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Advanced Polymer Composites: Synthesis, Characterization and Applications

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A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Polymeric Materials".

Deadline for manuscript submissions: closed (20 November 2022) | Viewed by 10858

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Special Issue Editor

Prof. Dr. Won San Choi

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Guest Editor

Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseodaero, Yuseong-gu, Daejeon 305-719, Korea
Interests: polymer composites; air filtration; oil/water separation; adsorption; (photo)catalysis; desalination
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Special Issue Information

Dear Colleagues,

Polymer composites have been used in advanced applications for many years. Polymer composites are composed of at least two parts, such as the matrix and reinforcement. The polymer composite can contain versatile materials such as metals, ceramics, and polymers as a matrix and as reinforcement. Advanced polymer composites for environmental, biomedical, mechanical, and electronic/electrical applications have received considerable interest.

This Special Issue considers the recent advances in advanced polymer composites: synthesis, characterization and applications. It is our pleasure to invite you to submit original research papers and short communications within the scope of this Special Issue.

Prof. Dr. Won San Choi
Guest Editor

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. Materials 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 2600 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 composites
air filtration
oil/water separation
adsorption
(photo)catalysis
desalination

Published Papers (4 papers)

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Research

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18 pages, 3984 KiB

Open AccessArticle

Preparation and Electrochromic Properties of Benzodithiophene-Isoindigo Conjugated Polymers with Oligoethylene Glycol Side Chains

by Qilin Wang, Yuehui Zhai, Danming Chao, Zheng Chen and Zhenhua Jiang

Materials 2023, 16(1), 60; https://doi.org/10.3390/ma16010060 - 21 Dec 2022

Cited by 2 | Viewed by 1290

Abstract

Functional polymers featuring good processability in non-halogenated, benzene-free green solvents are highly desired due to health and environmental concerns. Herein, a series of novel D-A type conjugated polymers, PBDT-IIDs, are designed and successfully prepared by “green” functionalization of the polymers with highly hydrophilic, highly polar, highly flexible, and biocompatible oligoethylene glycol (OEG) side chains in order to improve the processability. These series polymers are named PBDT-IID2, PBDT-IID3, and PBDT-IID4, respectively, according to the number of oxygen atoms in the side chain. After confirmation by structural characterization, the basic properties of PBDT-IIDs are also investigated. With the increase in the OEG side chain length, the polymer PBDT-IID4 not only has good solubility in the halogen solvent chlorobenzene, but also exhibits excellent solubility in the green halogen-free solvent methyltetrahydrofuran (Me-THF). As a result, the green solvent Me-THF can also be applied to prepare PBDT-IIDs’ electrochromic active layers, except for chlorobenzene and toluene. The electrochromism of PBDT IIDs under both positive and negative voltages has a practical application potential. The several controllable switches between dark green and khaki (0–0.6 V) are expected to show great potential in the field of military camouflage. Furthermore, according to the principle of red, green, and blue (RGB) mixing, light blue-green in the reduced state (−1.6 V) can be used in the preparation of complementary ECDs to provide one of the three primary colors (green). Full article

(This article belongs to the Special Issue Advanced Polymer Composites: Synthesis, Characterization and Applications)

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16 pages, 15124 KiB

Open AccessArticle

Friction Performance Improvement of Phenolic/Rockwool Fibre Composites: Influence of Fibre Morphology and Distribution

