Investigation of Metamorphosis of Novel Polyurethanes for 3D Inkjet Bioprinting
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Bioprinting is additive manufacturing with tissue engineering applications in mind. It is an emerging and promising technology that widens the horizon of treatment in medical science. It brings the ability for easy reproduction, precision, fast manipulation and usability to biomedical applications such as drug testing models and implantable living tissue or implantable devices. Due to the applications, the material must be biocompatible and biodegradable, in addition to having enough mechanical strength and viscoelasticity to be able to print it. Polyurethanes are one such set of synthetic biopolymers that are processible and degradable. Based on the application and the requirement, they can be tailored to customize degradable timelines and other chemical, physical and mechanical properties. This study uses two such polymers, one is based on a poly-ether polyethylene glycol (PEG) and another on a poly-ester poly(caprolactone) (PCL). Chain Extender DTH and isocyanate HDI form the hard segment for both the polyurethanes. Extrusion based and Inkjet based additive manufacturing techniques have been used and both the materials have shown promise in terms of their ability to transform and print.