Preparation of UV reactive montmorillonite and characterization of its nanocomposites with poly(vinyl alcohol)

Abstract

A cation‐exchanged montmorillonite clay is prepared as filler material with high dispersibility, that should act as Fe3+‐donor for photochemical crosslinking of PVA/Fe3+‐MMT materials with filler contents of up to 50 wt % with regard to the polymer matrix. Hence, no organic photoinitiators and hazardous compounds are utilized. This material may be considered environmentally benign and could be applied in the field of food packaging or for biomedical applications. Upon UV exposure of liquid PVA/Fe3+‐MMT dispersion samples, a significant change of the refractive index is determined and the absorption at 360 nm decreased. This indicates the transition of Fe3+ to Fe2+, which initiates a radical crosslinking mechanism. A homogenous distribution and parallel orientation of the modified clay particles is revealed by SEM measurements. The solubility behavior of the PVA/Fe3+‐MMT composite materials in deionized water, changes considerably due to the high filler content and UV‐induced crosslinking, resulting in gel contents exceeding 90 wt %. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

Preparation of a Water-Based Photoreactive Azosulphonate-Doped Poly(Vinyl Alcohol) and the Investigation of Its UV Response

“…As FeCl 3 is employed as flocculation agent for waste water treatment, it is considered environmentally benign and poses an alternative to chromate doping of PVA [17,20]. Schauberger took up and continued the idea of iron doping of PVA [16,21]. Here, Fe 2+ was intercalated in montmorillonite and PVA/montmorillonite composites were UV-irradiated.…”

Review on the Preparation, Structure and Property Relation of Clay-Based Polymer Nanocomposites

“…In most polymer-clay nanocomposites, the most preferred material as a filler is montmorillonite (MMT) owing to its layered structure and rich intercalation chemistry (Osman et al, 2017;Martino et al, 2017;Chen et al, Quaternized, 2017;Hajibeygi et al, 2016;Penaloza et al, 2015;Marchante and Beltrán, 2015;Spoljaric et al, 2014;Valandro et al, 2013;Schauberger et al, 2013). An individual clay platelet in an MMT clay structure is about one nanometer thick.…”