scholarly journals Electrospinning of Cellulose Nanocrystal-Reinforced Polyurethane Fibrous Mats

Polymers ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1021
Author(s):  
Alexandre Redondo ◽  
Daseul Jang ◽  
LaShanda T. J. Korley ◽  
Ilja Gunkel ◽  
Ullrich Steiner
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Cellulose Nanocrystal ◽  
Wide Angle ◽  
Fiber Alignment ◽  
X Ray ◽  
X Ray Scattering ◽  
Aligned Fibers ◽  
Scanning Electron ◽  
Strain Direction

We report the electrospinning of mechanically-tunable, cellulose nanocrystal (CNC)-reinforced polyurethanes (PUs). Using high-aspect ratio CNCs from tunicates, the stiffness and strength of electrospun PU/CNC mats are shown to generally increase. Furthermore, by tuning the electrospinning conditions, fibrous PU/CNC mats were created with either aligned or non-aligned fibers, as confirmed by scanning electron microscopy. PU/CNC mats having fibers aligned in the strain direction were stiffer and stronger compared to mats containing non-aligned fibers. Interestingly, fiber alignment was accompanied by an anisotropic orientation of the CNCs, as confirmed by wide-angle X-ray scattering, implying their alignment additionally benefits both stiffness and strength of fibrous PU/CNC nanocomposite mats. These findings suggest that CNC alignment could serve as an additional reinforcement mechanism in the design of stronger fibrous nanocomposite mats.

Equilibrium, FTIR, scanning electron microscopy and small wide angle X-ray scattering studies of chromates adsorption on modified bentonite

2005 ◽  
Vol 740 (1-3) ◽  
pp. 203-211 ◽  
Author(s):  
Marek Majdan ◽  
Oksana Maryuk ◽  
Stanisław Pikus ◽  
Elzbieta Olszewska ◽  
Ryszard Kwiatkowski ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Wide Angle ◽  
Modified Bentonite ◽  
X Ray ◽  
X Ray Scattering ◽  
Scanning Electron ◽  
Ray Scattering

scholarly journals Calcium Detection in Secretion Granules of Avian Oviduct by Scanning Electron Microscopy (SEM) and Energy-dispersive X-Ray Microanalysis (EDX)

1983 ◽  
Vol 31 (1A_suppl) ◽  
pp. 219-221 ◽  
Author(s):  
Takashi Makita ◽  
Masanori Hatsuoka ◽  
Yukiko Sugi
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Energy Dispersive ◽  
Shell Gland ◽  
Wide Angle ◽  
X Ray ◽  
Secretion Granules ◽  
Backscattered Electron ◽  
Calcium Detection ◽  
Scanning Electron

Secretion granules in the shell gland, isthmus, and albumin-secreting region of the hen oviduct were analyzed with WET-scanning electron microscopy (SEM) and EDX, a combination of wide-angle backscattered electron detector (BED) and energy-dispersive X-ray microanalyzer (EDX). Glutaraldehyde-fixed but unhydrated, unstained, and uncoated samples were analyzed; Ca was localized in all secretion granules in all three sections of the hen oviduct studied.

Nanostructure of the neurocentral growth plate: Insight from scanning small angle X-ray scattering, atomic force microscopy and scanning electron microscopy

Bone ◽  
2006 ◽  
Vol 39 (3) ◽  
pp. 530-541 ◽  
Author(s):  
Mathias Hauge Bünger ◽  
Morten Foss ◽  
Kurt Erlacher ◽  
Mads Bruun Hovgaard ◽  
Jacques Chevallier ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Atomic Force Microscopy ◽  
Growth Plate ◽  
Small Angle ◽  
X Ray ◽  
Force Microscopy ◽  
X Ray Scattering ◽  
Atomic Force ◽  
Scanning Electron

Investigation of Biocomposites Containing Glycerol-Plasticized Soy Protein and Kaolin

2011 ◽  
Vol 287-290 ◽  
pp. 1712-1717
Author(s):  
Hua Feng Tian ◽  
Guo Zhi Xu ◽  
Biao Yang
Keyword(s):  
Electron Microscopy ◽  
Thermal Stability ◽  
Scanning Electron Microscopy ◽  
Soy Protein ◽  
Original Structure ◽  
Wide Angle ◽  
X Ray Diffraction ◽  
Protein Matrix ◽  
X Ray ◽  
Scanning Electron

A series of soy protein/kaolin nanocomposites have been successfully prepared via solution mixing and then extrusion. The structure and the properties of the nanocomposite plastics were characterized by wide-angle X-ray diffraction (WAXD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), water uptake as well as mechanical testing. WAXD revealed that the nano-sized kaolin filler in soy protein matrix retained the original structure as the pristine kaolin. In view of the results of SEM, kaolin distributed in the protein matrix homogeneously and exhibited fine adhesion with soy protein. The incorporation of kaolin into glycerol-plasticized soy protein led to great improvements of mechanical and water resistant properties. The thermal stability was also enhanced by the incorporation of kaolin as revealed by TGA characterization.

Synthesis of Ultra-Fine Conducting Polyaniline Micro/Nanotubes Using Fiber Template and Their NH3 Gas Sensitivity

2007 ◽  
Vol 7 (12) ◽  
pp. 4515-4521 ◽  
Author(s):  
Bo Xue ◽  
Shaoyan Qi ◽  
Jian Gong ◽  
Yu Gao ◽  
Shuang Yao ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Wide Angle ◽  
X Ray Diffraction ◽  
Gas Sensitivity ◽  
X Ray ◽  
Transmission Electron ◽  
Conducting Polyaniline ◽  
Inner Diameter ◽  
Scanning Electron

We have recently fabricated ultra-fine conducting polyaniline (PANI) tubes with high gas sensitivity. This route includes two steps. Firstly, aniline polymerizes on the surface of a suitable fiber template prepared by electrospun nitrocellulose (NC). Then, the NC fiber template is dissolved and the ultra-fine PANI tubes are obtained. The structure of the conducting PANI tubes is characterized by IR spectrum and wide-angle X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results indicate that the PANI shows the shape of ultra-fine tubes with average inner diameter of 250–350 nm. The wall thickness of the ultra-fine PANI tubes increases with increasing the content of oxidant. The conductivity of the doped PANI tubes is about 6 9 × 10−2 S. The results of gas sensitivity of the ultra-fine PANI tubes indicate that the PANI tubes can act as "electronic nose" to detect toxic NH3 gas below 20 ppm.

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