Ultrafine fibrous cellulose membranes from electrospinning of cellulose acetate

2002 ◽  
Vol 40 (18) ◽  
pp. 2119-2129 ◽  
Author(s):  
Haiqing Liu ◽  
You-Lo Hsieh
Keyword(s):  
Cellulose Acetate ◽  
Fibrous Cellulose ◽  
Cellulose Membranes

Non-contact, fibrous cellulose acetate/aluminum flexible electronic-sensor for humidity detecting

2020 ◽  
Vol 20 ◽  
pp. 100347 ◽  
Author(s):  
Xiangyu Meng ◽  
Jianhui Yang ◽  
Zhenguo Liu ◽  
Weibing Lu ◽  
Yueming Sun ◽  
...  
Keyword(s):  
Cellulose Acetate ◽  
Electronic Sensor ◽  
Flexible Electronic ◽  
Fibrous Cellulose

scholarly journals Nanofiber-Based Membrane Separators for Lithium-ion Batteries

2015 ◽  
Vol 1718 ◽  
pp. 157-161 ◽  
Author(s):  
Mataz Alcoutlabi ◽  
Hun Lee ◽  
Xiangwu Zhang
Keyword(s):  
Lithium Ion Batteries ◽  
Polyvinylidene Fluoride ◽  
High Performance ◽  
Lithium Ion ◽  
Cellulose Membrane ◽  
Acetate Solution ◽  
Electrolyte Uptake ◽  
Fibrous Cellulose ◽  
Fibrous Membranes ◽  
Cellulose Membranes

ABSTRACTNanofiber-based membranes were prepared by two different methods for use as separators for Lithium-ion batteries (LIBs). In the first method, Electrospinning was used for the fabrication of Polyvinylidene fluoride PVDF nanofiber coatings on polyolefin microporous membrane separators to improve their electrolyte uptake and electrochemical performance. The nanofiber-coated membrane separators show better electrolyte uptake and ionic conductivity than that for the uncoated membranes. In the second method, Forcespinning® (FS) was used to fabricate fibrous cellulose membranes as separators for LIBs. The cellulose fibrous membranes were made by the Forcespinning® of a cellulose acetate solution precursor followed by a subsequent alkaline hydrolysis treatment. The results show that the fibrous cellulose membrane-based separator exhibits high electrolyte uptake and good electrolyte/electrode wettability and therefore can be a good candidate for high performance and high safety LIB separators.

A STUDY OF THE SULPHATE ESTER OF UNSTABILIZED CELLULOSE ACETATE

1954 ◽  
Vol 32 (6) ◽  
pp. 566-580 ◽  
Author(s):  
Karl Keirstead ◽  
John Myers
Keyword(s):  
Thermal Stability ◽  
Ion Exchange ◽  
Cellulose Acetate ◽  
Salt Solution ◽  
Sulphate Content ◽  
Fibrous Cellulose ◽  
Thermal Stability Of

Evidence for the existence of the ester form of the sulphate in unstabilized cellulose acetate has been examined by ion exchange studies on precipitated and fibrous cellulose acetate. The equilibrium reached during ion exchange is affected by the pH and by the concentration of the salt solution used. The thermal stability of the ester is shown to vary inversely with the sulphate content. A study has been made of the accuracy of the various analyses involved.

Cellulose membranes for reverse osmosis Part I. RO cellulose acetate membranes including a composite with polypropylene

Desalination ◽  
2003 ◽  
Vol 159 (2) ◽  
pp. 171-181 ◽  
Author(s):  
Houssni El-Saied ◽  
Altaf H. Basta ◽  
Barsoum N. Barsoum ◽  
Mohamed M. Elberry
Keyword(s):  
Cellulose Acetate ◽  
Reverse Osmosis ◽  
Cellulose Acetate Membranes ◽  
Cellulose Membranes

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.

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