4D printed porous radiopaque shape memory polyurethane for endovascular embolization

Kashyap, Devarshi; Kumar, Prabhat; Kanagaraj, S.

doi:10.1016/j.addma.2018.04.009

Cited by 48 publications

(35 citation statements)

References 20 publications

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“…However, the data points introduced for the presented QR code carriers do also cover a broad area, which in parts overlaps with the already existing data for FFF. Due to the printing result of the thin layer as evident for the substrate of the type 3 QR code carrier, a data point emerges, defining the lowest value for Z. Interestingly, this reasonably good print resolution could neither be achieved by other groups, working on shape memory polyurethanes using extrusion-based AM techniques [26,27,28,29,30,65,66] nor by other researchers who utilized those 3D printing techniques, which were described by Quinlan et al [64]. Admittedly, two-photon lithography (2PL) is another AM technology, which was not included in our considerations, but allows obtaining 3D objects, which are characterized by even smaller layer thicknesses of 0.2 to 0.3 µm [67].…”

Section: Resultsmentioning

confidence: 99%

Additive Manufacturing of Information Carriers Based on Shape Memory Polyester Urethane

et al. 2019

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Shape memory polymers (SMPs) are stimuli-responsive materials, which are able to retain an imposed, temporary shape and recover the initial, permanent shape through an external stimulus like heat. In this work, a novel manufacturing method is introduced for thermoresponsive quick response (QR) code carriers, which originally were developed as anticounterfeiting technology. Motivated by the fact that earlier manufacturing processes were sometimes too time-consuming for production, filaments of a polyester urethane (PEU) with and without dye were extruded and processed into QR code carriers using fused filament fabrication (FFF). Once programmed, the distinct shape memory properties enabled a heating-initiated switching from non-decodable to machine-readable QR codes. The results demonstrate that FFF constitutes a promising additive manufacturing technology to create complex, filigree structures with adjustable horizontal and vertical print resolution and, thus, an excellent basis to realize further technically demanding application concepts for shape memory polymers.

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Section: Resultsmentioning

confidence: 99%

Additive Manufacturing of Information Carriers Based on Shape Memory Polyester Urethane

et al. 2019

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“…They come as a response to new technological needs. Some of them have multifunctional properties that offer the possibility of using them in cutting-edge products in the aerospace industry [ 11 ], the automotive industry, robotics [ 14 ], electronics, and biotechnology [ 20 , 21 ]. Reinforced with fibres, they exhibit a high mechanical strength, significantly higher than typical ABS or PLA materials [ 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Deformation Process of 3D Printed Structures Made from Flexible Material with Different Values of Relative Density

et al. 2020

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The main aim of this article is the analysis of the deformation process of regular cell structures under quasi-static load conditions. The methodology used in the presented investigations included a manufacturability study, strength tests of the base material as well as experimental and numerical compression tests of developed regular cellular structures. A regular honeycomb and four variants with gradually changing topologies of different relative density values have been successfully designed and produced in the TPU-Polyflex flexible thermoplastic polyurethane material using the Fused Filament Fabrication (FFF) 3D printing technique. Based on the results of performed technological studies, the most productive and accurate 3D printing parameters for the thermoplastic polyurethane filament were defined. It has been found that the 3D printed Polyflex material is characterised by a very high flexibility (elongation up to 380%) and a non-linear stress-strain relationship. A detailed analysis of the compression process of the structure specimens revealed that buckling and bending were the main mechanisms responsible for the deformation of developed structures. The Finite Element (FE) method and Ls Dyna software were used to conduct computer simulations reflecting the mechanical response of the structural specimens subjected to a quasi-static compression load. The hyperelastic properties of the TPU material were described with the Simplified Rubber Material (SRM) constitutive model. The proposed FE models, as well as assumed initial boundary conditions, were successfully validated. The results obtained from computer simulations agreed well with the data from the experimental compression tests. A linear relationship was found between the relative density and the maximum strain energy value.

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“…Moreover, it also explores biomedical devices that can be used to treat inaccessible areas of the human body [ 213 ]. Kashyap et al [ 214 ] developed a radio-opaque, porous, and custom-shaped shape memory polyurethane that can be applied in endovascular embolization. Morrison et al developed stents, which were implanted in air passages to support breathing in children [ 215 ].…”

Section: 4d Printingmentioning

confidence: 99%

Additive Manufacturing of Polymer Materials: Progress, Promise and Challenges

et al. 2021

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The use of additive manufacturing (AM) has moved well beyond prototyping and has been established as a highly versatile manufacturing method with demonstrated potential to completely transform traditional manufacturing in the future. In this paper, a comprehensive review and critical analyses of the recent advances and achievements in the field of different AM processes for polymers, their composites and nanocomposites, elastomers and multi materials, shape memory polymers and thermo-responsive materials are presented. Moreover, their applications in different fields such as bio-medical, electronics, textiles, and aerospace industries are also discussed. We conclude the article with an account of further research needs and future perspectives of AM process with polymeric materials.

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4D printed porous radiopaque shape memory polyurethane for endovascular embolization

Cited by 48 publications

References 20 publications

Additive Manufacturing of Information Carriers Based on Shape Memory Polyester Urethane

Additive Manufacturing of Information Carriers Based on Shape Memory Polyester Urethane

Deformation Process of 3D Printed Structures Made from Flexible Material with Different Values of Relative Density

Additive Manufacturing of Polymer Materials: Progress, Promise and Challenges

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