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Polymers
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Advances in Polymer Based Composite Coatings II
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Advances in Polymer Based Composite Coatings II

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

Deadline for manuscript submissions: closed (15 September 2023) | Viewed by 16373

Special Issue Editor

Dr. Andreea Groza

E-Mail Website1 Website2
Guest Editor
Low Temperature Plasma Laboratory, National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, P.O. Box MG 36, Magurele, 077125 Bucharest, Romania
Interests: plasma deposition methods; spectral characterization of deposition plasma; thin films for biomedical applications; biopolymers
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Polymer-based composite coatings represent a class of attractive materials, as they can have multiple applications in biomedical or industrial fields. The development of such novel materials is a continuous challenge, as specific properties of coatings such as high adherence, crystallinity, temperature and corrosion resistance, or high conductivity are demanded. For these achievements, chemical synthesis methods and physical deposition techniques, together with characterization techniques, need to grow by improving their capabilities.

The present Special Issue targets advances in polymer-based composite coatings generation, and characterization techniques for the most novel applications.

Dr. Andreea Groza
Guest Editor

Keywords

  • polymer-based coatings
  • composite multilayers for biomedical and technological applications
  • plasma deposition/surface treatment techniques
  • chemical synthesis methods

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Published Papers (5 papers)

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Research

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14 pages, 4580 KiB  
Article
Dynamic Wetting Properties of Silica-Poly (Acrylic Acid) Superhydrophilic Coatings
by Sevil Turkoglu, Jinde Zhang, Hanna Dodiuk, Samuel Kenig, Jo Ann Ratto and Joey Mead
Polymers 2023, 15(5), 1242; https://doi.org/10.3390/polym15051242 - 28 Feb 2023
Cited by 6 | Viewed by 2895
Abstract
Superhydrophilic coatings based on a hydrophilic silica nanoparticle suspension and Poly (acrylic acid) (PAA) were prepared by dip coating. Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM) were used to examine the morphology of the coating. The effect of surface morphology on [...] Read more.
Superhydrophilic coatings based on a hydrophilic silica nanoparticle suspension and Poly (acrylic acid) (PAA) were prepared by dip coating. Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM) were used to examine the morphology of the coating. The effect of surface morphology on the dynamic wetting behavior of the superhydrophilic coatings was studied by changing the silica suspension concentration from 0.5% wt. to 3.2% wt. while keeping the silica concentration in the dry coating constant. The droplet base diameter and dynamic contact angle with respect to time were measured using a high-speed camera. A power law was found to describe the relationship between the droplet diameter and time. A significantly low experimental power law index was obtained for all the coatings. Both roughness and volume loss during spreading were suggested to be responsible for the low index values. The water adsorption of the coatings was found to be the reason for the volume loss during spreading. The coatings exhibited good adherence to the substrates and retention of hydrophilic properties under mild abrasion. Full article
(This article belongs to the Special Issue Advances in Polymer Based Composite Coatings II)
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15 pages, 3354 KiB  
Article
Optimizing the Composition of Silicone Enamel to Ensure Maximum Aggregative Stability of Its Suspensions Using Surfactant Obtained from Oil Refining Waste
by Vitaliy Tyukanko, Alexandr Demyanenko, Antonina Dyuryagina, Kirill Ostrovnoy and Gulsim Aubakirova
Polymers 2022, 14(18), 3819; https://doi.org/10.3390/polym14183819 - 13 Sep 2022
Cited by 7 | Viewed by 1677
Abstract
The aim of this study was to optimize the composition of enamel consisting of aluminum pigment and polyphenylsiloxane polymer, in order to achieve the maximum aggregative stability of suspensions. Sedimentation rate (SR) was used as a criterion for assessing the aggregative stability of [...] Read more.
The aim of this study was to optimize the composition of enamel consisting of aluminum pigment and polyphenylsiloxane polymer, in order to achieve the maximum aggregative stability of suspensions. Sedimentation rate (SR) was used as a criterion for assessing the aggregative stability of the suspensions. An original product, AS-1, and industrial additives PEPA and Telaz, were tested as surfactants. AS-1 was obtained from oil refining waste at M. Kozybayev North Kazakhstan University. All the studied surfactants improved the stability of the suspensions. The AS-1 additive significantly improved the stability of the suspensions, but exhibited a lower stabilizing ability by 10–20% than PEPA. The maximum overall stability of the suspensions was recorded at a PEPA level of 0.25–0.375 g/dm3 in the enamel. The Taguchi method was used to optimize the composition of the enamel, using AS-1 as the surfactant. It is recommended to use AS-1 in silicone enamels. Optimum compositions can reduce the petrol absorption of coatings by 1.5 times, their roughness by 2.5 times and increase their gloss. Full article
(This article belongs to the Special Issue Advances in Polymer Based Composite Coatings II)
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14 pages, 41140 KiB  
Article
Effect of Water-Resistant Properties of Kraft Paper (KP) Using Sulfur Hexafluoride (SF6) Plasma Coating
by Pornchai Rachtanapun, Dheerawan Boonyawan, Rafael A. Auras and Gopinath Kasi
Polymers 2022, 14(18), 3796; https://doi.org/10.3390/polym14183796 - 10 Sep 2022
Cited by 6 | Viewed by 2433
Abstract
Sulfur hexafluoride (SF6) plasma at different pressures, powers, and times was used to treat Kraft paper (KP) to enhance its water resistance. The KP was treated with SF6 plasma from 20–300 mTorr of pressure at powers from 25–75 Watts and [...] Read more.
Sulfur hexafluoride (SF6) plasma at different pressures, powers, and times was used to treat Kraft paper (KP) to enhance its water resistance. The KP was treated with SF6 plasma from 20–300 mTorr of pressure at powers from 25–75 Watts and treatment times from 1–30 min at 13.56 MHz. The prepared papers were characterized by contact angle measurement and water absorption. The selected optimum condition for the plasma-treated KP was 200 mTorr at 50 Watts for 5 min. Advancement with the change in treatment times (3, 5, and 7 min) on the physical and mechanical properties, water resistance, and morphology of KP with SF6 plasma at 200 mTorr and 50 Watts was evaluated. The changes in the chemical compositions of the plasma-treated papers were analyzed with an XPS analysis. The treatment times of 0, 3, 5, and 7 min revealed fluorine/carbon (F/C) atomic concentration percentages at 0.00/72.70, 40.48/40.97, 40.18/37.95, and 45.72/39.48, respectively. The XPS spectra showed three newly raised peaks at 289.7~289.8, 291.5~291.7, and 293.4~293.6 eV in the 3, 5, and 7 min plasma-treated KPs belonging to the CF, CF2, and CF3 moieties. The 5 min plasma-treated paper promoted a better interaction between the SF6 plasma and the paper yielded by the F atoms. As the treatment time for the treated KPs increased, the contact angle, water absorption time, and Cobb test values increased. However, the thickness and tensile strength did not show remarkable changes. The SEM images revealed that, as the treatment time increased, the surface roughness of the plasma-treated KPs also increased, leading to improved water resistance properties. Overall, the SF6 plasma treatment modified the surface at the nano-layer range, creating super-hydrophobicity surfaces. Full article
(This article belongs to the Special Issue Advances in Polymer Based Composite Coatings II)
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15 pages, 4485 KiB  
Article
The Effects of Electron Beam Irradiation on the Morphological and Physicochemical Properties of Magnesium-Doped Hydroxyapatite/Chitosan Composite Coatings
by Bogdan Bita, Elena Stancu, Daniela Stroe, Mirabela Dumitrache, Steluta Carmen Ciobanu, Simona Liliana Iconaru, Daniela Predoi and Andreea Groza
Polymers 2022, 14(3), 582; https://doi.org/10.3390/polym14030582 - 31 Jan 2022
Cited by 25 | Viewed by 3742
Abstract
This work reports on the influence of 5 MeV electron beam radiations on the morphological features and chemical structure of magnesium-doped hydroxyapatite/chitosan composite coatings generated by the magnetron sputtering technique. The exposure to ionizing radiation in a linear electron accelerator dedicated to medical [...] Read more.
This work reports on the influence of 5 MeV electron beam radiations on the morphological features and chemical structure of magnesium-doped hydroxyapatite/chitosan composite coatings generated by the magnetron sputtering technique. The exposure to ionizing radiation in a linear electron accelerator dedicated to medical use has been performed in a controllable manner by delivering up to 50 Gy radiation dose in fractions of 2 Gy radiation dose per 40 s. After the irradiation with electron beams, the surface of layers became nano-size structured. The partial detachment of irradiated layers from the substrates has been revealed only after visualizing their cross sections by scanning electron microscopy. The energy dispersive X-ray spectral analysis of layer cross-sections indicated that the distribution of chemical elements in the samples depends on the radiation dose. The X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy and X-ray diffraction analysis have shown that the physicochemical processes induced by the ionizing radiation in the magnesium doped hydroxyapatite/chitosan composite coatings do not alter the apatite structure, and Mg remains bonded with the phosphate groups. Full article
(This article belongs to the Special Issue Advances in Polymer Based Composite Coatings II)
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Review

