2D/3D woven fabrics for ballistic protection / Xiaogang Chen in JEC COMPOSITES MAGAZINE, N° 79 (03/2013)  

[article]  inJEC COMPOSITES MAGAZINE > N° 79 (03/2013) . - p. 89-96 Titre : 2D/3D woven fabrics for ballistic protection Type de document : texte imprimé Auteurs : Xiaogang Chen, Auteur ; Ying Wang, Auteur ; Danmei Sun, Auteur Année de publication : 2013 Article en page(s) : p. 89-96 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Protection balistique Structures bidimensionnelles Structures tridimensionnelles Textiles et tissus à usages techniques Tissés Index. décimale : 668.4 Plastiques, vinyles Résumé : The woven construction of high-performance fibres plays an important role in ballistic protection. This paper reports on recent research on the engineering design and evaluation of 2D and 3D fabrics, emphasising the influence of ballistic fabrics' construction on ballistic performance. Based on preliminary research, a new fabric concept with material continuity and enhanced yarn gripping was put forward. Accordingly, fabrics with enhanced yarn gripping were engineered, manufactured, and evaluated. The result showed improved ballistic performance in term of both projectile penetration and trauma impact. Based on the new concept, 2D and 3D fabric constructions were discussed for ballistic protection. The construction of 3D panels was investigated and it was found that angle-layering for creating panels improves the isotropie and hence impact performance. Hybrid design of ballistic panels from the commonly used woven and UD fabrics indicated that it is possible to improve ballistic performance by using layer materials according to the impact mechanism. Finite element (FE) simulation was also used to investigate strain distribution in ballistic fabrics and panels, providing information for the optimisation of fabric construction. Note de contenu : - STATE OF THE ART - STRESS AND STRAIN DISTRIBUTION - BALLISTIC FABRIC ENGINEERING : Fabric penetration modes - Fabric balance indicator - Fabric fineness - Yarn gripping - EXPERIMENTAL EVALUATION OF 2D FABRICS : Yarn gripping effectiveness - Energy loss - STUDY ON MAKING UP 3D BALLISTIC PANELS : Angle-laid panels - 2-ply panels - 3-ply panels - Hybrid panels En ligne : https://drive.google.com/file/d/1hX81J3ThgB9KA-zAdgNu4E81XxRH2mIP/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22843 [article]

