Recent developments of colorimetric mechanical sensors based on polymer composites

2020 ◽  
Vol 8 (35) ◽  
pp. 12036-12053
Author(s):  
Ezgi Inci ◽  
Gokhan Topcu ◽  
Tugrul Guner ◽  
Merve Demirkurt ◽  
Mustafa M. Demir
Keyword(s):  
Polymer Composites ◽  
Mechanical Action ◽  
Mechanical Force ◽  
Naked Eye ◽  
Recent Developments ◽  
Structural Deformations ◽  
Mechanical Sensors ◽  
Force Pressure

Colorimetric mechanical (force, pressure, strain, and impact) sensors allow naked-eye visualization of existing structural deformations of a system occurring upon application of a mechanical action.

Influence of the processing method on the heat resistance of the secondary block copolymer of propylene and ethylene filled with rice hulls

2021 ◽  
Vol 11 ◽  
pp. 32-38
Author(s):  
A. R. Sadritdinov ◽  
◽  
E. M. Zakharova ◽  
A. A. Psyanchin ◽  
A. G. Khusnullin ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Injection Molding ◽  
Heat Resistance ◽  
Polymer Composites ◽  
Softening Temperature ◽  
Mechanical Action ◽  
Decomposition Temperature ◽  
Inert Atmosphere ◽  
Rice Hulls ◽  
Molding Method

Polymer composites based on secondary thermoplastic polymers filled with biodegradable components of plant origin was developed. Repeated thermal and mechanical action on polymers during their processing in the presence of dispersed phase particles leads to a change in the thermophysical and strength characteristics of finished products. The paper studies the regularities of changes in the heat resistance of polymer composites based on a secondary block copolymer of propylene and ethylene, and rice husks, processed by injection molding and pressing. It is shown that filling the secondary polymer with rice hulls leads to an increase in the heat resistance of composites, which is characterized by an increase in the bending temperature under load, Vicat softening temperature, and decomposition temperature during thermogravimetric analysis in an inert atmosphere. Compared to the injection molding method, the processing of polymer composites by pressing makes it possible to obtain more heat-resistant plastic products. Obviously, this is due to the different degrees of crystallinity of the polymer phase. The high cooling rate of the polymer composite melt during the filling of the injection mold reduces the time required for the corresponding change in the conformation of macromolecules and the formation of the crystalline phase. As a consequence, an increase in the content of the amorphous phase of the secondary block copolymer of propylene and ethylene decreases the heat resistance of the prototypes.

Evaluation of ionic-metal polymer composites (IMPC) for use as near-DC mechanical sensors

2001 ◽  
Author(s):  
Kwang Kim ◽  
Moshen Shahinpoor ◽  
Donald Leo ◽  
Benjamin Henderson ◽  
Steven Lane
Keyword(s):  
Polymer Composites ◽  
Mechanical Sensors ◽  
Metal Polymer

A New Smart Damage Sensor Using Mechanoluminescence Material

2011 ◽  
Vol 675-677 ◽  
pp. 1081-1084 ◽  
Author(s):  
Wen Xue Wang ◽  
Yusuke Imai ◽  
C.N. Xu ◽  
T. Matsubara ◽  
Y. Takao
Keyword(s):  
Stress Intensity ◽  
Mechanical Action ◽  
Equivalent Strain ◽  
Smart Sensor ◽  
Intensity Factors ◽  
Film Sensor ◽  
Naked Eye ◽  
Very High ◽  
Functional Ceramics ◽  
Visual Light

This paper proposes a new smart sensor for the detection of damage in structures using mechanoluminescence (ML) material SrAl2O4:Eu (SAOE). SAOE is a kind of functional ceramics that can emit visual light when it is subjected to external mechanical action. The luminescence of SAOE is very high so that it enables us to view the visual light with naked eye. A smart film sensor is fabricated using SAOE powder and polymer. The effect of load frequency on the emitted visual light is investigated under cyclic loading conditions. Furthermore, detection of a crack and evaluation of the stress concentration and stress intensity factors are performed using SAOE film sensor. Experimental results demonstrate that the visual light emitted by SAOE film sensor has good correlation with the equivalent strain and stress.

scholarly journals Recent developments of smart electromagnetic absorbers based polymer-composites at gigahertz frequencies

2016 ◽  
Vol 405 ◽  
pp. 197-208 ◽  
Author(s):  
Fadzidah Mohd. Idris ◽  
Mansor Hashim ◽  
Zulkifly Abbas ◽  
Ismayadi Ismail ◽  
Rodziah Nazlan ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Recent Developments ◽  
Electromagnetic Absorbers

Review of recent developments and induced damage assessment in the modelling of the machining of long fibre reinforced polymer composites

2020 ◽  
Vol 240 ◽  
pp. 112006 ◽  
Author(s):  
F. Cepero-Mejías ◽  
J.L. Curiel-Sosa ◽  
A. Blázquez ◽  
T.T. Yu ◽  
K. Kerrigan ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Damage Assessment ◽  
Reinforced Polymer ◽  
Recent Developments ◽  
Fibre Reinforced Polymer

scholarly journals Molecular, Supramolecular, and Macromolecular Motors and Artificial Muscles

MRS Bulletin ◽  
2009 ◽  
Vol 34 (9) ◽  
pp. 671-681 ◽  
Author(s):  
Dongbo Li ◽  
Walter F. Paxton ◽  
Ray H. Baughman ◽  
Tony Jun Huang ◽  
J. Fraser Stoddart ◽  
...  
Keyword(s):  
Chemical Synthesis ◽  
Molecular Motors ◽  
Molecular Level ◽  
Biological Systems ◽  
Molecular Machines ◽  
Mechanical Action ◽  
Artificial Muscles ◽  
Molecular Scale ◽  
Recent Developments ◽  
External Stimuli

AbstractRecent developments in chemical synthesis, nanoscale assembly, and molecular-scale measurements enable the extension of the concept of macroscopic machines to the molecular and supramolecular levels. Molecular machines are capable of performing mechanical movements in response to external stimuli. They offer the potential to couple electrical or other forms of energy to mechanical action at the nano- and molecular scales. Working hierarchically and in concert, they can form actuators referred to as artificial muscles, in analogy to biological systems. We describe the principles behind driven motion and assembly at the molecular scale and recent advances in the field of molecular-level electromechanical machines, molecular motors, and artificial muscles. We discuss the challenges and successes in making these assemblies work cooperatively to function at larger scales.

Recent developments on characterization of needle-punched nonwoven fabric reinforced polymer composites – A review

2020 ◽  
Vol 26 ◽  
pp. 466-470 ◽  
Author(s):  
Prabina Kumar Patnaik ◽  
Priyadarshi Tapas Ranjan Swain ◽  
Srimant Kumar Mishra ◽  
Abhilash Purohit ◽  
Sandhyarani Biswas
Keyword(s):  
Polymer Composites ◽  
Nonwoven Fabric ◽  
Reinforced Polymer ◽  
Recent Developments
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