scholarly journals Characterization of Electrospun Nanofibers of Cellulose Nanowhisker/Polyvinyl Alcohol Composites

2012 ◽  
Vol 40 (2) ◽  
pp. 71-77 ◽  
Author(s):  
Mi-Jung Cho ◽  
Byung-Dae Park ◽  
John F. Kadla
Keyword(s):  
Polyvinyl Alcohol ◽  
Electrospun Nanofibers ◽  
Cellulose Nanowhisker

Preparation and Characterization of Alginate Electrospun Nanofibers

2014 ◽  
Vol 1685 ◽  
Author(s):  
Tae H. Oh ◽  
Young H. Seo ◽  
Jin W. Cha ◽  
Young M. Im ◽  
Jun S. Hwang ◽  
...  
Keyword(s):  
Optimum Condition ◽  
Polyvinyl Alcohol ◽  
Rheological Properties ◽  
Polymer Blend ◽  
Shear Viscosity ◽  
Viscoelastic Properties ◽  
Electrospun Nanofibers ◽  
Blend Ratio ◽  
Property Change

ABSTRACTTo modify the rigid structure of alginate, polyvinyl alcohol was mixed. Rheological properties and viscoelastic properties of the polymer blend solution were investigated. Complex and shear viscosity and tangent delta of the solution were obtained to find optimum condition of spinning dope. Effect of blend ratio on morphology and property change was investigated.

Production and characterization of catechin-loaded electrospun nanofibers from Azivash gum- polyvinyl alcohol

2020 ◽  
Vol 235 ◽  
pp. 115979 ◽  
Author(s):  
Seyedeh Zahra Hoseyni ◽  
Seid Mahdi Jafari ◽  
Hoda Shahiri Tabarestani ◽  
Mohammad Ghorbani ◽  
Elham Assadpour ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Electrospun Nanofibers

scholarly journals Tunable Photoluminescence of Polyvinyl Alcohol Electrospun Nanofibers by Doping of NaYF4: Eu+3 Nanophosphor

2020 ◽  
Vol 2020 ◽  
pp. 1-8 ◽  
Author(s):  
Sanjeev Kumar ◽  
Garima Jain ◽  
B. P. Singh ◽  
S. R. Dhakate
Keyword(s):  
Polyvinyl Alcohol ◽  
Electrospun Nanofibers ◽  
Excitation Wavelength ◽  
X Ray Diffraction ◽  
Electrospinning Technique ◽  
Transmission Microscopy ◽  
Red Emission ◽  
Uniform Dispersion ◽  
Polymeric Nanofibers

NaYF4: Eu+3 nanophosphor/polyvinyl alcohol (PVA) composite nanofibers have been successfully fabricated using the electrospinning technique. The electrospun polymeric nanofibers were characterized by scanning electron microscopy (SEM), high-resolution transmission microscopy (HRTEM), X-ray diffraction (XRD), photoluminescence (PL), and Raman spectroscopy. The flexible polymeric mats exhibited strong red emission at 724 nm at excitation wavelength of 239 nm. 5% concentration of NaYF4: Eu+3 nanophosphor are embedded homogenously inside the PVA matrix. The strong red emission peak attributed to the presence of Eu+3 ions. The characterization of the mats confirmed the uniform dispersion and tunable photoluminescence properties. These photoluminescent nanofibers (PLNs) could be easily fabricated and potentially useful in solid-state lighting applications.

scholarly journals Fabrication and Characterization of Electrospun Poly(acrylonitrile-co-Methyl Acrylate)/Lignin Nanofibers: Effects of Lignin Type and Total Polymer Concentration

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 992
Author(s):  
Suchitha Devadas ◽  
Saja M. Nabat Al-Ajrash ◽  
Donald A. Klosterman ◽  
Kenya M. Crosson ◽  
Garry S. Crosson ◽  
...  
Keyword(s):  
Methyl Acrylate ◽  
Lignin Content ◽  
Polymer Concentration ◽  
Weight Ratio ◽  
Electrospun Nanofibers ◽  
Polymer Content ◽  
Blend Ratio ◽  
Blend Ratios ◽  
Poly Acrylonitrile

Lignin macromolecules are potential precursor materials for producing electrospun nanofibers for composite applications. However, little is known about the effect of lignin type and blend ratios with synthetic polymers. This study analyzed blends of poly(acrylonitrile-co-methyl acrylate) (PAN-MA) with two types of commercially available lignin, low sulfonate (LSL) and alkali, kraft lignin (AL), in DMF solvent. The electrospinning and polymer blend solution conditions were optimized to produce thermally stable, smooth lignin-based nanofibers with total polymer content of up to 20 wt % in solution and a 50/50 blend weight ratio. Microscopy studies revealed that AL blends possess good solubility, miscibility, and dispersibility compared to LSL blends. Despite the lignin content or type, rheological studies demonstrated that PAN-MA concentration in solution dictated the blend’s viscosity. Smooth electrospun nanofibers were fabricated using AL depending upon the total polymer content and blend ratio. AL’s addition to PAN-MA did not affect the glass transition or degradation temperatures of the nanofibers compared to neat PAN-MA. We confirmed the presence of each lignin type within PAN-MA nanofibers through infrared spectroscopy. PAN-MA/AL nanofibers possessed similar morphological and thermal properties as PAN-MA; thus, these lignin-based nanofibers can replace PAN in future applications, including production of carbon fibers and supercapacitors.

Electrospun PU/MgO/Ag Nanofibers for Antibacterial Activity and Flame Retardency

2021 ◽  
pp. 0887302X2110094
Author(s):  
V. Mamtha ◽  
H. N. Narasimha Murthy ◽  
V. Pujith Raj ◽  
Prashantha Tejas ◽  
C. S. Puneet ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Melting Point ◽  
Protective Clothing ◽  
Electrospun Nanofibers ◽  
Synthesis And Characterization ◽  
Zone Of Inhibition ◽  
Solution Combustion ◽  
E Coli ◽  
Afterglow Time

Antibacterial activity and fire retardation are equally desired for protective clothing. For achieving this, AgNP and MgO are independently researched as nanofillers in Polyurethane based electrospun nanofibers and their synergistic effect is scarcely addressed. This article reports synthesis and characterization of MgO of 70.01 nm and AgNP of 51 to 76 nm by solution combustion and hydrothermal routes respectively and their incorporation in electrospinning of Polyurethane. Flow rate 1 ml/hr, applied voltage 13 kV, tip to collector distance 15 cm were adopted for the electrospinning. Nanofibers of 65 nm were obtained for PU/MgO (3 wt. %) and 106 nm for PU/MgO (3 wt. %)/Ag (1 wt. %). Addition of MgO increased the melting point, after flame time and afterglow time. Incorporation of AgNP improved antibacterial activity. PU/MgO/Ag (2 wt. %) exhibited zone of inhibition of 2.1 cm and 3 cm against E. Coli and S. Aureus, respectively.

Fabrication and characterization of electrospun nanofibers of high DP natural cotton lines cellulose

2011 ◽  
Vol 12 (3) ◽  
pp. 345-351 ◽  
Author(s):  
Chaorong Li ◽  
Rui Chen ◽  
Xiaoqiang Zhang ◽  
Jie Xiong ◽  
Yingying Zheng ◽  
...  
Keyword(s):  
Electrospun Nanofibers ◽  
Fabrication And Characterization
Sign in / Sign up

Export Citation Format

Share Document