Bionanocomposites Preparation and Characterization: Dispersion of Surface-Modified ZnO Nanoparticles in Optically Active Poly(Amide-Imide) Derived from 3,5-Diamino-N-(4-Hydroxyphenyl)Benzamide and Amino Acid

Abstract

Bionanocomposites (BNCs) containing 4, 8 and 12% (w/w) modified ZnO nanoparticles (NPs) were successfully prepared by homogenous dispersion of these NPs in an optically active poly(amide-imide) (PAI) matrix through an ultrasonic process. PAI was synthesized via solution polycondensation of 3,5-diamino-N-(4-hydroxyphenyl) benzamide and N,N -(pyromellitoyl)-bis-L-phenylalanine diacid chloride at low temperature. The ZnO NPs were treated with γ -aminopropyltriethoxysilane (KH550) as a coupling agent to change the surface property of NPs from hydrophilic to hydrophobic nature for better dispersion in PAI matrix. The obtained BNCs were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray powder diffraction, atomic force microscopy (AFM), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) and thermogravimetry analysis. AFM studies of the BNCs suggest that the ZnO NPs of 20-50 nm in diameter were dispersed in polymer matrices. FE-SEM and TEM results also confirmed the formation of well-dispersed nano ZnO in the PAI matrix.

The chemistry concerned with the sonochemical-assisted synthesis of CeO$_{2}$/poly(amic acid) nanocomposites

“…8 In our recent studies, the straight application of the sonochemical process by employing the ultrasonic cavities in surface treatment of nanoparticles and also in nanocomposite fabrication was performed. 9,10 By using a sonochemical-assisted method different nanostructures like metal, metal oxide, and carbon nanotubes were modified to gain better dispersion properties for preparing new nanocomposites. Therefore, in this study, we report the synthesis of well-formed surface-modified cerium oxide nanoparticles (average size 50-60 nm) immobilized in the PAA matrix.…”

Studies on Preparation and Microstructure Characterization of Novel Composites Based on Functionalized Multiwalled Carbon Nanotubes and Chiral Poly(ester-imide) Containing S-Valine Linkages

“…Ultrasonic irradiation, has been extensively utilized in chemical synthesis and preparation of nanocomposites. Most sonochemical effects could be ascribed to cavitation, the growth and explosive collapse of microbubbles, as the ultrasonic wave passes through a liquid medium [20][21][22][23][24] .…”

Study on constructional design and structural analysis of poly(amide-imide)/ZnO nanocomposites containing pyromellitoyl-bis-l-isoleucine moieties

“…25 We have focused on the synthesis of different kinds of polycondensation polymers and applications of them as matrices for NC preparations. [26][27][28] Among the prepared polymers, PAIs due to the favorable balance of functionality and properties seem to be better candidate for NC technologies.…”