Determination of dimethyl fumarate in leather : purge-assisted headspace solid-phase microextraction coupled with GC-MS / Li Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 4 (07-08/2012)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 96, N° 4 (07-08/2012) . - p. 148-151 Titre : Determination of dimethyl fumarate in leather : purge-assisted headspace solid-phase microextraction coupled with GC-MS Type de document : texte imprimé Auteurs : Li Wang, Auteur ; Qian Shu, Auteur ; Zhang Yu, Auteur ; Chen Shujuan, Auteur ; Zhang Xinshen, Auteur Année de publication : 2012 Article en page(s) : p. 148-151 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Analyse Extraction par solvant Fumarate de diméthyle Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Purge-assisted headspace solid-phase micro-extraction (PA/HS-SPME) was proposed for the determination of dimethyl fumarate (DMF) extracted from finished leather. Samples were extracted from solvent by Accelerated Solvent Extractor (ASE), concentrated and purified with PA/HS-SPME, analyzed by gas chromatography-mass-spectrometry (GC-MS), and quantified against external standards. The parameters of PA/HS-SPME, such as temperature and time, were studied. Under the optimal conditions, the linearity for DMF was over the concentration range of 5-1000ng/ml ; the detection limit was 1ng/ml ; the relative standard deviation (n=6) was 9.94 % at 100ng/ml. The recoveries were in the range of 66.8-91.5 %. This eco-friendly method was applied to the determination of DMF in leather samples satisfactorily. The proposed PA/HS-SPME method opens new avenues for the determination of DMF in leather samples. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Instrumentation - Extraction of DMF from leather samples and sample preparation - Operating procedure - RESULTS AND DISCUSSION : Optimization of PA/HS-SPME conditions - Limits of detection, linear range and precision - Analysis or real samples En ligne : https://drive.google.com/file/d/1eaoKLIvuJdArwL4gDuSV_XOerDlgYUIA/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15699 [article]

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Flow injection spectrophotometric determination of chromium(VI) extracted from dyed leather with on-line decolouring / Li Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 4 (07-08/2012)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 96, N° 4 (07-08/2012) . - p. 152-156 Titre : Flow injection spectrophotometric determination of chromium(VI) extracted from dyed leather with on-line decolouring Type de document : texte imprimé Auteurs : Li Wang, Auteur ; Zhang Xinshen, Auteur ; Qian Shu, Auteur ; Zhang Yu, Auteur ; Chen Shujuan, Auteur Année de publication : 2012 Article en page(s) : p. 152-156 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuir -- Teneur en chrome hexavalent Cuir teint Cuirs et peaux -- Analyse Spectrophotométrie Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The on-line decolouring reverse reference flow injection analysis (r-FIA) was proposed to determine chromium(VI) extracted from dyed leather by phosphate buffer. A decolouring column and time switch controller was introduced in r-FIA. Under the optimal conditions, the linear range of this method was 2-50µg/l ; the detection limit was 0.94µg/l ; the relative standard deviation (n=11) for 20µg/l chromium(VI) was 0.88 %. Using a dyed leather sample, the corresponding linear range of this method was 0.5-12.5mg/kg. The method not only effectively removes the colour interference but also is also rapid, reliable, saves time and effort and is convenient. This method was suitable for automatic and continuous analysis with satisfactory result. The method represents 'green' analytical chemistry for Cr(VI) in dyed leather samples. Note de contenu : - EXPERIMENTAL PROCEDURES : Reagents - Preparation of solutions - Instrumentation - Analytical procedure - The work conditions of on-line decolouring reverse reference flow injection analysis (r-FIA) - Decolouration by DJ, PA and Florisil column - Extraction of Cr(VI) from leather samples and sample preparation En ligne : https://drive.google.com/file/d/19jTpke5i8cKyMcKf9e9mxHrm6lzrkZSf/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15700 [article]

