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Recent studies on carbon nano tube based functional coatings with respect to properties and applications / Avishek Mazumder in PAINTINDIA, Vol. LXX, N° 3 (03/2020)
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Titre : Recent studies on carbon nano tube based functional coatings with respect to properties and applications Type de document : texte imprimé Auteurs : Avishek Mazumder, Auteur ; Narayani Rajagopalan, Auteur Année de publication : 2020 Article en page(s) : p. 55-72 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Automobiles -- Revêtements
Camouflage (science militaire)
Composés organiques -- Synthèse
Condensateurs électriques
Conducteurs organiques
Décharges électriques
Dépôt chimique en phase vapeur
Lasers -- Applications industrielles
Matériaux -- Propriétés fonctionnelles
Morphologie (matériaux)
Revêtement conducteur
Tribologie (technologie)Index. décimale : 667.9 Revêtements et enduits Résumé : Multi-walled and single walled carbon nanotubes (CNTs) are synthesized by methods namely 'Arc discharge', 'Laser Ablation', 'Chemical Vapor Deposition'. Due to its unique properties CNTs are considered as the backbone of futuristic coatings. As on date, it has wide area of usage right from medical and biomedical sciences to high performance conducting coatings to aerospace and specific defense equipment coatings. The techno-commercial aspect is brightest amongst all the nano-particle or composite systems available. CNTs are basically products of rolled carbon sheets. Based on the sheets, the basic characterization of CNT happens and is classified in two groups, namely, single walled or multi walled. CNTs are functionalized s to enhance its performances which are more commercially viable, for example these functionalized CNTs are used in acrylic system for automotive paints and incorporates advance coating properties in automotive paints like anti-dust, superhydrophobicity etc. CNT coatings finds its application in a wide area of functional coatings like windshields for anti-glare, anti-dust, anti-fog properties. The properties, their final application, process of authentication of the properties, functionalization of CNTs and the works related to further modification of CNT itself and coatings which can be modified by CNTs are discussed in th is paper. Note de contenu : - INTRODUCTION : History of carbon nanotube (CNT) - Morphology of carbon nanotube (CNT)
- METHODS OF SYNTHESIS : Arc discharge - Laser ablation - Chemical vapor deposition
- PROPERTIES OF CNTS
- CNT BASED COATINGS : CNT based conductive coatings - CNT coating for supercapacitors - CNT coating for automobile application - CNT coating for tribological application - CNT based ccamouflage coating - CNT coating for defense application
- Fig. 1 : Aspect ratio of CNT
- Fig. 2 : Model of CNT
- Fig. 3 : Arc discharge method
- Fig. 4 : Laser ablation method of CNT synthesis
- Fig. 5 : CNT film SPM image (2-µm scan size) showing morphology of CNT film
- Fig. 6 : Optical visible-light transmittance of ITO, PEDOT and CNT films
- Fig. 7 : Color measurement of CNT, ITO and PEDOT films
- Fig. 8 : Optoelectronic performance of CNT transparent conductive coatings
- Fig. 9 : FESEM images of the l-1202-treated t-MWNT/silane hybrid films (50wt.% silane content) a) without and b) with silica nanoparticles c) FESEM image of a pure 100 wt%)
- Fig. 10 : Water CA (triangles) and sheet resistance (Rs) (circles) versus transmittance of CNT/silane hybrid films (70 wt% silane content) without (open) and with (solid) SNs. The upper image shows water droplets on transparent and conductive films
- Fig. 11 : SEM images of Vantablackcoating at magnifications of 2500 X and Vantablack-s at 2750 X
- Fig. 12 : Comparison chart between Vantablack-s and Treatment A (paint commonly used for extended-area Blackbody emitter plates of IR spectral emissivity)
- Fig. 13 : AFM images of CNT on titanium surface
- Fig. 14 : Tafel plots for Ti and Ti-CNT samples
- Fig. 15 : Loading and un-loading curve for CNT covered titanium in dependence from indentation depth
- Fig. 16 : Viability of host cells after 3 and 7 days culture on different surface
- Fig. 17 : Host cell morphology stained with acridine orange on Ti surface (A) and CNT-covered Ti surface (B) after 7 days of culture
- Fig. 18 : Printed supercapacitors
- Fig. 19 : Synthesis of functionalized carbon nanotubes
- Fig. 20 : TEM image of the sample of (amino-isophthalic acid)-SWCNTs and p-anisidine-SWCNTs and SEM image showing interconnections of two nanotubes
- Fig. 21 : SEM image of the sample P1SWOH4 distribution of nanotubes in the matrix, and OH-SWCNTs after degradation of the matrix
- Fig. 22 : Relation between the fastness of thermal dissipation
- Fig. 23 : Degradation of sample (1) Target (2) P1SW3 (SWCNT) (3) P1SWOH4 (OH SWCNT) (4) P1SWFC4 (anisidine-SWCNT) using the electron now of 30 kV
- Fig. 24 : XRD patterns of coated samples after annealing @ 673K for 2 hours
