Antioxidant, antibacterial and antifungal electrospun nanofibers for food packaging applications.

Electrospinning is an effective and versatile method to prepare continuous polymer nanofibers and nonwovens that exhibit excellent properties such as high molecular orientation, high porosity and large specific surface area. Benefitting from these outstanding and intriguing features, electrospun nanofibers have been employed as a promising candidate for the fabrication of food packaging materials. Actually, the electrospun nanofibers used in food packaging must possess biocompatibility and low toxicity. In addition, in order to maintain the quality of food and extend its shelf life, food packaging materials also need to have certain functionality. Herein, in this timely review, functional materials produced from electrospinning toward food packaging are highlighted. At first, various strategies for the preparation of polymer electrospun fiber are introduced, then the characteristics of different packaging films and their successful applications in food packaging are summarized, including degradable materials, superhydrophobic materials, edible materials, antibacterial materials and high barrier materials. Finally, the future perspective and key challenges of polymer electrospun nanofibers for food packaging are also discussed. Hopefully, this review would provide a fundamental insight into the development of electrospun functional materials with high performance for food packaging.

Electrospun Functional Materials toward Food Packaging Applications: A Review.

Preparation, characterization and antimicrobial activity of polyvinyl alcohol/gum arabic/chitosan composite films incorporated with black pepper essential oil and ginger essential oil.

Background With an ever increasing demand for green materials to produce new, environmentally safe and high-quality products, edible polymers from natural polymeric materials have been attracting considerable attention in recent years. Edible polymers are mainly composed of polysaccharides, proteins and lipids, are nature based materials, which can be easily consumed by animals and human without any harmful effect on health. With the attractive features of the edible polymers such as biodegradability and bio/environmental compatibility over non-biodegradable synthetic polymers, these polymers have found wide-spread applications in food, agricultural industries, and biomedical fields. Scope and approach The current review mainly focus on the diversification of different sources of raw and edible polymeric materials, various forms or shapes (such as particles and films applied in green and smart textiles) along with the methods of fabrication, and applications as biofilms/coating technologies (for foods preservation), active/smart food packaging, functional food coating, smart drug delivery, wound dressing, tissue engineering, medical devices, personal care products, water/wastewater treatment and energies. Improving the mechanical properties, permeability and functionality are the main motivation for developing composites from polysaccharides, proteins and lipids, and these are discussed under the diverse application profile of novel edible composites. Safety and commercial aspects of edible products are also discussed within this review. Key findings and conclusions Exploring new sources of edible polymers, incorporation of active components, with combination of different edible materials and simultaneous utilization of nanotechnology/nanodevices are fundamental towards the design of environmental friendly materials in food, biomedical, and energy. Due to the greater need to conserve the nature and human existence/needs, such materials are highly used to extend the shelf life of food, achieving maximum therapeutics outcome through the development of innovative edible electronics, sensors, delivery systems, and green cosmetics.

Edible polymers: An insight into its application in food, biomedicine and cosmetics

https://digital.csic.es/bitstream/10261/200075/1/Goksen_Food%20Control_2020.pdf

Phytochemical-loaded electrospun nanofibers as novel active edible films: Characterization and antibacterial efficiency in cheese slices

Natural and edible materials have attracted increasing attention in food packaging, which could overcome the serious environmental issues caused by conventional non-biodegradable synthetic packaging. In this work, gelatin nanofibers incorporated with two kinds of essential oil (EO), peppermint essential oil (PO) and chamomile essential oil (CO), were fabricated by electrospinning for potential edible packaging application. Electron microscopy showed that smooth and uniform morphology of the gelatin/EOs was obtained, and the diameter of nanofibers was mostly enlarged with the increase of the EO content. The proton nuclear magnetic resonance spectrum confirmed the existence of PO and CO in nanofibers after electrospinning. The addition of EOs led to an enhancement of the water contact angle of nanofibers. The antioxidant activity was significantly improved for the nanofibers loaded with CO, while the antibacteria activity against Escherichia coli and Staphylococcus aureus was better for the fibers with PO addition. The combination of half PO and half CO in nanofibers compensated for their respective limitations and exhibited optimum bioactivities. Finally, the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay with NIH-3T3 fibroblasts demonstrated the absence of cytotoxicity of the gelatin/EO nanofibers. Thus, our studies suggest that the developed gelatin/PO/CO nanofiber could be a promising candidate for edible packaging.

