Shape Memory Polymers and Their Composites

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

Deadline for manuscript submissions: closed (20 June 2023) | Viewed by 1976

Special Issue Editors

Centre for Advanced Materials and Technologies CEZAMAT, Warsaw University of Technology, Poleczki 19, 02-822 Warsaw, Poland
Interests: shape-memory polymers; multifunctional composites; biomaterials; polymer synthesis; drug delivery systems

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Guest Editor
Faculty of Materials Science and Engineering, Warsaw University of Technology, Warsaw, Poland
Interests: composites; polymers processing; characterization of polymer-based composites; fibre reinforced plastics, nanocomposites, conductive polymers; epoxy-bsaed composites; thermoplastic processing
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Special Issue Information

Dear Colleagues,

Shape-memory polymers are a class of “smart” materials that can change their shape and size, as triggered by an external stimulus such as light, temperature, or magnetic/electric field. This ability is desirable in many industries, such as aerospace, medicine, automotive, textile, electronic engineering or soft robotics. To accomplish the intended shape-memory effect and other functional properties required for particular applications, the specific microstructure of the polymer matrix should be designed. Composite materials provide more options for modulating the molecular structure and phase morphology as compared to a homogenous material, but some critical issues regarding structure–property relationships should be considered.

This Special Issue focuses on the recent advances in the development, structure design and characterization of shape-memory polymers and their composites for diverse applications. Full papers, communications, and reviews are all welcome.

Dr. Monika Bil
Prof. Dr. Anna Boczkowska
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.

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Keywords

  • shape-memory composites
  • shape-memory polymers
  • composite structure
  • multifunctional materials
  • structure and property characterization
  • shape-memory cycle
  • shape-memory drug delivery systems

Published Papers (1 paper)

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Research

18 pages, 12952 KiB  
Article
Study of Correlation between Structure and Shape-Memory Effect/Drug-Release Profile of Polyurethane/Hydroxyapatite Composites for Antibacterial Implants
by Monika Bil, Magdalena Jurczyk-Kowalska, Kamil Kopeć and Marcin Heljak
Polymers 2023, 15(4), 938; https://doi.org/10.3390/polym15040938 - 14 Feb 2023
Cited by 5 | Viewed by 1705
Abstract
The effectiveness of multifunctional composites that combine a shape-memory polyurethane (PU) matrix with hydroxyapatite (HA) as a bioactive agent and antibiotics molecules results from a specific composite structure. In this study, structure-function correlations of PU-based composites consisting of 3, 5, and 10 (wt%) [...] Read more.
The effectiveness of multifunctional composites that combine a shape-memory polyurethane (PU) matrix with hydroxyapatite (HA) as a bioactive agent and antibiotics molecules results from a specific composite structure. In this study, structure-function correlations of PU-based composites consisting of 3, 5, and 10 (wt%) of HA and (5 wt%) of gentamicin sulfate (GeS) as a model drug were investigated. The performed analysis revealed that increasing HA content up to 5 wt% enhanced hydrogen-bonding interaction within the soft segments of the PU. Differential-scanning-calorimetry (DSC) analysis confirmed the semi-crystalline structure of the composites. Hydroxyapatite enhanced thermal stability was confirmed by thermogravimetric analysis (TGA), and the water contact angle evaluated hydrophilicity. The shape-recovery coefficient (Rr) measured in water, decreased from 94% for the PU to 86% for the PU/GeS sample and to 88–91% for the PU/HA/GeS composites. These values were positively correlated with hydrogen-bond interactions evaluated using the Fourier-transform-infrared (FTIR) spectroscopy. Additionally, it was found that the shape-recovery process initiates drug release. After shape recovery, the drug concentration in water was 17 μg/mL for the PU/GeS sample and 33–47 μg/mL for the PU HA GeS composites. Antibacterial properties of developed composites were confirmed by the agar-diffusion test against Escherichia coli and Staphylococcus epidermidis. Full article
(This article belongs to the Special Issue Shape Memory Polymers and Their Composites)
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