A hybrid structure based on silk fibroin/PVA nanofibers and alginate/gum tragacanth hydrogel embedded with cardamom extract Shadan Irantash, Adeleh Gholipour-Kanani, Najmeh Najmoddin, Mehdi Varsei Scientific Reports, 2024 Hybrid structures made of natural-synthetic polymers have been interested due to high biological features combining promising physical–mechanical properties. In this research, a hybrid dressing consisting of a silk fibroin (SF)/polyvinyl alcohol (PVA) nanofibers and sodium alginate (SA)/gum tragacanth (GT) hydrogel incorporating cardamom extract as an antibacterial agent was prepared. Accordingly, SF was extracted from cocoons followed by electrospinning in blend form with PVA (SF/PVA ratio: 1:1) under the voltage of 18 kV and the distances of 15 cm. The SEM images confirmed the formation of uniform, bead free fibers with the average diameter of 199 ± 28 nm. FTIR and XRD results revealed the successful extraction of SF and preparation of mixed fibrous mats. Next, cardamom oil extract-loaded SA/GT hydrogel was prepared and the nanofibrous structure was placed on the surface of hydrogel. SEM analysis depicted the uniform morphology of hybrid structure with desirable matching between two layers. TGA analysis showed desired thermal stability. The swelling ratio was found to be 1251% after 24 h for the hybrid structure and the drug was released without any initial burst. MTT assay and cell attachment results showed favorable biocompatibility and cell proliferation on samples containing extract, and antibacterial activity values of 85.35% against S. aureus and 75% against E. coli were obtained as well. The results showed that the engineered hybrid nanofibrous-hydrogel film structure incorporating cardamom oil extract could be a promising candidate for wound healing applications and skin tissue engineering.
Preclinical evaluation of the polycaprolactone-polyethylene glycol electrospun nanofibers containing egg-yolk oil for acceleration of full thickness burns healing Vida Shadman-Manesh, Adeleh Gholipour-Kanani, Najmeh Najmoddin, Shahram Rabbani Scientific Reports, 2023 Considering the great potential of egg yolk oil (EYO) in management of burn wounds and superb biological properties of polycaprolactone (PCL) and polyethylene glycol (PEG), hereby, a PCL-PEG-EYO scaffold was developed by electrospinning method for burn healing. The physico-chemical characterizations were performed using SEM, FTIR and contact angle tests. The biological properties of the fabricated scaffolds were evaluated by antibacterial test, in vitro cell culturing, MTT assay and in vivo experiments. The SEM images of PCL-PEG-EYO nanofibers demonstrated a uniform bead-free morphology with 191 ± 61 nm diameter. The fabricated scaffold revealed hydrophilicity with the water contact angel of 77°. No cytotoxicity was observed up to 7 days after cell culturing onto the PCL-PEG-EYO nanofibrous surface. The presence of EYO in the PCL-PEG-EYO scaffold meaningfully improved the cell viability, proliferation and attachment compared to PCL-PEG scaffold. Moreover, the PCL-PEG-EYO scaffolds demonstrated antibacterial activity against Staphylococcus aureus and Pseudomonas aeruginosa bacteria strain. Finally, a statistically significant enhancement in wound closure, re-epithelialization, angiogenesis and collagen synthesis was observed at the end of 21-day treatment period using PCL-PEG-EYO nanofibrous scaffold. Overall, the PCL-PEG-EYO nanofibrous scaffolds demonstrated a great potential in management of full thickness burn wounds in vivo.
Polymer-Based Nanofibers Adeleh Gholipour-Kanani, Niloofar Eslahi Handbook of Nanofibers and Nanocomposites Characteristics Synthesis and Applications in Textiles, 2023 This chapter reviews the progress of fabrication techniques to produce nanofibers from different types of natural and synthetic polymers in different structures to accomplish the requirements of a particular application. Polymer-based nanofibers are considered for many applications in different industrial features such as filtration, chemical sensors, nanomedicine, tissue engineering, wound dressing, drug delivery, electronic devices, etc. According to the definition of nanotechnology by the National Nanotechnology Initiative, nanoscale materials are special structures that have at least one dimension below 100 nm. The methods for fabricating nanofibers can be divided into two main groups: non-electrospinning methods by using mechanical force including drawing, phase separation, self-assembly and template synthesis and electrospinning methods by using electrostatic force. In rotary spinning, centrifugal spinning, or force spinning, fibers are fabricated by centrifugal forces from a wide range of materials at high speed and low cost. Blown bubble-spinning as a low-cost simple process utilizes polymer melts or solutions to fabricate discontinuous nanofibers by using blowing air.
