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

2012 ◽  
Vol 7 (1) ◽  
pp. 155892501200700 ◽  
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.

Characterization of Electrospun Poly(Lactic Acid)/polyaniline Blend Nanofibers

2011 ◽  
Vol 332-334 ◽  
pp. 317-320 ◽  
Author(s):  
Hui Qin Zhang
Keyword(s):  
Lactic Acid ◽  
Composite Nanofibers ◽  
Weight Ratio ◽  
Electrospinning Process ◽  
Poly Lactic Acid ◽  
X Ray Diffraction ◽  
Sem Images ◽  
X Ray ◽  
Ft Ir

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.

scholarly journals Fabrication and Characterization of Polyvinyl Chloride/Copolyester/Nanoclay Composite Nanofiber

2021 ◽  
Vol 33 (8) ◽  
pp. 1868-1874
Author(s):  
S. Jasmine ◽  
D. Reuben Jonathan ◽  
J. Sidharthan ◽  
D. Roopsingh
Keyword(s):  
Polyvinyl Chloride ◽  
Room Temperature ◽  
Composite Nanofibers ◽  
Schmidt Reaction ◽  
Electrospinning Method ◽  
Composite Nanofiber ◽  
Nmr Techniques ◽  
Ft Ir ◽  
Acid Catalyzed

Four random copolyesters were prepared by the polycondensation reaction of diols namely 1,5-dihydroxyanthraquinone, 4,4′-oxybis(benzoic acid) and variable chalcone diol. Four chalcone diols were produced by acid catalyzed Claisen-Schmidt reaction at room temperature. These random copolyesters were elucidated by solubility tests and viscosity measurements. The FT-IR, 1H & 13C NMR techniques were applied to establish the repeating units present in the copolyester backbone. Electrospinning method was employed to derive polyvinyl chloride-copolyester-nanoclay composite nanofiber from tetrahydrofuran medium. Scanning electron microscopy (SEM) was utilized to examine the morphology of the nanofibers. These composite nanofibers are expected to be a potential biomaterial of greater significance.

The Preparation and Visible Light Photocatalytic Activity of TiO2/Co2+ Nanofibers

2013 ◽  
Vol 772 ◽  
pp. 371-375 ◽  
Author(s):  
Chen Xiang Xu ◽  
Yi Kai Shi ◽  
Mi Zhou ◽  
Xin Qian ◽  
Xiao Feng Ye
Keyword(s):  
Visible Light ◽  
Composite Nanofibers ◽  
Anatase Phase ◽  
Chemical Components ◽  
Electrospun Fibers ◽  
Photocatalytic Activities ◽  
Ft Ir ◽  
Two Temperatures ◽  
Visible Light Photocatalytic ◽  
Calcination Treatment

TiO2/Co2+ composite nanofibers were prepared by using the electrospun fibers of PVP/ Ti (OiPr)4/Co (NO3)2 composite as precursor, and through calcination treatment. The chemical components, structures and morphology were characterized by TGA, FT-IR, XRD, SEM, respectively. The photocatalytic activities of the catalysts were investigated by photocatalystic degradation of Rhodamine B under visible-light irradiation. It was found that the TiO2/Co2+ composite nanofibers calcined at 600 °C which was the anatase phase, showed higher photocatalytic activities than those calcined at other two temperatures. This result was expected as a new morphology of photocatalysts to degrade the organic pollutants in the sun.

The Preparation and Visible Light Photocatalytic Activity of ZnO-TiO2 Nanofibers

2012 ◽  
Vol 472-475 ◽  
pp. 3441-3444 ◽  
Author(s):  
Qian Xiong ◽  
Mi Zhou ◽  
Xin Qian
Keyword(s):  
Visible Light ◽  
Composite Nanofibers ◽  
Anatase Phase ◽  
Rutile Phase ◽  
Chemical Components ◽  
Photocatalytic Activities ◽  
Ft Ir ◽  
Two Temperatures ◽  
Visible Light Photocatalytic ◽  
Calcination Treatment

ZnO-TiO2 composite nanofibers were prepared by using the electrospun fibers of PVP/ZnSO4/ Ti(OiPr)4 composite as precursor, and through calcination treatment. The chemical components, structures and morphology were characterized by FT-IR, XRD, SEM, respectively. The photocatalytic activities of the catalysts were investigated by photocatalystic degradation of Rhodamine B under visible-light irradiation. It was found that the ZnO-TiO2 composite nanofibers photocatalyst calcined at 600 °C which was mixed the anatase phase and rutile phase, showed higher photocatalytic activities than those calcined at other two temperatures. This result was expected as a new morphology of photocatalysts to degrade the organic pollutants in the sun.

