Preparation of TiO2 coated silicate micro-spheres for enhancing the light diffusion property of polycarbonate composites

Abstract The TiO2 coated silicate micro-spheres (SMS) core–shell particles (SMS@TiO2) were synthesized using the sol–gel reaction followed by calcination. The SMS@TiO2 particles were used to enhance the light diffusion property of polycarbonate (PC) composites. Our experimental analysis shows that the TiO2 was coated on the SMS particles and the optimum parameters of the reaction were 4:1 of the Si/Ti molar ratio and 500 °C of the calcination temperature. The UV–Vis spectra indicate that SMS@TiO2 can absorb or hinder the UV light, which may prolong the service life of PC light diffusion materials. Compared to that of PC composites physically mixed with SMS + TiO2, the haze of the PC/SMS@TiO2 composites was little affected, while the transmittance was obviously enhanced, which can be increased from 55.5% for PC/TiO2/SMS to 70.3% for PC/SMS@TiO2 with only 0.6 wt% filler loading.

[1]  Siddaramaiah,et al.  Polycarbonate/molybdenum disulfide/carbon black composites: Physicomechanical, thermal, wear, and morphological properties , 2012 .

[2]  T. Burkhart,et al.  Optical Properties of Particle-Filled Polycarbonate, Polystyrene, and Poly(methyl methacrylate) Composites , 2010 .

[3]  A. Singh,et al.  Evidence for in situ graft copolymer formation and compatibilization of PC and PMMA during reactive extrusion processing in the presence of the novel organometallic transesterification catalyst tin(II) 2-ethylhexanoate{ , 2012 .

[4]  J. Banfield,et al.  UNDERSTANDING POLYMORPHIC PHASE TRANSFORMATION BEHAVIOR DURING GROWTH OF NANOCRYSTALLINE AGGREGATES: INSIGHTS FROM TIO2 , 2000 .

[5]  C. Peden,et al.  Insights into Photoexcited Electron Scavenging Processes on TiO2 Obtained from Studies of the Reaction of O2 with OH Groups Adsorbed at Electronic Defects on TiO2 (110) , 2003 .

[6]  R. Puteh,et al.  Optical and Physical Properties of Methyltrimethoxysilane Transparent Film Incorporated with Nanoparticles , 2012 .

[7]  M. Piumetti,et al.  Study of the surface acidity of TiO2/SiO2 catalysts by means of FTIR measurements of CO and NH3 adsorption , 2007 .

[8]  I. Chu,et al.  Effects of heat treatment on the properties of poly(methyl methacrylate)/ silica hybrid materials prepared by sol-gel process , 2001 .

[9]  J. Sheng,et al.  Light-scattering study of the morphology, structure, and mechanical properties of high impact polystyrene alloys with poly(cis-butadiene) rubber , 2009 .

[10]  D. R. Paul,et al.  Blends of high temperature copolycarbonates with bisphenol-A-polycarbonate and a copolyester , 2004 .

[11]  Bai Yang,et al.  High refractive index organic–inorganic hybrid coatings with TiO2 nanocrystals , 2008 .

[12]  K. Sekiya,et al.  Synthesis and Optical Property Analysis of Novel Anisotropic Light Diffusing Film , 2012 .

[13]  Charles C. Han,et al.  Morphology evolution of a bisphenol A polycarbonate/poly (styrene-co-acrylonitrile) blend under shear and after shear cessation , 2012 .

[14]  M. Gaur,et al.  Investigation of optical and thermally stimulated properties of SiO2 nanoparticles‐filled polycarbonate , 2012 .

[15]  Lee Wook Jang,et al.  Polystyrene/bisphenol A polycarbonate molecular composite by in situ polymerization. I. Preparation and characterization , 2000 .

[16]  Andrei Veniaminov,et al.  Diffusional enhancement of holograms: phenanthrenequinone in polycarbonate , 2002 .

[17]  B. B. Khatua,et al.  Preparation of highly exfoliated and transparent polycarbonate/clay nanocomposites by melt blending of polycarbonate and poly(methyl methacrylate)/clay nanocomposites , 2012 .

