen fibres / Ren Bianli in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 6 (11-12/2018)
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