Chitin for the Replacement of Fluoropolymers in the Assembly of Electrochemical Devices

2018 ◽  
Author(s):  
Catherine King ◽  
Max E. Easton ◽  
Robin D. Rogers
Keyword(s):  
Tensile Strength ◽  
Aqueous Electrolyte ◽  
Composite Films ◽  
Polymer Materials ◽  
Storage Device ◽  
Energy Storage Device ◽  
Environmentally Sustainable ◽  
Electrochemical Devices ◽  
Mechanical Tensile ◽  
And Function

Chitin and graphene/chitin composite films were prepared using ionic liquid processing and tested as separators and electrodes, respectively, in a supercapacitor to demonstrate the construction and function of an energy storage device which is constructed solely from bio-based polymer materials. The dry films possessed high thermal (Td = 265 and 246 °C) and mechanical (tensile strength = 5(1) and 1.7(2) MPa) stabilities. Once soaked in an aqueous electrolyte (2 M (NH4)2SO4) for use in a supercapacitor test cell, the device reached a peak capacitance value of 2.4 F/g. This work demonstrates a first step towards a scalable method for the preparation and assembly of biorenewable electrochemical devices, which avoid the use of unsustainable fluoropolymers and solvents, and is poised to be an important part of environmentally-sustainable economies.

Chitin for the Replacement of Fluoropolymers in the Assembly of Electrochemical Devices

2018 ◽  
Author(s):  
Catherine King ◽  
Max E. Easton ◽  
Robin D. Rogers
Keyword(s):  
Tensile Strength ◽  
Aqueous Electrolyte ◽  
Composite Films ◽  
Polymer Materials ◽  
Storage Device ◽  
Energy Storage Device ◽  
Environmentally Sustainable ◽  
Electrochemical Devices ◽  
Mechanical Tensile ◽  
And Function

Chitin and graphene/chitin composite films were prepared using ionic liquid processing and tested as separators and electrodes, respectively, in a supercapacitor to demonstrate the construction and function of an energy storage device which is constructed solely from bio-based polymer materials. The dry films possessed high thermal (Td = 265 and 246 °C) and mechanical (tensile strength = 5(1) and 1.7(2) MPa) stabilities. Once soaked in an aqueous electrolyte (2 M (NH4)2SO4) for use in a supercapacitor test cell, the device reached a peak capacitance value of 2.4 F/g. This work demonstrates a first step towards a scalable method for the preparation and assembly of biorenewable electrochemical devices, which avoid the use of unsustainable fluoropolymers and solvents, and is poised to be an important part of environmentally-sustainable economies.

An aqueous electrolyte, sodium ion functional, large format energy storage device for stationary applications

2012 ◽  
Vol 213 ◽  
pp. 255-264 ◽  
Author(s):  
J.F. Whitacre ◽  
T. Wiley ◽  
S. Shanbhag ◽  
Y. Wenzhuo ◽  
A. Mohamed ◽  
...  
Keyword(s):  
Energy Storage ◽  
Aqueous Electrolyte ◽  
Sodium Ion ◽  
Storage Device ◽  
Energy Storage Device ◽  
Large Format

Creation of Basalt Plastics with Different Types of Hybrid Matrices

2021 ◽  
Vol 1037 ◽  
pp. 189-195
Author(s):  
Ekaterina Kosenko ◽  
Natalya Baurova ◽  
Vladimir Zorin
Keyword(s):  
Tensile Strength ◽  
Tensile Tests ◽  
Polymer Materials ◽  
Molding Process ◽  
Organosilicon Polymer ◽  
Deformation Properties ◽  
Different Types ◽  
Plastic Matrix ◽  
Mechanical Tensile ◽  
Technology Of Production

Basalt plastic, thanks to its complex of valuable operational properties, has a potential variety of applications. the article describes the technology of production of basalt plastics with various types of hybrid matrices, one of the components of which is cured in the molding process, and the second-like a binder in natural materials, retains its viscoelastic state. The viscoelastic component makes it possible to increase the deformation properties in the zones of their location, preventing cracking under increased loads. As a result of the conducted mechanical tensile tests, the average values of absolute breaking forces, tensile strength and elongation during fracture of basalt plastic samples with different types of hybrid matrices were obtained. The addition of viscoelastic components (such as technical wax, anaerobic, and organosilicon polymer materials) to the basalt plastic matrix allows to increase the elongation at fracture by 2...5%. Anaerobic polymer material in the basalt plastic matrix allows to increase the tensile strength of the composite material, as well as significantly reduce the dispersion of the measured values. This provides an effective prediction of the operational properties of the structural material in the design of products. On the basis of microanalysis of the structure of basalt plastics with different types of hybrid matrices, an explanation of the causes of changes in the mechanical properties of the resulting composite materials is given.

Preparation and Characterization of β-glucosidase Films for Stabilization and Handling in Dry Configurations

2020 ◽  
Vol 21 (8) ◽  
pp. 741-747
Author(s):  
Liguang Zhang ◽  
Yanan Shen ◽  
Wenjing Lu ◽  
Lengqiu Guo ◽  
Min Xiang ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Protein Function ◽  
Protein Stabilization ◽  
Functional Protein ◽  
Elongation At Break ◽  
Gelatin Films ◽  
The Stability ◽  
And Function ◽  
General Method

Background: Although the stability of proteins is of significance to maintain protein function for therapeutical applications, this remains a challenge. Herein, a general method of preserving protein stability and function was developed using gelatin films. Method: Enzymes immobilized onto films composed of gelatin and Ethylene Glycol (EG) were developed to study their ability to stabilize proteins. As a model functional protein, β-glucosidase was selected. The tensile properties, microstructure, and crystallization behavior of the gelatin films were assessed. Result: Our results indicated that film configurations can preserve the activity of β-glucosidase under rigorous conditions (75% relative humidity and 37°C for 47 days). In both control films and films containing 1.8 % β-glucosidase, tensile strength increased with increased EG content, whilst the elongation at break increased initially, then decreased over time. The presence of β-glucosidase had a negligible influence on tensile strength and elongation at break. Scanning electron-microscopy (SEM) revealed that with increasing EG content or decreasing enzyme concentrations, a denser microstructure was observed. Conclusion: In conclusion, the dry film is a promising candidate to maintain protein stabilization and handling. The configuration is convenient and cheap, and thus applicable to protein storage and transportation processes in the future.

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