Synthesis and characterization of pyroelectric nanocomposite formed of BaTiO3 nanoparticles and a smectic liquid crystal matrix

This article combines the properties of both types of ferroelectric materials (inorganic ceramic and liquid crystal), to obtain a plastic composite exhibiting high polarization. To realize this target, a liquid crystalline nanocomposite was prepared comprising a polymer (PM6R10) and a monomer (M6R6) mixture in a 2 : 1 ratio, PM10M6 and BaTiO3 nanoparticles (NpBT). To prepare the nanomaterials, we used the calcinations method of a gel precursor. By studying the dependence of the morphological and structural characteristics with the annealing time at 1000°C, we obtained a product that possess the properties suitable for the purpose of this study. Then to PM10R6, NpBT were added at a concentration of 5%, with and without oleic acid (OA). Measurement of the pyroelectric signal reveals that the addition of NpBT significantly increases the pyroelectric response of the material compared to the original composite. However, when adding OA as the compatibilizer, the pyroelectric signal and therefore their polar property practically disappears.

[1]  L. Dupont,et al.  BaTiO3 ferroelectric nanoparticles dispersed in 5CB nematic liquid crystal: Synthesis and electro-optical characterization , 2010 .

[2]  J. Zhang,et al.  Optical properties and applications of hybrid semiconductor nanomaterials , 2009 .

[3]  Sungho Yoon,et al.  The simple and facile methods to improve dispersion stability of nanoparticles: different chain length alkylcarboxylate mixtures. , 2009, Journal of colloid and interface science.

[4]  Chia‐Chen Li,et al.  An efficient approach to derive hydroxyl groups on the surface of barium titanate nanoparticles to improve its chemical modification ability. , 2009, Journal of colloid and interface science.

[5]  I. Kityk,et al.  UV-excited piezo-optical effects in oxide nanocrystals incorporated into PMMA matrices , 2008 .

[6]  J. Móczó,et al.  Polymer micro and nanocomposites: Structure, interactions, properties , 2008 .

[7]  Jiaguang Han,et al.  Dielectric response in ferroelectric BaTiO3 , 2008 .

[8]  B. Y. Ahn,et al.  Wet chemical synthesis of redispersible crystalline BaTiO3 in organic medium , 2008 .

[9]  Yoshio Kobayashi,et al.  Fabrication and dielectric properties of the BaTiO3–polymer nano-composite thin films , 2008 .

[10]  Jing Jiang,et al.  Polyaniline/magnetic ferrite nanocomposites obtained by in situ polymerization , 2008 .

[11]  I. Szafraniak,et al.  Dielectric and pyroelectric response of PVDF loaded with BaTiO3 obtained by mechanosynthesis , 2007 .

[12]  R. Dabrowski,et al.  Antiferroelectric liquid crystals with induced intermediate polar phases and the effects of doping with carbon nanotubes , 2007 .

[13]  Liqiu Wang,et al.  Wet routes of high purity BaTiO3 nanopowders , 2007 .

[14]  B. Su,et al.  A new series of optoelectronic nanocomposites: CMI-1 mesoporous core/ZnS shell , 2007 .

[15]  M. Pattabi,et al.  Photoluminescence study of PVP capped CdS nanoparticles embedded in PVA matrix , 2007 .

[16]  T. Mandal.  Characterization of tetragonal BaTiO3 nanopowders prepared with a new soft chemistry route , 2007 .

[17]  B. Martorana,et al.  Preparation of micrometric silver filaments for polymeric pressure sensors , 2006 .

[18]  Sie Chin Tjong,et al.  STRUCTURAL AND MECHANICAL PROPERTIES OF POLYMER NANOCOMPOSITES , 2006 .

[19]  M. Kakimoto,et al.  Polymer-Ceramic Nanocomposites Based on New Concepts for Embedded Capacitor , 2006 .

[20]  Frans Baeten,et al.  Barium titanate characterization by differential scanning calorimetry , 2006 .

[21]  S. Curran,et al.  Enhanced rectification through polymer-gold nanoparticle interaction , 2005 .

[22]  E. Kim,et al.  The synthesis and dielectric study of BaTiO3/polyimide nanocomposite films , 2005 .

[23]  P. K. Fung,et al.  A novel fabrication of ionic polymer-metal composites (IPMC) actuator with silver nano-powders , 2005, The 13th International Conference on Solid-State Sensors, Actuators and Microsystems, 2005. Digest of Technical Papers. TRANSDUCERS '05..

[24]  Chia‐Chen Li,et al.  Colloidal stability of CuO nanoparticles in alkanes via oleate modifications , 2004 .

[25]  E. Soto-Bustamante,et al.  Ferroelectricity in Achiral Liquid‐Crystal Systems , 2004 .

[26]  W. Haase,et al.  X-ray investigations on some liquid crystalline methacrylic polymers with ω-hexyloxysalicylaldimine side groups carrying p -alkyl or p -alkyloxy terminal substituents , 2002 .

[27]  W. J. Weber,et al.  Amorphization and recrystallization of the ABO3 oxides , 2002 .

[28]  R. Vaia,et al.  Nanophase and Nanocomposite Materials IV , 2002 .

[29]  W. Haase,et al.  Synthesis and characterization of a novel liquid crystalline side chain metallopolymer , 1998 .

[30]  L. Blinov,et al.  Antiferroelectric achiral mesogenic polymer , 1996 .

[31]  L. Blinov,et al.  Antiferroelectric behaviour of achiral mesogenic polymer mixtures , 1996 .

[32]  L. Beresnev,et al.  Dielectric and pyroelectric investigations on the domain mode process in high Ps-FLC Materials , 1996 .

[33]  T. Marks,et al.  Structural and electronic anisotropy in polycrystalline compactions of the high-Tc superconductor EuBa2Cu3O7−δ , 1988 .