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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Amphiphilic hyperbranched polymers : synthesis, characterization and self-assembly performance / Ren Longfang in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 2 (Année 2020)  

[article]  inJOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 2 (Année 2020) . - 12 p. Titre : Amphiphilic hyperbranched polymers : synthesis, characterization and self-assembly performance Type de document : texte imprimé Auteurs : Ren Longfang, Auteur ; Qiaoxuan Niu, Auteur ; Jing Zhao, Auteur ; Taotao Qiang, Auteur Année de publication : 2020 Article en page(s) : 12 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Composés amphiphiles Encapsulation Polymères -- Synthèse Polymères amphiphiles Systèmes auto-assemblés Index. décimale : 668.9 Polymères Résumé : A series of amphiphilic hyperbranched polymers (AHP-s, the “s” refers to the algebra of AHP) were synthesized by the reaction between hydroxyl-terminated hyperbranched polymers (HBP-s, the “s” refers to the algebra of HBP) and palmitoyl chloride. FTIR, NMR and GPC were used to determine the structure of AHP-s, the results showed that AHP-s exhibits core-shell structure. The thermal properties of polymers were investigated by DSC and TGA. It was found that AHP-2, AHP-3 and AHP-4 display higher thermal stability than AHP-1 (AHP-1, AHP-2, AHP-3 and AHP-4 represent the first, second, third and fourth generation AHP, respectively). Furthermore, the self-assembly performance of AHP-s in THF solvent was investigated by TEM and SEM. Finally, the encapsulation capacity of the AHP-s for methyl orange (MO) was explored at different concentrations of AHP-s and pH conditions. It was found that AHP-s is capable of accommodating hydrophilic guest MO. Moreover, the higher generation of AHP-s, the stronger encapsulation capacity obtained. And the encapsulation capacity closely associated with the pH of encapsulation system. Note de contenu : - EXPERIMENTAL SECTION : Materials - Synthesis of amphiphilic hyperbranched polymers (AHP-s) - Characterization - Self-assembly experimental method in THF - Methodology for dye extraction phase transfer processes - Phase transfer experiment under different pH - RESULTS AND DISCUSSION : Characterization of amphiphilic hyperbranched polymers - Thermal properties of amphiphilic hyperbranched polymers - Self-assembly of amphiphilic hyperbranched polymers in THF - Phase transfer mechanism - Phase transfer mechanism under different pH DOI : https://doi.org/10.1186/s42825-019-0015-7 En ligne : https://link.springer.com/content/pdf/10.1186/s42825-019-0015-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37328 [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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Hyperbranched polymer surfactant : synthesis, characterization and surface tension activity / Ren Longfang in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 3 (Année 2021)  

[article]  inJOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 3 (Année 2021) . - 11 p. Titre : Hyperbranched polymer surfactant : synthesis, characterization and surface tension activity Type de document : texte imprimé Auteurs : Ren Longfang, Auteur ; Zheng Tang, Auteur ; Taotao Qiang, Auteur ; Guoguo Zhang, Auteur Année de publication : 2021 Article en page(s) : 11 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Chlorure d'acide gras Concentration micellaire critique Polymères ramifiés Surfactants -- Synthèse Tension superficielle Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : A series of hyperbranched polymer surfactants (HBP-C8, HBP-C12 and HBP-C16) were synthesized by the reaction between hydroxyl-terminated hyperbranched polymers (HBP) and fatty acyl chloride. The structure of obtained hyperbranched polymer surfactant was characterized by FTIR, NMR and GPC. The results showed that the products have amphiphilic structure. The thermal property of the hyperbranched polymer surfactant investigated by DSC and TGA was strongly influenced by the length of end alkyl chain. Surface activity of hyperbranched polymer surfactant was analyzed by surface tension method and UV spectrophotometry, respectively. The results showed that hyperbranched polymer surfactant took on better surface activity, which can effectively reduce the surface tension of the water. The hyperbranched polymer surfactant has a lower critical micelle concentration (CMC) and displays single molecular micellar properties, which can package small hydrophilic molecules in relatively low concentration. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of hyperbranched polymer surfactant - Testing and characterization - Surface tension activity of HBP-C - Critical micelle concentration (CMC) of HBP-C - RESULTS AND DISCUSSION : Characterization of HBP-C - Optimization of HBP-C - Grafting rate of HBP-C - Thermal properties of HBP-C - Surface tension of HBP-C - CMC of HBP-C - Table 1 The grafting rate of HBP-C - Table 2 GPC results of HBP-C DOI : https://doi.org/10.1186/s42825-020-00049-6 En ligne : https://link.springer.com/content/pdf/10.1186/s42825-020-00049-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37473 [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)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 100, N° 3 (05-06/2016) . - p. 109-113 Titre : Leather solid waste : a review. A low cost adsorption material based on collagen fibre Type de document : texte imprimé Auteurs : Qiang Taotao, Auteur ; Li Xiaoning, Auteur ; Ren Longfang, Auteur ; Wang Xuechuan, Auteur Année de publication : 2016 Article en page(s) : p. 109-113 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants Adsorption Aldéhydes Un aldéhyde est un composé organique, faisant partie de la famille des composés carbonylés, dont l'un des atomes de carbone primaire (relié au plus à 1 atome de carbone) de la chaîne carbonée porte un groupement carbonyle. L'aldéhyde le plus simple est le formaldéhyde (ou méthanal), aussi appelé formol lorsqu'il est en solution aqueuse. Un aldéhyde dérive formellement d'un alcool primaire (oxydation) dont le groupement hydroxyde -OH est en bout de chaîne et se forme suite à l'enlèvement de deux atomes H d'où le nom "alcool déshydrogéné" ou aldéhyde. Collagène Cuirs et peaux -- Déchets -- Recyclage Ions métalliques Polymères ramifiés Réticulation (polymérisation) Tanins Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Nowadays, collagen fibre attracts more and more domestic and foreign interest because of its unique structure and biological properties. Collagen fibre is the main component of leather solid waste and it has unique physical and chemical properties. lt is a potential biomass adsorption material with a wide range of applications. As an adsorption material, the cost of collagen fibre is low, il also has excellent biocompatibility and biodegradability. However, the studies have shown that the direct use of collagen fibre as an adsorbent material has disadvantages, such as low adsorption capacity, poor selectivity and inability to resist high temperatures. In order to meet the practical application conditions of adsorption, and broaden its application areas, many researchers have studied the modification of collagen fibre using metal ions, tannin, hyperbranched polymers, and aldehydes etc. The problems and the technological focus in the research of adsorbants based on collagen fibre are indicated. Note de contenu : - COLLAGEN FIBRE ADSORBENTS - MODIFICATION OF THE COLLAGEN FIBRE : Loaded with metal ion - Tannin immobilized on collagen fibre - Modification by hyperbranched polymer - Aldehyde crosslinking - Other modification methods - APPLICATION PROSPECTS En ligne : https://drive.google.com/file/d/1iSuy9ekUMSMEzxq_qgzgtCN49sMJsqH9/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26442 [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)  

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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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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 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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