▎ 摘　　要

Two types of 2D nanofillers, -zirconium phosphate (-ZrP) and graphene oxide (GO), were synthesized and incorporated into poly(vinyl alcohol) (PVA) with 1 wt % loading level at various -ZrP:GO (Z:G=5:1, 2:1, 1:1, 1:2, and 1:5) ratios. The resulting nanocomposites were tested for barrier properties by casting films from solution. The structure and morphology of -ZrP and GO were characterized by Fourier-transform infrared spectroscopy, atomic force microscope, scanning electron microscopy, transmission electron microscopy, and X-ray diffraction, which demonstrated successful preparation of exfoliated -ZrP and GO. The physical characteristics of the nanocomposite films, including thermal, mechanical, and gas barrier properties were investigated. The results indicated that the tensile strength, Young's modulus, and elongation at break of the PVA nanocomposite films with Z:G hybrid nanofiller improved compared to neat PVA. The glass transition temperature, melting temperature, and crystallinity also increased. Consequently there appears to be a synergistic effect with these two types of nanofillers that formed a specific macro structure of a wall. This macrostructure resulted in excellent O-2 gas barrier properties with the PVA/Z:G-5:1 nanocomposite films having the best performance. The PO2 of the PVA/Z:G-5:1 nanocomposite decreased from 1.835 x 10(-16) to 0.587 x 10(-16) cm(3)cmcm(-2) s(-1) Pa-1 compared with neat PVA. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46455.