scholarly journals First-Principles Model to Evaluate Quantitatively the Long-Life Behavior of Cellulose Acetate Polymers

ACS Omega ◽  
2021 ◽  
Vol 6 (12) ◽  
pp. 8028-8037
Author(s):  
Abeer Al Mohtar ◽  
Sofia Nunes ◽  
Joana Silva ◽  
Ana Maria Ramos ◽  
João Lopes ◽  
...  
Keyword(s):  
Cellulose Acetate ◽  
First Principles ◽  
Long Life ◽  
Life Behavior

Boosting the charge transfer of Li2TiSiO5 using nitrogen-doped carbon nanofibers: towards high-rate, long-life lithium-ion batteries

Nanoscale ◽  
2020 ◽  
Vol 12 (38) ◽  
pp. 19702-19710 ◽  
Author(s):  
Junfang Liu ◽  
Die Su ◽  
Li Liu ◽  
Zhixiao Liu ◽  
Su Nie ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Lithium Ion Batteries ◽  
Carbon Nanofibers ◽  
First Principles ◽  
Lithium Ion ◽  
High Rate ◽  
First Principles Calculation ◽  
Nitrogen Doped ◽  
Long Life ◽  
Nitrogen Doped Carbon

The nitrogen-doped carbon encapsulated Li2TiSiO5 (the insulator for transferring electrons by first-principles calculation) nanofibers were fabricated. And unexpectedly, it can boost the charge transfer effectively.

scholarly journals Preparation and Properties of Sustainable Brake Pads with Recycled End-of-Life Tire Rubber Particles

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3371
Author(s):  
Aitana Tamayo ◽  
Fausto Rubio ◽  
Roberto Pérez-Aparicio ◽  
Leticia Saiz-Rodríguez ◽  
Juan Rubio
Keyword(s):  
End Of Life ◽  
Rubber Particle ◽  
Wear Properties ◽  
Friction Mechanism ◽  
Brake Pads ◽  
Cryogenic Grinding ◽  
Rubber Particles ◽  
Grinding Mechanism ◽  
Long Life ◽  
Life Behavior

Sustainable composite brake pads were processed by employing recycled end-of-life tire (ELT) rubber particles obtained by means of cryogenic grinding and ambient grinding. The effect of the grinding mechanism and concentration of ELT rubber particles was then reported. From the friction result test, better behavior in terms of coefficient of friction (COF) was obtained when 3% of ELT rubber particles were introduced into the composite. It was demonstrated that the size of the particles is not as determinant as the friction mechanism in the wear properties of the sustainable brake pads. Whereas, while increasing the ELT rubber particle size acts as detrimental to the COF either in the ambient or cryogenic grinding, at high friction distances, the better adhesion of the particles because of the rough surface of the particles subjected to ambient grinding enhances the long-life behavior of the composite brake pads.

Cellulose Acetate Reverse Osmosis Membrane Structure

1972 ◽  
Vol 30 ◽  
pp. 528-529
Author(s):  
H. K. Plummer ◽  
E. Eichen ◽  
C. D. Melvin
Keyword(s):  
Cellulose Acetate ◽  
Reverse Osmosis ◽  
Membrane Structure ◽  
Freeze Drying ◽  
Dense Layer ◽  
Water Removal ◽  
Reverse Osmosis Membrane ◽  
Correct Interpretation ◽  
Electron Image ◽  
Scanning Electron

Much of the work reported in the literature on cellulose acetate reverse osmosis membranes has raised new and important questions with regard to the dense or “active” layer of these membranes. Several thickness values and structures have been attributed to the dense layer. To ensure the correct interpretation of the cellulose acetate structure thirteen different preparative techniques have been used in this investigation. These thirteen methods included various combinations of water substitution, freeze drying, freeze sectioning, fracturing, embedding, and microtomy techniques with both transmission and scanning electron microscope observations.It was observed that several factors can cause a distortion of the structure during sample preparation. The most obvious problem of water removal can cause swelling, shrinking, and folds. Improper removal of embedding materials, when used, can cause a loss of electron image contrast and, or structure which could hinder interpretation.

Recollections of a Long Life

2009 ◽  
Author(s):  
John Cam Hobhouse
Keyword(s):  
Long Life

Transferability of first principles derived torsional potentials for mesogenic molecules and fragments

1998 ◽  
Vol 93 (6) ◽  
pp. 947-954 ◽  
Author(s):  
C.J. ADAM ◽  
S.J. CLARK ◽  
M.R. WILSON ◽  
G.J. ACKLAND ◽  
J. CRAIN
Keyword(s):  
First Principles ◽  
Torsional Potentials

A first-principles Hartree-Fock description of MnO at high pressures

1998 ◽  
Vol 77 (4) ◽  
pp. 1063-1075
Author(s):  
W. C. Mackrodt, E.-A. Williamson, D. W
Keyword(s):  
First Principles ◽  
High Pressures ◽  
Hartree Fock

Review of From First Principles: An Experiment on Ageing.

1997 ◽  
Vol 42 (2) ◽  
pp. 173-174
Author(s):  
Terri Gullickson
Keyword(s):  
First Principles
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