Specific features of the structural organization of composite fibrous membranes polycon and their electrotransport properties

2013 ◽  
Vol 49 (12) ◽  
pp. 1115-1121 ◽  
Author(s):  
Yu. M. Vol’fkovich ◽  
M. M. Kardash ◽  
N. A. Kononenko ◽  
G. V. Aleksandrov ◽  
M. A. Chernyaeva
Keyword(s):  
Structural Organization ◽  
Fibrous Membranes ◽  
Composite Fibrous Membranes

scholarly journals Nanocrystalline Cellulose/Polyvinylpyrrolidone Fibrous Composites Prepared by Electrospinning and Thermal Crosslinking

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Katrina M. Hatch ◽  
Jana Hlavatá ◽  
Katherine Paulett ◽  
Tatsiana Liavitskaya ◽  
Sergey Vyazovkin ◽  
...  
Keyword(s):  
Morphological Changes ◽  
Fibrous Composite ◽  
Weight Ratio ◽  
Nanocrystalline Cellulose ◽  
Process Efficiency ◽  
Swelling Properties ◽  
Thermal Crosslinking ◽  
Swelling Capacity ◽  
Fibrous Membranes ◽  
Composite Fibrous Membranes

Nanocellulose/polyvinylpyrrolidone (nCel/PVP) fibrous composite materials containing rod-like nanocrystalline cellulose particles with the lengths varying in the range from 100 to 2000 nm were prepared by using DC electrospinning. The particle size had a strong effect on the precursor viscosity, process efficiency, and resulting fiber diameter. The thermal crosslinking of nCel/PVP composite nanofibers with up to 1.0 :  8.0 nCel/PVP weight ratio resulted in fibrous membranes with textural, air transport, and mass swelling properties varying significantly with the size of cellulose particles. The presence of nCel particles increased the oxidation resistance of PVP during the crosslinking and affected the morphological changes of nCel/PVP fibrous membranes in aqueous solutions. Particles with the smallest size improved the strength of the membrane but decreased its mass swelling capacity, whereas the larger particles led to a more porous and flexible, but mechanically weaker, membrane structure with a higher swelling ability. Thus, by using the nCel particles of different size and shape, the properties of nCel/PVP composite fibrous membranes can be tailored to a specific application.

Effect of process parameters of manufacturing of composite fibrous membranes on their structure and ion selectivity

2013 ◽  
Vol 53 (7) ◽  
pp. 482-488 ◽  
Author(s):  
M. M. Kardash ◽  
Yu. M. Vol’fkovich ◽  
I. A. Tyurin ◽  
N. A. Kononenko ◽  
D. V. Oleinik ◽  
...  
Keyword(s):  
Process Parameters ◽  
Ion Selectivity ◽  
Fibrous Membranes ◽  
Composite Fibrous Membranes

Effect of Inorganic/Organic Hybrid on the Wettability of Polymer Nanofibrous Membranes

2013 ◽  
Vol 8 (4) ◽  
pp. 155892501300800 ◽  
Author(s):  
Ning Wu ◽  
Ying Sun ◽  
Yanan Jiao ◽  
Li Chen
Keyword(s):  
Water Contact ◽  
Tem Analysis ◽  
New Approach ◽  
Force Microscopy ◽  
Organic Hybrid ◽  
Atomic Force ◽  
Hybrid Nanofibers ◽  
Nanofibrous Membranes ◽  
Fibrous Membranes ◽  
Composite Fibrous Membranes

We report a new approach for improving the wettability of a poly (vinyl acetate) (PVAc) nanofiber membrane. The pure PVAc and hybrid PVAc/titanium dioxide (TiO2) nanofibrous membranes can be obtained by electrospinning the PVA solution and PVA/TiO2 hybrid sol with different TiO2 contents, respectively. The resultant samples were characterized by scanning electron microscopy (SEM), nitrogen volumetric adsorption apparatus (NVAA), water contact angle (WCA), atomic force microscopy (AFM) energy dispersive X-ray spectroscopy (EDX) and transmission electronic microscopy (TEM). It was found that the WCA of composite fibrous membranes was decreased from 109 to 36° as the TiO2 content increased. The AFM, EDX and TEM analysis indicate that the wettability of PVAc/TiO2 hybrid nanofibers was mainly improved by surface roughness and surface hydrophilic groups.

scholarly journals Antibacterial Properties of Nanosilver PLLA Fibrous Membranes

2009 ◽  
Vol 2009 ◽  
pp. 1-5 ◽  
Author(s):  
Lin Li ◽  
Yi Li ◽  
Jiashen Li ◽  
Lei Yao ◽  
Arthur F. T. Mak ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Silver Nanoparticles ◽  
Antibacterial Properties ◽  
Weight Ratio ◽  
Antibacterial Effects ◽  
E Coli ◽  
Fibrous Membranes ◽  
Composite Fibrous Membranes

Nanosilver has been studied as a valuable material for it strong antibacterial effects. In this study, we investigated the antibacterial properties of nano silver Poly-L-Lactic acid (Ag/PLLA) composite fibrous membranes. Ag/PLLA fibrous membranes were prepared with silver nanoparticles having weight ratio of silver nanoparticles to PLLA at 5% (w/w). In vitro antibacterial tests were performed usingEscherichia coli(E. coli) andStaphylococcus aureus(Staph.) to determine the antibacterial capability of the Ag/PLLA fibrous membranes. As the results suggested, Ag/PLLA fibrous membranes showed strong antibacterial properties. Thus, Ag/PLLA fibrous membrane can be used as an antibacterial scaffold for tissue engineering.

scholarly journals Electrospun Poly(L-Lactide-co-ε-Caprolactone)/Polyethylene Oxide/Hydroxyapaite Nanofibrous Membrane for Guided Bone Regeneration

2010 ◽  
Vol 2010 ◽  
pp. 1-8 ◽  
Author(s):  
Gang Wang ◽  
Tianbin Ren ◽  
Chunhong Cao ◽  
Weizhong Yuan ◽  
Ying Song ◽  
...  
Keyword(s):  
Bone Regeneration ◽  
Polyethylene Oxide ◽  
Water Permeability ◽  
Large Diameter ◽  
Guided Bone Regeneration ◽  
Nanofibrous Membrane ◽  
Uniform Size ◽  
Composite Nanofiber ◽  
Fibrous Membranes ◽  
Composite Fibrous Membranes

A series of poly(L-lactide-co-ε-caprolactone)/polyethylene oxide/hydroxyapaite (PLCL/PEO/HA) composite fibrous membranes were prepared by elecrospinning technology for guided bone regeneration. The morphology, water permeability and mechanical properties of the membranes were investigated. The HA nanocrystals can be well distributed in the PLCL/PEO matrix. And the diameter of composite nanofiber is larger than that of pure PLCL. The fibers with uniform size and large diameter were obtained when the contents of PEO and HA were 0.4% and 0.03%, respectively. In this condition, the obtained membrane presents the best water permeability. Furthermore, the nanofibrous membrane with largest tensile strength was obtained when the contents of PEO and HA were 0.5% and 0.03%, respectively.

Preparation and Characterization of Aligned PLLA/PCL/HA Composite Fibrous Membranes

2012 ◽  
Vol 49 (11) ◽  
pp. 946-951 ◽  
Author(s):  
Gui-Ying Liao ◽  
Shengbin Jiang ◽  
Hua Xia ◽  
Kaifeng Jiang
Keyword(s):  
Fibrous Membranes ◽  
Composite Fibrous Membranes
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