Adsorption properties of acid dye on amine-terminated dendritic polymer / Qiang Taotao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 3 (05-06/2017)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 3 (05-06/2017) . - p. 112-122 Titre : Adsorption properties of acid dye on amine-terminated dendritic polymer Type de document : texte imprimé Auteurs : Qiang Taotao, Auteur ; Zhao Jing, Auteur ; Bu Qiaoqiao, Auteur ; Ren Longfang, Auteur Année de publication : 2017 Article en page(s) : p. 112-122 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants Colorants -- Adsorption Colorants acides Eaux usées -- Epuration Polymères -- Synthèse Polymères à terminaison amine Polymères dendritiques Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A series of amine-terminated dendritic polymers (ADPs) were synthesized by stepwise substitution reaction and were used as an adsorbent for removal of acid black dye NT from aqueous solution. Comparison experiments showed that the ADP-3 has good adsorption effect. Then, the effects of various parameters such as initial acid black dye NT concentration (50-300mg/L) and solution pH(1.5- 6.5) were investigated. The point of zero charge (PZC) of ADP-3 has been determined. Specific surface area and average adsorption pore size of the ADP-3 were 21.378m2/g and 3.833nm, respectively. Field scanning electron microscopy (FESEM) indicated that the adsorption material has porous structure, which provided favorable conditions for adsorption process. The experimental data were analyzed by Langmuir and Freundlich models of adsorption. Equilibrium data were fitted well with the Freundlich model. Thermodynamics parameters, ?G, ?H and ?S indicate that the adsorption of acid black dye NT onto ADPs were spontaneous and endothermic process in nature. Pseudo-first-order and pseudo-second-order kinetic models vvere used to fit the adsorption kinetic data. The adsorption kinetics was found to follow the pseudo-first-order kinetic model. Amino blocking indicated that the amine content plays an important role in the adsorption process. The adsorbent was also applied to the treatment of leather dye effluent, the results showed that ADP-3 exhibit a prominent adsorption property on leather dye effluent. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials and instruments - Preparation of ADP - Contrast experiments - Characterisation of products - Adsorption experiments - Adsorption mechanism - Adsorption application in leather dye effluent - RESULTS AND DISCUSSION : Amino contents - Contrast experiments results - The point of zero charge (PZC) of ADP-3 - Instrument characterization - Adsorption experiment results - Adsorption kinetics - Adsorption mechanism - Adsorption application in leather dye effluent En ligne : https://drive.google.com/file/d/1Tixq7ruz2XOqaidv26cg77Xmq-D4t0cL/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28795 [article]

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Effect of hydrophilic chain extenders on properties of hyperbranched waterborne polyurethane / Wang Xuechuan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 2 (03-04/2016)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 100, N° 2 (03-04/2016) . - p. 62-66 Titre : Effect of hydrophilic chain extenders on properties of hyperbranched waterborne polyurethane Type de document : texte imprimé Auteurs : Wang Xuechuan, Auteur ; Ren Jing, Auteur ; Qiang Taotao, Auteur Année de publication : 2016 Article en page(s) : p. 62-66 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composés organiques -- Synthèse Cuirs et peaux -- Finition Diméthyl butanoïque, Acide Essais de résilience Essais dynamiques Mouillabilité Polymères -- Analyse Polymères -- Propriétés mécaniques Polymères en émulsion Polymères ramifiés Polyuréthanes Propionique diméthylol, Acide Résistance chimique Résistance thermique Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Using hydroxyl terminated hyperbranched polymer as the core, dimethylol propionic acid (DMPA), dimethylolbutanoic acid (DMBA), carboxylic acid type monomer (DMCA) as the hydrophilic chain extenders respectively, three different types of hyperbranched waterborne polyurethane leather finishing agents were synthesized. The structures and properties of the products were characterized by FT-IR, SEM, AFM and TG. Simultaneously, the mechanical properties, surface wettability and water and solvent resistance of three films were studied. The results found the order of crystallinity to be : DMBA-HWPU Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Sources - The synthesis of DMCA - The synthesis of hyperbranched waterborne polyurethane - RESULTS AND DISCUSSION : Fourier transforms infrared spectroscopy - X-ray diffraction - Scanning electron microscopy (SEM) - Atomic force microscope (AFM) - Emulsion particle size - Simultaneous thermal analysis curves - Physical and mechanical properties En ligne : https://drive.google.com/file/d/1GQlPV_HUIq7F-tUUWLvt_sE5TcVb2FzQ/view?usp=drive [...] Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26088 [article]

