Synthesis, characterization and antimicrobial activity of Chitosan/Polyvinyl Alcohol blend doped with Hibiscus Sabdariffa L. extract

Abdelghany, A.M.; Menazea, A.A.; Ismail, Amani

doi:10.1016/j.molstruc.2019.07.089

Cited by 152 publications

(59 citation statements)

References 34 publications

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“…FTIR-ATR spectra of natural extract loaded films were shown some new peaks which are characteristic of natural extract, medium to strong absorption bands were observed in the region of 1250 to 857 cm −1 which probably due to C–C and C–O stretching of the pyranoid ring and C–O–C glycosidic bond. A new peak at 837 cm −1 appeared in all extract-loaded films, which become well relate to the ring vibration of carvacrol which is a chemical constituent of Ocimum tenuiflorium ( Altiok et al., 2010 ; Abdelghany et al., 2019 ; Schulz et al., 2005 ). However, not many changes were observed in CS/PVA films' characteristic spectra after extract addition, which confirms that natural extract is dispersed in the polymer matrix.…”

Section: Resultsmentioning

confidence: 85%

“…FTIR-ATR spectra of PVA, CS/PVA, and natural extract loaded CS/PVA films were shown in Figure 2 (b). FTIR-ATR spectra of CS/PVA blend films were shown some characteristic changes in the absorption pattern as well as the frequency shifting (lower range) due to hydrogen bonding interaction between reactive functional groups in CS (-NH 2 and -OH) and PVA (-OH) ( Figure 3 ) ( Abdelghany et al., 2019 ). The –CH stretching band was observed at 2925 cm −1 , C=O stretching (amide I) at 1648 cm −1, and deformed C–O stretching vibration of hydroxyl groups at 1066 cm −1 and C–N stretching vibration of CS at 1241 cm −1 ( Anicuta et al., 2010 ).…”

Section: Resultsmentioning

confidence: 99%

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Eco-friendly natural extract loaded antioxidative chitosan/polyvinyl alcohol based active films for food packaging

Annu

Ali

Ahmed³

2021

Heliyon

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Nowadays, biodegradable antimicrobial packaging materials draw substantial attention and are considered one of the preferred emerging technologies to be used in the food industry. In this study, we have reported developing a two-component, chitosan (CS) and polyvinyl alcohol (PVA) based films loaded with natural extract of Ocimum tenuiflorum via solvent casting technique. Experimental results showed that all the components were well dispersed, resulting in complete homogenous films. FTIR-ATR spectral analysis indicated strong interaction between the film matrix components, which also gets reflected by the films' physical properties. Transparent biodegradable films have resulted from the mixture and incorporation of the natural agent/extracts influenced light barrier, water resistance, moisture content (9.89–9.01%), and DPPH radical scavenging properties (antioxidant value ~41.1%) of the CS/PVA films. Therefore, this natural extract containing transparent CS/PVA-based films promises to be used in the food industry as packaging material to enhance food safety.

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Section: Resultsmentioning

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Eco-friendly natural extract loaded antioxidative chitosan/polyvinyl alcohol based active films for food packaging

Annu

Ali

Ahmed³

2021

Heliyon

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“…PVA is obtained from the presence of a hydroxyl group, which can facilitate the formation of hydrogen bonding [54]. PVA has insufficient elasticity, a thick membrane, and imperfect hydrophilic elements, limiting its utilization alone as a wound dressing polymeric material [16,[55][56][57]. Poly(ethylene glycol) (PEG) is a water-soluble synthetic polymer [22].…”

Section: Synthetic Polymermentioning

confidence: 99%

Biopolymer and Synthetic Polymer-Based Nanocomposites in Wound Dressing Applications: A Review

et al. 2021

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Biopolymers are materials obtained from a natural origin, such as plants, animals, microorganisms, or other living beings; they are flexible, elastic, or fibrous materials. Polysaccharides and proteins are some of the natural polymers that are widely used in wound dressing applications. In this review paper, we will provide an overview of biopolymers and synthetic polymer-based nanocomposites, which have promising applications in the biomedical research field, such as wound dressings, wound healing, tissue engineering, drug delivery, and medical implants. Since these polymers have intrinsic biocompatibility, low immunogenicity, non-toxicity, and biodegradable properties, they can be used for various clinical applications. The significant advancements in materials research, drug development, nanotechnology, and biotechnology have laid the foundation for changing the biopolymeric structural and functional properties. The properties of biopolymer and synthetic polymers were modified by blending them with nanoparticles, so that these materials can be used as a wound dressing application. Recent wound care issues, such as tissue repairs, scarless healing, and lost tissue integrity, can be treated with blended polymers. Currently, researchers are focusing on metal/metal oxide nanomaterials such as zinc oxide (ZnO), cerium oxide (CeO2), silver (Ag), titanium oxide (TiO2), iron oxide (Fe2O3), and other materials (graphene and carbon nanotubes (CNT)). These materials have good antimicrobial properties, as well as action as antibacterial agents. Due to the highly antimicrobial properties of the metal/metal oxide materials, they can be used for wound dressing applications.

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“…PVA is a semi-crystalline polymer produced by hydrolysis of poly (vinyl acetate); is a water soluble, biocompatible, cheap and non-toxic film offering good thermal stability, thermomechanical characteristics, flexibility and strength, physical and optical properties relevant for packaging applications [ 28 , 29 ]. Furthermore, the Food and Drug Administration (FDA) officially approved PVA for producing stretchable and flexible food packaging systems [ 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

Hydroxytyrosol and Oleuropein-Enriched Extracts Obtained from Olive Oil Wastes and By-Products as Active Antioxidant Ingredients for Poly (Vinyl Alcohol)-Based Films

et al. 2021

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Oxidative stability of food is one of the most important parameters affecting integrity and consequently nutritional properties of dietary constituents. Antioxidants are widely used to avoid deterioration during transformation, packaging, and storage of food. In this paper, novel poly (vinyl alcohol) (PVA)-based films were prepared by solvent casting method adding an hydroxytyrosol-enriched extract (HTyrE) or an oleuropein-enriched extract (OleE) in different percentages (5, 10 and 20% w/w) and a combination of both at 5% w/w. Both extracts were obtained from olive oil wastes and by-products using a sustainable process based on membrane technologies. Qualitative and quantitative analysis of each sample carried out by high performance liquid chromatography (HPLC) and nuclear resonance magnetic spectroscopy (NMR) proved that the main components were hydroxytyrosol (HTyr) and oleuropein (Ole), respectively, two well-known antioxidant bioactive compounds found in Olea europaea L. All novel formulations were characterized investigating their morphological, optical and antioxidant properties. The promising performances suggest a potential use in active food packaging to preserve oxidative-sensitive food products. Moreover, this research represents a valuable example of reuse and valorization of agro-industrial wastes and by-products according to the circular economy model.

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Synthesis, characterization and antimicrobial activity of Chitosan/Polyvinyl Alcohol blend doped with Hibiscus Sabdariffa L. extract

Cited by 152 publications

References 34 publications

Eco-friendly natural extract loaded antioxidative chitosan/polyvinyl alcohol based active films for food packaging

Eco-friendly natural extract loaded antioxidative chitosan/polyvinyl alcohol based active films for food packaging

Biopolymer and Synthetic Polymer-Based Nanocomposites in Wound Dressing Applications: A Review

Hydroxytyrosol and Oleuropein-Enriched Extracts Obtained from Olive Oil Wastes and By-Products as Active Antioxidant Ingredients for Poly (Vinyl Alcohol)-Based Films

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