▎ 摘　　要

A new series of boric acid (BA) induced cross-linked poly(vinyl alcohol-co-ethylene) (EVOH)/graphene oxide (GO) nanocomposite (EVOH/BA/GO) films are prepared using different amount of GO and BA with respect to EVOH. The EVOH/BA/GO nanocomposites are respectively coated on nylon films and stainless steel substrates by a typical spray coating method, followed by thermal and hydrazine vapor treatment for gas barrier and corrosion studies. The Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy analyses confirm the formation of cross-linked nanocomposite through the formation of BeOeC bond. The field emission scanning electron microscopy analysis indicates the formation of homogeneous structure for these nanocomposites. The storage modulus (at 25 degrees C) and elastic modulus of EVOH/15BA/5GO-coated film with 15% BA and 5% GO are enhanced by 280 and 60%, respectively, in comparison to nylon film. EVOH/15BA/5GO-coated nylon film exhibits dramatic reduction of hydrogen (6.9) and oxygen gas (1.5) transmission rates (cc/m(2)center dot d center dot atm) than pure nylon film. In addition, EVOH/15BA/5GO-coated stainless steel shows an ultralow corrosion current (0.294 mu A/cm(2)) and corrosion rate (3.43 x 10(-3) mm/year) than steel. A comparative study between EVOH/BA/GO and EVOH/GO is performed to examine the effect of the cross-linker on the different physical properties. (C) 2018 Elsevier Ltd. All rights reserved.