scholarly journals Plasma and Polymers: Recent Progress and Trends

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 4091
Author(s):  
Igor Levchenko ◽  
Shuyan Xu ◽  
Oleg Baranov ◽  
Olha Bazaka ◽  
Elena P. Ivanova ◽  
...  
Keyword(s):  
Recent Progress ◽  
State Of The Art ◽  
Reactive Processing ◽  
Dynamic Nature ◽  
Processing Methods ◽  
Thermal Environments ◽  
Wood Polymer ◽  
Polymer Metal ◽  
Efficient Processing ◽  
Metal Polymer

Plasma-enhanced synthesis and modification of polymers is a field that continues to expand and become increasingly more sophisticated. The highly reactive processing environments afforded by the inherently dynamic nature of plasma media are often superior to ambient or thermal environments, offering substantial advantages over other processing methods. The fluxes of energy and matter toward the surface enable rapid and efficient processing, whereas the charged nature of plasma-generated particles provides a means for their control. The range of materials that can be treated by plasmas is incredibly broad, spanning pure polymers, polymer-metal, polymer-wood, polymer-nanocarbon composites, and others. In this review, we briefly outline some of the recent examples of the state-of-the-art in the plasma-based polymer treatment and functionalization techniques.

scholarly journals A Mixed Numerical-Experimental Method to Characterize Metal-Polymer Interfaces for Crash Applications

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 818
Author(s):  
Jonas Richter ◽  
Moritz Kuhtz ◽  
Andreas Hornig ◽  
Mohamed Harhash ◽  
Heinz Palkowski ◽  
...  
Keyword(s):  
Experimental Parameter ◽  
Dissimilar Materials ◽  
Calibration Method ◽  
Parameter Determination ◽  
Failure Behavior ◽  
Cohesive Elements ◽  
Interface Failure ◽  
Wide Range ◽  
Polymer Metal ◽  
Metal Polymer

Metallic (M) and polymer (P) materials as layered hybrid metal-polymer-metal (MPM) sandwiches offer a wide range of applications by combining the advantages of both material classes. The interfaces between the materials have a considerable impact on the resulting mechanical properties of the composite and its structural performance. Besides the fact that the experimental methods to determine the properties of the single constituents are well established, the characterization of interface failure behavior between dissimilar materials is very challenging. In this study, a mixed numerical–experimental approach for the determination of the mode I energy release rate is investigated. Using the example of an interface between a steel (St) and a thermoplastic polyolefin (PP/PE), the process of specimen development, experimental parameter determination, and numerical calibration is presented. A modified design of the Double Cantilever Beam (DCB) is utilized to characterize the interlaminar properties and a tailored experimental setup is presented. For this, an inverse calibration method is used by employing numerical studies using cohesive elements and the explicit solver of LS-DYNA based on the force-displacement and crack propagation results.

scholarly journals Solid-state nanopore systems: from materials to applications

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Yuhui He ◽  
Makusu Tsutsui ◽  
Yue Zhou ◽  
Xiang-Shui Miao
Keyword(s):  
Solid State ◽  
Recent Progress ◽  
State Of The Art ◽  
Ion Selectivity ◽  
Dna Origami ◽  
Fundamental Interest ◽  
Reverse Electrodialysis ◽  
Promising Application ◽  
Flow Through ◽  
Wall Materials

AbstractIon transport and hydrodynamic flow through nanometer-sized channels (nanopores) have been increasingly studied owing to not only the fundamental interest in the abundance of novel phenomena that has been observed but also their promising application in innovative nanodevices, including next-generation sequencers, nanopower generators, and memristive synapses. We first review various kinds of materials and the associated state-of-the-art processes developed for fabricating nanoscale pores, including the emerging structures of DNA origami and 2-dimensional nanopores. Then, the unique transport phenomena are examined wherein the surface properties of wall materials play predominant roles in inducing intriguing characteristics, such as ion selectivity and reverse electrodialysis. Finally, we highlight recent progress in the potential application of nanopores, ranging from their use in biosensors to nanopore-based artificial synapses.