- Fig. 25 : Friction coefficients of Cu-matrix CNT composites at different applied Ioads
- Fig. 26 : Difference in IR reflectance of a CNT coated and uncoated surface
- Fig. 27 : Carbon camo: A coating of carbon nanotubes, visible in the scanning-electron micrograph at left, makes the tank pattern invisible under a light microscope at rightEn ligne : https://drive.google.com/file/d/13owmPbR_LA1bRtpe7GxvrMfkGi7yP053/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34653
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Code-barres Cote Support Localisation Section Disponibilité 22358 - Périodique Bibliothèque principale Documentaires Disponible Electron beam curing - Emerging platform for wood coatings / Yogesh B. More in PAINTINDIA, Vol. LXX, N° 3 (03/2020)
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Titre : Electron beam curing - Emerging platform for wood coatings Type de document : texte imprimé Auteurs : Yogesh B. More, Auteur Année de publication : 2020 Article en page(s) : p. 74-80 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bois -- Revêtements protecteurs
Monomères
Oligomères
Photoamorceurs (chimie)
Revêtements -- Séchage sous rayonnement électronique
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Wood coatings are used to protect and decorate wooden substrate. The real beauty of these coatings is that they are available in various types of chemistries-whether it is acid curing, one component polyurethane, two component polyurethane, water-based or recently developed ultraviolet curing (UV). Several reviews have been published on these chemistries and discussed. But what is the next chemistry for wood coating is a million dollar question and yes, there is an answer to it. The chemistry which probably fits into this answer is Electron Beam curing (EB). UV curable chemistries always depend on a photoinitiator molecule to catalyze the polymerization process. When the photointiator is excited by a UV light, it releases the energy needed for the diluents to react. EB curing systems deliver energy directly to the polymer in the form of energetic electrons. EB curable chemistries are almost identical to UV curable, but EB coatings do not require a photointiator. Whi le UV curing is highly dependent on the efficiency of the photoinitiator, EB curing does not require any special additives or catalysts. According to studies, electron is subatomic particle with negative charge and plays an essential role in numerous physical phenomena, such as electricity, magnetism, chemistry and thermal conductivity. The same source of electrons is used to cure the coatings in case of Electron Beam technology with minimal extractable from coating. This review article reveals about the mechanism of EB coatings, compositions of EB coatings, future possibilities of EB coatings on wood and additional benefits in near future. Note de contenu : - INTRODUCTION : EB curing mechanism - Energy transfer - Depth of penetration - Absorbed dose - D = K xI/V - Beam uniformity - Throughput
- ELECTRON BEAM WOOD COATINGS : EB curable compositions - Monomers - Additives
- FUTURE POSSIBILITIES OF ELECTRON BEAM WOOD COATINGS
- Fig. 1 : Electromagnetic spectrum
- Fig. 2 : Typical diagram of EB curing technique
- Fig. 3 : Range of penetration with different accelerating voltage 13µm titanium foil and 20 mm of nitrogen
- Fig. 4 : Reaction mechanism of EB curing process
- Fig. 5 : Penetration thickness for UV and EB technology
- Table 1 : Densities of various species of wood
En ligne : https://drive.google.com/file/d/1FIEA3Gxzpxz-5OTBR7dJ1j5Ztc7HwGHH/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34654
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Titre : Secret of purity of water of river Ganga Type de document : texte imprimé Auteurs : Vinod C. Malshe, Auteur Année de publication : 2020 Article en page(s) : p. 82-92 Langues : Anglais (eng) Catégories : Cours d'eau -- Salubrité
Eau -- Analyse
Eau douce
EchantillonnageIndex. décimale : 667.9 Revêtements et enduits Résumé : River Ganges, (here in after referred as Ganga throughout this text) is most respected river of India. It flows from north to south east starting from Gangotri Glacier. It flows nearly 600 km on mountainous terrine before touching planes. Ganga water is deemed to be very pure. A dip in Ganga is believed to wash ail sins and due to very high respect given to the "Ganga Jal" (water of river Ganga) every Hindu is fed with drops of Ganga water in his mouth in his dying moments. Ganga water is preserved in ail Hindu households in small copper or glass vessels that do not grow bacteria or algae even after storage for over 25 to 30 years. This has been a great puzzle to scientists of India and various theories are proposed. This water has been recognized to be pure for centuries. Interesting information can be found including a "Factor X" that keeps this water so fresh. Invaders turned rulers of this country like Akbar and British, carried Ganga water with them on their 2 to 3 month's long journeysto middle east and Europe, because of its purity. Reference to these can be found in historical books. The information found on internet is collated and presented in Apendix 1. Note de contenu : - EXPERIMENTAL : Sample collection - Analytical