[18]  D. Zhao,et al.  Synthesis of ordered mesoporous bifunctional TiO2–SiO2–polymer nanocomposites , 2009 .

[19]  Jun Chen,et al.  UV Raman spectroscopic study on TiO2. I. Phase transformation at the surface and in the bulk. , 2006, The journal of physical chemistry. B.

[20]  G. Heinrich,et al.  Analysis of agglomerate dispersion mechanisms of multiwalled carbon nanotubes during melt mixing in polycarbonate , 2010 .

[21]  Yong-liang Yu,et al.  Homogeneous synthesis of SiO2@TiO2 nanocomposites with controllable shell thickness and their enhanced photocatalytic activity. , 2013, Dalton transactions.

[22]  Tao Wang,et al.  Phase-selectivity photocatalysis: a new approach in organic pollutants' photodecomposition by nanovoid core(TiO2)/shell(SiO2) nanoparticles. , 2008, Chemical communications.

[23]  Xuesi Chen,et al.  Melt stereocomplexation from poly(l-lactic acid) and poly(d-lactic acid) with different optical purity , 2013 .

[24]  P. Kamat,et al.  TiO2-graphene nanocomposites. UV-assisted photocatalytic reduction of graphene oxide. , 2008, ACS nano.

[25]  K. Suh,et al.  Fabrication of monodisperse polymer/silica hybrid microparticles for improving light diffusion properties , 2012, Macromolecular Research.

[26]  Wen-Tuan Wu,et al.  Surface textured molybdenum zinc oxide for light diffusion enhancement , 2009 .

[27]  Yaojie Sun,et al.  A facile fabrication of light diffusing film with LDP/polyacrylates composites coating for anti-glare LED application , 2013 .

[28]  O. Matsuoka,et al.  Chain structures of surface hydroxyl groups formed via line oxygen vacancies on TiO2(110) surfaces studied using noncontact atomic force microscopy. , 2005, The journal of physical chemistry. B.

[29]  Xianzhi Fu,et al.  Hierarchical macro/mesoporous TiO2/SiO2 and TiO2/ZrO2 nanocomposites for environmental photocatalysis , 2009 .

[30]  S. Irusta,et al.  Silver nanowires/polycarbonate composites for conductive films , 2012 .

[31]  R. French,et al.  Multiple scattering from rutile TiO2 particles , 2000 .

[32]  Geun-Hyung Kim,et al.  Analysis of thermo-physical and optical properties of a diffuser using PET/PC/PBT copolymer in LCD backlight units , 2005, Displays.

[33]  M. Rigdahl,et al.  Angle-resolved light scattering from textured injection-molded plastics , 2012 .

[34]  Jun Zhang,et al.  A gradient structure formed in injection-molded polycarbonate in situ hybrid composites and its corresponding performances , 2004 .

[35]  Bradley B. Rupp,et al.  Synthesis and characterization of transparent alumina reinforced polycarbonate nanocomposite , 2010 .

[36]  V. John,et al.  Magnetic TiO2–SiO2 hybrid hollow spheres with TiO2 nanofibers on the surface and their formation mechanism , 2012 .

[37]  Alberto D'Amore,et al.  PMMA/PC Blends: Effect of Mixing Conditions on Compatibility , 2007 .

[38]  W. Cook,et al.  Epoxy as a reactive plasticizer for improving polycarbonate processibility , 2011 .

[39]  Xiaomin Li,et al.  Aerogel based SiO2–TiO2 hybrid photoanodes for enhanced light harvesting in dye-sensitized solar cells , 2012 .

[40]  Zhe Zhou,et al.  Cellulose nanocrystals as organic nanofillers for transparent polycarbonate films , 2013, Journal of Nanoparticle Research.

[41]  Jincai Zhao,et al.  Photooxidative N-demethylation of methylene blue in aqueous TiO2 dispersions under UV irradiation , 2001 .