INFLUENCE OF THE DYNAMICS OF FORCED MOTION ON THE STATIC FRICTION IN METAL-POLYMER SLIDING PAIRS

Tribologia ◽  
2021 ◽  
Vol 295 (1) ◽  
pp. 21-26
Author(s):  
Mariusz Opałka ◽  
Wojciech Wieleba ◽  
Angelika Radzińska
Keyword(s):  
Relative Motion ◽  
Friction Pair ◽  
Polymeric Materials ◽  
Static Friction ◽  
Metallic Materials ◽  
Test Results ◽  
Friction Resistance ◽  
Rate Of Increase ◽  
Polymer Metal ◽  
Metal Polymer

The resistance during the frictional interaction of polymeric materials with metallic materials is characterized by a significant dependence on the dynamics of the motion inputs. In a metal-polymer friction pair, the static friction resistance during standstill under load depends on the rate of growth of the force causing the relative motion. Tribological tests of selected (polymer-metal) sliding pairs were carried out. The selected polymers were polyurethane (TPU), polysulfone (PSU), and silicone rubber (SI). They interacted with a pin made of normalized C45 steel under unitary pressure p = 0.5 MPa in dry friction conditions at different gradients of the force driving the relative motion (dF/dt = 0.1-20 [N/s]). The static friction coefficient of the selected sliding pairs was determined on the basis of the recorded static friction force values. The test results show a significant influence of the rate of increase in the motion driving force on the values of static friction resistance. This is mainly due to the viscoelastic properties of polymers.

Effect of the Electrode Material on Electronic Switching in a Metal–Polymer–Metal Structure

2021 ◽  
Vol 15 (3) ◽  
pp. 601-606
Author(s):  
A. F. Galiev ◽  
A. A. Lachinov ◽  
D. D. Karamov ◽  
A. N. Lachinov ◽  
A. R. Yusupov ◽  
...  
Keyword(s):  
Electrode Material ◽  
Metal Structure ◽  
Electronic Switching ◽  
Polymer Metal ◽  
Metal Polymer

scholarly journals High-Tech and Nature-Made Nanocomposites and Their Applications in the Field of Sensors and Biosensors for Gas Detection

Biosensors ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 176
Author(s):  
Daniele Zappi ◽  
Matiss Martins Ramma ◽  
Viviana Scognamiglio ◽  
Amina Antonacci ◽  
Gabriele Varani ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Scientific Community ◽  
Recent Progress ◽  
Gas Detection ◽  
High Tech ◽  
Complex Structures ◽  
Future Perspectives ◽  
Sensing Element ◽  
Metal Polymer ◽  
Nanoscale Level

Gas sensors have been object of increasing attention by the scientific community in recent years. For the development of the sensing element, two major trends seem to have appeared. On one hand, the possibility of creating complex structures at the nanoscale level has given rise to ever more sensitive sensors based on metal oxides and metal–polymer combinations. On the other hand, gas biosensors have started to be developed, thanks to their intrinsic ability to be selective for the target analyte. In this review, we analyze the recent progress in both areas and underline their strength, current problems, and future perspectives.

scholarly journals Mobile Blended Learning with eSquirrel

2015 ◽  
Vol 8 (4Β) ◽  
Author(s):  
Michael Maurer
Keyword(s):  
Blended Learning ◽  
Mobile Learning ◽  
Recent Progress ◽  
State Of The Art ◽  
The State ◽  
Educational Institutions ◽  
Classroom Teaching ◽  
Learning Platform ◽  
Start Up ◽  
Innovative Solution

This article outlines the state of the art of mobile blended learning apps. It describes recent progress in this area, and explains the potential of mobile blended learning for schools and educational institutions. Furthermore, it presents an innovative solution, eSquirrel, which is developed by an Austrian inter-disciplinary start-up. eSquirrel is a blended learning platform that combines mobile learning with gamification. It blends the concepts of classroom teaching, eLearning and learning from books into a native Android and iOS course app, and enables teachers to learn their students’ progress.

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