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Recent Advances in Functional Polymer Nanocomposites
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Recent Advances in Functional Polymer Nanocomposites

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

Deadline for manuscript submissions: closed (10 January 2023) | Viewed by 5154

Special Issue Editor

Prof. Dr. Chan-Moon Chung

E-Mail Website
Guest Editor
Department of Chemistry and Medical Chemistry, Yonsei University Mirae Campus, Wonju, Korea
Interests: polyimides; self-healing polymers; nanocomposites
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

A nanocomposite is defined as a multiphase solid material with at least one of the dimensions of one of the constituents on the nanometer scale. Polymer nanocomposites are defined as a mixture of two or more materials, where the matrix is a polymer and the dispersed phase has at least one dimension less than 100 nm. Typical polymer nanocomposites are materials that incorporate nanosized particles in a matrix of polymer material. The inclusion of the nanoparticles induces significant improvements in a variety of properties. Because of high interface areas and strong interfacial interaction between dispersed phase and matrix phase, the nanocomposites possess unique, enhanced properties compared to conventional macro- or micro-composites, including mechanical, electrical, thermal, optical and electrochemical properties. The enhanced properties of the formed polymer nanocomposites depends on the individual properties of each material, their relative amounts, and the overall geometry of the nanocomposites. Integrating nanocomposites can also offer the possibility of combining diverse properties that are impossible within a single material. Therefore, polymer nanocomposites are applicable to various areas of science and technology and find their applications in high-end industries.

This Special Issue is dedicated to recent advances in the research and development of functional polymer nanocomposites. Original research papers and review articles on the latest research work from many world-wide leading groups are invited.

Prof. Dr. Chan-Moon Chung
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 nanocomposite
  •    synthesis, characterization and application
  •    functionality improvement
  •    property improvement

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Published Papers (3 papers)

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Research

9 pages, 4964 KiB  
Article
Selective Blocking of Graphene Defects Using Polyvinyl Alcohol through Hydrophilicity Difference
by Yoon-jeong Kim, Yang Hui Kim and Seokhoon Ahn
Materials 2023, 16(5), 2001; https://doi.org/10.3390/ma16052001 - 28 Feb 2023
Viewed by 1360
Abstract
Defects on graphene over a micrometer in size were selectively blocked using polyvinyl alcohol through the formation of hydrogen bonding with defects. Because this hydrophilic PVA does not prefer to be located on the hydrophobic graphene surface, PVA selectively filled hydrophilic defects on [...] Read more.
Defects on graphene over a micrometer in size were selectively blocked using polyvinyl alcohol through the formation of hydrogen bonding with defects. Because this hydrophilic PVA does not prefer to be located on the hydrophobic graphene surface, PVA selectively filled hydrophilic defects on graphene after the process of deposition through the solution. The mechanism of the selective deposition via hydrophilic–hydrophilic interactions was also supported by scanning tunneling microscopy and atomic force microscopy analysis of selective deposition of hydrophobic alkanes on hydrophobic graphene surface and observation of PVA initial growth at defect edges. Full article
(This article belongs to the Special Issue Recent Advances in Functional Polymer Nanocomposites)
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12 pages, 2718 KiB  
Article
Processing of Low-Density HGM-Filled Epoxy–Syntactic Foam Composites with High Specific Properties for Marine Applications
by Olusegun Adigun Afolabi, Turup Pandurangan Mohan and Krishnan Kanny
Materials 2023, 16(4), 1732; https://doi.org/10.3390/ma16041732 - 20 Feb 2023
Cited by 6 | Viewed by 1797
Abstract
A solution casting approach is used to create hollow glass microsphere (HGM)-filled epoxy–syntactic foam composites (e–SFCs) by varying the concentrations of HGM in epoxy according to different particle sizes. Density analysis is used to investigate the impact of concentration and particle size regularity [...] Read more.
A solution casting approach is used to create hollow glass microsphere (HGM)-filled epoxy–syntactic foam composites (e–SFCs) by varying the concentrations of HGM in epoxy according to different particle sizes. Density analysis is used to investigate the impact of concentration and particle size regularity on the microstructure of e-SFCs. It was observed that e–SFCs filled with an HGM of uniform particle sizes exhibit a reduction in density with increasing HGM concentration, whereas e-SFCs filled with heterogeneous sizes of HGM exhibit closeness in density values regardless of HGM concentration. The variation in e–SFC density can be related to HGM packing efficiency within e–SFCs in terms of concentration and particle size regularity. The particle size with lowest true density of 0.5529 g/cm3, experimental density of 0.949 g/cm3 and tensile strength of 55.74 MPa resulted in e-SFCs with highest specific properties of 100.81 (MPa·g/cm3), with a 35.1% increase from the lowest value of 74.64 (MPa·g/cm3) at a true density of 0.7286 g/cm3, experimental density of 0.928 g/cm3 and tensile strength of 54.38 MPa. The e–SFCs’ theoretical density values were obtained. The variance in theoretical and experimental density values provides a thorough grasp of packing efficiency and inter-particle features. Full article
(This article belongs to the Special Issue Recent Advances in Functional Polymer Nanocomposites)
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Graphical abstract

10 pages, 3031 KiB  
Article
Easy, Fast Self-Heating Polyurethane Nanocomposite with the Introduction of Thermally Annealed Carbon Nanotubes Using Near-Infrared Lased Irradiation
by Hyunsung Jeong, Sooyeon Ryu, Young Nam Kim, Yu-Mi Ha, Chetna Tewari, Seong Yun Kim, Jung Kyu Kim and Yong Chae Jung
Materials 2022, 15(23), 8463; https://doi.org/10.3390/ma15238463 - 28 Nov 2022
Cited by 3 | Viewed by 1544
Abstract
In this study, high-crystallinity single walled carbon nanotubes (H-SWNTs) were prepared by high-temperature thermal annealing at 1800 °C and a self-heating shape memory polyurethane nanocomposite with excellent self-heating characteristics was developed within a few seconds by irradiation with near-infrared rays. With a simple [...] Read more.
In this study, high-crystallinity single walled carbon nanotubes (H-SWNTs) were prepared by high-temperature thermal annealing at 1800 °C and a self-heating shape memory polyurethane nanocomposite with excellent self-heating characteristics was developed within a few seconds by irradiation with near-infrared rays. With a simple method (heat treatment), impurities at the surface of H-SWNTs were removed and at the same time the amorphous structure converted into a crystalline structure, improving crystallinity. Therefore, high conductivity (electric, thermal) and interfacial affinity with PU were increased, resulting in improved mechanical, thermal and electric properties. The electrical conductivity of neat polyurethane was enhanced from ~10–11 S/cm to 4.72 × 10−8 S/cm, 1.07 × 10−6 and 4.66 × 10−6 S/cm, while the thermal conductivity was enhanced up to 60% from 0.21 W/mK, 0.265 W/mK and 0.338 W/mK for the composites of 1, 3 and 5 wt%, respectively. Further, to achieve an effective photothermal effect, H-SWNTs were selected as nanofillers to reduce energy loss while increasing light-absorption efficiency. Thereafter, near-infrared rays of 818 nm were directly irradiated onto the nanocomposite film to induce photothermal properties arising from the local surface plasmon resonance effect on the CNT surface. A self-heating shape memory composite material that rapidly heated to 270 °C within 1 min was developed, even when only 3 wt.% of H-SWNTs were added. The results of this study can be used to guide the development of heat-generating coating materials and de-icing materials for the wing and body structures of automobiles or airplanes, depending on the molding method. Full article
(This article belongs to the Special Issue Recent Advances in Functional Polymer Nanocomposites)
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