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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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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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]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 3 (05-06/2017) . - p. 149-154 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 Prépolymérisation Consiste 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 Triéthylamine Index. 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 performance En ligne : https://drive.google.com/file/d/1USeTWqSt3jU5Yg0kQrC56td3qstf6SeB/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28800 [article]

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