Pectin-based composite film: Effect of corn husk fiber concentration on their properties. (15th May 2017)

• Record Type: Journal Article
• Authors: Bernhardt, Dana C.; Pérez, Carolina D.; Fissore, Eliana N.; De'Nobili, Maria D.; Rojas, Ana M.
• Is Part Of: Carbohydrate polymers. Volume 164(2017)
• Page Start: 13
• Page End: 22
• Publication Date: 2017-05-15
• Subjects: AA ascorbic acid -- aW water activity -- CHF water insoluble corn husk fiber -- DPPH 2, 2-diphenyl-1-picrylhydrazyl radical scavenging assay -- DSC differential scanning calorimetry -- DTG time derivative of thermal gravimetry -- ERH equilibrium relative humidity -- FRAP ferric reducing antioxidant power -- FTIR Fourier Transformed Infrared Spectroscopy -- LMP low methoxyl pectin -- RH relative humidity -- SEM Scanning Electron Microscopy -- Tg glass transition temperature -- TGA thermal gravimetric analysis -- WVP water vapor permeability; Arabinoxylans (PubChem CID: 6438923) -- Carotene (PubChem CID: 5280489) -- Lignin (PubChem CID: 73555271) -- Polygalacturonic acid (PubChem CID: 445929); Corn husk fiber -- Pectin composite film -- Antioxidant capability -- Water vapor permeability -- Tensile strength -- Surface properties; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2017.01.031
• Languages: English
• ISSNs: 0144-8617

Abstract

Graphical abstract: Highlights: Water insoluble corn husk fiber (CHF) level was evaluated in LMP based composites. 5%-CHF low methoxyl pectin (LMP) based composites had the highest (44°) contact angle. Antioxidant CHF loaded at 5%-level gave the lowest WVP and highest film resistance. 5%-CHF composites showed similar deformability than the 0%-8% CHF LMP films. CHF co-extracted with phenolics and carotenes is promising for antioxidant composites. Abstract: Considering the polysaccharide composition and 32% of crystallinity of the water insoluble fiber extracted from corn husk (CHF) agricultural residue, its filler performance as water vapor permeability (WVP) and mechanical modifier in edible films based on commercial low methoxyl pectin (LMP) was evaluated (0, 1, 3, 5, 8% concentrations). The 53-μm-CHF carried phenolics and carotenes, and composites showed antioxidant capacity. Homogeneous films with a continuous LMP matrix were obtained. The 5%-CHF composite showed the highest surface contact angle (44°) and tensile strength, without change in elongation, while WVP was decreased in the 3–8% CHF-LMP-films. The latter was ascribed to the CHF-filler crystallinity whereas the improvement in mechanical performance and contact angle was attributed to a CHF-interconnected network formed at 5%-CHF critical concentration. Corn husk residue can be utilized as a source of fibers for material development. Composites with enhanced performance can be an antioxidant strategy at food interfaces.