Abstract
To improve the degradability of poly (L-lactic acid) (PLLA) and prepare the bone repair material with good mechanical properties, the composites consisting of PLLA and MgO nanoparticles (MgO-NPs) have been prepared. The result suggests that, compared with pure PLLA, modified MgO nanoparticles (g-MgO-NPs) significantly enhance its dispersion in PLLA matrix and its interfacial bonding with PLLA matrix. With addition of 4%(mass ratio) g-MgO-NPs, the tensile strength of film increases from 10.6 MPa to 30.1 MPa, and its elongation at break decreases from 71% to 59%. The pH of film tends to be a relatively stable value and be close to that of the physiological saline after degradation. It reveals that g-MgO-NPs improve the degradability and mechanical properties of polylactic acid composite films in a certain extent.
| Original language | English |
|---|---|
| Pages (from-to) | 1452-1456 |
| Number of pages | 5 |
| Journal | Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica |
| Volume | 31 |
| Issue number | 6 |
| Publication status | Published - 1 Dec 2014 |
| Externally published | Yes |
Keywords
- Composite films
- DL-malic acid
- Mechanical property
- MgO nanoparticles
- Poly (L-lactic acid)