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Showing 2 results for Electrospining
M. Farbodi, A.r. Khoshkbar Sadeghi ,
Volume 9, Issue 4 (12-2018)
Abstract
Aims: In medicine, nanofiber can be used in wound dressing. The aim of this study was to prepare carboxymethyl cellulose/calcium alginate/polyvinyl alcohol/silver (CMC/Alg/PVA/Ag) nanocomposite by electrospinning method and to investigate its performance as wound dressing.
Materials and Methods: In the present experimental study, CMC biofilm was prepared by solution method. Then, calcium alginate/polyvinyl alcohol/silver (Alg/PVA/Ag) nanofiber was prepared by electrospining method in the optimal conditions and deposited on CMC film. Finally, the possibleof application of the product as wound dressing and its antibacterial and morphological properties, as well as permeability to water vapor were investigated.
Findings: CMC/Alg/PVA/Ag film had more permeability in comparison to Alg/PVA/Ag nanofibers and less water vapor permeability value in comparison to CMC film. The most sensivity belonged to Escherichia coli and Klebsiella pneumoniae gram-negative bacteria with inhibition zone diameter of 23mm and 24mm, respectively, and Staphylococcus aureus and Staphylococcus saprophyticus gram-positive bacteria with inhibition zone diameter of 21mm and 17mm, respectively, for CMC/Alg/PVA/Ag film. Also, the wound with CMC/Alg/PVA/Ag dressing significantly showed more healing speed in comparison to CMC dressings and CMC/Ag.
Conclusion: The use of CMC/Alg/PVA/Ag nanocomposite as wound dressing is possible. This dressing, with pores, allows the vapors to flow through the wound secretions, is impermeable to liquids and bacteria, but is permeable to oxygen and vapor; it is not allergenic and does not cause toxicity and chemical stimulation, transparent dressing and the possibility of seeing the wound is easily possible, it provides the moisture level needed for wound healing, it does not stick to the wound and as a result, its replacement is without pain and cheap.
Volume 17, Issue 103 (8-2020)
Abstract
In this study, the possibility of microencapsulation of Oliveria decumbens essential oil (ODEO) was investigated on the microstructure of microfibers. The fibers were produced using polymeric cellulose acetate (CA) and the essential oil was added to the electrospun solution at different concentrations (0, 15, 25, 35 and 45%). The samples were analyzed using SEM and FTIR. SEM micrographs showed that all of fibers had homogenous structure without nodes. However addition of ODEO at 45% significantly increased the diameter of fibers compared to control sample. FTIR results of control and 45% ODEO fibers showed that in both samples there are distinct peaks of CA, and in fiber containing essential oils in addition to the CA peaks, the peaks in the 812 belong to the compound containing para and in 771 and 899 are related to compounds containing meta bonds. Both of them represent the aromatic compounds of the essential oil. The results of the antimicrobial activity of the fibers showed that the inhibition of the ODEO fibers against Staphylococcus aureus was generally higher than E. coli. Antimicrobial activity was increased with increasing ODEO concentrations.