Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/82140
Title: Isocyanate modified GO shape-memory polyurethane composite
Authors: Zhang, Y 
Hu, J 
Issue Date: 2020
Source: Polymers, 2020, v. 12, no. 1, 118
Abstract: Shape-memory composites have benefits for minimally invasive surgery, but their wider applications for bone repair are hindered by conflicts between the mechanical and memory performances, especially at load-bearing locations. In this study, we fabricated a graphene oxide shape-memory polyurethane composite through the chemical combination of graphene oxide and isocyanate, in order to realize satisfactory mechanical and shape-memory effects. As desired, a modulus of ~339 MPa and a shape recovery ratio of 98% were achieved, respectively, in the composite. In addition, finite element analysis demonstrated that, after being implanted in a defective bone through a minimally invasive treatment, where the highest stress was distributed at the implant-bone interface, this composite could offer a generated force during the recovery process. Furthermore, we also discuss the origins of the improved mechanical and memory properties of the composites, which arise from increased net-points and the stable molecular structure inside. Therefore, with its superior structure and properties, we envision that this shape-memory composite can provide new insights toward the practical application of shape-memory polymers and composites in the field of bone repair.
Keywords: Bone repair
Graphene oxide
Mechanical and memory properties
Shape-memory composite
Publisher: Molecular Diversity Preservation International (MDPI)
Journal: Polymers 
ISSN: 2073-4360
DOI: 10.3390/polym12010118
Rights: © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
The following publication Zhang Y, Hu J. Isocyanate Modified GO Shape-Memory Polyurethane Composite. Polymers. 2020; 12(1):118, is available at https://doi.org/10.3390/polym12010118
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