Morphology, microstructure, and electrical properties of poly(D,L-lactic acid)/carbon nanocapsule composite nanofibers

In this study, composite nanofibers of polyaniline doped with dodecylbenzene sulfonic acid (PANI-DBSA) and Poly(lactic acid) (PLA) were prepared via an electrospinning process. The surface morphology, thermal properties and crystal structure of PLA/PANI-DBSA nanoﬁbers are characterized using Fourier transform infrared spectroscopy (FT-IR), wide-angle x-ray diffraction (WAXD) and scanning electron microscopy (SEM). SEM images showed that the morphology and diameter of the nanofibers were affected by the weight ratio of blend solution.

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Morphology and Surface Properties of Poly (L-lactic acid)/Captopril Composite Nanofiber Membranes

Journal of Engineered Fibers and Fabrics ◽

10.1177/155892501200700115 ◽

2012 ◽

Vol 7 (1) ◽

pp. 155892501200700 ◽

Cited By ~ 3

Author(s):

Anfang Wei ◽

Juan Wang ◽

Xueqian Wang ◽

Dayin Hou ◽

Qufu Wei

Keyword(s):

Lactic Acid ◽

Composite Nanofibers ◽

Chemical Components ◽

Pore Width ◽

Surface Areas ◽

Composite Nanofiber ◽

Mass Fractions ◽

Ft Ir ◽

Nanofiber Membranes ◽

Better Than

In this study, Poly (L-lactic acid)/Captopril composite nanofiber membranes were electrospun for drug delivery. Different mass fractions of Poly (L-lactic acid), different ratios of Captopril and the influences of PEG4000 added in the spinning solution are discussed. The morphology, chemical components, the surface areas and pore sizes, wettability of the composite nanofiber membranes were investigated. The results showed that the diameters of the composite nanofibers increased with the increase of Poly (L-lactic acid) mass fractions, the diameters decreased with the increase of Captopril content as well as the addition of the surfactant. Fourier Transform Infrared (FT-IR) showed the chemical components of Captopril remained unchanged when it was electrospun into the composite nanofibers. The surface areas pore width and pore volume of the composite nanofibers became a little larger than those of poly (L-lactic acid) nanofibers, and the wettability of the composite nanofiber membranes was better than those of poly (L-lactic acid) nanofiber membranes. Wettability was improved by an increase of the drug load amount.

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Electrical Properties of Conductive Nylon66/Graphene Oxide Composite Nanofibers

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2015.10273 ◽

2015 ◽

Vol 15 (8) ◽

pp. 5718-5722 ◽

Cited By ~ 4

Author(s):

R. Nirmala ◽

R. Navamathavan ◽

Hak Yong Kim ◽

Soo-Jin Park

Keyword(s):

Graphene Oxide ◽

Electrical Properties ◽

Composite Nanofibers ◽

Oxide Composite

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Preparation and Electrical Properties of the MWNT/Polymer Nanocomposite Fibers

MRS Proceedings ◽

10.1557/proc-0963-q20-24 ◽

2006 ◽

Vol 963 ◽

Author(s):

Guan Wang ◽

Zhongkui Tan ◽

Xueqing Liu ◽

Vladimir Samuilov ◽

Michael Dudley

Keyword(s):

Carbon Nanotubes ◽

Electrical Properties ◽

Composite Nanofibers ◽

Polymer Nanocomposite ◽

Composite Fiber ◽

Cooh Group ◽

Temperature Dependent ◽

Multiwalled Carbon ◽

Functionalized Carbon Nanotubes ◽

Nanocomposite Fibers

ABSTRACTAn oxidation method has been applied to functionalize multiwalled carbon nanotubes with carboxylic acid (-COOH) group. Functionalized carbon nanotubes (f-MWNT) were used for the fabrication of conducting nanocomposite fibers by electrospinning, in comparison with the composite nanofibers made of un-functionalized carbon nanotubes (u-MWNT). Our results showed that the addition of f-MWNTs into polymer solution could increase the compatibility of MWNTs with the polymer matrix, and thus result in composite nanofibers with uniform diameters. Alignment of the composite nanofibers was achieved by using a rotating drum as the collector. F-MWNTs were found to align parallel to the axis direction of the nanofibers. Temperature-dependent DC electrical properties of a single composite fiber were investigated by a two-probe method. It was shown that the conductivity of the material could be significantly improved above a percolation threshold. The conductivity could be of ten orders of magnitude higher than the pure PVAc.

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APPLICATION OF THE DIFFUSION HYPOTHESIS TO MEMBRANE POTENTIALS

The Journal of General Physiology ◽

10.1085/jgp.6.6.759 ◽

1924 ◽

Vol 6 (6) ◽

pp. 759-768

Author(s):

Cecil D. Murray

Keyword(s):

Lactic Acid ◽

Electrical Properties ◽

Thermodynamic Properties ◽

Aqueous Solutions ◽

Distribution Coefficients ◽

Amyl Alcohol ◽

Simple Diffusion ◽

Phase Reversal ◽

Ionic Mobilities ◽

Special Case

A system consisting of two aqueous solutions, containing equal concentrations of lactic acid, but different concentrations of Na lactate, separated by a layer of amyl alcohol has been described. This system exhibits electrical properties ranging (as the concentration of NaL is increased) from those characteristic of a simple Donnan equilibrium to those characteristic of simple diffusion. The fact that the Donnan P.D. can be treated as a special case of a diffusion potential has been emphasized. The experiments call attention to the effect of the thermodynamic properties of the membrane, and it is suggested that such properties as conductivities, ionic mobilities, and distribution coefficients in membranes of any sort should be investigated. The experiments afford an interesting example of "phase reversal."

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