polymer phase
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2022 ◽  
Vol 2022 ◽  
pp. 1-8
Author(s):  
G. Jegan ◽  
P. Ramani ◽  
T. J. Nagalakshmi ◽  
S. Chitra ◽  
T. Samraj Lawrence

A wide interest has been shown in the application of solar energy in recent times. This motivated the researchers to make a development in the approach of solar energy, but there are different technologies like MPPT, CPG, and grid mode that have been used to maintain a constant temperature. Among these, phase change material has been used to regulate the temperature in the system. Solar energy is becoming an essential approach for increasing the efficiency of thermal energy conversion and utilizing polymeric step change composites, which have attracted extremely large interest in recent years due to their advantages of high energy density and powerful energy output stability. A plethora of reviews and reports have been published to compile the diverse range of PCMs made available for various applications. PCMs are created by improving thermophysical thermodynamic stability, latent heat, and heat capacity. Furthermore, the possible applications of polymer phase PCMs in a variety of fields, such as energy storage devices, thermal corrective action, and temperature-controlled drug carriers, are detailed. In this paper, a novel approach on the advancement of nanoconfined phase change material is defined along with the application of the solar energy system.


Sensors ◽  
2021 ◽  
Vol 21 (9) ◽  
pp. 3123
Author(s):  
Ran Yang ◽  
Wenyi Liu ◽  
Wanjia Gao ◽  
Dingwei Kang

The performance of the ultrasonic transducer will directly affect the accuracy of ultrasonic experimental measurement. Therefore, in order to meet the requirements of a wide band, a kind of annular 2-2-2 piezoelectric composite is proposed based on doped PDMS. In this paper, the transducer structure consisted of PZT-5A piezoelectric ceramics and PDMS doped with 3 wt.% Al2O3:SiO2 (1:6) powder, which constituted the piezoelectric composite. MATLAB and COMSOL software were used for simulation. Meanwhile, the electrode materials were selected. Then, the performance of the designed annular 2-2-2 ultrasonic transducer was tested. The simulation results show that when the polymer phase material of the piezoelectric ultrasonic transducer is doped PDMS, the piezoelectric phase and the ceramic substrate account for 70% of the total volume, the polymer phase accounts for 30% of the total volume, and the maximum frequency band width can reach 90 kHz. The experimental results show that the maximum bandwidth of −3 dB can reach 104 kHz when the frequency is 160 kHz. The results of the electrode test show that the use of Cu/Ti electrode improves the electrical conductivity of the single electrode. In this paper, the annular 2-2-2 transducer designed in the case of small volume had the characteristics of a wide frequency band, which was conducive to the miniaturization and integration of the transducer. Therefore, we believe that the annular 2-2-2 piezoelectric composite has broad application prospects.


2021 ◽  
pp. 321-326
Author(s):  
Nikolaos A. Burger ◽  
Antonios Mavromanolakis ◽  
Gerhard Meier ◽  
Patrick Brocorens ◽  
Roberto Lazzaroni ◽  
...  

Author(s):  
Kenta Morita ◽  
Shinano Takeda ◽  
Ayumi Yunoki ◽  
Takane Tsuchii ◽  
Tsutomu Tanaka ◽  
...  

Soft Matter ◽  
2021 ◽  
Author(s):  
Sourav Mondal

Polymer phase separation of a binary system over prepatterned substrate topography during spin casting.


2021 ◽  
Author(s):  
Junjun Tan ◽  
Li Zhang ◽  
Ming-Chien Hsieh ◽  
Jay Goodwin ◽  
Martha Anne Grover ◽  
...  

Progressive solute-rich polymer phase transitions provide pathways for achieving ordered supramolecular assemblies. Intrinsically disordered protein domains specifically regulate information in biological networks via conformational ordering. Here we consider a molecular...


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