- RESULTS AND DISCUSSION
- CONCLUSIONS :
- APPENDIX 1 : Bacteriophages may explain Ganga's healing abilities - Practical applications
- Table 1 : Concentration of dissoked silver in water samples collected on every second Saturday of a month from Haridwar year 2016-17
- Table 2 : Silver analysis of sand collected from Haridwar
- Table 3 : Ganga water analysis for silver content from Simhastha. Location : Prayag Raj (Allahabad-UP) month of collection : February and march 2019
- Table 4 : Ganga River Sand Analysis for, Silver Content. Location : Prayag Raj. Month of collection : March 2019
- Table 5 : Results of disinfection of gram negative bacteri with sand collected from Prayag Raj onEn ligne : https://drive.google.com/file/d/1SteqITPFk60HK5GDExRMZk9mcJTEIXGn/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34655
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Titre : Surface properties of polymers Type de document : texte imprimé Auteurs : Tipanna Melkeri, Auteur Année de publication : 2020 Article en page(s) : p. 93-99 Langues : Anglais (eng) Catégories : Angle de contact
Energie de surface
Polymères -- Surfaces
Rugosité
Tension superficielleIndex. décimale : 668.9 Polymères Résumé : The surface energy, surface tension and contact angle of the polymers are related to surface properties of polymers. Surface properties are important in many applications of polymer as paint, inks and adhesives. Surface tension is the tendency of fluid surfaces to shrink into the minimum surface area possible. Surface tension is an important factor in the phenomenon of capillarity. Capiilary rise method and Stallagmometer method - drop weight method are widely used methods for measuring surface tension. The contact angle is the angle, conventionally measured through the liquid, where a liquid-vapor interface meets a solid surface. If 0 = 0 °, the liquid completely wets the substrate. If ° < 0 < 90 °, high wetting occurs. If 90 ° < 9 < 180°, low wetting occurs and If 0 = 180 °, the liquid does not wet the substrate at all. Surface roughness has a strong effect on the contact angle and wettabiIity of a surface. The surface energy may therefore be defined as the excess energy at the surface of a material compared to the buIk, or it is the work required to buiId an area of a particular surface. Another way to view the surface energy is to relate it to the work required to cut a bulk sample, creating two surfaces. Surface energy comes into play in wetting phenomena. The spreading parameter "S" can be used to nnathematically determine this. If S < 0, the liquid partially wets the substrate. If S > 0, the liquid completely wets the substrate. Surface energy of solid polymer is determined by using Zisman theory and the Owens/Wendt theory. Note de contenu : - SURFACE PROPERTIES
- SURFACE TENSION : In terms of force - In terms of energy
- METHODS OF SURFACE TENSION MEASUREMENTS : Capillary rise method - Drop volume method -stalagmometric method
- CONTACT ANGLE
- EFFECT OF ROUGHNESS TO CONTACT ANGLES
- DYNAMIC CONTACT ANGLES
- DETERMINATION OF CONTACT ANGLE : The static sessile drop method - Advantages and disadvantages - The pendant drop method - The dynamic sessile drop method - Dynamic Wilhelmy method - Advantages and disadvantages
- SURFACE FREE ENERGY
- SPREADING PARAMETER
- DETERMINATION OF SURFACE ENERGY : Based on the Zisman theory
- THE OWENS/WENDT THEORY
- Table : Surface energy and contact angle of the few commercial polymersEn ligne : https://drive.google.com/file/d/1w1fuu3OMnTXt7BH-CbrWjRRhW2YjCq2X/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34656
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Code-barres Cote Support Localisation Section Disponibilité 22358 - Périodique Bibliothèque principale Documentaires Disponible Volatile organic compounds in water based paints / M. Veeramani in PAINTINDIA, Vol. LXX, N° 3 (03/2020)
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Titre : Volatile organic compounds in water based paints Type de document : texte imprimé Auteurs : M. Veeramani, Auteur Année de publication : 2020 Article en page(s) : p. 112-114 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composés organiques volatils
Revêtements -- Teneur en composés organiques volatils:Peinture -- Teneur en composés organiques volatils
Revêtements en phase aqueuse:Peinture en phase aqueuseIndex. décimale : 667.6 Peintures Résumé : The recent years saw a lot of discussions and concerns about Volatile Organic Compounds (VOC) in water based paints. It is centred in how to avoid or how to reduce it to stipulated International Standards. This can be achieved only by not using those raw materials which are chiefly contributing to VOC in Water Based Paints. Note de contenu : - What is a VOC and why are they used in paints ?
