Polymer-Based Flexible Materials, 2nd Edition

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Smart and Functional Polymers".

Deadline for manuscript submissions: 25 November 2024 | Viewed by 899

Special Issue Editors


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Guest Editor
1. School of Fashion and Textiles, The Hong Kong Polytechnic University, Hong Kong, 999077, China
2. College of Materials and Energy, South China Agricultural University, Guangzhou, China
Interests: flexible electronics; flexible sensors; funtional polymer composites; biomass materials
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
School of Food Science and Engineering, Hainan University, No. 58 Renmin Avenue, Haikou, China
Interests: flexible sensor; textiles; funtional polymer composites
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Compared to traditional flexible materials, such as metal-based, ceramic-based, and glass-based materials, polymer-based flexible materials have advantages including low density, easy processing, excellent flexibility, and good environmental stability. Over the past few decades, polymer-based flexible materials have received significant attention, due to the rapid development of the electronic industry, medical treatment, health, and other fields. For instance, flexible electronic technology has great potential in reshaping the lifestyle of humans, but the bottleneck of flexible electronic technology is flexible substrates or flexible conductive materials, which can be solved by modifying or doping polymer-based flexible materials. Moreover, it is possible to synthesize new polymer-based flexible materials or modify them for different purposes to endow them with the corresponding functionality.

This Special Issue of Polymers aims to present full research papers, communications, and review articles on the latest advances in the fields of synthesis, characterization, and application of polymer-based flexible materials. Topics that will be covered include, but are not limited to, the synthesis of organic elastomers, conductive polymers, and flexible organic networks; structural characterization; modeling; and applications (i.e., sensor, energy harvesting, energy storage, electromagnetic shielding, and biomedical).

Dr. Jiangtao Xu
Dr. Sihang Zhang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Polymers is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • polymer-based flexible materials
  • flexible electronic devices
  • functional polymer composites
  • flexible EMI materials
  • wearable sensors/actuators

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Published Papers (2 papers)

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Research

15 pages, 3769 KiB  
Article
Flexible Positive Temperature Coefficient Composites (PVAc/EVA/GP-CNF) with Room Temperature Curie Point
by Chao Du, Yangyang Zhang, Jiangmin Lin, Guotao Fan, Can Zhou and Yan Yu
Polymers 2024, 16(14), 2028; https://doi.org/10.3390/polym16142028 - 16 Jul 2024
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Abstract
Polymeric positive temperature coefficient (PTC) materials with low switching temperature points are crucial for numerous electronic devices, which typically function within the room temperature range (0–40 °C). Ideal polymeric PTC materials for flexible electronic thermal control should possess a room-temperature switching temperature, low [...] Read more.
Polymeric positive temperature coefficient (PTC) materials with low switching temperature points are crucial for numerous electronic devices, which typically function within the room temperature range (0–40 °C). Ideal polymeric PTC materials for flexible electronic thermal control should possess a room-temperature switching temperature, low room-temperature resistivity, exceptional mechanical flexibility, and adaptive thermal control properties. In this study, a novel PTC material with a room-temperature switching temperature and superb mechanical properties has been designed. A blend of a semi-crystalline polymer EVA with a low melting temperature (Tm) and an amorphous polymer (PVAc) with a low glass transition temperature (Tg) was prepared. Low-cost graphite was chosen as the conductive filler, while CNF was incorporated as a hybrid filler to enhance the material’s heating stability. PVAc0.4/EVA0.6/GP-3wt.% CNF exhibited the lowest room temperature resistivity, and its PTC strength (1.1) was comparable to that without CNF addition, with a Curie temperature of 29.4 °C. Room temperature Joule heating tests revealed that PVAc0.4/EVA0.6/GP-3wt.% CNF achieved an equilibrium temperature of approximately 42 °C at 25 V, with a heating power of 3.04 W and a power density of 3.04 W/cm2. The Young’s modulus of PVAc0.4/EVA0.6/GP-3wt.% CNF was 9.24 MPa, and the toughness value was 1.68 MJ/m3, indicating that the elasticity and toughness of the composites were enhanced after mixing the fillers, and the mechanical properties of the composites were improved by blending graphite with CNF. Full article
(This article belongs to the Special Issue Polymer-Based Flexible Materials, 2nd Edition)
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18 pages, 6613 KiB  
Article
Optimized Design of Material Preparation for Cotton Linters-Based Carbon Black Dispersion Stabilizers Based on Response Surface Methodology
by Xiongfei An, Xupeng Yang, Canming Hu and Chengli Ding
Polymers 2024, 16(14), 1964; https://doi.org/10.3390/polym16141964 - 9 Jul 2024
Viewed by 410
Abstract
Carbon black particles possess dimensions on the nanometer or sub-nanometer scale. When utilized, these particles have a tendency to aggregate, which compromises their stability under storage conditions. To address this issue, a dispersant was prepared using cotton short fibers as raw materials through [...] Read more.
Carbon black particles possess dimensions on the nanometer or sub-nanometer scale. When utilized, these particles have a tendency to aggregate, which compromises their stability under storage conditions. To address this issue, a dispersant was prepared using cotton short fibers as raw materials through etherification and graft polymerization with acrylamide (AM) and 2-acrylamido-2-methylpropane sulfonic acid (AMPS) as raw materials. The dispersant was then used to disperse carbon black to test its dispersing performance. A response surface optimization test was utilized to ascertain the influence of AMPS monomer mass, AM monomer mass, and potassium persulfate (KPS) initiator mass on the dispersibility of carbon black during dispersant preparation, and a set of optimal preparation conditions were obtained. The dispersion stability of carbon black in water was assessed using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), elemental analysis (EA), thermogravimetric analysis (TG), zeta potential analysis, high magnification scanning electron microscopy (SEM), and contact angle measurements. Results revealed that the optimum mass ratio of carboxymethyl cellulose (CMC) to AMPS to AM was 1:0.69:1.67, with the KPS initiator comprising 1.56% of the total monomer mass. By incorporating the dispersant at a concentration of 37.50%, the particle size of carbon black particles was observed to decrease from 5.350 μm to 0.255 μm, and no agglomeration of carbon black particles occurred even after 3 weeks of storage. Full article
(This article belongs to the Special Issue Polymer-Based Flexible Materials, 2nd Edition)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Flexible positive temperature coefficient composites (PVAc/EVA/GP-CNF) with room temperature Curie Point
Authors: Chao Du; Yangyang Zhang; Jiangmin Lin; Guotao Fan; Can Zhou; Yan Yu
Affiliation: Huazhong University of Science and Technology
Abstract: Polymeric PTC (positive temperature coefficient) materials with low switching temperature points are important for many electronic devices, which typically operate in the room temperature range (0-40°C). Ideal polymer PTC materials for flexible electronic thermal control should also include room temperature switching temperature, low room-temperature resistivity, good mechanical flexibility and adaptive thermal control properties. In this work, a new PTC material with room -temperature switching temperature and excellent mechanical properties is designed. A semi-crystalline polymer EVA with low melting temperature (Tm) and an amorphous polymer (PVAc) with low glass transition temperature (Tg) were blended and prepared. Low-cost graphite was selected as the conductive filler, while CNF was added as the hybrid filler to enhance the heating stability of the material. The PTC material has low switching temperature point (

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