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Electrospun Twin Fibers Encumbered with Intrinsic Antioxidant Activity as Prospective Bandage
Touseef Amna,Fatehia N Gharsan,Ke Shang,M. Shamshi Hassan,길명섭,황인호 한국고분자학회 2019 Macromolecular Research Vol.27 No.7
Our investigation for the first time explores the possibility of fabrication of a Capsaicin/polyurethane-based bioactive wound dressing. A micro/nanofibrous bandage was synthesized by electrospinning polyurethane supplemented with natural anti-inflammatory agent, Capsaicin. Herein, the best concentration (3%) of Capsaicin in polyurethane to get a consistent solution was standardized in order to acquire the composite micro/nanofibrous dressing. The as-spun bandage has been investigated by scanning electron microscopy and Fourier transform infrared spectroscopy, and biocompatibility of muscle cells on the bioactive bandage was also examined. Free radical scavenging activity of the fabricated micro/nanofiber bandage was estimated using 2,2-diphenyl-1-picrylhydrazyl assay. Inclusion of Capsaicin in polyurethane transformed the morphology as well as dimension of the fibers. Anti-oxidant wound bandage with diameters around 150-500 nm was fabricated by physical unification of polyurethane with natural Capsaicin. Here, polyurethane was used as a foundation polymer, which was blended with Capsaicin to attain desirable characteristics such as better anti-oxidant activity, hydrophilicity and excellent cell attachment. The polyurethane wound bandage possesses enlarged surface, proscribed evaporation, and fluid drainage ability. These results suggest the beneficial influence of antioxidant Capsaicin on wound repairing process. Therefore, a biologically active, natural compounds such as Capsaicin is material of choice for fabrication of future wound dressings.
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Ayman Yousef,김학용,Nasser A. M. Barakat,TOUSEEFAMNA,Mohammad Ali Abdelkareem,라잔 우니탄 아페,Salem S. Al-Deyab 한국고분자학회 2012 Macromolecular Research Vol.20 No.12
Adsorption ability and antibacterial activity could be created in a single electrospun nanofiber mat. Activated carbon/silver-doped polyurethane electrospun nanofiber mats have been introduced as a novel multifunction nanostructural material. Production of the introduced mat could be achieved by electrospinning of a colloidal solution from polyurethane containing activated carbon nanoparticles and silver nitrate. The high electric field and the presence of N,N-dimethylformamide, which is used as a solvent, led to reduced silver precursor in the silver nanoparticles. The introduced mat revealed good adsorption ability toward methylene blue dye. The presence of silver nanoparticles resulted in good antibacterial activity for the introduced mat since a piece of the mat could completely eliminate Escherichia coli bacteria. Overall, according to the utilized physiochemical characterizations, the introduced mat can be used as a mask or filter media.
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Hanan M. Al-Youssef,Musarat Amina,Shamshi Hassan,TOUSEEFAMNA,정진원,남기택,김학용 한국고분자학회 2013 Macromolecular Research Vol.21 No.6
This study investigated for the first time the antimicrobial effect of methanolic extract of Grewia mollis Juss (mGM) against Staphylococcus aureus KCCM 11256 (Gram positive) and Escherichia coli KCCM 11234(Gram negative). The minimum inhibitory concentration (MIC) values for each bacterial strain were recorded in a liquid medium. In addition, ultrafine poly(D,L-lactide-co-glycolide) (PLGA) fiber mats containing a methanolic crude extract (7.5 wt%) of Grewia mollis (mGM) were fabricated from the neat PLGA solution by electrospinning. The PLGA ultrafine fiber mat containing mGM were characterized by SEM, FE-SEM, Bio-TEM, TGA, and EDX analyses. Our findings indicate that the incorporation of mGM in the polymer media affected both the morphology and size of the mGM-loaded PLGA ultrafine fibers (UFs). SEM-EDX results confirmed well oriented ultrafine fibers with good incorporation of mGM. Results of the structure characterization indicated that the incorporated mGM interacted strongly with the PLGA matrix and the mechanical properties were effectively improved. Moreover,mGM loaded PLGA ultrafine fiber mats were able to inhibit the growth of the bacterial strains, which indicate that mGM blended PLGA fibers could be used as a potential effective antimicrobial agent for many biomedical applications including wound dressing.
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