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Saturday, 21 September 2019
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Raw materials & technologies, Applications

Modification of titanium dioxide nanoparticles as effective way for encapsulation

Wednesday, 18 November 2015

Encapsulation of inorganic nanoparticles by polymers is one of the interesting research topics that lead to the synthesis of nanocomposites.

Iranian researchers prepared hybrid latex particles with core-shell nanostructure via semi-batch emulsion polymerisation. Source: Katja Hinsenbrock/pixelio.de
Iranian researchers prepared hybrid latex particles with core-shell nanostructure via semi-batch emulsion polymerisation. Source: Katja Hinsenbrock...

These nanocomposite materials comprise the properties of both organic polymer and inorganic nanoparticles.

Characterising the products of each step

Hybrid latex particles with core–shell nanostructure were prepared via semi-batch emulsion polymerisation. Copolymers of (methyl methacrylate-butyl acrylate) and (dimethylaminoethyl methacrylate-butyl acrylate-acrylic acid) were formed as the inner and outer layers, respectively on the surface of modified TiO2 nanoparticles as the core. In order to create compatibility between inorganic and polymeric phases, modification of TiO2 nanoparticles was performed with glycidyl methacrylate with an optimised procedure for the first time and then emulsion polymerisation was carried out. The products of each step were fully characterised.

Analyses proved formation of encapsulated particles

The results of dynamic light scattering, TEM and SEM analyses proved the formation of encapsulated hybrid latex particles. DLS and SEM data revealed that the sizes of nanocomposite particles vary between 85 and 120 nm for 0–5 wt% of the modified TiO2 nanoparticles. Physico-mechanical properties of the obtained nanocomposite films were studied by DMTA. It was found that using only 3 wt% of modified TiO2 improved those properties of resulting films remarkably.

The study is published in: Progress in Organic Coatings, Volume 88, November 2015, Pages 310-315.

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