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Auteur Wei Chen |
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Analysis on gold tailings-based aerated concrete in different phases of autoclave curing based on nuclear magnetic resonance / Qian Li in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 29, N° 6 (12/2019)
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Titre : Analysis on gold tailings-based aerated concrete in different phases of autoclave curing based on nuclear magnetic resonance Type de document : texte imprimé Auteurs : Qian Li, Auteur ; Keqing Li, Auteur ; Wen Ni, Auteur ; Siqi Zhang, Auteur ; Dezhong Li, Auteur ; Wei Chen, Auteur Année de publication : 2019 Article en page(s) : p. 381-387 Note générale : Bibliogr. Langues : Français (fre) Catégories : Béton cellulaire
Matériaux cimentaires -- Analyse
Or
Résonance magnétique nucléaireIndex. décimale : 620.13 Matériaux de construction : pierre, ciment, béton, liants de Résumé : This paper prepares an aerated concrete (AC) with gold tailings as the main material, and explores the influence of different phases of autoclave curing on the microstructure of the proposed AC. Three specimens were selected for nuclear magnetic resonance (NMR) tests: the specimen not autoclaved after the 12h static curing, the specimen autoclaved for 0h in the autoclave (i.e. only heated up and cooled down), and the specimen autoclaved for 8h under constant temperature. The three specimens are denoted as NAC, AAC-0 and AAC-8, respectively. The internal structures of the specimens in each phase of autoclave curing were analyzed through 27Al NMR and 29Si NMR tests. The results show that the Si-O tetrahedrons in the AAC-8 specimen mainly exist in the form of Q2 structures ; the 1.1nm tobermite crystal is a chain silicate. The research results help to reveal the reaction mechanism of the AC in each phase of curing, and improve the performance of gold tailings-based AC. Note de contenu : - METHODOLOGY : Raw materials - Specimen preparation
- TEST RESULTS AND DISCUSSION : AI NMR analysis on AC specimens - Si NMR analysis on AC specimensDOI : https://doi.org/10.18280/rcma.290607 En ligne : https://www.iieta.org/download/file/fid/21565 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34945
in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 29, N° 6 (12/2019) . - p. 381-387[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22409 - Périodique Bibliothèque principale Documentaires Disponible Polymer and aligned carbon nanotube nanocomposites and nanodevices / Liangti Qu in SAMPE JOURNAL, Vol. 43, N° 6 (11-12/2007)
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Titre : Polymer and aligned carbon nanotube nanocomposites and nanodevices Type de document : texte imprimé Auteurs : Liangti Qu, Auteur ; Wei Chen, Auteur ; Liming Dai, Auteur Année de publication : 2007 Article en page(s) : p. 38-46 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 668.4 Plastiques, vinyles Résumé : We have previously developed a simple pyrolytic method for large-scale production of aligned carbon nanotube arrays perpendicular to the substrate. These aligned carbon nanotube arrays can be transferred onto various substrates of particular interest in either a patterned or non-patterned fashion. The well-aligned structure provides additional advantages for not only an efficient device construction but also surface functionalization (both the inner and outer wall). The surface functionalization of aligned carbon nanotubes is particularly attractive, as it allows surface characteristics of the aligned carbon nanotubes to be tuned to meet specific requirements for particular applications while their alignment structure can be largely retained. These aligned carbon nanotubes with tunable surface characteristics are of great significance to various practical applications, including nanotube sensors and optoelectronics. For instance, we have previously immobilized glucose oxidase (GOX) onto the aligned multi-wall carbon nanotube arrays by electropolymerization of pyrrole in the presence of GOX. The resultant GOX-containing polypyrrole-carbon nanotube coaxial nanowires were shown to be promising new sensing active materials for making advanced glucose sensors with a high sensitivity. Also, singlestrand DNA chains have recently been chemically grafted onto aligned carbon nanotube electrodes, leading to novel aligned carbon nanotube-DNA sensors of a high sensitivity and selectivity for probing complementary DNA and target DNA chains of specific sequences. More recently, we have also developed a rational approach to partially coat perpendicularly- aligned carbon nanotube arrays with an appropriate polymer thin film along their tube length to create synergetic effects, which provide the basis for developing novel sensors for the detection of chemical vapors, thermal and mechanical stimuli with a high sensitivity, good selectivity, excellent environmental stability, and low power consumption. In this talk, we will summarize our work on the preparation of polymer and aligned carbon nanotube nanocomposites and nanodevices. Potential applications of polymer and aligned carbon nanotube nanocomposites in other areas will also be discussed. Note de contenu : - Composites of aligned CNTs with conducting polymers
- Composites of aligned CNTs with DNA
- Composites of region-confined aligned CNTs with polymersPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23201
in SAMPE JOURNAL > Vol. 43, N° 6 (11-12/2007) . - p. 38-46[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 008331 - Périodique Bibliothèque principale Documentaires Disponible UV/vis energy-cure adhesives and sealants : industry trends, chemistry, and packaging / Wei Chen in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 21, N° 11 (11/2014)
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Titre : UV/vis energy-cure adhesives and sealants : industry trends, chemistry, and packaging : Applications for energy-cured coatings, adhesives and sealants have grown rapidly Type de document : texte imprimé Auteurs : Wei Chen, Auteur ; Dillon Desai, Auteur Année de publication : 2014 Langues : Américain (ame) Catégories : Adhésifs -- Séchage sous rayonnement ultraviolet
Adhésifs dans les équipements électriques/électroniques
Bois -- Collage
Emballages
Joints d'échantéité -- Séchage sous rayonnement ultraviolet
Mastics dans les équipements électriques/électroniquesIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : With governments and corporations increasingly emphasizing innovation, advanced materials, new energy technologies, and sustainability, applications for energy-cured coatings, adhesives, and sealant systems have grown rapidly. According to a recent survey by RadTech International, the average anticipated annual growth rate of energy-cured formulations will accelerate to 7% or more per year in North America.
Energy-cured systems (with the exception of dual-cure systems) typically use ultraviolet (UV) energy, visible light (vis), or electron beam (as opposed to thermal, moisture-activated, or oxidative reactions) to form a bead, coating, film, pattern, bond, or shape. Typical energy levels used for energy cure are 200-400 nanometers (nm) for UV light, 400-450 nm for fluorescent and visible light, and less than ~ 400 KeV for low-energy electrons. This article focuses on UV/vis light cure technology.En ligne : http://www.adhesivesmag.com/articles/93372-uvvis-energy-cure-adhesives-and-seala [...] Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24361
in ADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 21, N° 11 (11/2014)[article]Exemplaires
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