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Homogeneous Zr and Ti co-doped SBA-15 with high specific surface area : preparation, characterization and application / Qiang Taotao in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 1 (Année 2019)  

[article]  inJOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 1 (Année 2019) . - 12 p. Titre : Homogeneous Zr and Ti co-doped SBA-15 with high specific surface area : preparation, characterization and application Type de document : texte imprimé Auteurs : Qiang Taotao, Auteur ; Yajuan Xia, Auteur ; Zhao Jing, Auteur Année de publication : 2019 Article en page(s) : 12 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants Adsorption Caractérisation Chimie analytique Composés inorganiques -- Synthèse Santa Barbara Amorphous-15 Santa Barbara Amorphous-15 (SBA-15) is a highly stable mesoporous silica sieve developed by researchers at the University of California at Santa Barbara. It gets it high hydrothermal and mechanical stability from a framework of uniform hexagonal pores that feature a narrow pore-size distribution and a tunable pore diameter of 5nm to 15nm, but, most significantly, from its relatively thick walls, which range between 3.1nm and 6.4nm. SBA mesoporous silica 15 has a high internal surface area, which lends itself to various applications, including environmental adsorption and separation, advanced optics, and catalysts. (ACS Materials) Surfaces (technologie) Tannage Thermodynamique Titane Zirconium Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A facile synthesis procedure is proposed to prepare homogeneous Zr and Ti co-doped SBA-15 (Zr-Ti-SBA-15) with high specific surface area of 876.0 m2 g− 1. Based on “masking mechanism” from tanning, lactic acid was used as masking agent to obtain the uniform distribution of Zr and Ti species in the SBA-15 framework. The obtained materials were characterized by powder X-ray diffraction (XRD), nitrogen adsorption-desorption isotherms, scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray photoelectron (XPS). The results reveal that in mesoporous materials, the presence of lactic acid gives rise to the uniform distribution of Zr and Ti species. The adsorption equilibrium and kinetic studies of Zr-Ti-SBA-15 materials show that the adsorption process conforms to the Langmuir isotherm and pseudo-second-order kinetic model, respectively. Regenerational experiments show that the Zr-Ti-SBA-15 displays a significant adsorption ability for methylene blue (MB) (up to 291.6 mg/g), along with good reusability, indicating promising potentials of commercialization. Methodologically, this work provides a wide range of possibilities for further development of SBA-15 based on bimetallic and sewage disposal. Note de contenu : - EXPERIMENTAL SECTION : Materials - Preparation of Zr-Ti -SBA-15 - Characterization of Zr-Ti-SBA-15 - Adsorption measurement - Regeneration experiment - RESULTS AND DISCUSSION : XRD characterization - N2 adsorption-desorption - TEM and SEM characterization - EDS characterization - XPS characterization - Adsorption measurement of Zr-Ti-SBA-15 - Kinetic analysis - Adsorption isotherms - Thermodynamics analysis - Regeneration experiment of Zr-Ti-SBA-15 - Table 1 XRD texture properties of the samples - Table 2 Textural parameters of the samples - Table 3 The pseudo-first-order and pseudo-second-order kinetic model parameters for MB adsorption on Zr-Ti-SBA-15 composite - Table 4 Isothermal parameters for MB adsorption on Zr-Ti-SBA-15 composite - Table 5 Comparison of the maximum adsorption capacity of different adsorbents - Table 6 The values of thermodynamics parameters for MB adsorption on Zr-Ti-SBA-15 - Table 7 The leaching data of Zr and Ti during desorption process DOI : https://doi.org/10.1186/s42825-019-0004-x En ligne : https://link.springer.com/content/pdf/10.1186/s428 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36946 [article]

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Hyperbranched polymer polyols : their preparation, modification and use in the leather industry / Wang Xuechuan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 2 (03-04/2009)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 93, N° 2 (03-04/2009) . - p. 61-72 Titre : Hyperbranched polymer polyols : their preparation, modification and use in the leather industry Type de document : texte imprimé Auteurs : Wang Xuechuan, Auteur ; Yuan Xuzheng, Auteur ; Qiang Taotao, Auteur ; Ren Longfang, Auteur Année de publication : 2009 Article en page(s) : p. 61-72 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A series of hyperbranched (poly(amine-ester) polyols (HPAEPs) were synthesized by the polycondensation of N,N-diethylol-3-amine-methylpropionate [prepared by the Michael addition reaction of methyl acrylate (MA) with diethanolamine (DEA)] as an AB2-type monomer with trimethylol propane (TMP) as the core moiety, proceeding in one-step procedure in the melt with p-toluenesulfonic acid (p-TSA) as catalyst. Then, it was modified by diethyl malonate (DEM) in the presence of catalyst (anhydrous K2CO3) via transesterification to obtain a water-soluble hyperbranched polymer with active methylene (HPAM), which can be used as formaldehyde elimination agent. The obtained polymers were characterized by FTIR and TGA. the application results show that HPAEP can be used as the retanning agent with reinforcing performance (tear strength increased by 23.3 % and tensile strength increased by 11.3 %) and bleaching efect (whiteness value increase by 19.8 %) meanwhile. The removal efficiency of free-formaldehyde in leather could reach 56.25 % at 2 % dosage of HPAM for capturing 5h. En ligne : https://drive.google.com/file/d/12Z2LzH5ZpratMjYdV_Cs8EhKwA1PLKpP/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5094 [article]