Degradable cellulose acetate/poly-l-lactic acid/halloysite nanotube composite nanofiber membranes with outstanding performance for gel polymer electrolytes

2016 ◽  
Vol 4 (31) ◽  
pp. 12136-12143 ◽  
Author(s):  
Ming Zhu ◽  
Jinle Lan ◽  
Chunyu Tan ◽  
Gang Sui ◽  
Xiaoping Yang
Keyword(s):  
Lactic Acid ◽  
Lithium Ion Batteries ◽  
Cellulose Acetate ◽  
Polymer Electrolytes ◽  
Lithium Ion ◽  
Gel Polymer Electrolytes ◽  
Halloysite Nanotube ◽  
Composite Nanofiber ◽  
Nanofiber Membranes

The biodegraded cellulose acetate (CA)/poly-l-lactic acid (PLLA)/halloysite nanotube composite nanofiber membranes were fabricated for the preparation of gel polymer electrolytes (GPEs) used in lithium-ion batteries.

Biodegradable Electrospun Fibers Containing the Compound Antihypertensive Drugs

2011 ◽  
Vol 332-334 ◽  
pp. 1218-1222 ◽  
Author(s):  
An Fang Wei ◽  
Juan Wang ◽  
Xue Qian Wang ◽  
Qu Fu Wei ◽  
Da Yin Hou
Keyword(s):  
Antihypertensive Drugs ◽  
Amorphous State ◽  
Heat Stability ◽  
Composite Fiber ◽  
Chemical Components ◽  
Composite Fibers ◽  
Biodegradable Composite ◽  
Ft Ir ◽  
Pure Drug ◽  
Better Than

In this study, the biodegradable composite fiber contained different ratios of the compound antihypertensive drugs were electrospun.The morphology, chemical components, heat stability of the composite fibers were investigated.The results showed the diameters of the composite fibers decreased and their distributions tended to be much evener with the increase of the compound antihypertensive drugs content. Fourier Transform Infrared (FT-IR) showed the chemical components of the compound antihypertensive drugs had not changed when it was electrospun into the composite fibers. DSC results showed that the drugs lost their intrinsic crystallization and existed in amorphous state in the composite fibers and the heat stability of the composite were better than the pure drug.

Study on Modified Rapeseed Oil/Montmorillonite Nanocomposites

2010 ◽  
Vol 123-125 ◽  
pp. 1291-1294 ◽  
Author(s):  
Bin Lü ◽  
Jian Zhong Ma ◽  
Dang Ge Gao ◽  
Lei Hong
Keyword(s):  
Rapeseed Oil ◽  
Fourier Transforms ◽  
Raw Materials ◽  
Infrared Spectrometry ◽  
Emulsifying Properties ◽  
X Ray Diffraction ◽  
Layer Spacing ◽  
Transmission Electron ◽  
Ft Ir ◽  
Better Than

Modified rapeseed oil(MRO) was prepared by using rapeseed oil, ethylene diamine and acrylic acid as the raw materials. Modified rapeseed oil/montmorillonite(MRO/MMT) nanocomposite was prepared by using modified rapeseed oil and montmorillonite. The emulsifying properties of MRO and MRO/MMT were determined respectively. Fourier transforms infrared spectrometry (FT-IR) and Transmission Electron microscope (TEM) results showed that MRO/MMT was prepared successfully. X-ray diffraction (XRD) results showed that modified rapeseed oil could smoothly enter the interlayer of montmorillonite, and modified the montmorillonite; with an increase in the amount of montmorillonite, the layer spacing of montmorillonite in the MRO/MMT lower after the first increase. The results of emulsifying properties indicated that emulsifying properties of MRO/MMT was better than MRO.

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