Preparation and Characterization of Shellac/Polyvinylpyrrolidone Nanofiber as a Material for Medical Application

2013 ◽  
Vol 652-654 ◽  
pp. 278-281 ◽  
Author(s):  
Thanachod Thammachat ◽  
Sompoch Tabcharoen ◽  
Sitthiphong Soradech
Keyword(s):  
Medical Application ◽  
Electrospinning Process ◽  
Ethanol Solution ◽  
Fiber Formation ◽  
Solution Properties ◽  
Simple Method ◽  
Composite Polymers ◽  
Ft Ir ◽  
Near Future

Nanofiber are defined as diameter less than 1 micron is under development for future medical application. The simple method was used to prepare a nonwoven in nanofiber of shellac (SHL) and polyvinylpyrrolidone (PVP) is electrospinning machine. The objective of the present study was to investigate the effect of electrospinning process on the physical properties. The SHL/ PVP nanofiber was prepared by dissolving in various rations of SHL/PVP in ethanol solution. Properties of obtained SHL/PVP nanofibers were elucidated. The results demonstrated that nanofibers of SHL/PVP were easily formed after spinning with diameter ranging from a few nanometers to several micrometers. SHL and PVP blended fiber could be formed by the hydrogen bonds attributing to the change in physicochemical properties via FT-IR. This study indicated that a simple method to create nanofiber nonwovens of multiple dissimilar composite polymers providing an approach for controlling diameter size distribution independently from fiber formation. Hence, the knowledge gained should support the development of the product for medical application in near future.

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.

Synthesis and Characterization of ZrO2/Graphene Nanocomposite Materials

2012 ◽  
Vol 531 ◽  
pp. 161-164 ◽  
Author(s):  
Zong Hua Wang ◽  
Fu Qiang Zhu ◽  
Jan Fei Xia ◽  
Fei Fei Zhang ◽  
Yan Zhi Xia ◽  
...  
Keyword(s):  
High Surface ◽  
High Surface Area ◽  
Nitrogen Adsorption ◽  
X Ray Diffraction ◽  
Simple Method ◽  
Transmission Electron ◽  
Ft Ir ◽  
Graphene Nanocomposite ◽  
Adsorption Desorption

Zirconia/graphene (ZrO2/graphene) nanocomposite has been successfully synthesized by a simple method. The as-prepared nanocomposite was characterized using transmission electron microscopy (TEM), FT-IR spectroscopy, power X-ray diffraction (XRD) and nitrogen adsorption-desorption. It was found that tetragonal ZrO2was uniformly deposited on graphene, which resulted in the formation of two-dimensional nanocomposite, it showed a high surface area of 165 m2/g.

Preparation and Characterization of PVA/Boron Polymer Produced by an Electrospinning Technique.

e-Polymers ◽  
2007 ◽  
Vol 7 (1) ◽  
Author(s):  
I. Uslu ◽  
H. Daştan ◽  
A. Altaş ◽  
A. Yayli ◽  
O. Atakol ◽  
...  
Keyword(s):  
Boron Oxide ◽  
Vinyl Alcohol ◽  
Electrospinning Process ◽  
Poly Vinyl Alcohol ◽  
Boron Addition ◽  
Electrospinning Technique ◽  
Boron Doped ◽  
Ft Ir ◽  
Pva Solutions

Abstract In this study, poly(vinyl alcohol) were cross-linked with boron in varying concentrations and blend fibers were obtained with diameters ranging from 0.3 μ to 4.0 μm with the use of electrospinning process. The resulting product was characterized by SEM, DSC, and FT-IR techniques. There is no beading tendency in either boron doped or undoped fibers. When the amount of boric acid in PVA solutions was increased the conductivity of the polymer decreased. The data indicated the existence of boron oxide in the polymeric structure and the formation of B-O-C bond. SEM micrographs reveal that higher viscosity favors the formation of thicker fibers. Boron addition seems to disturb the easy detachment of the fibers from the tip of the Taylor Cone

Preparation and Characterization of Shellac Fiber as a Novel Material for Controlled Drug Release