by Fatma Makni, Anne-Lise Cristol, Yannick Desplanques and Riadh Elleuch

Materials 2022, 15(15), 5381; https://doi.org/10.3390/ma15155381 - 04 Aug 2022

Cited by 1 | Viewed by 1301

Abstract

The size and morphology of reinforcing fibres have a great influence on organic brake friction composite material properties and performance. This research aims to establish the link between friction material microstructure heterogeneity induced by rockwool fibre morphology and distribution and the resulting tribological behaviour. The adopted approach is based on simplified formulations designed to limit synergistic effects by reducing the number and size distribution of constituents. Two simplified materials are developed with different rockwool fibre size and morphology. The first material is elaborated with calibrated fibre balls, and the second one is performed with separated fibres. Friction and wear behaviour are correlated with thermal phenomena in order to reveal wear mechanisms and thus understand the link between microstructural characteristics and the resulting tribological behaviour. It was found that a regular size and distribution of rockwool fibre balls induce better tribological behaviour and enhance wear resistance. Indeed, a homogeneously distributed porosity, which is induced by fibre balls, favours the development and preservation of the load-bearing plateaus in the contact. This, consequently guarantees a stable friction and a reduced wear rate. Consequently, reducing microstructural heterogeneity, resulting from rockwool fibre morphology and distribution, improves the performance of composite friction material. Full article

(This article belongs to the Special Issue Advanced Polymer Composites: Synthesis, Characterization and Applications)

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17 pages, 6400 KiB

Open AccessArticle

A Highly Effective, UV-Curable, Intumescent, Flame-Retardant Coating Containing Phosphorus, Nitrogen, and Sulfur, Based on Thiol-Ene Click Reaction

by Wenqian Li, Yanli Dou, Xuefei Li, Shengbo Fang, Jian Li and Quanming Li

Materials 2022, 15(9), 3358; https://doi.org/10.3390/ma15093358 - 07 May 2022

Cited by 7 | Viewed by 1701

Abstract

In this paper, a flame-retardant, UV-cured coating was prepared on the fiber composites’ (FC) surface via a thiol-ene click reaction using pentaerythritol tetra(3-mercaptopropionate) (PETMP), triallyl cyanurate (TAC), and 2-hydroxyethyl methacrylate phosphate (PM-2). The synergistic effectiveness of phosphorus (P), nitrogen (N), and sulfur (S) was studied in detail by changing the proportion of these reactants. Sample S₄(N₃P₂)_6, with a molar ratio of N and P elements of 3:2, and the thiol and vinyl groups of 4:6 had the highest LOI value (28.6%) and was self-extinguishing in the horizontal combustion test. It had the lowest peak heat release rate (PHRR) value (279.25 kW/m²) and total smoke production (2.18 m²). Moreover, the thermogravimetric analysis (TG) showed that the decomposition process of the coated composites was delayed. The conversion rate of the double bond and the thiol of S₄(N₃P₂)₆ was 100% and 92.0%, respectively, which showed that the cross-linked network structure was successfully formed. The tensile strength and the flexural strength of coated composites improved, and the transparency of the coating can reach 90%. These characteristics showed that the UV-cured coatings could be used in industrial production to effectively prevent fires. Full article

(This article belongs to the Special Issue Advanced Polymer Composites: Synthesis, Characterization and Applications)

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Review

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29 pages, 4018 KiB

Open AccessReview

Critical Review on Polylactic Acid: Properties, Structure, Processing, Biocomposites, and Nanocomposites

by Lalit Ranakoti, Brijesh Gangil, Sandip Kumar Mishra, Tej Singh, Shubham Sharma, R.A. Ilyas and Samah El-Khatib

Materials 2022, 15(12), 4312; https://doi.org/10.3390/ma15124312 - 17 Jun 2022

Cited by 67 | Viewed by 5963

Abstract

Composite materials are emerging as a vital entity for the sustainable development of both humans and the environment. Polylactic acid (PLA) has been recognized as a potential polymer candidate with attractive characteristics for applications in both the engineering and medical sectors. Hence, the present article throws lights on the essential physical and mechanical properties of PLA that can be beneficial for the development of composites, biocomposites, films, porous gels, and so on. The article discusses various processes that can be utilized in the fabrication of PLA-based composites. In a later section, we have a detailed discourse on the various composites and nanocomposites-based PLA along with the properties’ comparisons, discussing our investigation on the effects of various fibers, fillers, and nanofillers on the mechanical, thermal, and wear properties of PLA. Lastly, the various applications in which PLA is used extensively are discussed in detail. Full article

(This article belongs to the Special Issue Advanced Polymer Composites: Synthesis, Characterization and Applications)

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