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Fabrication and Characterization of Fibrous Polycaprolactone Blended with Natural Green Tea Extracts Using Dual Solvent Systems

Mohd Rashid Ainatul Aqilah Binti, Jaganathan Saravana Kumar, Mohd Khudzari Ahmad Zahran, Ismail Ahmad Fauzi

Autex Research Journal

2022

Vol. 22, no. 4

404--410

Nanofibrous dressings serve as an impeccable candidate in the management of wounds. Nanofibrous composites composed of polycaprolactone (PCL) and green tea using dual solvent systems at different ratios were fabricated through electrospinning. Pure PCL electrospun fibers along with composites were characterized by using scanning electron microscopy (SEM), wettability, water uptake analysis, and Fourier transform infrared spectroscopy (FTIR). SEM indicated that fibrous morphology and the diameter of PCL/green tea were smaller for chloroform/ dimethylformamide (DMF) (601 nm) and acetone/DMF (896 nm) than the pure PCL (673 nm and 1,104 nm for chloroform/DMF and acetone/DMF, respectively). Wettability of the fabricated composites was increased, and pure PCL fibers were slightly more hydrophobic (100°) than PCL/green tea (94°). Water uptake of the composites was enhanced compared with PCL significantly in acetone/DMF. The PCL/green tea nanofibrous wound dressing with enhanced physicochemical properties serves as an indispensable candidate for wound healing applications.

Nanofibrous membrane with fibrin and collagen structures as carriers for skin cells

Bacakova M., Riedel T., Stranska D., Brynda E., Bacakova L.

Engineering of Biomaterials

2014

Vol. 17, no. 128-129

2--4

Sposoby zwiększania sprawności odpylania filtrów włókninowych

Jackiewicz A., Gradoń L.

Inżynieria i Aparatura Chemiczna

2011

Nr 5

42-43

Zaprezentowano dwa sposoby zwiększania skuteczności filtracji cząstek aerozolowych w niehomogenicznych filtrach włókninowych, poprzez zastosowanie dodatkowego mechanizmu separacji - mechanizmu elektrostatycznego ładując włókna filtra, oraz zmieniając strukturę filtra, stosując cieńsze włókna, luźniej upakowane w przestrzeni filtra. Wykazano, iż oba zaproponowane podejścia prowadzą do wzrostu sprawności separacji w filtrach włókninowych.

Two ways used to enhance filtration efficiency of fibrous filters were presented, i.e., applying the additional external force - electrostatic force via charging fibrous and changing the structural parameters of the filter, creating less porosity filters with nanofibrous. It was demonstrated that both this approaches lead to higher separation efficiency of fibrous filters, especially fot the most penetrating particlcs.