Valorization of cellulose nanofibers from lignocellulosic residues and its antimicrobial application in food packaging

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dc.contributor.advisorMalik, Kamla
dc.contributor.authorDandu Harikarthik
dc.date.accessioned2024-03-14T09:40:24Z
dc.date.available2024-03-14T09:40:24Z
dc.date.issued2023-09-27
dc.description.abstractThe present investigation was carried out on the extraction and characterization of cellulose nanofibers (CNF) from rice straw and sugarcane bagasse and their application for improving the shelf life of tomatoes and apples. Acid- and alkali-treated rice straw and sugar cane bagasse contained 88.5 and 89% cellulose, 4.7 and 4.80% hemicellulose, and 2.3 and 5.10% lignin, respectively. FTIR spectral analysis showed peaks at 1512 cm-1 that indicate significant solubilization of lignin in the respective treatments of rice straw and sugarcane bagasse. The disappearance of the peak at 1743 cm-1 is assigned either to the acetyl and uronic ester groups of the hemicelluloses or to the ester linkage of the carboxylic groups of the ferulic and p-coumeric acids of lignin or hemicellulose. Cellulose nanofibers were homogenised in a magnetic stirrer in proportion to 7 CNF:1 chitosan by varying different concentrations of chitosan (0.2, 0.4, 0.6, 0.8 and 1% chitosan) and further prepared as bio-nanocomposites. Bio-nanocomposites (BNC) 1% showed maximum antimicrobial activity against bacteria such as Bacillus cereus (36 mm), Escherichia coli (10 mm), Xanthomonas campestris (38 mm), Erwinia carotovora (33 mm), Clavibacter michiganesis (29 mm), and Pseudomonas syringae (27 mm). Different concentrations of bio-nanocomposites were used as coatings for improving the shelf life of apples and tomatoes (cherry and Hisar Arun varieties). It was observed that the physiological loss (%) was less in 1% coated bio-nanocomposite (1.23, 3.75, and 2.11%) at 30 days as compared to control (4.02, 15.90, and 5.01%) of apples, cherry tomatoes and Hisar Arun, respectively. Fruit firmness was also found to be maximum in 1% coated bio-nanocomposite (16.99, 4.88, and 7.41 kg/cm2) at 30 days as compared to control (14.01, 1.02, and 3.45 Kg/cm2) of apples and tomatoes (Cherry and Hisar Arun). Total soluble solids (0 Brix) and pH were lower in the 1%-coated bio-nanocomposite at 30 days as compared to the control apples and tomatoes.
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810207507
dc.language.isoEnglish
dc.pages74+xiv
dc.publisherCCSHAU, Hisar
dc.subMicrobiology
dc.themeValorization of cellulose nanofibers from lignocellulosic residues and its antimicrobial application in food packaging
dc.these.typePh.D
dc.titleValorization of cellulose nanofibers from lignocellulosic residues and its antimicrobial application in food packaging
dc.typeThesis
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