The influence of the size and surface modification of TiO2 nanoparticles on the rheological properties of alkyd resin

Abstract

IzvodSferne čestice TiO 2 različitih veličina dispergovane su u alkidnoj smoli. Površinska modifikacija nanočestica TiO 2 izvedena je propil galatom i lauril galatom. Ispitivan je uticaj veličine nanočestica TiO 2 , koncentracije, kao i vrste površinske modifikacije na reološka svojstva alkidne smole. Dobijeno je da je viskoznost pripremljenih disperzija veća od viskoznosti čiste smole, da raste sa smanjenjem prečnika čestica i opada sa povećanjem frekvencije. Površinski modifikovane čestice imaju veći uticaj na viskoznost alkidne smole nego nemodifikovane zbog povećanja efektivnog zapreminskog udela čestica u disperziji. Za najmanju koncentraciju TiO 2 viskoznost je veća kada je modifikacija izvršena lauril galatom, dok sa povećanjem koncentracije, zbog manje disperzione stabilnosti čestica modifikovanih propil galatom, dolazi do njihove aglomerizacije i naglog povećanja viskoznosti.

Preparation and properties of short oil alkyd resin/TiO2 nanocomposites based on surface modified TiO2 nanoparticles

“…In the case of TiO 2 NPs surface modified with different gallates, the bond between gallates and surface Ti atoms of TiO 2 was formed through the adjacent OH groups from the benzene ring, by creating bridging complexes . This is in good agreement with our previous results . Furthermore, XRD analysis of all modified TiO 2 NPs revealed that after modification of TiO 2 NPs with gallates or DHBAOA, the crystal structure and crystallite size of TiO 2 NPs were not changed .…”

“…In our previous articles, we have prepared TiO 2 NPs surface modified with different esters of gallic acid and investigated their influence on the properties of different polymer NCs: poly(methyl methacrylate)/TiO 2 NCs , polystyrene/TiO 2 NCs , and epoxy resin/TiO 2 NCs . We have also examined the influence of TiO 2 NPs surface modified with different gallates or imine based on 3,4‐dihydroxybenzaldehyde and oleylamine (DHBAOA) on the properties of long oil soy alkyd resin‐based coating and dispersions made from these NPs and soy alkyd resin . The results presented in these articles revealed that the presence of gallate or imine coupling agent can improve compatibility between polymer matrix and NPs and that dispersability of TiO 2 NPs surface modified with gallates in polymer matrix is influenced by the hydrophobic part length of gallic acid esters.…”

Effect of surface modified TiO2 nanoparticles on thermal, barrier and mechanical properties of long oil alkyd resin-based coatings

“…The influence of different nano-sized pigments on the properties of alkyd-based NCs was extensively investigated in the literature [26][27][28][29][30][31][32][33][34][35][36][37]. It has been shown that application of zinc oxide (ZnO) as nanosized pigment improves mechanical and thermal properties [26] and corrosion resistance [27] of alkydbased coatings.…”

“…It has been shown that application of zinc oxide (ZnO) as nanosized pigment improves mechanical and thermal properties [26] and corrosion resistance [27] of alkydbased coatings. Furthermore, the presence of titanium dioxide (TiO 2 ) NPs affects the rheological properties of alkyd resin [28], improves corrosion resistance [29,30] and hardness of alkyd coatings [29], and can be applied for the preparation of coatings with antibacterial properties [31]. Also, hematite (Fe 2 O 3 ) NPs are proven to be useful nano-pigment which enhances mechanical and UV blocking properties [32] and corrosion resistance [32,33] of alkydbased waterborne coatings.…”

“…Alkyd paint prepared using molybdenum oxide (MoO 3 ) NPs showed good antibacterial properties against pathogenic bacteria [37]. In our previous studies, we have synthesized and examined properties of NCs based on epoxy resin and TiO 2 NPs surface modified with propyl, hexyl and lauryl gallate [38], as well as the influence of the size of TiO 2 nanoparticles, their concentration and type of the surface modification on the rheological properties of alkyd resin [28]. Since there is constantly increasing demand for developing environmentally friendly materials and taking into account that alkyd resins are one of the most applied resins and TiO 2 is one of the most applied pigment in coating industry, in the present study we have made an effort to prepare novel alkydbased NCs with improved properties, by utilizing differently surface modified TiO 2 NPs and alkyd resin based on vegetable oil.…”