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Preparation of poly(lactic acid) composites containing calcium carbonate (vaterite)

Paper ID Volume ID Publish Year Pages File Format Full-Text
13616 885 2003 7 PDF Available
Title
Preparation of poly(lactic acid) composites containing calcium carbonate (vaterite)
Abstract

A new type of ceramic-polymer biomaterial having excellent apatite-forming ability in simulated body fluid was prepared by hot-pressing a mixture of poly(-l-lactic acid) (PLA) and calcium carbonate (vaterite). After PLA dissolved in methylene chloride was mixed with calcium carbonate consisting of vaterite, the mixture was dried completely and subsequently hot-pressed uniaxially under a pressure of 40 MPa at 180°C. When 30 wt% vaterite was introduced, the modulus of elasticity was effectively improved by 3.5–6 GPa, which was about twice higher than the modulus of PLA. The composite showed no brittle fracture behavior and a comparably high bending strength of ∼50 MPa. The composite containing 30 wt% vaterite formed a 5–15-μm-thick bonelike apatite layer on its surface after soaking in SBF at 37°C even for 1–3 d.

Keywords
Poly(lactic acid); Calcium carbonate; Hydroxyapatite; Composite; Simulated body fluid; Young’s modulus
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Preparation of poly(lactic acid) composites containing calcium carbonate (vaterite)
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 24, Issue 19, August 2003, Pages 3247–3253
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