Electrospun Gelatin Nanofibers Encapsulated with Peppermint and Chamomile Essential Oils as Potential Edible Packaging

The invention provides a nano-fiber dressing, which is prepared from polyvinyl alcohol, sodium alginate and honey through electrostatic spinning. In comparison with the prior art, the nano-fiber dressing, which takes the polyvinyl alcohol, the sodium alginate and the honey as electrostatic spinning materials, has biocompatibility, and the obtained nano-fiber dressing, as a green-going and harmlessdressing, is free from toxins and harm to cells; meanwhile, the nano-fiber dressing is also relatively high in porosity and large in unit specific surface area, and the nano-fiber dressing, which issimilar to the structure of an extracellular matrix, is conducive to cell adhesion and reproduction; the nano-fiber dressing can replace damaged skin to take a temporary barrier effect; the nano-fiberdressing is good in gas/water vapor permeability, so that an appropriate environment can be provided for tissue self-healing repair and wound healing, wound infection is avoided and controlled and wound healing is promoted; and in addition, the honey in the dressing also includes various bio-active ingredients, so that bacteriostatic and antioxidant activities and healing capacity of the dressingare improved and effects of inhibiting bacterium growth and promoting skin healing are achieved.

Nano-fiber dressing and preparation method thereof

The invention provides a biological barrier built based on a single-layer nanofiber substrate co-culture technique, a method for building the biological barrier and a micro-fluidic chip. The biological barrier built based on the single-layer nanofiber substrate co-culture technique is good in biocompatibility and uniform in membrane pore size, a biological barrier model with high stability and repeatability and physiological functions approximating to in vivo functions can be formed, and the biological barrier can be matched with a micro-fluidic device.

Method for building biological barrier based on single-layer nanofiber substrate co-culture technique

The invention discloses a method for preparing a cell culture plate with polymer fibers. The method comprises the following steps: heating a polymer to a molten state; extruding the polymer in a molten state from a nozzle; forming polymer fibers on a conductive collecting plate at a distance of 1.5mm to 5.0mm from the nozzle; controlling the conductive collecting plate to move according to a preset trajectory, and forming a plurality of mutually parallel polymer fibers on the conductive collecting plate, thereby forming a cell culture substrate with the polymer fibers on the conductive collecting plate. The cell culture plate prepared by the method provided by the invention has a very good alignment pattern and has a good alignment effect on cells, thereby realizing the effective guidanceof cell alignment in in vitro cell culture. The invention also provides a cell culture plate with polymer fibers, which has the beneficial effects.

Cell culture plate with polymer fibers and preparation method of cell culture plate with polymer fibers

The invention discloses a method for preparing a cell culture plate with microcolumn arrays. The method comprises the steps that a polymer is heated to a molten state; the polymer in the molten stateis extruded from a nozzle to form polymer droplets; the nozzle and a conductive collecting plate with the distance of 3 mm-10 mm to the nozzle are controlled to form voltage difference so that polymerfibers are formed on the conductive collecting plate through the nozzle; the nozzle is controlled to sequentially stack the polymer fibers at predetermined positions on the conductive collecting plate to form a plurality of polymer stacked columns in array distribution, so that the cell culture plate with a plurality of polymer microcolumn arrays is formed on the conductive collection plate. Thepreparation method can be completed in full automation by a machine, the preparation process and preparation equipment are relatively simple, the production cost is low, the batch production can be achieved, and the application of the cell culture plate with the microcolumn arrays is expanded in biotechnology.

Tang Yadong

Papers

Electrospun Gelatin Nanofibers Encapsulated with Peppermint and Chamomile Essential Oils as Potential Edible Packaging

Nano-fiber dressing and preparation method thereof

Method for building biological barrier based on single-layer nanofiber substrate co-culture technique

Cell culture plate with polymer fibers and preparation method of cell culture plate with polymer fibers

Cell culture plate with microcolumn arrays and preparation method thereof