Functional additives for bio-mimic self cleaning coatings / Ravi Dara in PAINTINDIA, Vol. LVIII, N° 7 (07/2008)

[article]  inPAINTINDIA > Vol. LVIII, N° 7 (07/2008) . - p. 101-110 Titre : Functional additives for bio-mimic self cleaning coatings Type de document : texte imprimé Auteurs : Ravi Dara, Auteur ; Ghanshyam Jaiswal, Auteur Année de publication : 2008 Article en page(s) : p. 101-110 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Angle de contact Chimie biomimétique Hydrophobie Oléophobie Revêtement auto-nettoyant:Peinture auto-nettoyante Revêtements anti-graffitis Index. décimale : 667.9 Revêtements et enduits Résumé : Stain resistant and easy to clean coatings is in great demand and the focus of a lot of research activity globally. Additives based on fluoro (oleophobic) and silicone (hydrophobic) chemistry have been developed that provide easy to clean coatings. Being surface active they lower the surface energy of the coating thereby making the coating either difficult to stain in the first place or easy to clean. Such additives also have other benefits such as protecting the coating from micro-organisms, leading to improved sanitation and cleanliness, improved water and chemical resistance; anti-graffiti properties and giving the coating a new look for a longer time. Such addtives have found their source of inspiration from nature (biomimetic); particularly the lotus leaf which shows excellent hydrophobicity (a very high contact angle). This paper focuses on the chemistry of easy clean additives, how they work, and their use in coatings; highlight the need for a permanent effect, their advantages and current research in the field. Note de contenu : - Biomimic self cleaning coatings - The lotus lea - Contact angle hysteresis - FUNCTIONAL ADDITIVES : Nano TiO2 additive : photo catalysis (light driven combustion) - FLUORO ADDITIVES : FLUOROSURFACTANTS Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12106 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
010766	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Synthesis of polymeric dispersants from renewable DCO fatty acid and their multifunctional behavior in waterborne flat paint / Ravi Dara in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 4 (12/2009)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 4 (12/2009) . - p. 493-499 Titre : Synthesis of polymeric dispersants from renewable DCO fatty acid and their multifunctional behavior in waterborne flat paint Type de document : texte imprimé Auteurs : Ravi Dara, Auteur ; Ghanshyam Jaiswal, Auteur ; Girish Mirchandani, Auteur ; Randhir Parmar, Auteur ; Syed Haseebuddin, Auteur ; Gulzar Waghoo, Auteur ; Kumar Ghosh Swapan, Auteur Année de publication : 2009 Article en page(s) : p. 493-499 Note générale : Bibliogr. Langues : Américain (ame) Tags : Dehydrated  castor  oil  fatty  acids  (DCOFA)  Maleic  anhydride  Polymeric-dispersant  Pigment  dispersant  Rheology  modifier  Zeta  potential  Minimum  film-forming  temperature  (MFFT)  Waterborne  flat  paint Index. décimale : 667.9 Revêtements et enduits Résumé : Copolymers containing 50% dehydrated castor oil fatty acids (DCOFA) derived from renewable resources, were synthesized via free radical solvents less polymerization with maleic anhydride, styrene, and butyl acrylate. The copolymer was crosslinked further with polyethylene glycol 400 (PEG 400) to increase its molecular weight. The copolymers with and without crosslinking were then neutralized with sodium hydroxide to prepare polymeric dispersants DFCD1 and DFCD2 respectively in aqueous medium. It was observed via surface-tension measurement that both DFCD1 and DFCD2 transfer to the air–water interface before forming any aggregates, and the ease of forming the aggregates is in the order of DFCD1 > DFCD2. The efficacy of these dispersants was examined in the dispersion of the titanium dioxide pigment and conventional extenders like calcite, talc, and china clay using flow point and zeta potential measurements. The results reveal that DFCD2 improved the dispersing ability for the pigment and extenders studied. The performance of these polymeric dispersants was also studied and compared in waterborne flat paint as a rheology modifier and pigment-dispersing agent. The paint rheology profile and dE data indicate the superior performance of the paint containing dispersant DFCD2. When used in combination with conventional styrene-acrylic latex, DFCD1 and DFCD2 reduced the minimum film-forming temperature (MFFT) of the polymer latex. DOI : 10.1007/s11998-008-9156-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9156-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7692 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
011845	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 2 / 2)