Polyarylene Ether Nitrile and Barium Titanate Nanocomposite Plasticized by Carboxylated Zinc Phthalocyanine Buffer

Abstract

Barium titanate (BT) and polyarylene ether nitrile (PEN) nanocomposites with enhanced dielectric properties were obtained by using carboxylatedzinc phthalocyanine (ZnPc-COOH) buffer as the plasticizer. Carboxylated zinc phthalocyanine, prepared through hydrolyzing ZnPc in NaOH solution, reacted with the hydroxyl groups on the peripheral of hydrogen peroxide treated BT (BT-OH) yielding core-shell structured BT@ZnPc. Thermogravimetric analysis (TGA), transmission electron microscopy (TEM), TEM energy dispersive spectrometer mapping, scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared (FTIR) demonstrated successful preparation of BT@ZnPc. The fabricated BT@ZnPc was incorporated into the PEN matrix through the solution casting method. Rheological measurements demonstrated that the ZnPc-COOH buffer can improve the compatibility between BT and PEN effectively. With the existence of the ZnPc-COOH buffer, the prepared BT@ZnPc/PEN nanocomposites exhibit a high dielectric constant of 5.94 and low dielectric loss (0.016 at 1000 Hz). BT@ZnPc/PEN dielectric composite films can be easily prepared, presenting great application prospects in the field of organic film capacitors.

Fabrication of BaTiO3-Loaded Graphene Nanosheets-Based Polyarylene Ether Nitrile Nanocomposites with Enhanced Dielectric and Crystallization Properties

“…In addition, it worth noting that when the BT@ZnPc-GO-1 nanoparticles are added to 15 wt % this indicates the amount of graphene is only 7.5 wt % , and the dielectric constant of the nanocomposites is 6.2. According to previous reports [20], when the amount of ZnPc@BT is added as high as 30%, the dielectric constant of the composites is still about 6.0. This reveals that a significant increase in dielectric constant is achieved with low additions of graphene, which is due to the fact that heterojunction between the conductor and the ferroelectric increases the dielectric constant of the composites [29].…”

“…The characteristic absorption peak appearing at 1630 and 1384 cm −1 of all samples belongs to the carboxyl group, and the absorption peak at 2853 and 2925 cm −1 belongs to C-H. Besides, the absorption peak at 1745 cm −1 in the curve of BT@ZnPc presents the formation of the ester bond in BT@ZnPc, indicating a reaction has occurred between the carboxyl from the ZnPc-COOH and the hydroxyl on the peripheral of BT-OH [20]. In addition, Figure 4b-d show the XPS spectrums of the prepared BT@ZnPc-GO nanoparticles.…”

“…This result is mainly due to the fact that the surface functionalized BT nanoparticles are uniformly attached onto the surface of GO nanoparticles to form a new relatively stable hybrid, which effectively promotes its dispersion in PEN matrix. Meanwhile, the organic zinc phthalocyanine-functionalized BT nanoparticles can effectively promote the compatibility of BT and PEN matrix [20]. All these results indicate that a new method for preparing high-performance PEN-based nanocomposites has been established to fabricate film-capacitor assemblies for use in high temperature environments.…”

“…BT@ZnPc was prepared according to the previous work, BT@ZnPc was prepared by mixed for sonication in N-methyl-2-pyrrolodone (NMP) for 3 h and the filtered mixture was treated at 200 • C for 4 h [20]. Calcium chloride (CaCl 2 ) and potassium carbonate (K 2 CO 3 ) were purchased from Tianjin BODI chemicals, Tianjin, China.…”

“…Afterwards, 1 g PEN was added in the dispersion and stirred continuously for about 20 min at 80 • C until it was completely dissolved. After that, the mixture obtained was casted on a horizontal glass and dehydrated under a preset program based on the previous method [20]. After being cooled down to room temperature, BT@ZnPc-GO/PEN nanocomposite films were successfully fabricated.…”