Evaluation of environmental impact of typical leather chemicals. Part 3 : Biodegradability of vegetable tannin extracts by activated sludge / Qiang He in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 3 (05-06/2008)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 92, N° 3 (05-06/2008) . - p. 103-106 Titre : Evaluation of environmental impact of typical leather chemicals. Part 3 : Biodegradability of vegetable tannin extracts by activated sludge Type de document : texte imprimé Auteurs : Qiang He, Auteur ; Danhong Sun, Auteur ; Xin Liu, Auteur ; Lin Wei, Auteur ; Bi Shi, Auteur Année de publication : 2008 Article en page(s) : p. 103-106 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biodégradation Boues résiduaires -- Analyse Cuirs et peaux -- Industrie -- Aspect de l'environnement Déchets industriels -- Elimination Environnement -- Etudes d'impact Tanins végétaux Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The short-term (5 day) and long-term (30 day) biodegradation behaviours of black wattle, bayberry, valonia and chestnut tannin extracts were systematically investigated in this paper. The results indicated that all of these four vegetable tannin extracts are biodegradable although they might retard the biodegradation process to some extent owing to the inhibitory effect of tannins on the activated sludge process. Short-term biodegradabilities of the four tannin extracts were concentration-dependent. These tannin extracts could be effectively biodegraded in 5 days at concentrations of 0.25g/L, but the biodegradation process was retarded remarkably when the concentrations were increased to 5.00g/L. In general, short-term biodegradabilities of the four tannin extracts follow the sequence of valonia tannin>chestnut tannin>bayberry tannin>wattle tannin, implying that the hydrolysable tannins are easier to biodegrade than the condensed tannins. The results of long-term biodegradation showed that all of the four vegetable tannin extracts can be completely biodegraded by prolonging the activated sludge process, even if they are present at high concentration. Therefore, the encouraging findings in this research suggest that vegetable tannin extracts are environmentally friendly leather chemicals. Note de contenu : - BOD5/COD values of vegetable tannin extracts - Respiration of activatedslud ge in the presence of vegetable tannin extracts - COD removals of vegetable tannin extracts by the activatedslud ge process - COD removals (%) of vegetable tannin extracts at different concentrations - Table 1 : Type andtannin content of vegetable tannin extracts tested in experiments - Table 2 : BOD5 /COD values of vegetable tannin extracts at different concentrations En ligne : https://drive.google.com/file/d/1rkdcAB3YoMjEm3urqqTf-HjnXnzkK-x3/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38954 [article]

