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Thermal and mechanical characteristics of poly(l-lactic acid) nanocomposite scaffold

Paper ID Volume ID Publish Year Pages File Format Full-Text
13372 852 2003 6 PDF Available
Title
Thermal and mechanical characteristics of poly(l-lactic acid) nanocomposite scaffold
Abstract

Inorganic nanosized silicate nanoplatelets were incorporated into biodegradable poly(l-lactic acid) (PLLA) for the purpose of tailoring mechanical stiffness of PLLA porous scaffold systems. Increasing the nucleation density around the foreign body surfaces, the montmorillonite (MMT) nanoplatelets modified with dimethyl dihydrogenated tallow ammonium cations decreased the glass transition temperature and the degree of PLLA crystallinity, which seemingly caused the accelerated biodegradation rate of PLLA nanocomposites due to the enhanced segmental mobility of backbone chains and the expanded amorphous region of PLLA matrix. The tensile modulus was increased from 121.2 MPa of pristine polymer scaffold to 170.1 MPa of MMT/PLLA nanocomposite scaffold (ca. 40% increment) by the addition of small amount of MMT platelets (5.79 vol%) acting as a mechanical reinforcement of polymer chains in the nanoscale molecular level. Overall, the nanotechnology used in this study may be applied to various scaffold systems of biodegradable polymers and hard/soft scaffold structures requiring critical control and design characteristics of mechanical stiffness and biodegradation rate.

Keywords
Nanocomposite; PLLA; Montmorillonite; Modulus; Biodegradation rate; Scaffold
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Thermal and mechanical characteristics of poly(l-lactic acid) nanocomposite scaffold
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 24, Issue 16, July 2003, Pages 2773–2778
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us