2010 ◽  
Vol 152-153 ◽  
pp. 1232-1235 ◽  
Author(s):  
Thanachod Thammachat ◽  
Pornsak Sriamornsak ◽  
Manee Luangtana-Anan ◽  
Jurairat Nunthanid ◽  
Chutima Limmatvapirat (1) ◽  
...  
Keyword(s):  
Feeding Rate ◽  
Controlled Drug Release ◽  
Electrospinning Process ◽  
Critical Parameters ◽  
Fiber Structure ◽  
Continuous Fiber ◽  
Novel Material ◽  
Near Future ◽  
Crucial Parameter

The aim of this study was to investigate the effect of electrospinning process on the physical properties of fibers made from shellac. Electrospun shellac fiber was prepared by dissolving shellac in ethanol and then transferred to the electrospinning system. The influences of process parameters; including electric field voltage, tip to collector gap, feeding rate and concentration of shellac solutions; on the spinnability and properties of obtained shellac fibers were elucidated. The result demonstrated that micro-nano fibers of shellac were easily formed after spinning. The concentration of shellac solution was a crucial parameter that determined the spinnability. The electro-sprayed particles of shellac were achieved at the concentration of 35% w/w and lower while the electrospun fibers was formed in the concentration range of 40-45 % w/w. SEM pictures demonstrated that the beaded fiber structure obtained at 40-43% w/w was changed to the continuous fiber structure at 45% w/w. The diameter of fiber showed a tendency to increase while the size distribution of diameter was narrower as increasing voltage. The other optimized electrospinning parameters including feeding rate, tip to collector gap were 0.5-2 ml/h and 15-20 cm, respectively. In conclusion, the study demonstrated the critical parameters that determined the properties of required fibers. The knowledge gained should support the development of the drug incorporated electrospun shellac fiber in near future.

Synthesis and Characterization of GO-Chit-Ni Nanocomposite as a Recoverable Nanocatalyst for Reducing Nitroarenes in Water

2020 ◽  
Vol 17 (7) ◽  
pp. 523-531
Author(s):  
Mosayeb Sarvestani ◽  
Roya Azadi
Keyword(s):  
Fourier Transforms ◽  
Considerable Change ◽  
Environmentally Benign ◽  
X Ray Diffraction ◽  
Simple Method ◽  
Transmission Electron ◽  
Ir Transmission ◽  
Aryl Amines ◽  
Ft Ir

In the present study, nickel nanoparticles (Ni-NPs) immobilized on graphene oxide-chitosan (GO-Chit-Ni) have been synthesized and characterized as a catalyst for reduction of nitroarenes in water. For this purpose, GO has been functionalized with chitosan (GO-Chit). Then, Ni-NPs were immobilized on the surface of GO-Chit using a simple method. The GO-Chi-Ni nanocomposites were characterized using Fourier Transforms Infrared Spectroscopy (FT-IR), Transmission Electron Microscopy (TEM), X-Ray Diffraction Measurements (XRD), and Atomic Adsorption Spectrometry (AAS). The GO-Chi-Ni nanoparticles demonstrated appropriate catalytic activity in reducing nitroarenes to aryl amines in the existence of sodium borohydride (NaBH4) aqueous solution as a hydrogen source at 80oC. This catalytic system applies environmentally benign water as a solvent that is cheap, easily accessible, non-toxic, non-volatile, non-flammable and thermally stable. This type of catalyst can be applied several times with no considerable change in its performance.

scholarly journals Synthesis of Amid-MCM-41-SO3H Electrospun Nanofiber Mat: Candidate for Trapping of Microorganisms

2021 ◽  
Author(s):  
Mostafa Golshekan ◽  
Hossein Hemmati ◽  
Mohammad Taghi Ashoobi ◽  
Khatereh Asadi
Keyword(s):  
Electrospinning Process ◽  
Air Filtration ◽  
Nano Composite ◽  
Xrd Pattern ◽  
Significant Step ◽  
Ft Ir ◽  
Surface Active ◽  
Mcm 41 ◽  
Ft Ir Spectroscopy

Abstract In the present study, amid-MCM-41-SO3H nano-composite is fabricated through the electrospinning process, which will a significant step toward air filtration for removal of microrganism from air particularly ICU hospital. The filtration mechanism of the amid-MCM-41-SO3H composite is based on the interaction of nanofiber functionalized group (-SO3H) with surface active groups of lipids and protein of microorganisms such as SARS-CoV-2. For the characterization of the synthesized nano-composite, various instrumentation methods were used. the SEM and TEM showed that the MCM-41- SO3H nanoparticles were uniformly distributed throughout the fiber length. Fourier Transform Infrared (FT-IR) spectroscopy confirms with the synthesized Amid-MCM-41-SO3H filter. X-ray Diffractometry (XRD) pattern indicated that the structure of the MCM-41-SO3H composite was well-preserved after modification. These results suggested that the amid-MCM-41-SO3H composite has higher performance in interaction with similar NPs of virus.

