Preparation of Shape Memory Polyurethane/Hydroxyapatite Nanocomposite Scaffolds by Electrospinning Method and Investigation of Their Microstructure and Physical-Mechanical Properties

Polyurethane has a wide range of chemical structures available led to the design of materials that easily can meet requirements to shape memory polyurethane (SMPU) due to its ability to retain its shape after deformation through giving a certain disturbance like magnetic field. Based on the previous study, polyurethanes synthesized by reacting 4,4’-methylenebis (cyclohexyl isocyanate) to poly(ethylene glycol) Mw: 6000 as polyurethane chain with 1,1,1-trimethylol propane as chain extender, is a potential candidate for shape memory polyurethane (SMPU). Furthermore this study was performed by adding Fe3O4 nanoparticles as a filler to provide magnetic behavior. In this study, The magnetic and mechanical properties of the SMPU after adding Fe3O4 nanoparticles were evaluated by observing compatibility between the filler and matrix, morphology, ability in retaining shape, and mechanical properties through measuring FTIR, FESEM, Vibrating Magnetometer and UTM, respectively. This study reported a good compatibility between Fe3O4 and the polyurethane, and lack agglomeration of Fe3O4 nanoparticles indicated FTIR and FESEM-EDAX, the fastest ability on retaining its shape obtained from materials with lowest Fe3O4 (3 wt%). Meanwhile the best mechanical and magnetic was resulted from adding 11 wt% of Fe3O4

Download Full-text

Preparation and characterization of electrospun shape memory polyurethane/graphene quantum dot nanocomposite scaffolds for tissue engineering

International Journal of Polymeric Materials ◽

10.1080/00914037.2021.1941954 ◽

2021 ◽

pp. 1-9

Author(s):

Sanaz Sarabiyan Nejad ◽

Donya Razzaghi ◽

Mostafa Rezaei ◽

Massuomeh Bagheri ◽

Amin Babaie ◽

...

Keyword(s):

Tissue Engineering ◽

Quantum Dot ◽

Shape Memory ◽

Graphene Quantum Dot ◽

Nanocomposite Scaffolds ◽

Shape Memory Polyurethane

Download Full-text

Improved mechanical properties of shape-memory polyurethane block copolymers through the control of the soft-segment arrangement

Journal of Applied Polymer Science ◽

10.1002/app.20747 ◽

2004 ◽

Vol 93 (5) ◽

pp. 2410-2415 ◽

Cited By ~ 51

Author(s):

Jae Whan Cho ◽

Yong Chae Jung ◽

Yong-Chan Chung ◽

Byoung Chul Chun

Keyword(s):

Mechanical Properties ◽

Block Copolymers ◽

Shape Memory ◽

Soft Segment ◽

Shape Memory Polyurethane

Download Full-text

Fabrication and Properties of Shape Memory Polyurethane Surface Modified Vapor Grown Carbon Nanofiber Composites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.239-242.855 ◽

2011 ◽

Vol 239-242 ◽

pp. 855-859

Author(s):

Hao Cen ◽

Shan Li ◽

Ming Liang Du ◽

Ya Qin Fu

Keyword(s):

Mechanical Properties ◽

Surface Modification ◽

Shape Memory ◽

Coupling Agent ◽

Carbon Nanofiber ◽

Sol Gel ◽

Testing Machine ◽

Dynamic Mechanical ◽

Sol Gel Process ◽

Shape Memory Polyurethane

Shape memory polyurethane (SMPU)/Vapor grown carbon nanofibers (VGCNF) composites with different surface functionalized method were prepared via sol-gel process. The structure and properties of the composites were investigated by scanning electron microscopy (SEM), universal testing machine, and dynamic mechanical analysis (DMA). The results show that the dispersion of VGCNF with surface modification in matrix is better than that of pristine. The mechanical properties of the composites with VGCNF modified by concentrated nitric acid deteriorated substantially. However, both the tensile strength and elongation at break of the composites combined surface modification of silane coupling agent and sol-gel method increased obviously. The substantially improved mechanical properties are mainly attributed to the cross-link between coupling agent and the network structure of SiO2produced during the sol-gel process. The DMA analysis suggests that the surface treatment of the VGCNF exhibit obviously effect on the dynamic mechanical properties of the composites.

Download Full-text