Exemplaires

Code-barres	Cote	Support	Localisation	Section	Disponibilité
aucun exemplaire

Multi-objective optimization of injection molding process parameters based on BO-RFR and NSGAII methods / Yanli Cao in INTERNATIONAL POLYMER PROCESSING, Vol. 38, N° 1 (2023)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. 38, N° 1 (2023) . - p. 8-18 Titre : Multi-objective optimization of injection molding process parameters based on BO-RFR and NSGAII methods Type de document : texte imprimé Auteurs : Yanli Cao, Auteur ; Xiying Fan, Auteur ; Yonghuan Guo, Auteur ; Wenjie Ding, Auteur ; Xin Liu, Auteur ; Chunxiao Li, Auteur Année de publication : 2023 Article en page(s) : p. 8-18 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Eléments finis, Méthode des Gauchissement (matériaux) Matières plastiques -- Moulage par injection Optimisation multi-objectif L'optimisation multiobjectif (appelée aussi Programmation multi-objective ou optimisation multi-critère) est une branche de l'optimisation mathématique traitant spécifiquement des problèmes d'optimisation ayant plusieurs fonctions objectifs. Elle se distingue de l'optimisation multidisciplinaire par le fait que les objectifs à optimiser portent ici sur un seul problème. Les problèmes multiobjectifs ont un intérêt grandissant dans l'industrie où les responsables sont contraints de tenter d'optimiser des objectifs contradictoires. Ces problèmes peuvent être NP-difficiles. Leur résolution en des temps raisonnables devient nécessaire et alimente une partie des chercheurs travaillant dans la recherche opérationnelle. (Wikipedia) Retrait volumique Tags : 'Régression  forestière  aléatoire  optimisée  bayésienne  (BO-RFR)'  'Optimisation  multi-objectifs'  'Moulage  par  injection  plastique  (PIM)' Index. décimale : 668.4 Plastiques, vinyles Résumé : Injection molding of thin-walled plastic parts with minimum deformation in warpage and volume shrinkage is crucial for part quality. Simulation combined Latin hypercube sampling approach was used to research the effects of different process parameters on deformation. Then, random forest regression (RFR) is used to construct the mathematical relationship between process parameters and defects, such as warpage and volume shrinkage. The gaussian process is used as probabilistic surrogate model, while the probability of improvement is used as acquisition function to construct a Bayesian optimization for RFR’s hyperparameters, and the performance of random search is compared. In addition, the gradient boosting regression (GBR) and support vector regression (SVR) were also adopted to establish the prediction models, respectively. Comparing all the above prediction models, it can be found that the Bayesian optimized random forest regression (BO-RFR) has the highest accuracy. The Non-dominated Sorting Genetic Algorithm-II (NSGA-II) is interfaced with the predictive models to find the optimum design parameters for the purpose of effectively predicting and controlling warpage and volume shrinkage. The results show that warpage is reduced by 66.03% while volume shrinkage is 46.20% after optimizing. The final finite element simulation and physical tests indicate that this proposed method can effectively achieve the multi-objective optimization of injection molding. Note de contenu : - FINITE ELEMENT SIMULATION ANALYSIS AND OPTIMIZATION STRATEGY : Finite element model - Latin hypercube sampling - Multi-objective optimization strategy - BO-RFR : RFR - BO - BO-RFR - Evaluation - MULTI-OBJECTIVE OPTIMIZATION : NSGA-II - Multi-objective optimization through NSGA-II - Trade-off analysis - VERIFICATION OF THE OPTIMIZATION RESULTS : Finite element simulation verification - Experimental verification - Table 1 : Range of design parameters - Table 2 : LHS and simulation results - Table 3 : Optimal hyperparameters - Table 4 : Evaluation of different models - Table 5 : Verification of optimal process parameters - Table 6 : Results of measurements of warpage and volume shrinkage DOI : https://doi.org/10.1515/ipp-2020-4063 En ligne : https://drive.google.com/file/d/1HWBGIG1npEvYy42X7mOUp9Suq4mZMAhV/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39190 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
24052	-	Périodique	Bibliothèque principale	Documentaires	Disponible

One-bath union dyeing of wool/polytrimethylene terephthalate blends / Jinhuan Zheng in COLORATION TECHNOLOGY, Vol. 124, N° 4 (2008)  

[article]  inCOLORATION TECHNOLOGY > Vol. 124, N° 4 (2008) . - p. 204-210 Titre : One-bath union dyeing of wool/polytrimethylene terephthalate blends Type de document : texte imprimé Auteurs : Jinhuan Zheng, Auteur ; Xin Liu, Auteur ; P. Rex Brady, Auteur Année de publication : 2009 Article en page(s) : p. 204-210 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : The one-bath dyeing of blends of polytrimethylene terephthalate (PTT) staple and wool has been investigated. The exhaustion of selected Terasil disperse dyes on PTT fibre and Lanasol reactive dyes on wool was measured as a function of temperature, together with the cross-staining of the Terasil dyes on the wool component and the Lanasol dyes on PTT component. Most Terasil disperse dyes achieved satisfactory dye uptake on PTT at 110 °C, whereas on conventional polyester (polyethylene terephthalate) temperatures of up to 130 °C are required. An optimised union-dyeing technique for wool/PTT blends was developed which minimised the staining of Terasil disperse dyes on wool and produced dyed goods with high levels of wet colour fastness. Carriers were not required to enhance the dyeability of PTT at low temperatures. The wool component appeared to be protected against damage at 110 °C by the reactive dyes. The results indicate the potential for blending PTT fibre and wool to produce fabrics that are easier to dye at lower temperatures than conventional wool/polyester blends. DOI : 10.1111/j.1478-4408.2008.00142.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2008.00142.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3165 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
010964	-	Périodique	Bibliothèque principale	Documentaires	Disponible

