Synthesis and Characterization of Surface-grafted Magnesium oxide whiskers with poly(L-lactide)

摘要

Firstly, Magnesium oxide (MgO) whiskers were prepared by calcination of magnesium carbonate (MgCO_3) whiskers which were obtained by solution method. Then, surface-grafted MgO whiskers with poly(L-lactide) were synthesized by bulk ring-opening polymerization of L-lactide onto the surface of MgO whiskers. The MgO whiskers and surface-grafted MgO whiskers were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD) and fourier transformation infrared (FTIR). Results showed that MgO whiskers' diameter in the range of 0.02-0.5μm, the length is between 10-80μm and well dispersed. A new characteristic stretching vibration absorption peak of C=O appeared in the IR spectrum of the surface-grafted MgO whiskers, which suggested that poly(L-lactide) chains were successfully grafted on the surface of MgO whiskers.