3D Bioplotter Research Papers

Displaying all papers by B. Nasri-Nasrabadi (4 results)

Fabrication of a conductive composite structure with enhanced stretchability using direct-write 3D printing

Materials Research Express 2019 Volume 6, Number 8, Article 085319

High stretchability and mechanical stability are the key properties of a conductive polymer composite structure. In this work, an anisotropic composite is fabricated by wet 3D printing of epoxy crosslinked chitosan/carbon microtubes. The carbon microtubes were synthesized through a high temperature carbonization of chemically purified cellulose fibres. After the chemical treatment and high temperature carbonization, the removal amorphous substrates from the core of cotton fibres results in the formation of a tubular structure. Here, chitosan which is an abundant natural polymer was used as the composite matrix. It was found that the epoxy crosslinking increases the stretchability of composite filaments.

Surface nanogrooving of carbon microtubes

Scientific Reports 2018 Volume 8, Article 9924

Extrusion processing of carbon tubes can be problematic due to their poor interfacial interactions with polymeric matrices. Surface chemical modification of carbon tubes can be utilized to create bonding sites to form networks with polymer chains. However, chemical reactions resulting in intermolecular primary bonding limit processability of extrudate, since they cause unstable rheological behaviour, and thus decrease the stock holding time, which is determinative in extrusion. This study presents a method for the synthesis of carbon microtubes with physically modified surface area to improve the filler and matrix interfacial interactions. The key concept is the formation of a nanogrooved topography,…

Development and Analysis of a 3D Printed Hydrogel Soft Actuator

Sensors and Actuators A 2017 Volume 265, Pages 94–101

Polyelectrolyte hydrogels produce mechanical motion in response to electrical stimulus making them a good candidate for implementation of soft actuators. However, their customary fabrication process has thus far hindered their applicability in a broad range of controlled folding behaviours. This paper employs the 3D printing technology does the development of polyelectrolyte hydrogel soft actuators. A 3D printed soft hydrogel actuator with contactless electrodes is presented for the first time. Initially chitosan as a candidate of polyelectrolytes which possess both printability and stimuli responsive is opted for ink preparation of 3D printing. The printing parameters are optimised for fabrication of desired…

3D Printing of a Photo-thermal Self-folding Actuator

The International Conference on Design and Technology 2017 Pages 15-22

The demand for rapid and accurate fabrication of light-weight, biocompatible, and soft actuators in soft robotics has perused researchers to design and fabricate such products by rapid manufacturing techniques. The self-folding origami structure is a type of soft actuator that has applications in micro electro mechanical systems, soft electronics, and biomedical devices. 3-dimentional (3D) printing is a current manufacturing process that can be used for fabrication of involute soft self-folding products by means of shape memory polymer materials. This paper presents, for the first time, a method for developing a photo thermal self-folding soft actuator using a 3D bioplotter. Easily…