A rapid two-step electroless deposition process to fabricate superhydrophobic coatings on steel substrates / Jinlong Song in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 5 (09/2012)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 5 (09/2012) . - p. 643-650 Titre : A rapid two-step electroless deposition process to fabricate superhydrophobic coatings on steel substrates Type de document : texte imprimé Auteurs : Jinlong Song, Auteur ; Xin Liu, Auteur ; Yao Lu, Auteur ; Libo Wu, Auteur ; Wenji Xu, Auteur Année de publication : 2012 Article en page(s) : p. 643-650 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique. L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1. C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple. Argent Dépôt autocatalytique Hydrophobie Revêtement métallique Index. décimale : 667.9 Revêtements et enduits Résumé : The present study reports a simple, highly effective, and safe two-step electroless deposition process for rapidly fabricating superhydrophobic Ag coatings on steel substrates. The steel plates were first immersed in the 1 mol/L aqueous CuSO4 solution for 20 s, and then immersed in the 0.03 mol/L aqueous AgNO3 solution containing 1 wt% fluoroalkylsilane (FAS) for 2 min. The sample surfaces were characterized by energy-dispersive x-ray spectroscopy, Fourier transform infrared spectrophotometry (FTIR), x-ray diffraction, scanning electron microscopy, step profiler, and optical contact angle measurements. The results show that, after the two-step electroless deposition process, the Ag coatings composed of the binary micro/nanometer-scale rough structures containing the FAS molecules with a low surface energy are formed on the steel surfaces. The as-prepared Ag coatings exhibit a good superhydrophobicity with a 163.4 ± 1.8° water contact angle and 1.5 ± 0.5° rolling angle. DOI : 10.1007/s11998-012-9431-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9431-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16036 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
14190	-	Périodique	Bibliothèque principale	Documentaires	Disponible

A study of the relevance of plate quality and print quality to UV flexographic folding carton printing / Xin Liu in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B3 (09/2004)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 87, B3 (09/2004) . - p. 167-174 Titre : A study of the relevance of plate quality and print quality to UV flexographic folding carton printing Type de document : texte imprimé Auteurs : Xin Liu, Auteur ; C. Bryant, Auteur ; James Thomas Guthrie, Auteur Année de publication : 2004 Article en page(s) : p. 167-174 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cartonnages Encre flexographique Flexographie Photopolymères Index. décimale : 667.9 Revêtements et enduits Résumé : The quality of a flexographic print owes much to the printing plates that are used in terms of their composition and their ability to deliver the required image to specification. This paper examines some of the criteria that are of relevance to the creation of quality blankets from which quality prints can be realised. Note de contenu : - EXPERIMENTAL : Material - Printing trials - Equipment and analysis - RESULTS AND DISCUSSION : Plate quality - Printing quality - Table 1 : The image information on the negative film - Table 2 : Dot areas on the 100-, 120- and 150 -screen rulings for some photopolymer plates - Table 3 : Relative standard deviation of dot areas on the 100-screen rulings for some photopolymer plates - Table 4 : Relative standard deviation of dot areas on the 120-screen rulings for some photopolymer plates - Table 5 : Relative standard deviation of dot areas on the 150-screen rulings for some photopolymer plates - Table 6 : The hardness on different locations for the some photopolymer plates - Table 7 : The plate average hardness and its relative standard deviation - Table 8 : The apparent thickness on different locations for some photopolymer plates - Table 9 : The plate average apparent thickness and its relative standard deviation - Table 10 : Dot areas on thenegative film used in plate making - Table 11 : Dot gain from the plate-making process - Table 12 : Surface energy for the photopolymer printing plates - Table 13 : Solid print density on the prints produced using different plates - Table 14 : Dot gain, on the 100-, 120- and 150-screen rulings, for the prints produced using different photopolymer plates DOI : 10.1007/BF02699631-EX En ligne : https://link.springer.com/content/pdf/10.1007/BF02699631.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5454 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
000390	-	Périodique	Bibliothèque principale	Documentaires	Disponible

The adsorption performance of Vat Scarlet R on natural superfine needle down particles / Fengxiang Chen in COLORATION TECHNOLOGY, Vol. 132, N° 1 (02/2016)  

Permalink

Unified modelling and simulation of composite materials and structures / Wenbin Yu in JEC COMPOSITES MAGAZINE, N° 134 (05-06/2020)

Permalink

Utilization of waste wool fibers for fabrication of wool powders and keratin : a review / Chunhua Zhang in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 2 (Année 2020)  

Permalink

---

1 (1 - 8 / 8)