Modification of textile acetate yarn with polyethylene oxide

1975 ◽  
Vol 6 (4) ◽  
pp. 444-445
Author(s):  
M. Sh. Tairov ◽  
M. V. Polovnikova ◽  
D. I. Kalandarov ◽  
P. I. Baboshkin ◽  
Z. Z. Gulombaev ◽  
...  
Keyword(s):  
Polyethylene Oxide ◽  
Acetate Yarn

Structures Formed by Cryoprotective Agents Used in Freezc-Etching

1971 ◽  
Vol 29 ◽  
pp. 448-449
Author(s):  
G. G. Cocks ◽  
C. E. Cluthe
Keyword(s):  
Aqueous Solution ◽  
Polyethylene Oxide ◽  
Liquid Nitrogen Temperature ◽  
Ice Crystals ◽  
Etching Technique ◽  
Structural Constituent ◽  
Cryoprotective Agents ◽  
Quick Freezing ◽  
Freeze Etching ◽  
Fractured Surface

The freeze etching technique is potentially useful for examining dilute solutions or suspensions of macromolecular materials. Quick freezing of aqueous solutions in Freon or propane at or near liquid nitrogen temperature produces relatively large ice crystals and these crystals may damage the structures to be examined. Cryoprotective agents may reduce damage to the specimem, hut their use often results in the formation of a different set of specimem artifacts.In a study of the structure of polyethylene oxide gels glycerol and sucrose were used as cryoprotective agents. The experiments reported here show some of the structures which can appear when these cryoprotective agents are used.Figure 1 shows a fractured surface of a frozen 25% aqueous solution of sucrose. The branches of dendritic ice crystals surrounded hy ice-sucrose eutectic can be seen. When this fractured surface is etched the ice in the dendrites sublimes giving the type of structure shown in Figure 2. The ice-sucrose eutectic etches much more slowly. It is the smooth continuous structural constituent surrounding the branches of the dendrites.

Chitosan/Polyethylene Oxide (PEO) Filled Carbonized Wood Fiber Conductive Composite Film

2020 ◽  
Vol 1010 ◽  
pp. 638-644
Author(s):  
Mohd Pisal Mohd Hanif ◽  
Abd Jalil Jalilah ◽  
Mohd Fadzil Hanim Anisah ◽  
Arumugam Tilagavathy
Keyword(s):  
Electrical Conductivity ◽  
Tensile Strength ◽  
Polyethylene Oxide ◽  
Biomedical Applications ◽  
Wood Fiber ◽  
Conductive Polymer ◽  
Renewable Resource ◽  
Blend Films ◽  
Conductive Composite Film ◽  
Carbonized Wood

Biopolymer-based conductive polymer composites (CPCs) would open up various possibilities in biomedical applications owing to ease of processing, renewable resource and environmentally friendly. However, low mechanical properties are a major issue for their applications. In this study, the investigated the conductivity of chitosan/ PEO blend films filled with carbonized wood fiber (CWF) prepared by solution casting. The effect of CWF was also investigated on tensile properties and their morphological surfaces. The tensile results from different ratios of chitosan/PEO blend films without CWF show that the tensile strength and modulus increased with the increase of chitosan content and chitosan/PEO blend film with 70/30 ratio exhibited the best combination of tensile strength and flexibility. However, a reduction of tensile strength was observed when CWF amount was increased while the modulus of the tensile shows an increment. The film also exhibited higher electrical conductivity as compared to low chitosan ratio. The addition of CWF greatly enhanced the conductivity three-fold from 10-10 to 10-6 S/cm. The electrical conductivity continued to increase with the increase of CWF up to 30wt%. The surface morphology by Scanning Electron Microscopy (SEM) exhibits the absence of phase separation for the blends indicating good miscibility between the PEO and chitosan. Incorporation of CWF into the blend films at 5wt% showed agglomeration. However, the increase of CWF created larger agglomerations that formed conductive pathways resulting in improved conductivity. FTIR analysis suggested that intermolecular interactions occurred between chitosan and PEO while CWF interacts more with the protons of PEO.

Properties of the polymer as a factor in the quality of textile acetate yarn

1977 ◽  
Vol 8 (5) ◽  
pp. 527-530
Author(s):  
V. N. Grigoryan ◽  
P. A. Chakhoyan ◽  
O. A. Toroyan ◽  
Ts. A. Tonakanyan
Keyword(s):  
Acetate Yarn

Molecular Dynamics Study of Aqueous Solution of Polyethylene Oxide: Critical Test of Force Field Models

2013 ◽  
Vol 11 (4) ◽  
pp. 371-383 ◽  
Author(s):  
Yong-Lei Wang ◽  
Rochelle S. Lawrence ◽  
Zhong-Yuan Lu ◽  
Aatto Laaksonen
Keyword(s):  
Molecular Dynamics ◽  
Aqueous Solution ◽  
Force Field ◽  
Polyethylene Oxide ◽  
Critical Test

Electrical Properties of Electrospun Nanofibers of PEO/Carbon Black Composite

2009 ◽  
Vol 151 ◽  
pp. 67-71 ◽  
Author(s):  
Wai Kit Li ◽  
Y.W. Wong
Keyword(s):  
Electrical Properties ◽  
Carbon Black ◽  
Polyethylene Oxide ◽  
Electrospun Nanofibers ◽  
Angular Speed ◽  
Polymer Fibers ◽  
Fiber Direction ◽  
Fiber Morphology ◽  
Polarized Ftir ◽  
Specific Orientation

Electrospinning is an efficient technique for the fabrication of polymer nanofibers. The charges inside the polymer jet tend to repel each other so as to stretch and reduce the diameter of the polymer fibers. By rotating the collector at a fast angular speed, nanofibers with specific orientation can be obtained. In this study, nanofibers of Polyethylene oxide (PEO) with carbon black were prepared by electrospinning. PEO was dissolved in a mixture of water and ethanol. PEO is known as an electrolytic polymer. With the blending of carbon black powders, its electrical properties along the fiber direction were investigated. The fiber morphology and characteristics were studied by SEM and polarized FTIR.

Hydrophilicity of electrospun microfibers of polyethylene oxide with semisoluble polyaniline for biological applications

2021 ◽  
pp. 50740
Author(s):  
Rosario Ramírez ◽  
Ma. Guadalupe Olayo ◽  
J. Cuauhtemoc Palacios ◽  
Fernando G. Flores ◽  
Maribel González Torres ◽  
...  
Keyword(s):  
Polyethylene Oxide ◽  
Biological Applications
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