Preparation, Characterization and Biocompatibility of the Serinol-modified Polyurethane(Ester-typed)/Multi-walled Carbon Nanotube Composites
碩士 === 國立臺北科技大學 === 有機高分子研究所 === 100 === Here, we report a method to modify and improve the property of polyurethane (PU). Poly(caprolactone)diol (PCL) and 4,4’- diphenylmethane diisocyanide(MDI) with 1:2 molar ratio have been used for the synthesis of prepolymers. The resulting prepolymers were...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
2012
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| Online Access: | http://ndltd.ncl.edu.tw/handle/h6gtn6 |
| Summary: | 碩士 === 國立臺北科技大學 === 有機高分子研究所 === 100 === Here, we report a method to modify and improve the property of polyurethane (PU). Poly(caprolactone)diol (PCL) and 4,4’- diphenylmethane diisocyanide(MDI) with 1:2 molar ratio have been used for the synthesis of prepolymers. The resulting prepolymers were chain-extended by N-BOC-serinol to obtain the modified PU . Afterwards, BOC group of serinol in PU was de-protected. Finally, multi-walled carbon nanotubes (MWNTs) containing COCl groups were added to form composites
(PU/MWNTs).
The TGA data showed that the Td (temperature of 5%wt degradation) improved with the addition of proper amount of MWNTs. The DSC results indicated that the Tg reached a minimum depending on the MWNTs content, and the composition of the PU/MWNTs. The PU/MWNTs film was found more hydrophilic and decreased in surface electic resistivity with the addition of MWNTs. The breaking tensile strength of PU/MWNTs was also dependent on the MWNTs content and the composite composition. Young’s modulus increased and the elongation at break decreased upon introducing MWNTs into PU. Whole blood clotting test and blood coagulation measurements (APTT and PT) exhibited that the anti-coagulant property of PU improved with the incorporation of the MWNTs.
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