Functional Polymer Materials and Devices

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "D:Materials and Processing".

Deadline for manuscript submissions: closed (20 July 2022) | Viewed by 1323

Special Issue Editors


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Guest Editor
State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Interests: polymer physics; polymer nanocomposites; phase transition; ferroelectrics; energy storage and conversion
Department of Materials Science & Engineering, The Penn State University, University Park, PA 16802, USA
Interests: electromechanical coupling in polymers; electrocaloric effect; capacitive energy storage; organic electronics; piezoelectrics; ferroelectrics; polymer flexoelectricity

Special Issue Information

Dear Colleagues,

Functional polymers and devices involve a great variety of polymer materials and engineering which enables a wide range of flexible, wearable, scalable and biocompatible applications. In particular, the advance of novel functional polymeric systems with unique functionalities is highly desired to enable promising device applications in electronics, sensing, energy storage and conversion, which are the central topics in current research. In particular, the rational induction of structural defects to tailor functional properties is essential to the design of functional polymers, which is of both fundamental and practical importance. Moreover, the critical role of the interfacial coupling effect is regarded to be responsible for the exceptional performance of dielectric, electrocaloric, capacitive, piezoelectric and pyroelectric polymer nanocomposites, which demands unprecedented updates to provide fundamental insights into the interfaces. In addition, the nature of the electromechanical coupling effect in polymers and nanocomposites remains elusive, especially at the molecular level. Accordingly, this Special Issue seeks to showcase research papers, communications, and review articles that focus on novel polymers and devices with significantly improved physical properties and developments for practical applications—that is, on the role of defect engineering in polymer chain structure, the interface effect in polymer nanocomposites and electromechanical coupling in polymers and nanocomposites.

We look forward to receiving your submissions!

Prof. Dr. Yang Liu
Dr. Xin Chen
Guest Editors

Manuscript Submission Information

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Keywords

  • functional polymers
  • defects
  • polymer nanocomposites
  • energy harvesting and conversion
  • polymer electronics
  • dielectrics and capacitors
  • sensors
  • MEMS
  • actuators
  • transducers

Published Papers (1 paper)

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Research

13 pages, 3641 KiB  
Article
Design, Fabrication, Structure Optimization and Pressure Sensing Demonstration of COC Piezoelectret Sensor and Sensor Array
by Hui Wang, Xiaolin Wang, Matthew Wadsworth, Mohammad Faisal Ahmed, Zhe Liu and Changchun Zeng
Micromachines 2022, 13(8), 1177; https://0-doi-org.brum.beds.ac.uk/10.3390/mi13081177 - 26 Jul 2022
Viewed by 1050
Abstract
This study reported on the design and fabrication of a pseudo-piezoelectric material (piezoelectret) from cyclic olefin copolymer (COC) based on a micropillar structure. The fabrication feasibility of such structure was explored and piezoelectret with the good piezoelectric activity (characterized by quasi-static piezoelectric coefficient [...] Read more.
This study reported on the design and fabrication of a pseudo-piezoelectric material (piezoelectret) from cyclic olefin copolymer (COC) based on a micropillar structure. The fabrication feasibility of such structure was explored and piezoelectret with the good piezoelectric activity (characterized by quasi-static piezoelectric coefficient d33) was demonstrated. Response surface method with a central composite design was employed to investigate the effects of the structure parameter on the piezoelectric coefficient d33. An optimal structure design was obtained and was validated by experiments. With the optimal design, d33 can reach an exceptional high value of ~9000 pC/N under low pressure. The charging process and the electrical and electromechanical characteristics were further investigated by experimentation and modeling. We further demonstrated the scalability of the fabrication process and demonstrated the application of these sensors in position specific pressure sensing (pressure mapping). Full article
(This article belongs to the Special Issue Functional Polymer Materials and Devices)
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