Characteristics of HPMC/Beeswax Edible Composite Film and its Application for Preservation of Seedless Lime Fruit

Abstract

This article is aimed at evaluating newly synthesized HPMC/BW composite films, applied for preservation of seedless lime fruit. Factors influenced to formation of the films as well as characteristics of HPMC/BW edible composite films were researched and analyzed based on experimental results and previous studies. The HPMC/BW edible composite films were created based on the components included HPMC (5% w/v), Glycerol plasticizer (Gly-2% v/v), BW (5% w/v); Oleic Acid emulsifier (OA-1% v/v). Characteristics of the composite film were evaluated via the analytical techniques known as Sensory, Tensile Strength (TS), Elongation at Break (EB), ThermoGravimetric Analyzer (TGA), Scanning Electron Microscope (SEM), Fourier Transform InfraRed (FTIR). HPMC/BW composite films applied in preserving seedless limes. Evaluations of preservation processes were based on effects of characteristics such as Sensory evaluation, Respiratory intensity, Weight loss, Vitamin C content, Total acid of before and after fruits preservation.

Effects of Plasticizers on Mechanical Properties, Oxygen Permeability, and Microstructural Characteristics of HPMC/Beeswax Composite Film

“…Glycerol films decreased the TS values from 9.63 MPa to 3.81 MPa, meanwhile, the EB values increased from 10.61% to 24.63%. The results are similar to other publications on different biofilms [10][11][12][13][14][15][16][17][18][19][20][21]. Besides, when the content of PG was increased, the EB values also rose from 9.82% to 19.21% and the values of TS reduced from 10.12 MPa to 4.25 MPa.…”

“…This explanation is also consistent with many studies when evaluating the effect of the same plasticizer on different biofilms. The higher the amount of plasticizer is, the more flexible the film is and it has been observed in various HPMC-based films [11][12][13][14][15].…”

“…These results demonstrate that Glycerol was the most efficient in weakening the forces of interactions among the polymer chains and enhance film mechanical properties Plasticization mostly depends on physicochemical properties, chemical structure, shape, polarity, chain length, physical state, and number of active functional groups of plasticizers. Glycerol, PG, and PEG 400 are all straight -chain polyols, therefore, the different plasticizer behaviors are determined by the molecular weight (Mw) and hygroscopic character [13][14][15][16][17][18][19][20][21].…”

Effects of Emulsifiers on Engineering and Microstructural Properties of HPMC/Shellac Composite Films

“…The natural polymers such as lipid, starch, cellulose, and derivatives are the most common coating materials, which can be used alone or combined to form edible preservative films. The cellulose derivatives (HPMC), lipids (Shellac), and additives are mixed to form an HPMC/Sh emulsion system that improves the beneficial properties of the materials [1,2]. In which, the emulsifiers have a role as additives to stabilize and enhance the dispersion of the emulsion system [3].…”

“…This affects the organization and rearrangement of the components in the membrane. Thereby, it leads to a decrease or loss of membrane transparency as well as intra-and extra molecular interactions among functional groups in fatty acids and HPMC/Sh [1,4,10].…”