Nanofibrous composite from polycaprolactone-polyethylene glycol-aloe vera as a promising scaffold for bone repairing Fatemeh Dehghan, Adeleh Gholipour‐Kanani, Mehdi Kamali Dolatabadi, Seyed Hajir Bahrami Journal of Applied Polymer Science, 2022 Recently, herbal extract‐loaded nanofibers have been developed using different types of components for tissue engineering applications. In this study, nanofibrous webs are fabricated from polycaprolactone (PCL)‐polyethylene glycol (PEG) 1:1 mass ratio blend incorporated with different amounts of aloe vera extract through electrospinning. Combining the potential therapeutic properties of aloe vera in bone repair with physicochemical and biological properties of the nanofibers leads to design a promising scaffold for bone repairing. The produced scaffolds are characterized using scanning electron microscopy, Fourier transform infrared (FTIR), and mechanical‐strength test. From the results, the electrospun PCL‐PEG‐aloe vera web with 1:1:1 mass ratio shows a bead‐less bimodal morphology consisting of nano‐scale and micro‐scale fibers with an average diameter of 280 and 670 nm, respectively. FTIR spectra revealed the possible hydrogen bonding between the three components. Mechanical investigation exhibited higher strength of aloe vera loaded nanofibers to unloaded nanofibers. From the MTT assay results, aloe vera‐loaded nanofibrous scaffolds showed a high level of cell compatibility as well as excellent penetration, cell growth, and proliferation. According to the result of calcination, the ability of bone repairing was verified. The result confirmed a higher amount of calcium deposition on nanofibrous scaffolds incorporated with aloe vera extract.
Fabrication and Characterization of Nanofibrous Scaffold Based on Chitosan Containing Cerium Oxide Nanoparticles for Wound Healing Application Adeleh Gholipour-Kanani, Azadeh Asefnejad, Kimiya Azadbakht Iranian Journal of Polymer Science and Technology, 2022 Hypothesis: Incorporating different types of nanoparticles, especially metal oxide nanoparticles, into the polymeric nanofiber substrate improves different properties of the web. In this research, citric acid is used as an environmentally friendly cross-linking agent to reduce the hydrophilic property of chitosan-polyvinyl alcohol web. Cerium oxide nanoparticles (nanoceria) as an antioxidant and antibacterial agent are used to increase the biological capabilities of the web for healing applications.Methods: Chitosan (CS)/poly(vinyl alcohol) (PVA)/citric acid (CA) nanofibers with the mass ratios of 1:1:0.5 and 2:3:1 (CS:PVA:CA) were prepared and electrospun. Nanoceria was loaded into the optimal blend prepared for electrospinning. In continuation, the physical-morphological properties, cell compatibility, non-cytotoxicity, and antibacterial activity of the resulting webs were investigated.Findings: Physical-morphological investigations show that the CS:PVA:CA (2:3:1) nanofiber which was electrospun under 15 kV and 18 cm is the optimal nanofiber with an average diameter of 175±29 nm. The contact angle is about 42 degrees, indicating a suitable decrease in hydrophilicity and maintaining the physical integrity of the web. The SEM images show a bead-less morphology with an average diameter of 274±38 nm for nanofibrous web containing 1.5% (by wt) CeO2. The presence of nanoceria and interactions of the functional groups in the components were evident in their EDS and FTIR spectra, respectively. The results of the cell-culturing demonstrate the proper growth and proliferation of fibroblast cells on both with and without-nanoceria webs. The result of the MTT test confirms the non-toxicity of both scaffolds. The antibacterial investigations show improvements in antibacterial activities of the nanofibers containing cerium-oxide against both gram-positive and gram-negative bacteria. In general, the results determined that the presence of nanoceria in chitosan-polyvinyl-alcohol-citric acid electrospun nanofibers has clearly improved the biological properties, especially the antibacterial behavior of the obtained web, so it can be used as a suitable dressing for wound healing application.
Morphological, mechanical and biological properties of novel PCL- Cs/PVA multi layer nanofibrous scaffolds Digest Journal of Nanomaterials and Biostructures, 2012
Nanofibers from Chitosan_ Poly Vinyl Alcohol blend and their biological and antimicrobial properties and Process optimization using response surface methodology VDI Berichte, 2008
Nanofibers from Chitosan_ Poly Vinyl Alcohol blend and their biological and antimicrobial properties and Process optimization using response surface methodology VDI Berichte, 2008
Industry, Institute, or Organisation Collaboration