| 簡 介： |
In this work, the biodegradable poly(lactic acid) (PLA)/organicmontmorillonite
(O-MMT) nanocomposites were successfully prepared by the in situ
polymerization intercalation process of D,L-lactide with organically-modified
montmorillonite which was first treated by Cu cations and second treated by nhexadecyl
trimethylammonium bromide (CTAB) cations. O-MMT was characterized
by FT-IR and XRD, the results showed that Cu cations and CTAB cations had been
inserted to the interlayer of MMT, and the interlayer spacing of CTAB-Cu-MMT (OMMT)
increased by 1.829nm. The biodegradable PLA/O-MMT nanocomposites were
characterized by XRD, SEM, FT-IR, TG, and the results showed that silicate layers
were intercalated into the PLA matrix and the biodegradable PLA/O-MMT
nanocomposites were of two different types: intercalated nanocomposites and
exfoliated nanocomposites. This new nanocomposites frequently exhibited
remarkable improvements when compared with the neat PLA matrix. Improvements
could include increased heat distortion temperature, an increase in the
biodegradability rate of biodegradable polymers. |
