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Polymers
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Properties and Characterization of Polymer Nanocomposites
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Properties and Characterization of Polymer Nanocomposites

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Analysis and Characterization".

Deadline for manuscript submissions: closed (31 July 2024) | Viewed by 3320

Special Issue Editors

Prof. Dr. Chin-San Wu

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Guest Editor
Department of Applied Cosmetology, Kao Yuan University, Kaohsiung County 82101, Taiwan
Interests: green polymer composites; polymer blends; polymeric biomaterials; biodegradable polymers; additive manufacturing (3D printing); electrospinning polymers
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Chi-Hui Tsou

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Guest Editor
College of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong 643000, China
Interests: carbon-based polymer composites; biodegradable materials; biomass materials; recycling of resources; functional polymer nanocomposites; membrane; plasma surface modification; natural additives; biological resource regeneration and application; 3D printing materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Polymer nanocomposites, consisting of polymer matrices reinforced with nanoparticles, have attracted considerable attention due to their unique properties and potential applications across various industries.

This Special Issue encompasses a diverse range of studies exploring the fundamental aspects, synthesis techniques, characterization methods, and applications of polymer nanocomposites. We include research articles that delve into the effects of different nanoparticle types, sizes, and shapes on the mechanical, thermal, electrical, and barrier properties of polymer matrices, as well as articles investigating the electrical and barrier properties of polymer nanocomposites. Dielectric spectroscopy, electrical conductivity measurements, and permeability testing are utilized to assess electrical resistivity, dielectric constant, and the barrier performance of nanocomposites against gases and liquids. These studies shed light on the potential applications of polymer nanocomposites in electronics, sensors, and packaging industries.

In summary, this Special Issue provides a comprehensive compilation of research articles focused on the properties and characterization of polymer nanocomposites. The collection highlights the significance of understanding the structure–property relationships of these materials and showcases the advancements in characterization techniques. The findings presented within this Special Issue will contribute to the development of tailored polymer nanocomposites with enhanced properties and pave the way for their diverse applications in numerous industries.

Prof. Dr. Chin-San Wu
Prof. Dr. Chi-Hui Tsou
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 nanocomposites
  • properties
  • characterization
  • nanoparticles
  • polymer matrices
  • testing techniques
  • nanoparticle characteristics
  • interactions
  • applications

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Published Papers (2 papers)

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Research

24 pages, 13640 KiB  
Article
Enhancing Polyvinyl Alcohol Nanocomposites with Carboxy-Functionalized Graphene: An In-Depth Analysis of Mechanical, Barrier, Electrical, Antibacterial, and Chemical Properties
by Yu-Jie Shui, Wei-Hua Yao, Jarrn-Horng Lin, Yingjun Zhang, Yongqi Yu, Chin-San Wu, Xuemei Zhang and Chi-Hui Tsou
Polymers 2024, 16(8), 1070; https://doi.org/10.3390/polym16081070 - 11 Apr 2024
Cited by 1 | Viewed by 1219
Abstract
To enhance the various properties of polyvinyl alcohol (PVA), varying concentrations of carboxy-functionalized graphene (CFG) were employed in the preparation of CFG/PVA nanocomposite films. FTIR and XRD analyses revealed that CFG, in contrast to graphene, not only possesses carboxylic acid group but also [...] Read more.
To enhance the various properties of polyvinyl alcohol (PVA), varying concentrations of carboxy-functionalized graphene (CFG) were employed in the preparation of CFG/PVA nanocomposite films. FTIR and XRD analyses revealed that CFG, in contrast to graphene, not only possesses carboxylic acid group but also exhibits higher crystallinity. Mechanical testing indicated a notable superiority of CFG addition over graphene, with optimal mechanical properties such as tensile and yield strengths being achieved at a 3% CFG concentration. Relative to pure PVA, the tensile strength and yield strength of the composite increased by 2.07 and 2.01 times, respectively. XRD analysis showed distinct changes in the crystalline structure of PVA with the addition of CFG, highlighting the influence of CFG on the composite structure. FTIR and XPS analyses confirmed the formation of ester bonds between CFG and PVA, enhancing the overall performance of the material. TGA results also demonstrated that the presence of CFG enhanced the thermal stability of CFG/PVA nanocomposite films. However, analyses using scanning electron microscopy and transmission electron microscopy revealed that a 3% concentration of CFG was uniformly dispersed, whereas a 6% concentration of CFG caused aggregation of the nanofiller, leading to a decrease in performance. The incorporation of CFG significantly enhanced the water vapor and oxygen barrier properties of PVA, with the best performance observed at a 3% CFG concentration. Beyond this concentration, barrier properties were diminished owing to CFG aggregation. The study further demonstrated an increase in electrical conductivity and hydrophobicity of the nanocomposites with the addition of CFG. Antibacterial tests against E. coli showed that CFG/PVA nanocomposites exhibited excellent antibacterial properties, especially at higher CFG concentrations. These findings indicate that CFG/PVA nanocomposites, with an optimized CFG concentration, have significant potential for applications requiring enhanced mechanical strength, barrier properties, and antibacterial capabilities. Full article
(This article belongs to the Special Issue Properties and Characterization of Polymer Nanocomposites)
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21 pages, 4334 KiB  
Article
Study on the Isotherms, Kinetics, and Thermodynamics of Adsorption of Crystal Violet Dye Using Ag-NPs-Loaded Cellulose Derived from Peanut-Husk Agro-Waste
by Ghalia Saleem Aljeddani, Reem Mohammad Alghanmi and Ragaa A. Hamouda
Polymers 2023, 15(22), 4394; https://doi.org/10.3390/polym15224394 - 13 Nov 2023
Cited by 3 | Viewed by 1674
Abstract
A huge amount of textile dyes are released as industrial waste into the environment each year, which alters the water’s natural appearance and causes toxicity and carcinogenicity in the human body. Peanut husk is considered an agro-waste and contains many valuable compounds, such [...] Read more.
A huge amount of textile dyes are released as industrial waste into the environment each year, which alters the water’s natural appearance and causes toxicity and carcinogenicity in the human body. Peanut husk is considered an agro-waste and contains many valuable compounds, such as cellulose. Different concentrations of cellulose were extracted from peanut husk and then loaded with bio-silver nanoparticles, which were fabricated using neem leaves (Azadirachta indica) as a reducing agent to form Ag-cellulose nanocomposites (Ag-Cell-NCMs). Different devices were used to characterize Ag-Cell-NCMs. The TEM images displayed that the size of Ag-Cell-NCMs ranged between 13.4 and 17.4 nm after dye adsorption. The Ag-Cell-NCMs were used to adsorb toxic dyes such as crystal violet (CV). Different parameters were applied, such as the ratio of cellulose to Ag-NPs, pH, contact time, adsorbent dose, dye concentration, and the temperature required to reach the optimization conditions to remove CV dye from the aqueous solution. Different kinetics and isotherm models were applied to the experimental data to explain the mechanism of the adsorption process. The adsorption of CV on Ag-Cell-NCMs follows the pseudo-second order, and the best-fit isotherm was the Langmuir isotherm. The new composite was tested for the possibility of dye desorption and ability to be reused several times, and we found that the new nanocomposite can be reused for multiple adsorptions and there is a possibility of dye desorption. Full article
(This article belongs to the Special Issue Properties and Characterization of Polymer Nanocomposites)
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