Toward Transparent Nanocomposites Based on Polystyrene Matrix and PMMA-Grafted CeO2Nanoparticles
2011 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, Vol. 3, no 11, 4306-4314 p.Article in journal (Refereed) Published
The association of transparent polymer and nanosize d pigment particles offers attr active optical materials for various potential and existing applications. However, the particles embedded into polymers scatter light due to refractive index (RI) mismatch andre duce transp arency of the resulting compos ite material. In this stud y, optical composites ba sedon polys tyrene (PS ) matrix and poly( methyl methacrylate) (PMMA)-grafted CeO2hybridparticles were prepared. CeO2 nanoparticles with an aver age diameter of 18 ( 8 nm wereprecipitated by trea ting Ce(NO3)36H2O with urea in the presen ce of a polyme rizablesurfa ctant, 3-metha cyloxypropy ltrimetho xy silane. PMM A chains were grafted on the surfa ceof the nanopa rticles upon free radical in situ solution polymerization. While blend ing ofunm odi fied CeO2 parti cles with PS resulted in opaquefi lms, the trans parenc y of the compos itefi lms was remark ably enhanced when prepa red by PMMA -grafte d CeO2hybrid parti cles,parti cularly those havin g a PMMA thick ness of 9 nm. The impro vement in transparenc y ispresu mably due to the reduction in RI misma tch betwee n CeO2part icles and the PS m atrix wh en using PMM A chains at theinterface.
Place, publisher, year, edition, pages
American Chemical Society (ACS), 2011. Vol. 3, no 11, 4306-4314 p.
ceria, core shell nanoparticle, light scattering, index matching, polymerizable surfactan t, optical nanocomposites
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-82097DOI: 10.1021/am200983hOAI: oai:DiVA.org:liu-82097DiVA: diva2:557790