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This project is documented on Confluence here: https://wiki.rit.edu/display/P20677/Project+Overview 3D printing is a rapidly growing field that is becoming increasingly popular for constructing living tissues. Bioprinters have been used to print complex combinations of biocompatible hydrogels and cell populations with great accuracy. A layer of viscous biocompatible material is applied with one print head and cross-linked with a UV light source. Cells suspended in a bio-ink are then deposited on top of this gel with a separate print head. This technique requires a unique print head for each different hydrogel or cell population, reducing both the print speed and maximum print size, while drastically increasing complexity. 3D printed hydrogels must also be UV crosslinked with a separate light source, which further increases print time and can have a negative effect on cells. Both of these issues can be solved with the addition of microfluidic fluid routing devices. A single device the size of a glass slide could handle all the fluid routing for multiple hydrogels and allow the printer to easily switch between them. By changing the pressure of individual fluid reservoirs, the printer could quickly switch between different materials without requiring extra heads or switching steps. This technique also simplifies the coding of the printer, increases maximum printable area, and reduces the time spent switching materials. The incorporation of a microfluidic print head also allows the printer to crosslink the hydrogel material within the printhead. In this way, hydrogel material could enter the microfluidic chip as liquid, be crosslinked by a directed UV beam, and exit the printhead as a solid gel. This would allow the printer to create strands of aligned collagen with high precision, which is very useful for cell and tissue culture because it is analogous to how collagen is structured in the body. The addition of a microfluidic chip would also allow the 3D bioprinter to create more complex structures by harnessing techniques like hydrodynamic focusing. Flow focusing would allow cells to be printed within channels of hydrogel, allowing the printer to create more complex structures. The current prototype has a functioning microfluidic printhead with x,y, and z control. The next steps for this project will be generation of a 3D structure and incorporation of live cells into the hydrogel. Further stages of the project could include incorporation of multiple hydrogels to allow for sacrificial components, prototyping nanocomposite gels to improve mechanical properties, and addition of UV crosslinking functionality to the printer. For more detailed background information, create a new node and add a link here. 
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Team Members
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| Member | Role | Contact |
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| Grant Korensky | Mechanical Engineering | gfk8360@rit.edu |
| Nicholas Lee | Biomedical Engineering | nkl8768@rit.edu |
| Anthony Aggouras | Biomedical Engineering | ana6847@rit.edu |
| Shriji Patel | Biomedical Engineering | sxp4523@rit.edu |
| Charif Elmoussaoui | Electrical Engineering | cxe3715@rit.edu |
| Cody Lentz | Mechanical Engineering | cjl5831@rit.edu |
Information
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Work Breakdown: By Phase
| MSD I & II | MSD I | MSD II |
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Integrated System Build & Test Customer Handoff & Final Project Documentation (Verification & Validation) |
Work Breakdown: By Topic
Use this space to link to live/final documents throughout the project. Your team should customize this as-needed, with input from your guide and customer. The example below will address most of what most teams need to capture.
| Project Management | Design Tools | Design Documentation | Implementation | Validation | Presentation & Dissemination |
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PRP Requirements Schedule Cost Risk Management Problem Management Communication & Minutes |
Use Cases Benchmarking Functional Decomposition Morphological Chart Pugh Concept Selection |
BOM Mechanical Drawings Electrical Schematics Software Diagrams Facility Layout Manuals |
Mockups Test Fixtures Prototyping Test Plans |
Analysis Results Simulations Test Results |
Design Review Documents Technical Paper Poster Imagine RIT Exhibit |
Acknowledgements
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- Node updated 2019-09-10 17:25 by cjl5831