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Efficient inductively heated shape memory polyurethane acrylate network with silane modified nanodiamond@Fe3O4 superparamagnetic nanohybrid

Salkhi Khasraghi, S ; Sharif University of Technology | 2021

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  1. Type of Document: Article
  2. DOI: 10.1016/j.eurpolymj.2021.110735
  3. Publisher: Elsevier Ltd , 2021
  4. Abstract:
  5. Multifunctional magnetic shape memory polymer (SMP) nanocomposites with high sensitivity was synthesized through inclusion of silane functionalized nanodiamond@Fe3O4 (S-NDF) hybrid nanoparticle into polycaprolactone (PCL) based polyurethane acrylate (PUA) matrix followed by in situ crosslinking of the matrix. Highly biocompatible and superparamagnetic nanodiamond(ND)@Fe3O4 nanohybrids were synthesized through in situ co-precipitation method. The morphological analysis suggested that S-NDFs filled PUAs (2 to 9 wt% loadings) well interacted with both soft and hard domains of the matrix. The base polymer and the nanocomposites presented excellent shape fixity ratio (above 97%) and shape recovery ratio (above 99.5%) in hot water. Furthermore, PUA/S-NDF nanocomposites with nanohybrid loading of 9 wt% exhibited excellent shape recovery rate (above 96%) in a very small magnetic field (H = 0.76 kA.m−1) as well as faster magnetic responsiveness compared to Fe3O4 loaded nanocomposites. Moreover, PrestoBlue cell viability assay suggested biocompatibility of the base polymers and the nanocomposites. © 2021 Elsevier Ltd
  6. Keywords:
  7. Biocompatibility ; Crosslinking ; Magnetite ; Nanodiamonds ; Polymer matrix composites ; Polyurethanes ; Precipitation (chemical) ; Shape optimization ; Synthesis (chemical) ; Hybrid nanoparticle ; Magnetic responsiveness ; Matrix ; Nanohybrids ; Polymer nanocomposite ; Polymer-nanocomposite ; Polyurethane/acrylate ; Shape memory polymer nanocomposite ; Shape memory polymers ; Superparamagnetics ; Nanocomposites
  8. Source: European Polymer Journal ; Volume 159 , 2021 ; 00143057 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0014305721004699