| 论文简介 |
Carbon nanotubes (CNTs) and reduced graphene oxide (RGO) were successfully assembled by chemical reaction to obtain CNT-d-RGO particles. Then, a home-made dynamic impregnating device was used to prepare hybrid CNT-d-RGO/polyethylene glycol (PEG). Next, the different modifiers, including CNTs, GO, CNT-d-RGO, PEG, and CNT-d-RGO/PEG, were, respectively, added into poly-(lactic acid) (PLA) matrix via melt-compounding. The dispersed morphology for these different modifiers within the PLA matrix was confirmed by SEM and TEM observations. Especially, compared with the identical weight ratio of CNT-d-RGO, the hybrid CNT-d-RGO/PEG within the PLA matrix exhibited an excellent exfoliated and interconnected networks morphology. Moreover, compared with pure PLA, not only the crystallinity of all PLA-based composites notably improved, but half-crystallization time was also shortened. Furthermore, despite the addition of different modifiers, the crystal form of PLA-based composites remained unchanged. Noticeably, compared with those of pure PLA, the tensile stress, strain, and modulus of PLA composite added with CNT-d-RGO/PEG increased by 29.4%, 4.1%, and 56.1%, respectively, and the V-notch impact strength slightly improved. In addition, compared with pure PLA, volume resistivity of the PLA composite added with 1 wt% CNT-d-RGO/PEG decreased by 93.1%, and its volume conductivity increased by five orders of magnitude. |
(创新港)