- Why was this legislation introduced ?
- What is the UK legislation on VOC's ?
- Water based Vs solvent based paints : What you need to knowEn ligne : https://drive.google.com/file/d/1OZXfMKegTt2dgUTsdwmhtpq-r_yc-I4t/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34657
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Code-barres Cote Support Localisation Section Disponibilité 22358 - Périodique Bibliothèque principale Documentaires Disponible Specifications of oil - Fatty acids - III / Mukund Hulyalkar in PAINTINDIA, Vol. LXX, N° 3 (03/2020)
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Titre : Specifications of oil - Fatty acids - III Type de document : texte imprimé Auteurs : Mukund Hulyalkar, Auteur Année de publication : 2020 Article en page(s) : p. 116 Langues : Anglais (eng) Catégories : Acides gras
Revêtements (produits chimiques)
Revêtements organiques
SpécificationsIndex. décimale : 667.9 Revêtements et enduits En ligne : https://drive.google.com/file/d/1HTIs2k7Tdn0F1MthNS75HGQ8Os-1WOCc/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34658
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Titre : Benefits of CNSL resins - II Type de document : texte imprimé Auteurs : Mukund Hulyalkar, Auteur Année de publication : 2020 Article en page(s) : p. 118-120 Langues : Anglais (eng) Catégories : Acides carboxyliques
Biopolymères
Groupe hydroxyle
Noix de cajou et constituants
PhénolsNote de contenu : - Modification of CNSL or resins of CNSL
- Modification
- Polymerization product
- How to utilize the CNSL resins
- Drawbacks of CNSL
- Fig. 1 : Composition of CNSLEn ligne : https://drive.google.com/file/d/1q2yfI0OB4A8accGGkQw3Fv4gAWbiNKVi/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34659
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Titre : Smart water proofing technology Type de document : texte imprimé Auteurs : Harish Agrawal, Auteur Année de publication : 2020 Article en page(s) : p. 122-132 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Béton armé -- Conservation et restauration
Construction -- Matériaux
Epoxydes
Imperméabilisation
Joints d'étanchéité
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).Index. décimale : 620.13 Matériaux de construction : pierre, ciment, béton, liants de Résumé : Concrete is a porous material which has the ability to absorb water and water-borne contaminants. Leaving the concrete exposed to external elements causes deterioration, and reduces the durability and life of the structure. The repair of concrete structures damaged by water or water borne chemicals is estimated to cost billions of money every year. To protect concrete structures and ensure its long serviceable life, waterproofing is important. There are two main ways to classify waterproofing systems based on their application : surface applied systems (i.e. coatings, sheet membranes, expanding clays) and integral systems (from within the concrete). Although advancements have been made in surface applied systems such as sheet membranes, the failures and limitations of these systems are still all too common and costly. The second system is a basic idea behind crystalline waterproofing which is to prevent the movement of water by plugging or blocking the natural pores, capillaries, and cracks present in concrete. It's a smart, self-sealing water-protection system that transforms concrete into a powerful water-resistant barrier. In this article, a background on the history of concrete waterproofing is described. Limitations of the existing membrane systems and the attributes of the smart crystalline waterproofing system are also described. Note de contenu : - Basement waterproofing : Positive waterproofing - Negative waterproofing - Alrady constructed basements - Injection grouting - Grout - Type of grouting
- BATHROOM/KITCHEN WATERPROOFING : Materials and methods - Common mistakes
- BALCONY/CHHAJJA WATERPROOFING : Two-component waterproofers - One-component waterproofers
- TERRACE GARDEN WATERPROOGING : Terrace garden - Important points - Terrace swimming pool waterproofing - Methods involved are basically based on epoxy systems
- SILICONE POLYMER HAIR CRACK WATERPROOFINGEn ligne : https://drive.google.com/file/d/1IavTDm9TBGtxJpgZ04jg7VASS9TFMArh/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34660
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