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Highly improved UV-shielding and mechanical properties of UV-curable epoxy acrylate nanocomposites by incorporating functionalized aramid nanofibers / Ying Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 1 (01/2024)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 1 (01/2024) . - p. 307-317 Titre : Highly improved UV-shielding and mechanical properties of UV-curable epoxy acrylate nanocomposites by incorporating functionalized aramid nanofibers Type de document : texte imprimé Auteurs : Ying Wang, Auteur ; Yuexin Luo, Auteur ; Yuankai Pan, Auteur ; Changmei Sun, Auteur ; Ying Zhang, Auteur ; Chunnuan Ji, Auteur ; Rongjun Qu, Auteur Année de publication : 2024 Article en page(s) : p. 307-317 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aramides Les polyamides aromatiques, ou aramides, sont une classe de matériaux résistant à la chaleur et/ou présentant de bonnes propriétés mécaniques. Ils ne peuvent être utilisés que comme fibres, qui servent surtout à la fabrication de matériaux composites, en renfort de matrices. Le mot-valise "aramide" vient de la contraction de l'anglais aromatic polyamide. Les fibres sont obtenues par filage (étirage au travers d'une filière) à partir d'une dissolution. Les chaînes moléculaires sont fortement orientées dans le sens de l'axe de la fibre, de sorte que les forces des interactions moléculaires peuvent être exploitées pour la résistance thermique et/ou mécanique. Caractérisation Charges (matériaux) Composés organiques -- Synthèse Copolymère époxy acrylate Fibre aramide Matériaux -- Propriétés fonctionnelles Matériaux hybrides Nanofibres Revêtements -- Propriétés mécaniques Revêtements -- Séchage sous rayonnement ultraviolet Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Introducing nanofillers into UV-curable coatings can not only effectively improve the performance of the coating but also impart new functions to the film. Herein, methacrylate-functionalized aramid nanofibers (mANFs) were constructed by a bottom-up approach, and their influence on the performance of UV-curable epoxy acrylate (EA) coatings was investigated. The microstructure of the EA/mANF nanocomposite was studied using X-ray diffraction and transmission electron microscopy (TEM), which confirmed the homogeneous distribution of mANFs in the matrix. The effect of mANFs on the curing kinetics was investigated. The result showed that the photopolymerization rate and final C = C bond conversion would not be adversely affected until more than 0.1 wt% mANFs were added. The UV–Vis analyses showed that the EA/mANF films maintained high transmittance in the visible light region and exhibited improved UV-shielding performance. The mechanical characteristics of EA/mANF films were significantly improved by mANFs because of strong interactions such as π–π interactions, hydrogen bonds, and chemical bonds between the matrix and mANFs. For the nanocomposite containing 0.025 wt% mANFs, tensile strength and strain at break increased by 53% and 446%, respectively, compared to neat EA. Thus, the introduction of mANFs considerably improved the mechanical performance of UV-curable EA films and expanded their application in the field of UV shielding. Note de contenu : - EXPERIMENTAL : Chemical and materials - Synthesis of methacrylate-functionalized ANFs (mANFs) - Synthesis of UV-curing EA/mANF nanocomposites - Characterization - RESULTS : Characterization of mANFs - Structure and morphological investigation of EA/mANF nanocomposites - Curing kinetics and transmittances investigation of EA/mANF nanocomposites - Mechanical properties of EA/mANF nanocomposites DOI : https://doi.org/10.1007/s11998-023-00822-2 En ligne : https://drive.google.com/file/d/1Hvchg-CTDPRYRSVnD0cvIjtvA6Kevz6o/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40449 [article]

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Insights into the composite coating for improving the weatherability of TiO2 white pigments / Ying Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 6 (11/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 6 (11/2023) . - p. 2125-2133 Titre : Insights into the composite coating for improving the weatherability of TiO2 white pigments Type de document : texte imprimé Auteurs : Ying Wang, Auteur ; Yangsong Chen, Auteur ; Ling Yang, Auteur ; Jincheng Jian, Auteur ; Shanshan Liu, Auteur ; Shiguang Guo, Auteur ; Wei Cui, Auteur ; Tao He, Auteur Année de publication : 2023 Article en page(s) : p. 2125-2133 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Composites Dioxyde de titane Photoélectrochimie Pigments inorganiques Résistance aux conditions climatiques Revêtements inorganiques Traîtements de surface Index. décimale : 667.9 Revêtements et enduits Résumé : Several inorganic coatings, such as ZrO2, SiO2, Al2O3, and AlPO4, have been utilized in the TiO2 pigment industry in order to reduce the natural photoactivity of TiO2 nanoparticles. However, the different role of each material in impacting the TiO2 photoactivity lacks comparative studies, and this is critical to provide a composite coating strategy for TiO2 pigments to achieve optimal weatherability. Our work has shown that each of these coating materials plays a unique role in suppressing the TiO2 photoactivity. For instance, ZrO2 and AlPO4 increase the rate of charge recombination, while SiO2 reduces it. By comparing and analyzing their effects on the charge carrier processes, we have designed and created a composite-coated TiO2 pigment that features a sequential deposition of ZrO2, SiO2, and AlPO4. This product has been proved to exhibit excellent weatherability. Note de contenu : - MATERIALS AND METHODS : Materials - Process of AlPO4 coating - Process of Al2O3 coating - Process of zirconia coating - Process of silica coating - Process of composite coating - Photoactivity assessment by methyl orange (MO) photodegradation - Photoelectrochemical (PEC) measurements - RESULTS AND DISCUSSION : Comparison of AlPO4 and Al2O3-coated TiO2 pigments - Investigation on silica- and zirconia-coated TiO2 pigments - Design of composite-coated TiO2 pigments - Table 1 : Effects of single coating layers toward the TiO2 photoactivity DOI : https://doi.org/10.1007/s11998-023-00809-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00809-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40187 [article]

