The Effect of Sodium chlorophyllin on Polyvinyl Alcohol Electrospun Nanofiber Web

The properties of the electrospun nanofibers ensure their usability for nanobiocomposites and medical applications [1], therefore acquisition methods that would be effective and successfully integrated not only in laboratories, but also in the production are investigated. Sodium chlorophyllin (analogues of food additive E 141 according to the Codex Alimentarius [2]) is a component of neutralized extractive substances derived from spruce foliage. Sodium chlorophyllin contains derivatives of "a" and "b" chlorophyll (chlorines, sodium salts of chlorophylline acids etc.), sodium salts of resinous acids (pimaric-, isopimaric-, abietic- and labdane types), sodium salts of fatty acids (mainly oleic-, stearic- and linoleic). Sodium chlorophyllin is used as active food additive and color, as well as in cosmetics (creams, deodorants etc.). The product shows bacteriostatic, regenerative and deodorant properties [3]. The effect of sodium chlorophyllin concentration (С32H2CN4N) on polyvinyl alcohol (PVA) electrospun nanofiber web are discussed and interpreted by an attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy, atomic force microscopy (AFM), mechanical testing and microbiological test

Electrospun Herbal Extract Derived Polymer Nanocomposites for Medical Applications

Herbal plants have been used in medicine since ancient times due to their health benefits. The research in this field continues to reveal advantages of these plants such as antibacterial activity against multidrug-resistant bacteria and possibility to integrate extracts in fibers by electrospinning. Electrospinning is a simple, yet versatile method of creating polymer-based nanofiber web, which can be used for wound dressings, tissue engineering and drug delivery systems. In production of electrospun nanofibers a solution of biocompatible polymer and a plant extract is needed. Therefore exploration of such composition ingredients is importan

Electrospinning of Transparent Polycarbonate/Cerium Oxide Nanoparticles Composite

In the current report electrospinning technique was performed, starting from a chlorinate solution of polycarbonate using different proportion to obtain transparent wire in micron scale dimension. Polycarbonate formulations were electro spun from conductive solutions with low viscosity, which offered advantages in terms of new optical transparency pathway in polycarbonate wires. The wires versatility in use was confirmed in the photonics fields1 , blended with fluorescence cyanine organic dyes2 , cotton fibres3 and to favourite remarkable mechanical properties for micro rope applications. The optical stability to the solar spectrum was also improved onto polycarbonate wires, by introduction of amorphous cerium oxide nanoparticles with average size in the range of 28 ± 2 nm. Cerium oxide is included in the lanthanide group and due its peculiar electronic configuration with its last d orbital state offer significant advantage to retard on small fibres damage effects caused by infrared radiations of solar spectrum. However, the dispersion of naked nanoparticles remains a critical problem to reduce due to well-known low range attraction force, which induce particles agglomeration behaviour as well as the fast dissolving and rapidly solvent evaporation. Another interesting aspect has been considered during formulation of wire was the amorphous polycarbonate state, which may change during the fast solvent evaporation or by induction with nanoparticles.4 It is present as an amorphous polymer with 2-3 % of crystalline domine. This last matter state condition was avoided to preserve the light transparency; for this reason a parametric approach in electrospinning which involves: voltage, concentration, electrode distance was formulated. Fibres spinning by using a tip electrode and second electrode surface were collect on glass and characterize by infrared absorption in the UV-vis spectroscopy with also AFM characterization. The stability of these micro fibres to the UV light with different polycarbonate/cerium oxide nanoparticles molar ratio were simulated by exposure to the UV lamp by an constant surface irradiation for 12, 24, 36 and 72 hours. Preliminary results acquire by using a UV lamp shown a significant increase of stability in wires polycarbonate composite with cerium oxide 5-10-15% of inclusion