Permeability and Mechanical Properties of Cellulose‐Based Edible Films

Abstract

Factors affecting barrier properties [oxygen permeability (OP) and water vapor permeability (WVP)] and mechanical properties [tensile strength (TS) and elongation (E)] were investigated for methyl ccllulose (MC) and hydroxypropyl cellulose (HPC) films. OP, WVP and TS of MC and HPC films increased as the molecular weight (MW) of the cellulose increased. E of MC films increased as MW increased, but E of HPC films was highest for the intermediate MW of 370,000. OP, WVP and TS of MC films were not a function of thickness, but E slowly increased as film thickness increased. OP and WVP of HPC films were not relatable to film thickness, but TS and E of HPC films slowly increased as film thickness increased. TS decreased and E increased for both film types as concentration of plasticizers was increased. Plasticizers enhanced or retarded OP and WVP of cellulosebased films, depending on their concentrations.

Development and characterization of edible films based on gluten from semi-hard and soft Brazilian wheat flours (development of films based on gluten from wheat flours)

“…All films with low amounts of glycerol had higher tensile strength and lower percent elongation at break, in agreement with TANADA-PALMU et al [43]. This similar behavior has been reported for other films [16,29,34]. Films with vital gluten and both concentrations of glycerol (15 and 25%) showed significantly higher percent elongation at break than the films made with gluten from Brazilian wheat flours.…”

Physical and Mechanical Properties of Hydroxypropyl Methylcellulose–Coated Paper as Affected by Coating Weight and Coating Composition

“…This implied that PEG could make HPMC coating flexible. Park et al (1993) and Cao et al (2009) also found that the addition of PEG led to a decrease in TS and elastic modulus, which led to an increase in %E of hydroxypropyl cellulose and gelatin films, respectively.…”

Relationship between Solubility, Moisture Sorption Isotherms and Morphology of Chitosan/methylcellulose Films with Different Carbendazim Content

“…Film flexibility has been shown to increase with increasing MC content (García et al, 2004). Several studies have been carried out evaluating mechanical properties including water vapor permeability and the moisture sorption isotherm of chitosan, methylcellulose and chitosan blended films (Chen et al, 1996;Donhowe and Fennema, 1993;Nazan Turhan and Sahbaz, 2004;Park et al, 1993;Sangsuwan et al, 2008). However, little research has been done on the moisture sorption properties of chitosan or chitosan/methylcellulose materials incorporated with antimicrobial agents.…”

“…Methylcellulose (MC) is a nonionic cellulose with excellent film-making properties including a high solubility and efficient oxygen and lipid barrier properties (Donhowe and Fennema, 1993). These materials are also selectively permeable to CO 2 and O 2 , and hence, retard the respiration and ripening of many fruits and vegetables by limiting the availability of O 2 (Park et al, 1993). Blending methylcellulose with chitosan allows for the production of new materials with the benefits of both able to limit these weaknesses of each material when used individually.…”