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]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 102, N° 5 (09-10/2018) . - p. 251-253 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 collagène La 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. Retannage Index. 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 retanning En ligne : https://drive.google.com/file/d/1QZzoJ4QwM2kSxzcDjTnZOzrUmZTcUiJ1/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31110 [article]

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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]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 4 (07-08/2014) . - p. 172-176 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 transmission Index. 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 - DSC En ligne : https://drive.google.com/file/d/1Kql2Xrhdh5La-mewKh0DfUdKNDtREK84/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21818 [article]

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Polyaniline/g-C3N4 composites as novel media for anticorrosion coatings / Shixiang Zuo in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 6 (11/2017)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 6 (11/2017) . - p. 1307-1314 Titre : Polyaniline/g-C3N4 composites as novel media for anticorrosion coatings Type de document : texte imprimé Auteurs : Shixiang Zuo, Auteur ; Yao Chen, Auteur ; Wenjie Liu, Auteur ; Chao Yao, Auteur ; Yingruo Li, Auteur ; Jiangquan Ma, Auteur ; Yong Kong, Auteur ; Huihui Mao, Auteur ; Li Zhongyu, Auteur ; Yongsheng Fu, Auteur Année de publication : 2017 Article en page(s) : p. 1307-1314 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs Anticorrosion Electrochimie Exfoliation Nitrure de carbone graphitique Polyaniline Index. décimale : 667.9 Revêtements et enduits Résumé : In this paper, graphitic carbon nitride (g-C3N4) was first proposed for the pioneer application of anticorrosion coatings. Original g-C3N4 was facilely treated using HNO3 and the exfoliated g-C3N4 sheets (E-g-C3N4) were fabricated, and then, polyaniline/E-g-C3N4 composites (PANI/E-g-C3N4) as novel anticorrosive media were synthesized by chemical oxidative polymerization and devoted to the corrosion protection of coatings. The E-g-C3N4 sheets and PANI/E-g-C3N4 composites were characterized by X-ray diffraction, Fourier transform infrared, thermogravimetric analysis, and transmission electron microscopy. The anticorrosion properties of the samples prepared were investigated by electrochemical measurements including Tafel plots, electrochemical impedance spectra, and open-circuit potential. Accelerated corrosion tests of iron panels coated by PANI/E-g-C3N4 were performed in 3.5 wt% NaCl solution. Anticorrosive mechanism of PANI/E-g-C3N4 was discussed in detail. PANI/E-g-C3N4-3 fillers possessed superior corrosion inhibition than individual components on iron coatings, which was due to the synergetic effect of anticorrosion between E-g-C3N4 and PANI. Note de contenu : - EXPERIMENTAL : Preparation of PANI/E-g-C3N4 composites - Preparation of anticorrosion coatings - Characterization methods - Evaluation of anticorrosion performance - RESULTS AND DISCUSSION : Structures characterization - Morphologies characterization - Corrosion studies DOI : 10.1007/s11998-017-9916-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9916-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29635 [article]

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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]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 6 (11-12/2019) . - p. 311-313 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 organique Index. 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 fibres En ligne : https://drive.google.com/file/d/1-Nkf0khxkAo_U7Bmaac-UvAgy90pavNl/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33208 [article]

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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)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 5 (09-10/2019) . - p. 268-271 Titre : Tanning properties of 4-((4,6-dichloro-1,3,5-triazin-2-yl) amino) benzene sulfonic acid Type de document : texte imprimé Auteurs : Zou Xianglong, Auteur ; Fang Qi, Auteur ; Chai Yuye, Auteur ; Li Zhongyu, Auteur ; Ren Bianli, Auteur Année de publication : 2019 Article en page(s) : p. 268-271 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage Caractérisation Composés organiques -- Synthèse Cuir -- Stabilité Tannage organique Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In this work, a triazine tanning agent of 4-((4,6-dichloro-1,3,5-triazin-2-yl)amino) benzenesulfonic acid (SAT) was prepared with cyanuric chloride and sodium p-aminobenzene sulfonate, its structure was confirmed by FTIR spectroscopy, and its tanning property was investigated. The results indicate that SAT can raise the Ts of tanned skin to around 75°C at the optimised dosage of 3%. The stability of tanned leather was tested by washing with aqueous solution of 10w% urea, lOw% NaCI and 14 acetone. The results of washing show that the tanned leather of SAT has excellent stability and there are stable covalent bond interactions between SAT and collagen fibres. Based on the results of washing and the structure characteristics of SAT, a tanning mechanism of SAT was given in which the second Cl and the third CI on the triazine ring can both react with collagen fibres under mild tanning conditions of 35°C to 45°C. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of SAT - Instrumentation - Tanning procedure - Test of stability of tanned leather - RESULTS AND DISCUSSION : Structure characterisation of SAT - Effect of tanning temperature on Ts - Tanning stability of SAT En ligne : https://drive.google.com/file/d/1lkLeE9lnQ3jOM8SfxH_y2V9d5wZryfo9/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33002 [article]

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