Three-dimensional Printing of Cellulose Nanofibers Reinforced PHB/PCL/Fe3O4 Magneto-responsive Shape Memory Polymer Composites with Excellent Mechanical Properties

2021 ◽  
pp. 102146
Author(s):  
Chengbin Yue ◽  
Miao Li ◽  
Yingtao Liu ◽  
Yiqun Fang ◽  
Yongming Song ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Shape Memory ◽  
Polymer Composites ◽  
Shape Memory Polymer ◽  
Cellulose Nanofibers ◽  
Three Dimensional ◽  
Three Dimensional Printing ◽  
Dimensional Printing

Three-Dimensional Printing of Shape Memory Composites with Epoxy-Acrylate Hybrid Photopolymer

2017 ◽  
Vol 9 (2) ◽  
pp. 1820-1829 ◽  
Author(s):  
Ran Yu ◽  
Xin Yang ◽  
Ying Zhang ◽  
Xiaojuan Zhao ◽  
Xiao Wu ◽  
...  
Keyword(s):  
Shape Memory ◽  
Three Dimensional ◽  
Epoxy Acrylate ◽  
Three Dimensional Printing ◽  
Shape Memory Composites ◽  
Dimensional Printing

scholarly journals Effect of Three-dimensional Printing with Nanotubes on Impact Resistance

2019 ◽  
Author(s):  
Anne Schmitz
Keyword(s):  
Mechanical Properties ◽  
Lower Limb ◽  
Impact Resistance ◽  
Three Dimensional ◽  
Three Dimensional Printing ◽  
Impact Tester ◽  
The Impact ◽  
Dimensional Printing ◽  
Pendulum Impact ◽  
Pendulum Impact Tester

Abstract The types of biomedical devices that can be three-dimensional printed (3DP) is limited by the mechanical properties of the resulting materials. As a result, much research has focused on adding carbon nanotubes (CNT) to these photocurable polymers to make them stronger. However, there is little to no data on how CNTs affect the impact resistance of these polymers, an important property when designing and manufacturing lower limb prosthetics. The objective of this study was to expand the use of 3DP to prosthetics by testing the hypothesis that adding CNTs to a stereolithographic (SLA) photocurable resin will result in a cured polymer with increased impact resistance. Twenty-six total specimens: 13 with nanotubes and 13 without nanotubes, were printed on a Form2 SLA printer. Once all the specimens were printed, washed, and cured, the impact resistance was quantified using a pendulum impact tester in a notched Izod configuration. Contrary to the hypothesis, the specimens with SWCNTs (0.312 ± 0.036 ft*lb/in) had a significantly lower impact resistance compared to the non-SWCNT specimens (0.364 ± 0.055 ft*lb/in), U = 34.0, p = 0.004. This decreased impact resistance may be due to voids in the printed polymer around the aggregated nanotubes. Thus, SLA polymers still do not have the impact strength needed to be used for a full lower limb prosthetic.

scholarly journals Remanufacturing of end-of-life glass-fiber reinforced composites via UV-assisted 3D printing

2019 ◽  
Vol 26 (6) ◽  
pp. 981-992
Author(s):  
Andrea Mantelli ◽  
Marinella Levi ◽  
Stefano Turri ◽  
Raffaella Suriano
Keyword(s):  
Mechanical Properties ◽  
Circular Economy ◽  
Three Dimensional ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Content Type ◽  
Three Dimensional Printing ◽  
Glass Fiber Reinforced ◽  
Complex Shapes ◽  
Dimensional Printing

Purpose The purpose of this study is to demonstrate the potential of three-dimensional printing technology for the remanufacturing of end-of-life (EoL) composites. This technology will enable the rapid fabrication of environmentally sustainable structures with complex shapes and good mechanical properties. These three-dimensional printed objects will have several application fields, such as street furniture and urban renewal, thus promoting a circular economy model. Design/methodology/approach For this purpose, a low-cost liquid deposition modeling technology was used to extrude photo-curable and thermally curable composite inks, composed of an acrylate-based resin loaded with different amounts of mechanically recycled glass fiber reinforced composites (GFRCs). Rheological properties of the extruded inks and their printability window and the conversion of cured composites after an ultraviolet light (UV) assisted extrusion were investigated. In addition, tensile properties of composites remanufactured by this UV-assisted technology were studied. Findings A printability window was found for the three-dimensional printable GFRCs inks. The formulation of the composite printable inks was optimized to obtain high quality printed objects with a high content of recycled GFRCs. Tensile tests also showed promising mechanical properties for printed GFRCs obtained with this approach. Originality/value The novelty of this paper consists in the remanufacturing of GFRCs by the three-dimensional printing technology to promote the implementation of a circular economy. This study shows the feasibility of this approach, using mechanically recycled EoL GFRCs, composed of a thermoset polymer matrix, which cannot be melted as in case of thermoplastic-based composites. Objects with complex shapes were three-dimensional printed and presented here as a proof-of-concept.

Optimization of thermo-mechanical properties of shape memory polymer composites based on a network model

2019 ◽  
Vol 207 ◽  
pp. 1017-1029 ◽  
Author(s):  
Zhenqing Wang ◽  
Mengzhou Chang ◽  
Fangyun Kong ◽  
Kumchol Yun
Keyword(s):  
Mechanical Properties ◽  
Shape Memory ◽  
Polymer Composites ◽  
Network Model ◽  
Shape Memory Polymer

Multi-Scale Analysis of Thermo-Mechanical Properties of 2.5D Angle-Interlock Woven Shape Memory Polymer Composites

2018 ◽  
Vol 35 (4) ◽  
pp. 475-486
Author(s):  
H. Y. Sun ◽  
J. P. Gu ◽  
Y. Tang ◽  
Z. M. Xie
Keyword(s):  
Mechanical Properties ◽  
Shape Memory ◽  
Polymer Composites ◽  
Shape Memory Polymer ◽  
Small Strain ◽  
Constitutive Relationship ◽  
Nonlinear Fitting ◽  
Multi Scale ◽  
Hereditary Integral ◽  
Relationship Of

ABSTRACTA multi-scale strategy is employed in the paper to investigate the thermo-mechanical properties of 2.5D angle-interlock woven shape memory polymer composites (SMPCs). In the study, the mesoscopic model of 2.5D woven SMPCs and microscopic model of yarns are firstly developed. After that, the themo-viscoelastic constitutive relationship of the yarn is described in the form of hereditary integral and the parameters of relaxation moduli are obtained from nonlinear fitting of Prony series based on the results of finite element method (FEM). Based on the multi-scale models and the constitutive relationship, the effects of warp and weft arranged densities on viscoelastic properties of 2.5D woven SMPCs are studied in detail. Finally, the shape memory behavior along the warp direction in small strain region is also analyzed. The research in the paper lays a foundation for design and application of woven SMPCs in engineering.

Three-dimensional constitutive model of woven fabric-reinforced shape memory polymer composites considering thermal residual stress

2019 ◽  
Vol 28 (3) ◽  
pp. 035023 ◽  
Author(s):  
Seok Bin Hong ◽  
Joon Hyeok Jang ◽  
Haedong Park ◽  
Jin-Gyun Kim ◽  
Nam Seo Goo ◽  
...  
Keyword(s):  
Residual Stress ◽  
Constitutive Model ◽  
Shape Memory ◽  
Polymer Composites ◽  
Shape Memory Polymer ◽  
Three Dimensional ◽  
Thermal Residual Stress ◽  
Woven Fabric
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