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Identification of fur species by DNA barcoding based on 16S rRNA gene / Fangfang Qin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 6 (11-12/2016)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 100, N° 6 (11-12/2016) . - p. 298-303 Titre : Identification of fur species by DNA barcoding based on 16S rRNA gene Type de document : texte imprimé Auteurs : Fangfang Qin, Auteur ; Sun Shiyu, Auteur ; Zongliang Chen, Auteur ; Yuluan Wu, Auteur ; Delian Wang, Auteur ; Yanping Xian, Auteur ; Hao Dong, Auteur ; Bin Wang, Auteur ; Li Wang, Auteur Année de publication : 2016 Article en page(s) : p. 298-303 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : ADN Extraction (chimie) Fourrures -- Identification Marqueurs génétiques Réaction en chaîne par polymérase Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Traditional identification of fur species is a problem ; without unified standards il depends significantly on the experience of the tester. In this study, we cleveloped a.method of identification of fur species by DNA barcoding based on 16S rRNA gene. 18 usuel fur species sequences of 165 rRNA gene were obtained from Genebank and primers for PCR were designed in the conserved ragions. By the optimization of experimental procedure, polymerase chain reaction (PC R) can be successfully performed with DNA isolated from fur. Sequence analyses of the -240bp production of PCR could help us to authenticate the fur species accurately. Note de contenu : - Reference materials and samples - DNA extraction - Primer designing - PCR and DNA sequencing En ligne : https://drive.google.com/file/d/1oHUj5KyzEZUcgu-BSqYngLtKVARJqchd/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27665 [article]

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Mechanically enhanced self-stratified acrylic/silicone antifouling coatings / Jingjing Xue in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 212, N° 4674 (04/2022)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 212, N° 4674 (04/2022) . - p. 27-31 Titre : Mechanically enhanced self-stratified acrylic/silicone antifouling coatings Type de document : texte imprimé Auteurs : Jingjing Xue, Auteur ; Li Wang, Auteur ; Yong Fan, Auteur ; Jianing Xu, Auteur ; Jie Zhao, Auteur ; Limei Tian, Auteur ; Wenbo Du, Auteur Année de publication : 2022 Article en page(s) : p. 27-31 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Copolymère silicone acrylique Essais d'adhésion Polydiméthylsiloxane Le polydiméthylsiloxane —[O-Si(CH3)2]n—, ou poly(diméthylsiloxane) selon la nomenclature systématique, communément appelé PDMS ou diméthicone, est un polymère organominéral de la famille des siloxanes souvent présent dans les shampoings. On l'y ajoute pour augmenter le volume des cheveux mais il peut également aller boucher les pores du cuir chevelu et rendre les cheveux gras. C'est une des raisons pour lesquelles se laver les cheveux tous les jours est très déconseillé avec un shampooing contenant des silicones. Il existe également de l'amodiméthicone, qui est un dérivé du diméthicone. Le polydiméthylsiloxane est un additif alimentaire (E900), utilisé comme antimoussant dans les boissons (Coca-Cola BlāK). La chaîne de poly(diméthylsiloxane) forme également la structure de base des huiles et des caoutchoucs silicones. Résistance à l'abrasion Revêtements antisalissures Revêtements autostratifiants Index. décimale : 667.9 Revêtements et enduits Résumé : Great attention has been paid to silicone-based fouling-release coatings (FRCs) in the realm of maritime antifouling due to their highly efficient and eco-friendly properties, but many challenges remain for developing a silicone-based FRC that improves its adhesion performance without reducing the antifouling property. Herein, a non-toxic silicone-based FRC has been developed by integrating acrylic resin (AR) with a silicone resin (PDMS) to spontaneously form a self-stratified AR/PDMS coating. The AR/PDMS antifouling coating stil) has the same fouling-release performance but improved adhesion strength (from 0.4 to 2.0 MPa) in comparison with pristine PDMS. Moreover, the antifouling coating has proven to be extremely stable in different environments (such as pH, heating, and ultraviolet exposure). The study provides a facile and convenient self-stratified strategy to develop antifouling coatings, contributing to environmentally friendly coatings in marine applications. Note de contenu : - MATERIALS AND METHODS : Materials - Stratified coating preparation - Adhesion force tests - Coating stability test - Mimetic measurement of barnacle adhesions strength - Antibacterial adhesion test - Other characterisation - RESULTS AND DISCUSSION : Characterisation of acrylic/silicone coating - Self-stratification acrylic/silicone coating - Coating adhesion of AR-PDMS coatings - Coating stability and abrasion resistance - Antifouling property - Antibacterial adhesion performance - Mimetic measurement of barnacle removal strength En ligne : https://drive.google.com/file/d/1GIVhv-kFk0iGIfuj_mxeBkFio2QNARkN/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37391 [article]