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21 pages, 7549 KiB  
Review
Overview of Silica-Polymer Nanostructures for Waterborne High-Performance Coatings
by Tiago D. Martins, Tânia Ribeiro and José Paulo S. Farinha
Polymers 2021, 13(7), 1003; https://doi.org/10.3390/polym13071003 - 24 Mar 2021
Cited by 11 | Viewed by 4602
Abstract
Combining organic and inorganic components at a nanoscale is an effective way to obtain high performance coating materials with excellent chemical and physical properties. This review focuses on recent approaches to prepare hybrid nanostructured waterborne coating materials combining the mechanical properties and versatility [...] Read more.
Combining organic and inorganic components at a nanoscale is an effective way to obtain high performance coating materials with excellent chemical and physical properties. This review focuses on recent approaches to prepare hybrid nanostructured waterborne coating materials combining the mechanical properties and versatility of silica as the inorganic filler, with the flexural properties and ease of processing of the polymer matrix. We cover silica-polymer coupling agents used to link the organic and inorganic components, the formation of hybrid films from these silica-polymer nanostructures, and their different applications. These hybrid nanostructures can be used to prepare high performance functional coatings with different properties from optical transparency, to resistance to temperature, hydrophobicity, anti-corrosion, resistance to scratch, and antimicrobial activity. Full article
(This article belongs to the Special Issue Advances in Polymer Based Composite Coatings II)
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