Properties and structural characterization of oxidized starch/PVA/α‐zirconium phosphate composites

Abstract

Two series of composites, i.e., polyvinyl alcohol (PVA)/oxidized starch (OST)/exfoliated a-zirconium phosphate (POST-ZrPn) and PVA/starch (ST)/exfoliated a-zirconium phosphate (PST-ZrPn), were fabricated using a casting and solvent evaporation method. The composites were characterized by Fourier transform infrared spectroscopy (FT-IR), thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), wide-angle X-ray diffraction (XRD), scanning electron microscopy (SEM), tensile testing, and moisture uptake. Compared with PSTZrPn, POST-ZrPn films with the same component ratio showed higher tensile strength (r b ), lower elongation at break (e b ) and improved water resistance. Additionally, in the POST-ZrPn series, r b and e b increased with an increase in a-zirconium phosphate (a-ZrP) loading; however, higher a-ZrP loads resulted in the aggregation of a-ZrP particles. Compared with POST-ZrP0, the values for r b , e b , and water resistance of POST-ZrP3, containing 1.5 wt % a-ZrP, were increased by 128.8%, 51.4%, and 30.2%, respectively.

Preparation and properties of chitosan/poly (vinyl alcohol) nanocomposite films reinforced with rod-like sepiolite

“…It indicated that SP interacted with polymers matrix, and the hydrogen bonding between PVA and CS was partially destructed. A quite similar tendency was reported for exfoliated a-zirconium phosphate introducing into the PVA/starch matrix [9]. It can also be seen that the elongation at break of nanocomposites increased with an increase in SP loading from 0 to 2 wt %, while the 2D clay platelet leads to the drastic decrease in the elongation at break of the resulting composites at high loading [5].…”

“…The contact angle (CA) of a liquid on the film surface was measured using a Kruss DSA 100 (Kruss, Hamburg, Germany) apparatus at ambient temperature. The moisture uptake (MU) of the samples was determined at RH of 76% by the method of Yang et al [9].…”

Where do poly(vinyl alcohol) based membranes stand in relation to Nafion® for direct methanol fuel cell applications?

“…Additionally, in the POST-ZrPn series, rb and eb increase with an increase in a-zirconium phosphate (a-ZrP) loading; however, higher a-ZrP loads resulted in the aggregation of a-ZrP particles. Compared with POST-ZrP0, the values for rb, eb, and water resistance of POST-ZrP3, containing 1.5 wt % a-ZrP, are increased by 128.8%, 51.4%, and 30.2%, respectively [102]. [103].…”

Recent advances in starch, polyvinyl alcohol based polymer blends, nanocomposites and their biodegradability

“…Both tensile strength and water resistance were improved. Yang et al (2010) fabricated oxidized starch/PVOH/exfoliated ␣-zirconium phosphate (␣-ZrP) composites using a solution casting method. ␣-ZrP exhibits great advantages over MMT clay, including a much higher purity and surface energy, ease of intercalation, and ease of exfoliation.…”