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Preparation and stability of aqueous acrylic polyol dispersions for two-component waterborne polyurethane / Li Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 1 (01/2017)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 1 (01/2017) . - p. 215-223 Titre : Preparation and stability of aqueous acrylic polyol dispersions for two-component waterborne polyurethane Type de document : texte imprimé Auteurs : Li Wang, Auteur ; Fei Xu, Auteur ; Hongxin Li, Auteur ; Yangyan Liu, Auteur ; Yali Liu, Auteur Année de publication : 2017 Article en page(s) : p. 215-223 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Polyacryliques Polyols Polyuréthanes Revêtements bi-composant:Peinture bi-composant Index. décimale : 667.9 Revêtements et enduits Résumé : In this study, aqueous acrylic polyol dispersions with high stability for a two-component waterborne polyurethane were prepared. To improve the stability of acrylic dispersions, the influence of the acrylic acid (AA) addition method, neutralization, water addition rate during the dilution process, and dispersion equipment on the stability of the aqueous acrylic polyol dispersion was studied using dynamic light scattering and a thermal storage experiment. The acrylic resins’ structure was examined using Fourier transform infrared spectra, and the water resistance of the resultant films was investigated by electrochemical measurements and a water-swelling experiment. The dispersions prepared by two-step AA addition exhibited better particle size distribution, viscosity, and thermal storage compared with those prepared by one-step AA addition. Furthermore, the acrylic resin prepared by two-step AA addition was observed to possess a higher acid value. The corrosion currents of films based on dispersions prepared by two-step AA addition decreased to a smaller extent after 24 h of immersion in water. The dispersions afforded smaller particles when larger amounts of neutralizer and slower water addition rates were used. The dispersions prepared using a sawtooth disk dispersion machine displayed better performance than that prepared using a homogenizer dispersion machine. Note de contenu : - EXPERIMENTAL : Materials - Preparation of acrylic resin - Preparation of the aqueous acrylic dispersion - Preparation of coating films - CHARACTERIZATION : Fourier transform infrared (FTIR) spectroscopy - Acid value - Viscosity - dispersion size - Dispersion solid content - Zeta potential measurement - Electrochemical measurements - Water-swelling measurement RESULTS AND DISCUSSION : Effect of neutralization on stability - Effect of means of AA addition on stability - Effect of water addition rate on stability - Effect of dispersion equipment on stability - Effect of dilution En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9845-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27803 [article]

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Recent progress in synthesis of antifogging agents and their application to agricultural films : a review / Sicong Ren in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 3 (05/2018)  

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Research status and development trend of 3D printing binders / Yuying Song in MATERIAUX & TECHNIQUES, Vol. 111, N° 1 (2023)  

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Reverse reference flow injection spectrophotometry for the determination of chromium(VI) extracted from leather by artificial perspiration / Li Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 6 (11-12/2010)  

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Silica-embedded polyurea microspheres with rough surface for matte leather finishing / Liang Jia in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 5 (05/2022)  

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Thermodynamic investigations on chrome and aluminum tanning / Li Wang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 11 (11/2017)  

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