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Leather retanning performance of carboxylated collagen fibres containing adsorbed Cr(III) / Qiang Taotao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 4 (07-08/2018)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 102, N° 4 (07-08/2018) . - p. 187-193 Titre : Leather retanning performance of carboxylated collagen fibres containing adsorbed Cr(III) Type de document : texte imprimé Auteurs : Qiang Taotao, Auteur ; Song Yunying, Auteur ; Bu Qiaoqiao ; Wang Xuechuan ; Li Ji ; Li Lu Année de publication : 2018 Article en page(s) : p. 187-193 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants Carboxylation Collagène Cuir -- Teneur en chrome trivalent Cuirs et peaux d'esturgeon Cuirs et peaux de moutons Cuirs et peaux de Poissons Extraction (chimie) Glyoxylique, Acide L'acide glyoxylique ou acide oxoacétique est un acide organique. Avec l'acide acétique, l'acide glycolique et l'acide oxalique, l'acide glyoxylique est l'un des acides carboxyliques en C2. C'est un solide incolore naturellement présent et il est utile industriellement. Hydrolysats de protéines Hydrolyse enzymatique Retannage Wet-blue (tannage) Peau tannée au chrome (le chrome donne une couleur bleue) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Carboxylated collagen fibre (CCF) was prepared using glyoxylic acid modified collagen fibre which was extracted from fresh pigskin, the prepared CCF was used as an adsorbent to treat trivalent chromium ions (Cr(III)) in wastewater (Cr-CCF). Alkali-enzyme hydrolysis was used to extract collagen protein from the CCF after the adsorption of Cr(III) to obtain chromium-containing collagen hydrolyzate (Cr-CCH). Fourier transform infrared spectroscopy (FTIR) and gel permeation chromatography (GPC) were employed to analyse the structure and relative molecular mass distribution of the collagen in Cr-CCH. The Cr(III) content was determined by diphenylcarbazide spectrophotometry. The optimal hydrolysis conditions were optimised by single factor experiments with the collagen extraction rate as the index. Finally, sheep and sturgeon wet-blue was chosen to evaluate the retanning efficiency of Cru-CCH. The satisfactory sensory and mechanical properties of the finished leather demonstrated that Cr-CCH could become a good candidate as a retanning agent, which not only satisfied performance requirements for finished leather, but also achieved recycling of resources. Note de contenu : - EXPERIMENTAL PROCEDURES : Material and apparatus - Preparation of CFF - Preparation of Cr-CCF - Alkali-enzyme hydrolysis of Cr-CCF - Characterization of Cr-CCH - Retanning performance of Cr-CCH - RESULTS AND DISCUSSION : The single factor effect of Cr-CCH - The characterization of hydrolysos performance - The retanning performance of Cr-CCH En ligne : https://drive.google.com/file/d/1-gpslAR_wnZbgfSQB-krSGQLXYwcPxJp/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30901 [article]

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Leather solid waste : a review. A low cost adsorption material based on collagen fibre / Qiang Taotao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 3 (05-06/2016)  

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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)  

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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)  

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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)  

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Progress 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)  

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Recycling of raw materials (collagen protein) in the leather industry -high value added application of leather solid waste / Li Chengtao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 5 (09-10/2017)  

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Synthesis and evaluation of a novel shavings-based cationic flocculant / Dai Chunji in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 2 (03-04/2018)  

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Synthesis of hyper-branched polymer with terminal amidogen and its application as formaldehyde scavenger in leather / Wang Xuechuan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIII, N° 12 (12/2008)  

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Tanning technique of Crocodylus Niloticus bag leather / Qiang Taotao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 6 (11-12/2015)  

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Tanning technique of sturgeon skin / Qiang Taotao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 5 (09-10/2014)  

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The microstructure of raw hides of crocodylus niloticus / Qiang Taotao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 4 (07-08/2018)  

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