Cellulose Nanofibrils from Sugarcane Bagasse as a Reinforcing Element in Polyvinyl Alcohol Composite Films for Food Packaging

Otenda, Brian Victor; Kareru, Patrick; Madivoli, Edwin Shigwenya; Maina, Ernest Gachui; Wanakai, Sammy Indire; Wanyonyi, Wycliffe Chisutia

doi:10.1080/15440478.2020.1848712

Cited by 15 publications

(7 citation statements)

References 39 publications

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“…Figure 8 shows the XRD patterns and corresponding crystallinity index (CrI) of CNF, PVA and AgNPs@PVA-CNF. Cellulose is composed of both crystalline and amorphous domains which tend to influence the XRD diffractogram observed 41 , 43 , 78 . The diffractogram of cellulose isolated from bagasse composed of a peaks at at 2 θ angles of 16°, 22°, 34°, respectively, and were attributed to the diffraction planes of (101), (002) and (040) crystalline plane cellulose 41 , 43 , 78 .…”

Section: Resultsmentioning

confidence: 99%

“…Cellulose is composed of both crystalline and amorphous domains which tend to influence the XRD diffractogram observed 41 , 43 , 78 . The diffractogram of cellulose isolated from bagasse composed of a peaks at at 2 θ angles of 16°, 22°, 34°, respectively, and were attributed to the diffraction planes of (101), (002) and (040) crystalline plane cellulose 41 , 43 , 78 . The diffractograms of PVA on the other, had one sharp peak with a shoulder at 2 θ = 19° and another small peak at 2 θ = 40° which upon incorporation of CNF within its marix led to overlapping of CNF and PVA peak that resulted in a broad peak centred at 2 θ = 20°.…”

Section: Resultsmentioning

confidence: 99%

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Cellulose nanofibrils and silver nanoparticles enhances the mechanical and antimicrobial properties of polyvinyl alcohol nanocomposite film

Madivoli

Kareru

Gichuki

et al. 2022

Sci Rep

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Recent findings of microplastics in marine food such as fish, crabs and shrimps necessitate the need to develop biodegradable packaging materials. This study reports on the development of a biodegradable packing material from cellulose nanofibril-polyvinyl alcohol nanocomposite embedded with silver nanoparticles. Microcrystalline cellulose was isolated from sugarcane bagasse via the kraft process followed by conversion of cellulose I to cellulose II using NaOH/urea/water solution. The nanofibrils were then isolated using (2,2,6,6-Tetramethylpiperidin-1-yl) oxyl (TEMPO) and used as a reinforcing element in polyvinyl alcohol composite prepared through solvent casting. The tensile strength, water solubility, optical properties, water vapor permeability and wettability of the prepared films were then evaluated. The antimicrobial potency of the films was evaluated using the disc diffusion antimicrobial assay against selected microorganisms.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Cellulose nanofibrils and silver nanoparticles enhances the mechanical and antimicrobial properties of polyvinyl alcohol nanocomposite film

Madivoli

Kareru

Gichuki

et al. 2022

Sci Rep

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“…The SLPP based PVOH film is made up of –OH (hydroxyl groups) that has a high affinity for water molecules, making the resulting films more soluble. 39 This reduces its mechanical strength, putting it at a significant disadvantage in terms of its use as a packaging material. But with the addition of fibre in the SLPP matrix, the solubility was reduced to a great extent.…”

Section: Resultsmentioning

confidence: 99%

Influence of sugarcane bagasse fibre on the properties of sweet lime peel- and polyvinyl alcohol-based biodegradable films

Singha

Rani

Badwaik

2023

Sustainable Food Technol.

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“…The thin films were mounted on carbon-coated SEM grid, gold-sputtered before analysis to prevent charging, and analyzed with the SEM operated at an accelerating voltage of 30 kV. The size distribution of the nanoparticles was obtained using image J software version 1.53u where sample points of the nanoparticles in the images were selected and their means, frequency, and histograms calculated [ 35 ].…”

Section: Characterization Of Agnps–lg–tdimentioning

confidence: 99%

Encapsulation of AgNPs in a Lignin Isocyanate Film: Characterization and Antimicrobial Properties

et al. 2023

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Lignin isolated from agricultural residues is a promising alternative for petroleum-based polymers as feedstocks in development of antimicrobial materials. A polymer blend based on silver nanoparticles and lignin–toluene diisocyanate film (AgNPs–Lg–TDIs) was generated from organosolv lignin and silver nanoparticles (AgNPs). Lignin was isolated from Parthenium hysterophorus using acidified methanol and used to synthesize lignin capped silver nanoparticles. Lignin–toluene diisocyanate film (Lg–TDI) was prepared by treating lignin (Lg) with toluene diisocyanate (TDI) followed by solvent casting to form films. Functional groups present and thermal properties of the films were evaluated using Fourier-transform infrared spectrophotometry (FT–IR), thermal gravimetry (TGA), and differential scanning calorimetry (DSC). Scanning electron microscopy (SEM), UV–visible spectrophotometry (UV–Vis), and Powder X-ray diffractometry (XRD) were used to assess the morphology, optical properties, and crystallinity of the films. Embedding AgNPs in the Lg–TDI films increased the thermal stability and the residual ash during thermal analysis, and the presence of powder diffraction peaks at 2θ = 20, 38, 44, 55, and 58⁰ in the films correspond to lignin and silver crystal planes (111). SEM micrographs of the films revealed the presence of AgNPs in the TDI matrix with variable sizes of between 50 to 250 nm. The doped films had a UV radiation cut-off at 400 nm as compared to that of undoped films, but they did not exhibit significant antimicrobial activity against selected microorganisms.

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Cellulose Nanofibrils from Sugarcane Bagasse as a Reinforcing Element in Polyvinyl Alcohol Composite Films for Food Packaging

Cited by 15 publications

References 39 publications

Cellulose nanofibrils and silver nanoparticles enhances the mechanical and antimicrobial properties of polyvinyl alcohol nanocomposite film

Cellulose nanofibrils and silver nanoparticles enhances the mechanical and antimicrobial properties of polyvinyl alcohol nanocomposite film

Influence of sugarcane bagasse fibre on the properties of sweet lime peel- and polyvinyl alcohol-based biodegradable films

Encapsulation of AgNPs in a Lignin Isocyanate Film: Characterization and Antimicrobial Properties

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