| Title: | Electrospinning of biphasic biopolymer and polymer : a feasibility and characterization study |
| Author: | |
| Document Type: | Thesis |
| Department: | Department of Biomedical Engineering |
| Degree: | Master of Science |
| Major: | Biomedical Engineering |
| Advisory Committee: |
Jaffe, Michael
Collins, George
Arinzeh, Treena Livingston
|
| Thesis Date: | 2005, January |
| Keywords: |
Electrospinning
Polymeric materials
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| Availability: | Unrestricted |
| Abstract: |
Electrospinning of polymeric materials have been experimented to achieve
nanoscaled diameters. The approaches to the current study are to combine
a natural material such as collagen with synthetic materials and determine
if the interactions between the materials can be used in the electrospinning
process. Collagen is a material of choice due to its biocompatibility.
When collagen is combined with polymer, Polyethylene Oxide (PEG), the
fiber diameters ranged from 1 5Onm to one micron. The fibers produced
have shown drastic phase separation. The next study involved using a duel
solvent system to electrospin fibers. The polymer of choice is Poly (1-lactic
acid) (PLLA) combining with collagen. This approach has given fibers with
diameter ranging from 650nm to over a micron. This method of electrospinning
is the least successful due to the poor solvent miscibility and evaporation.
The third approach to electrospin PLLA with collagen is through the use
of a single solvent Trifluoroacetic acid (TFA). This is a common solvent
for collagen and PLLA and it is very volatile. The diameter of fibers
produced through this process is around 350nm to 500nm. This method showed
the most promise in producing excellent fiber mats. When thermal analyses
are performed the results indicated rapid densification and reorientation
of PLLA. This is determined to be interactions that are occurring between
collagen and PLLA resulting in rapid enthalpic recovery of PLLA.
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| Complete Thesis: |
njit-etd2005-144
(77 pages ~ 17,259 KB pdf)
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Created February 4, 2008
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