scholarly journals A new method of processing CO2 and magnesite slag simultaneously

2019 ◽  
Vol 84 (1) ◽  
pp. 69-82
Author(s):  
Na Yang ◽  
Ping Ning ◽  
Kai Li ◽  
Junya Wang
Keyword(s):  
Flue Gas ◽  
Co2 Adsorption ◽  
Fluorescence Analysis ◽  
Simple Method ◽  
X Ray ◽  
Ft Ir ◽  
Co2 Adsorption Capacity ◽  
Co2 Capture Capacity ◽  
Capture Capacity

Calcining magnesite slag to capture CO2 is a new and simple method of processing CO2 and magnesite slag simultaneously. In this work, the CO2 capture capacity by calcined magnesite slag in wet flue gas simulated by adding water vapour was investigated. The magnesite slag exhibits excellent CO2 adsorption performance, with 3.01 mmol/g CO2 adsorption capacity, which is reduced to 2.18 mmol/g after 8 cycles and is obvious superior to magnesite. The structure and characterization of the magnesite slag are examined by XRF, FT-IR, TGDSC, XRD, CO2-TPD and BET. It can be confirmed by X-ray fluorescence analysis that the key component of magnesite slag is MgSiO3 and MgCO3. The results of this work indicate that the magnesite slag is an available adsorbent for CO2 adsorption after calcination.

scholarly journals Synthesis and Characterization of Chemical Compounds Derived From Benzohydrazide and Evaluation of Their Antibacterial Activities

2021 ◽  
Vol 8 (1) ◽  
pp. 5-10
Author(s):  
Maryam Alizadeh ◽  
Ashraf Kariminik ◽  
Ali Akbari
Keyword(s):  
Pathogenic Bacteria ◽  
Antimicrobial Agents ◽  
Choline Chloride ◽  
Antibacterial Activities ◽  
Simple Method ◽  
Major Health Problem ◽  
Ft Ir

Background: The antimicrobial resistance of pathogenic bacteria has emerged as a major health problem in recent years. Extensive research has been conducted to find new antimicrobial agents. Objectives: The aim of this study was to examine the antibacterial activities of benzohydrazide derivatives. Methods: Manganese hydrogen sulfate choline chloride was applied in a simple method for synthesizing benzohydrazide derivatives. Antibacterial activities of the derivatives were assessed against Staphylococcus aureus, Escherichia coli, Enterococcus faecalis, Bacillus subtilis, diphtheroids, Salmonella enterica, Serratia marcescens, Pseudomonas aeruginosa, and Klebsiella pneumoniae. The structure of the synthesized compounds was determined employing 1 H/13C NMR and Fourier-transform infrared (FT-IR) spectroscopy. The reactions were carried out in choline chloride dissolved in water at room temperature. Results: The results of this study showed that benzohydrazide derivatives had very desired antibacterial activities against the assessed bacteria. Conclusions: Further investigations are required to assess the safety and efficacy of benzohydrazide derivatives as antibacterial agents in vivo and in vitro.

Spectral Investigation on the Growth and Characterization of NLO Crystals of Thiourea Succinic Acid Single Crystal.

2015 ◽  
Vol 2 (2) ◽  
pp. 70-73
Author(s):  
Kannan.P ◽  
Thambidurai.S ◽  
Suresh.N
Keyword(s):  
Single Crystal ◽  
Succinic Acid ◽  
Slow Evaporation Technique ◽  
Absorption Studies ◽  
Dta Analysis ◽  
Evaporation Technique ◽  
Ft Ir ◽  
Ir Spectroscopic ◽  
Thermal Stability Of

Growth of optically transparent single crystals of thiourea succinic acid (TUSA) was grown successfully from aqueous solution by slow evaporation technique. The crystal structure was elucidated using the single crystal XRD. The various functional groups and the modes of vibrations were identified by FT-IR spectroscopic analysis. The optical absorption studies indicate that the optical transparency window is quite wide making its suitable for NLO applications. Thermal stability of the crown crystal carried out by TGA-DTA analysis.

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