scholarly journals Three-dimensional printing of functionally graded liquid crystal elastomer

2020 ◽  
Vol 6 (39) ◽  
pp. eabc0034 ◽  
Author(s):  
Zijun Wang ◽  
Zhijian Wang ◽  
Yue Zheng ◽  
Qiguang He ◽  
Yang Wang ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Glass Plate ◽  
Three Dimensional ◽  
Functionally Graded ◽  
Structure Property ◽  
Three Dimensional Printing ◽  
Liquid Crystal Elastomer ◽  
Simple Strategy ◽  
Potential Applications ◽  
Dimensional Printing

As a promising actuating material, liquid crystal elastomer (LCE) has been intensively explored in building diverse active structures and devices. Recently, direct ink writing technique has been developed to print LCE structures with various geometries and actuation behaviors. Despite the advancement in printing LCE, it remains challenging to print three-dimensional (3D) LCE structures with graded properties. Here, we report a facile method to tailor both the actuation behavior and mechanical properties of printed LCE filaments by varying printing parameters. On the basis of the comprehensive processing-structure-property relationship, we propose a simple strategy to print functionally graded LCEs, which greatly increases the design space for creating active morphing structures. We further demonstrate mitigation of stress concentration near the interface between an actuatable LCE tube and a rigid glass plate through gradient printing. The strategy developed here will facilitate potential applications of LCEs in different fields.

Three-dimensional printing of hierarchical liquid-crystal-polymer structures

Nature ◽  
2018 ◽  
Vol 561 (7722) ◽  
pp. 226-230 ◽  
Author(s):  
Silvan Gantenbein ◽  
Kunal Masania ◽  
Wilhelm Woigk ◽  
Jens P. W. Sesseg ◽  
Theo A. Tervoort ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Three Dimensional ◽  
Liquid Crystal Polymer ◽  
Three Dimensional Printing ◽  
Crystal Polymer ◽  
Dimensional Printing

Multimaterial printing and characterization for mechanical and surface properties of functionally graded prototype

2019 ◽  
Vol 233 (19-20) ◽  
pp. 6741-6753 ◽  
Author(s):  
Sudhir Kumar ◽  
Rupinder Singh ◽  
TP Singh ◽  
Ajay Batish
Keyword(s):  
Polylactic Acid ◽  
Surface Properties ◽  
Fused Deposition Modeling ◽  
Mechanical Performance ◽  
Three Dimensional ◽  
Surface Hardness ◽  
Functionally Graded ◽  
Three Dimensional Printing ◽  
Fused Deposition ◽  
Dimensional Printing

In this work, an effort has been made for multimaterial three-dimensional printing of functionally graded prototypes of polylactic acid matrix (tensile specimens as per ASTM D638 type IV) followed by characterization of mechanical and surface properties. The work is an extension of previous reported studies on twin-screw extrusion process for the preparation of multimaterial wires as feedstock filaments in possible three-dimensional printing applications. The results of the study suggest that the highest peak strength (46.28 MPa) and break strength (41.65 MPa) was obtained for multimaterial three-dimensional printed samples at infill density 100%, infill angle 45°, and infill speed of 90 mm/s on commercial open source fused deposition modeling setup. Further surface hardness measurements performed on two extreme surfaces (top surface comprising magnetite (Fe3O4)-reinforced polylactic acid and bottom with polylactic acid without any reinforcement) revealed that the hardness for the bottom layer was more than the hardness for the top layer. From fractured surface analysis (using photomicrographs), it has been observed that the three-dimensional printed samples with low infill density resulted into more void formation due to which the performance while mechanical testing was poor in comparison to samples printed with higher infill density. The results are also supported by rendered images of photomicrographs, which revealed that high roughness value of samples printed with low infill density was also one of the reasons for poor mechanical performance of multimaterial three-dimensional printed functionally graded prototypes.

