Composite films based on salicylic acid-layered zinc hydroxide and polyvinyl alcohol: Preparation, characterization, properties and potential applications. (February 2021)

• Record Type: Journal Article
• Authors: Ruiz, Christhy V.; López-González, Mar; Giraldo, Oscar
• Is Part Of: Polymer testing. Volume 94(2021)
• Publication Date: 2021-02
• Subjects: Hybrid material -- Salicylic acid -- Layered zinc hydroxide acetate -- Poly(vinyl) alcohol -- Composite films -- Reinforcement effect -- Stress; Polymers -- Testing -- Periodicals; Polymères -- Tests -- Périodiques; 620.1920287
• DOI: 10.1016/j.polymertesting.2021.107057
• Languages: English
• ISSNs: 0142-9418

Abstract

Abstract: Composite films of Polyvinyl alcohol (PVA) and hybrid materials based on salicylic acid –layered zinc hydroxide acetate (ZHA-SA) using zinc hydroxide acetate (ZHA) as host matrix were obtained by the casting method. The resulting composite films were characterized by FT-IR, X-ray diffraction, scanning electron microscopy (SEM) and atomic force microscopy (AFM) evidencing the incorporation of the layered materials in PVA matrix with relatively smooth and orderly surfaces. A significant reduction in the crystallinity of neat PVA film and a slight increase in transport coefficients of oxygen through the composite films have been observed. This behaviour has been attributed to a high compatibility and adhesion between the fillers and polymeric matrix. Evaluation of the mechanical properties, in terms of stress, revealed that a low content of fillers (1.0 wt %) were able to increase the response of PVA composites by ~63% with the addition of ZHA, and ~45% with ZHA-SA. The results demonstrated the potential application of ZHA and ZHA-derived hybrid material in the preparation of multifunctional polymer composites to be used in packaging food systems. Highlights: Polymer composites based on PVA and zinc hydroxide acetate were investigated. The interaction occurs through H-bonding owing the hydrophilic character of both components. The crystallinity and barrier properties of PVA were affected by filler addition. The tensile strength of polymer enhanced 63% only with 1 wt% of filler.