Antimicrobial biodegradable packaging films from phosphorylated starch: A sustainable solution for plastic waste

IF 2.4 3区化学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY

Carbohydrate Research Pub Date : 2025-01-24 DOI:10.1016/j.carres.2025.109404

Neeru Devi , Shayoraj , Geeta , Shivani , Simran Ahuja , Santosh Kumar Dubey , Sanjay Sharma , Satish Kumar

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引用次数: 0

Abstract

This study focused on developing biodegradable packaging films based on starch as an alternative to non-biodegradable such as petroleum-derived synthetic polymers. To improve its physicochemical properties, potato starch was chemically modified through phosphorylation. Starch phosphorylation was carried out using cyclic 1,3-propanediol phosphoryl chloride (CPPC), produced phosphorylated starch (PS), and analyzed using Fourier transform infrared (FT-IR), X-ray diffraction (XRD), Nuclear magnetic resonance (NMR), and Thermogravimetric analysis (TGA). The thermal stability of PS increased to 292 °C due to the formation of starch phosphate ester in comparison to pure starch (281 °C). Moreover, using glycerol as a plasticizer, the solvent casting method was employed to synthesize the PS/PVA biofilms. The synthesized biofilms (PPS) were further characterized using FT-IR, TGA, Mechanical testing, and Scanning electron microscopy (SEM). The result indicated that blend films have higher tensile strength (41.61 MPa) and elongation at break (240 %) than pure PVA film (29.84 MPa, 102 %). The soil burial study showed that the biodegradation of PPS blend films increased to 63.79 %. Nevertheless, the blend film showed decreased solubility, water absorption, water vapor transmission rate, and moisture content with PS, while its surface hydrophobicity increased from 61.2° to 95.6°. PPS blends have stronger antibacterial activity against S. aureus than E. coli. Accordingly, the prepared PPS III biofilm was further used for brown bread packaging. Compared to LDPE packaging, the bread wrapped in PPS III blend film exhibited enhanced visual appearance and extended shelf-life. The novelty of our work lies in the modification of starch using CPPC, which was further used to fabricate biodegradable films. Therefore, the developed biofilm may be a reference for additional research and can potentially replace synthetic, non-degradable polymer-based films in the packaging industry.

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来源期刊

Carbohydrate Research 化学-生化与分子生物学

CiteScore

5.00

自引率

3.20%

发文量

183

审稿时长

3.6 weeks

期刊介绍： Carbohydrate Research publishes reports of original research in the following areas of carbohydrate science: action of enzymes, analytical chemistry, biochemistry (biosynthesis, degradation, structural and functional biochemistry, conformation, molecular recognition, enzyme mechanisms, carbohydrate-processing enzymes, including glycosidases and glycosyltransferases), chemical synthesis, isolation of natural products, physicochemical studies, reactions and their mechanisms, the study of structures and stereochemistry, and technological aspects. Papers on polysaccharides should have a "molecular" component; that is a paper on new or modified polysaccharides should include structural information and characterization in addition to the usual studies of rheological properties and the like. A paper on a new, naturally occurring polysaccharide should include structural information, defining monosaccharide components and linkage sequence. Papers devoted wholly or partly to X-ray crystallographic studies, or to computational aspects (molecular mechanics or molecular orbital calculations, simulations via molecular dynamics), will be considered if they meet certain criteria. For computational papers the requirements are that the methods used be specified in sufficient detail to permit replication of the results, and that the conclusions be shown to have relevance to experimental observations - the authors'' own data or data from the literature. Specific directions for the presentation of X-ray data are given below under Results and "discussion".