Polymers, Biomolecules and Nanocomposites: Computational Perspectives

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

Deadline for manuscript submissions: 31 January 2025 | Viewed by 3362

Special Issue Editor


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Guest Editor
Theoretical & Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece
Interests: computational modeling (multi-scale simulation techniques, atomistic and mesoscopic modeling); simulation studies on static; conformational and dynamic properties of polymers and colloids; biological systems (short peptides; proteins (mutations); RNA; DNA); complex materials simulation

Special Issue Information

Dear Colleagues,

Macromolecules are a very broad class of materials with potential applications in many different fields. Among them, polymers retain a prominent position due to a huge variety of parameters that can determine their functionality. Architecture, composition, chemistry, molecular weight, etc. are some of their critical features. Combined with suitable nanofillers, one can create reinforced nanocomposites with exceptional properties. Some similar features are also found in biological macromolecules (e.g., proteins), which either alone, or in combination with polymeric molecules, further expand the range of potential applications (biotechnological, medical, etc.).

This Special Issue aims to offers new insights into and reports recent progress in the field of polymers, biopolymers, and related nanocomposites, with a computational perspective on methods, models, properties, and related applications, establishing accurate structure–property relationships. Combined simulation and experimental studies would also be welcome, as they highlight the complementarity of research approaches.

Authors are invited to submit their latest results in the form of original full articles, communications, or reviews.

Dr. Anastassia Rissanou
Guest Editor

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Keywords

  • simulations
  • polymers
  • biomolecules
  • nanofillers
  • multiscale approaches

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Published Papers (3 papers)

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Research

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22 pages, 3839 KiB  
Article
Exploring the Origins of Association of Poly(acrylic acid) Polyelectrolyte with Lysozyme in Aqueous Environment through Molecular Simulations and Experiments
by Maria Arnittali, Sokratis N. Tegopoulos, Apostolos Kyritsis, Vagelis Harmandaris, Aristeidis Papagiannopoulos and Anastassia N. Rissanou
Polymers 2024, 16(18), 2565; https://doi.org/10.3390/polym16182565 - 11 Sep 2024
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Abstract
This study provides a detailed picture of how a protein (lysozyme) complexes with a poly(acrylic acid) polyelectrolyte (PAA) in water at the atomic level using a combination of all-atom molecular dynamics simulations and experiments. The effect of PAA and temperature on the protein’s [...] Read more.
This study provides a detailed picture of how a protein (lysozyme) complexes with a poly(acrylic acid) polyelectrolyte (PAA) in water at the atomic level using a combination of all-atom molecular dynamics simulations and experiments. The effect of PAA and temperature on the protein’s structure is explored. The simulations reveal that a lysozyme’s structure is relatively stable except from local conformational changes induced by the presence of PAA and temperature increase. The effect of a specific thermal treatment on the complexation process is investigated, revealing both structural and energetic changes. Certain types of secondary structures (i.e., α-helix) are found to undergo a partially irreversible shift upon thermal treatment, which aligns qualitatively with experimental observations. This uncovers the origins of thermally induced aggregation of lysozyme with PAA and points to new PAA/lysozyme bonds that are formed and potentially enhance the stability in the complexes. As the temperature changes, distinct amino acids are found to exhibit the closest proximity to PAA, resulting into different PAA/lysozyme interactions; consequently, a different complexation pathway is followed. Energy calculations reveal the dominant role of electrostatic interactions. This detailed information can be useful for designing new biopolymer/protein materials and understanding protein function under immobilization of polyelectrolytes and upon mild denaturation processes. Full article
(This article belongs to the Special Issue Polymers, Biomolecules and Nanocomposites: Computational Perspectives)
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20 pages, 7367 KiB  
Article
Multiscale Modeling of Vinyl-Addition Polynorbornenes: The Effect of Stereochemistry
by Nobahar Shahidi, Jeffrey A. Laub, Konstantinos D. Vogiatzis and Manolis Doxastakis
Polymers 2024, 16(16), 2243; https://doi.org/10.3390/polym16162243 - 7 Aug 2024
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Abstract
Vinyl-addition polynorbornenes are candidates for designing high-performance polymers due to unique characteristics, which include a high glass transition temperature associated with a rigid backbone. Recent studies have established that the processability and properties of these polymers can be fine-tuned by using targeted substitutions. [...] Read more.
Vinyl-addition polynorbornenes are candidates for designing high-performance polymers due to unique characteristics, which include a high glass transition temperature associated with a rigid backbone. Recent studies have established that the processability and properties of these polymers can be fine-tuned by using targeted substitutions. However, synthesis with different catalysts results in materials with distinct properties, potentially due to the presence of various stereoisomers that are difficult to quantify experimentally. Herein, we develop all-atom models of polynorbornene oligomers based on classical force fields and density functional theory. To establish the relationship between chemical architecture, chain conformations, and melt structure, we perform detailed molecular dynamics simulations with the fine-tuned atomistic force field and propose simpler coarse-grained descriptions to address the high molecular weight limit. All-atom simulations of oligomers suggest high glass transition temperatures in the range of 550–600 K. In the melt state (800 K), meso chains form highly rigid extended coils (C11) with amorphous structural characteristics similar to the X-ray diffraction data observed in the literature. In contrast, simulations with racemo chains predict highly helical tubular chain conformations that could promote assembly into crystalline structures. Full article
(This article belongs to the Special Issue Polymers, Biomolecules and Nanocomposites: Computational Perspectives)
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Review

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21 pages, 3376 KiB  
Review
Computational Methodologies in Synthesis, Preparation and Application of Antimicrobial Polymers, Biomolecules, and Nanocomposites
by Iva Rezić and Maja Somogyi Škoc
Polymers 2024, 16(16), 2320; https://doi.org/10.3390/polym16162320 - 16 Aug 2024
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Abstract
The design and optimization of antimicrobial materials (polymers, biomolecules, or nanocomposites) can be significantly advanced by computational methodologies like molecular dynamics (MD), which provide insights into the interactions and stability of the antimicrobial agents within the polymer matrix, and machine learning (ML) or [...] Read more.
The design and optimization of antimicrobial materials (polymers, biomolecules, or nanocomposites) can be significantly advanced by computational methodologies like molecular dynamics (MD), which provide insights into the interactions and stability of the antimicrobial agents within the polymer matrix, and machine learning (ML) or design of experiment (DOE), which predicts and optimizes antimicrobial efficacy and material properties. These innovations not only enhance the efficiency of developing antimicrobial polymers but also enable the creation of materials with tailored properties to meet specific application needs, ensuring safety and longevity in their usage. Therefore, this paper will present the computational methodologies employed in the synthesis and application of antimicrobial polymers, biomolecules, and nanocomposites. By leveraging advanced computational techniques such as MD, ML, or DOE, significant advancements in the design and optimization of antimicrobial materials are achieved. A comprehensive review on recent progress, together with highlights of the most relevant methodologies’ contributions to state-of-the-art materials science will be discussed, as well as future directions in the field will be foreseen. Finally, future possibilities and opportunities will be derived from the current state-of-the-art methodologies, providing perspectives on the potential evolution of polymer science and engineering of novel materials. Full article
(This article belongs to the Special Issue Polymers, Biomolecules and Nanocomposites: Computational Perspectives)
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