Characterization of starch biofilm reinforced with cellulose microfibers isolated from Musa Saba' midrib residue and its application as an active packaging film

Two main disadvantages of starch‐based biofilms are their low mechanical strength and high hydrophobicity. This work investigated incorporation of cellulose microfibers (CMF) with a range of CMF loading (i.e., 0, 0.5, and 1.0 wt% of CMF) as fillers to improve the mechanical properties of starch‐base...

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Bibliographic Details
Published in:Journal of applied polymer science 2023-12, Vol.140 (48)
Main Authors: Wahab, Dayangku Nurshahirah Awang, Siddique, Md. Bazlul Mobin, Chew, Jiuan Jing, Su, Hieng Tiong, Khairuddin, Nozieana, Khaerudini, Deni Shidqi, Hossain, Md. Sohrab, Sunarso, Jaka
Format: Article
Language:English
Subjects:
Acetic acid
Biofilms
Cellulose
Chemical treatment
Distilled water
Electron microscopes
Elongation
Ethanol
Field emission microscopy
Fillers
Food packaging
Hydrophobicity
Mechanical properties
Microfibers
Modulus of elasticity
Photomicrographs
Residues
Steam explosions
Tensile strength
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Summary:Two main disadvantages of starch‐based biofilms are their low mechanical strength and high hydrophobicity. This work investigated incorporation of cellulose microfibers (CMF) with a range of CMF loading (i.e., 0, 0.5, and 1.0 wt% of CMF) as fillers to improve the mechanical properties of starch‐based biofilm. CMFs (average diameter = 75 μm) were isolated from midrib of Musa Saba' banana residue using chemical treatments of steam explosion alkaline treatment, acid‐chlorite treatment, and acid hydrolysis. The starch‐based biofilm showed improved tensile strength (32.5%), Young's Modulus (55.4%), opacity (23.7%), crystallinity (54.2%), and reduction in elongation (27%) with 1.0 wt% CMF loading compared with biofilm without CMF. The film's mechanical properties improvement is further supported by the even filler dispersion within the film matrix shown in field emission scanning electron microscope micrographs. Active packaging containing the antimicrobial compound of myricetin was incorporated into the 1.0 wt% CMF reinforced film to produce SC1M, which showed the fastest release of myricetin in 95% ethanol (fatty acid simulant), followed by 3% acetic acid (acidic simulant) and slowest in distilled water (aqueous simulant). CMF derived from banana midrib residue can be a viable bioreinforcement component for developing biofilms for fatty food packaging, which protects against humidity, oxygen, temperature, and light‐induced deterioration.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.54720