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Preparation and properties of UV-cured epoxy acrylate/glycidyl-POSS coatings / Ying Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 3 (05/2017)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 3 (05/2017) . - p. 665-672 Titre : Preparation and properties of UV-cured epoxy acrylate/glycidyl-POSS coatings Type de document : texte imprimé Auteurs : Ying Wang, Auteur ; Fengguo Liu, Auteur ; Xiangxin Xue, Auteur Année de publication : 2017 Article en page(s) : p. 665-672 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymère époxy acrylate Matériaux hybrides Photoréticulation Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques Revêtements -- Séchage sous rayonnement ultraviolet:Peinture -- Séchage sous rayonnement ultraviolet Silsesquioxanes oligomères polyhèdres Stabilité thermique Index. décimale : 667.9 Revêtements et enduits Résumé : Epoxy acrylate (EA)/glycidyl-polyhedral oligomeric silsesquioxane (G-POSS) nanocomposites were synthesized via in situ ultraviolet initiated polymerization. XRD analysis indicates that G-POSS and EA are miscible and can form uniform composites. SEM micrographs show that the G-POSS particles (<500 nm in diameter) disperse uniformly in the polymer matrix. The EA/G-POSS nanocomposites exhibit heterogeneous morphology. FTIR analysis confirms the curing reaction is quite complete, and there are no chemical reactions between G-POSS and EA during the UV-curing process. The carbon–carbon double-bond conversion vs time profiles confirm that the addition of G-POSS improves the UV-curing rates of nanocomposites. The glass transition temperature (Tg) of nanocomposites were obtained by DMA. Tg reaches to the maximum at the loading of 1 wt% and then decreases with the increasing G-POSS loadings. The thermal stability, impact resistance, and flexibility of nanocomposites are all enhanced by the incorporation of G-POSS. Note de contenu : - EXPERIMENTAL : Materials - Sample preparation - Characterizations - RESULTS AND DISCUSSION : XRD analysis - Morphological analysis - FTIR - UV-curing process - Dynamic mechanical properties (DMA) - Thermal gravimetric analysis (TGA) - Mechanical properties DOI : 10.1007/s11998-016-9886-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9886-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28574 [article]

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Sodium silicate-assisted emulsification of methyltrimethoxysilane and formation of superhydrophobic coating thereof / Ying Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 4 (07/2015)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 4 (07/2015) . - p. 801-805 Titre : Sodium silicate-assisted emulsification of methyltrimethoxysilane and formation of superhydrophobic coating thereof Type de document : texte imprimé Auteurs : Ying Wang, Auteur ; Sheng Yang, Auteur ; Jin Fang, Auteur ; Baiyu Li, Auteur Année de publication : 2015 Article en page(s) : p. 801-805 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Emulsions Hydrophobie Méthyltriméthoxysilane Polyméthylsilsesquioxane Revêtements Silicate de sodium Index. décimale : 667.9 Revêtements et enduits Résumé : Polymethylsilsesquioxane (PMSQ) is highly heat and weather resistant and is excellent as a coating material. In the present work, the precursor for PMSQ, methyltrimethoxysilane (MTMS), was emulsified in aqueous medium with the aid of sodium silicate. It was found that at a proper concentration and ratio of MTMS to sodium silicate, the precursor MTMS could be emulsified to form an emulsion. After drying the coated emulsion on a substrate in air at room temperature, a superhydrophobic coating with water contact angle of 153° was obtained. Scanning electronic microscopy characterization indicates that the coating consists mainly of interconnected sub-100 nm particles from emulsion droplets. During drying, PMSQ formed in the emulsion droplet penetrated the outer surface of the emulsified particle, imparting hydrophobicity and nanoscale roughness to the surface. These roughness and hydrophobic properties resulted in superhydrophobicity of the coating. The process is simple and has potential for large area fabrication of superhydrophobic surfaces. DOI : 10.1007/s11998-015-9671-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9671-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24415 [article]

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Synthesis and characterization of UV-curing epoxy acrylate coatings modified with organically modified rectorite / Ying Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 1 (01/2017)  

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