Functional Polymer Composites: Synthesis, Characterization and Application II

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

Deadline for manuscript submissions: 25 August 2024 | Viewed by 1676

Special Issue Editors


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Guest Editor
Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
Interests: smart materials; functionalization; antibacterial properties; surface analyses; electrospinning; biopolymers
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
Interests: polymer crystallization; polymer blends and composites; bio-nanocomposites; sustainable materials science; nanofillers
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

At present, functional polymer composites are increasingly promising materials in materials science and engineering. Polymer composites, including nanocomposites, are made by the incorporation of fillers in polymer matrices, and offer many advantages. The properties of polymer composites are further improved by the surface modification of fillers or the matrix phase. Currently, there is an increasing demand for smart materials based on eco-friendly polymers for a wide variety of applications. Therefore, functional polymer composites are essential to the development of new technologies.

This Special Issue, “Functional Polymeric Composites: Synthesis, Characterization and Application II”, will be focused on the innovative original research and reviews in the field of functional polymer composites. Examples of acceptable research topics include: (a) surface modification, (b) smart biomaterials, (c) hybrid composites, (d) mechanical properties, (e) carbon, (f) textile materials, and (g) other functional polymer composites.

Prof. Dr. Tomasz Makowski
Dr. Sivanjineyulu Veluri
Guest Editors

Manuscript Submission Information

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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

  • nanocomposites
  • hybrid composites
  • mechanical properties
  • surface modification
  • smart-textile materials

Published Papers (2 papers)

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Research

14 pages, 7920 KiB  
Article
The Effect of Mechanical Alteration on Repair Bond Strength of S-PRG-Filler-Based Resin Composite Materials
by Md Sofiqul Islam, Smriti Aryal A C, Shadi El Bahra, Abdullah Jamal Abuhajjeh, Akram Mohammad Al Mofleh, Vivek Padmanabhan and Muhammed Mustahsen Rahman
Polymers 2024, 16(11), 1488; https://doi.org/10.3390/polym16111488 - 24 May 2024
Viewed by 357
Abstract
This study investigates the impact of mechanical alteration on resin composite surfaces and its subsequent effect on repair bond strength. A total of 100 resin composite disks were prepared and were allocated for 24 h or 1 year of artificial aging. Specimens were [...] Read more.
This study investigates the impact of mechanical alteration on resin composite surfaces and its subsequent effect on repair bond strength. A total of 100 resin composite disks were prepared and were allocated for 24 h or 1 year of artificial aging. Specimens were embedded in epoxy resin, and the composite surfaces were mechanically altered using either diamond burs or air abrasion with aluminum oxide or glass beads. A universal bonding material was applied and a 2 mm circular and 3 mm high repair composite cylinder were prepared using a Teflon mold. Then, the specimens were tested for their shear bond strength, and the de-bonded specimens were observed under a scanning electron microscope to determine the failure pattern. SPSS 26.0 statistical software was used to analyze the data. Two-way ANOVA showed a statistically significant effect of mechanical alteration and aging on the shear bond strength of S-PRG-filler-based resin composite (p < 0.05). Surface modification with a fine diamond bur showed a significantly higher bond strength in both 24-h- and 1-year-aged specimens. Surface modification with alumina significantly increased the bond strength of 1-year-aged specimens; however, it was statistically insignificant for 24 h-aged specimens. Mechanical alteration with a fine diamond bur and 50-micron alumina can improve the repair bond strength of the composite. Full article
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11 pages, 3301 KiB  
Article
Ionizing Radiation Synthesis of Hydrogel Nanoparticles of Gelatin and Polyethylene Glycol at High Temperature
by Patricia Y. I. Takinami, Nelida L. del Mastro, Aiysha Ashfaq and Mohamad Al-Sheikhly
Polymers 2023, 15(20), 4128; https://doi.org/10.3390/polym15204128 - 18 Oct 2023
Viewed by 853
Abstract
Nanohydrogel particles of polyethylene glycol (PEG), gelatin (GEL), and PEG–GEL mixtures (MIXs) were synthesized with a high electron beam and 60Co gamma-ray radiation. The relatively novel technique of Asymmetrical Flow Field Flow Fractionation (AF4 or AFFFF) coupled to a Multi-Angle Laser Light [...] Read more.
Nanohydrogel particles of polyethylene glycol (PEG), gelatin (GEL), and PEG–GEL mixtures (MIXs) were synthesized with a high electron beam and 60Co gamma-ray radiation. The relatively novel technique of Asymmetrical Flow Field Flow Fractionation (AF4 or AFFFF) coupled to a Multi-Angle Laser Light Scattering (MALLS) detector was mainly used to determine the hydrodynamic diameter (Dh) of the radiation-synthesized PEG, GEL, and PEG–GEL nanohydrogel particles. Our approach to achieving nanohydrogel particles is to enhance the intracrosslinking reactions and decrease the intercrosslinking reactions of the C-centered radicals of the PEG and GEL. The intracrosslinking reactions of these free radicals were enhanced via irradiation at temperatures of 77–80 °C and using a high dose rate and pulsed irradiation. The shorter average distance between the C-centered free radicals on the backbone of the thermally collapsed PEG and GEL chain, due to the destruction of hydrogen bonds, enhances the intracrosslinking reactions. It was observed that increasing the dose and dose rate decreased the Dh. DLS results lined up with AF4 measurements. This study provides researchers with a clean method to produce GEL–PEG hydrogels without the use of toxic reagents. Particle size can be tuned with dose, dose rate, and temperature as demonstrated in this work. This is ideal for medical applications as the use of ionizing radiation eliminates toxicity concerns and provides simultaneous sterilization of the material. Full article
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