Potential applications of three-dimensional printing for anatomical simulations and surgical planning

2020 ◽  
Vol 33 ◽  
pp. 1558-1561
Author(s):  
Atul Babbar ◽  
Ankit Sharma ◽  
Sandeep Bansal ◽  
Jonty Mago ◽  
Varinder Toor
Keyword(s):  
Surgical Planning ◽  
Three Dimensional ◽  
Three Dimensional Printing ◽  
Potential Applications ◽  
Dimensional Printing

Fabrication of functionally graded reaction infiltrated SiC–Si composite by three-dimensional printing (3DP™) process

2001 ◽  
Vol 298 (1-2) ◽  
pp. 110-119 ◽  
Author(s):  
Jooho Moon ◽  
Amador C. Caballero ◽  
Leszek Hozer ◽  
Yet-Ming Chiang ◽  
Michael J. Cima
Keyword(s):  
Three Dimensional ◽  
Functionally Graded ◽  
Three Dimensional Printing ◽  
Dimensional Printing

scholarly journals REVIEW OF CURRENT RESEARCH ON CHITOSAN AS A RAW MATERIAL IN THREE-DIMENSIONAL PRINTING TECHNOLOGY IN BIOMEDICAL APPLICATIONS

2020 ◽  
Vol XXV ◽  
pp. 37-50
Author(s):  
Szymon Mania ◽  
Adrianna Banach ◽  
Robert Tylingo
Keyword(s):  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Raw Material ◽  
Fused Deposition Modelling ◽  
Digital Light Processing ◽  
Three Dimensional Printing ◽  
Fused Deposition ◽  
Potential Applications ◽  
3D Printers ◽  
Dimensional Printing

Three-dimensional (3D) biomaterial manufacturing strategies show an extraordinary driving force for the development of innovative solutions in the biomedical sector, including drug delivery systems, disease modelling and tissue and organ engineering. Due to its remarkable and promising biological and structural properties, chitosan has been widely studied for decades in several potential applications in the biomedical field. However, tools in the form of 3D printers have created new possibilities for the production of chitosan models, implants and scaffolds for cell cultures that are much more precise than existing ones. The article presents current achievements related to the possibility of using chitosan to create new materials for 3D printing in the form of chitosan bioinks, filaments, resins and powders dedicated for bioprinting, fused deposition modelling, stereolithography/digital light processing and selective laser sintering methods, respectively

A novel fast disintegrating tablet fabricated by three‐dimensional printing

2009 ◽  
Vol 00 (00) ◽  
pp. 090730035508060-7
Author(s):  
Deng-Guang Yu ◽  
Chris Branford-White ◽  
Yi-Cheng Yang ◽  
Li-Min Zhu ◽  
Edward William Welbeck ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Three Dimensional Printing ◽  
Fast Disintegrating Tablet ◽  
Dimensional Printing

Central ossifying fibroma of mandible

2020 ◽  
Vol 13 (12) ◽  
pp. e239286
Author(s):  
Kumar Nilesh ◽  
Prashant Punde ◽  
Nitin Shivajirao Patil ◽  
Amol Gautam
Keyword(s):  
Fibrous Tissue ◽  
Three Dimensional ◽  
Facial Asymmetry ◽  
Ossifying Fibroma ◽  
Mandible Reconstruction ◽  
Three Dimensional Printing ◽  
Osseous Lesion ◽  
Large Size ◽  
Dimensional Printing

Ossifying fibroma (OF) is a rare, benign, fibro-osseous lesion of the jawbone characterised by replacement of the normal bone with fibrous tissue. The fibrous tissue shows varying amount of calcified structures resembling bone and/or cementum. The central variant of OF is rare, and shows predilection for mandible among the jawbone. Although it is classified as fibro-osseous lesion, it clinically behaves as a benign tumour and can grow to large size, causing bony swelling and facial asymmetry. This paper reports a case of large central OF of mandible in a 40-year-old male patient. The lesion was treated by segmental resection of mandible. Reconstruction of the surgical defect was done using avascular fibula bone graft. Role of three-dimensional printing of jaw and its benefits in surgical planning and reconstruction are also highlighted.

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