Novel Poly(vinyl alcohol)/Clay Nanocomposite Film Prepared by the Heterogeneous Saponification of Poly(vinyl acetate)/Clay Nanocomposite Film

Abstract

A novel PVA/clay (MMT) film is prepared for the first time based on the saponification of the PVAc/MMT film in the presence of heterogeneous conditions. With the help of optical microscopy, the characteristics and surface morphology of the saponified PVA/MMT film is confirmed. It is found to contain black MMT nanoparticles in PVAc films as the content of MMT increased. According to atomic force microscopy results, PVAc/MMT films shows unexpected surface roughness owing to the slow progress of the saponification reaction in the presence of MMT contents in the PVAc matrix. The thermal stability of the PVA/MMT film is measured using thermal gravimetric analyses. The results indicate that thermal stability increases significantly when the MMT concentration increases. The entire structure of the PVA/MMT nanocomposite has been elucidated using XRD. To prove the differences between the PVAc/MMT and the PVA/MMT films, XRD measurements and Fourier transform Infrared spectroscopy analyses are utilized.

A Novel Fabrication of Heterogeneous Saponified Poly(Vinyl Alcohol)/Pullulan Blend Film for Improved Wound Healing Application

“…Meanwhile, the saponified PVAc film showed a -OH stretch in the range of 3000-3600 cm −1 that originated from both intermolecular and intramolecular hydrogen bonds, which meant the acetyl group (-OCOCH 3 ) of PVAc film turned to a hydroxyl group (-OH) due to the reaction with alkaline solution during heterogeneous saponification, which revealed that PVA was obtained from PVAc. A similar result was also found in our previous studies [20,27]. Figure 4b,c also show a similar trend regarding the saponified films, but the peak intensity varied depending on the PVAc/PULL ratio, which might be due to the change in material property.…”

“…A similar result was also found in our previous studies [20,27]. Figure 4b,c also show similar trend regarding the saponified films, but the peak intensity varied depending o the PVAc/PULL ratio, which might be due to the change in material property.…”

“…PVAc powder was produced using suspension polymerization, as per our previous study [27]. The prepared PVAc/PULL was fabricated by a casting/solvent evaporation process.…”