Water structure and changes in thermal stability of the system poly(ethylene oxide)–water

1981 ◽  
Vol 77 (9) ◽  
pp. 2053 ◽  
Author(s):  
Roland Kjellander ◽  
Ebba Florin
Keyword(s):  
Thermal Stability ◽  
Ethylene Oxide ◽  
Water Structure ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Thermal Stability Of

scholarly journals Electrospun Silver Nanoparticles-Embedded Feather Keratin/Poly(vinyl alcohol)/Poly(ethylene oxide) Antibacterial Composite Nanofibers

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 305 ◽  
Author(s):  
Ming He ◽  
Man Chen ◽  
Yao Dou ◽  
Jiao Ding ◽  
Hangbo Yue ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Ethylene Oxide ◽  
Vinyl Alcohol ◽  
Composite Nanofibers ◽  
Poly Vinyl Alcohol ◽  
Feather Keratin ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Feathers, which contain >90% keratin, are valuable natural protein resources. The aim of this study is to prepare antimicrobial feather keratin (FK)-based nanofibers by incorporating silver nanoparticles (AgNPs). A series of AgNPs-embedded feather keratin/poly(vinyl alcohol)/poly(ethylene oxide) (FK/PVA/PEO) composite nanofibers with varying amounts of AgNPs content were fabricated by electrospinning. Their morphology, crystallinity, thermal stability, tensile property, and antibacterial activity were systematically investigated. The average diameters of composite nanofibers gradually decreased with increases in the amount of AgNPs. The crystallinity, thermal stability, and antibacterial activity of FK/PVA/PEO nanofibers were enhanced by embedding AgNPs. When embedded with 1.2% AgNPs, both the tensile strength and elongation-at-break reached the highest level. This work has the potential to expand the application of FK-based nanofibers in the biomaterial field.

Thermal Stability of Ultralow k Carbon-Bridged Periodic Mesoporous Organosilica Film

2014 ◽  
Vol 887-888 ◽  
pp. 757-761 ◽  
Author(s):  
Tao Jiang ◽  
Shi Jin Ding ◽  
Zhong Yong Fan ◽  
Wei Zhang
Keyword(s):  
Thermal Stability ◽  
Thermal Treatment ◽  
Ethylene Oxide ◽  
Leakage Current ◽  
Sol Gel ◽  
Periodic Mesoporous Organosilica ◽  
K Value ◽  
Mesoporous Organosilica ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Periodic mesoporous organosilica film was prepared via sol-gel and spin-coating methods using a 1, 2-bis (triethoxysilyl) ethane (BTEE) and a poly (ethylene oxide)-poly (propylene oxide)-poly (ethylene oxide) triblock copolymer template (P123). Thermal treatment at 350°C for 1h resulted in the formation of ultralow dielectric constant (k) film with a k value of 1.82, a leakage current density of 1.58×10-9 A/cm2 at 0.5MV/cm, Youngs modulus of 6.45 GPa, and hardness of 0.58 GPa. Further, thermal treatment at higher temperature up to 500°C still achieves an ultralow k value smaller than 2.0, similar leakage current characteristics, and enhanced mechanical properties. These indicate that synthesized PMO film has robust thermal stability, and very good potential for the application of next-generation inter-level dielectrics.

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