Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 127, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2019.105650
Keywords
Polylactide; Titanium dioxide; Carbon nanotube; Dielectric property
Funding
- National Key Research and Development Program of China [2016YFB0302300]
- National Natural Science Foundation of China [51873073, 51605086]
- Fundamental Research Funds for the Central Universities [2019MS062]
- Special Support Program of Guangdong Province [2015TX01X151]
- Science and Technology Planning Project of the Department of Science and Technology of Guangdong Province [20178090901062]
- Research Grant Council of HKSAR [T42-103/16N]
- City University of Hong Kong [11216515, SRG 7004918]
- Ten Thousand People's Scheme of Shenzhen University [201810090052]
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Titanium dioxide decorated multi-walled carbon nanotubes (MWCNTs@TiO2) were fabricated in aqueous solution via a facile sol-gel method. The results of TEM, XRD, XPS and TGA confirmed that TiO2 had been coated on the surface of MWCNTs successfully. The polylactide (PLA) nanocomposites containing various content of MWCNTs@TiO2 were prepared by a solution mixing method, followed by a hot compression process. The results revealed that the introduction of MWCNTs@TiO2 enhanced the thermal stability and crystallinity of PLA without affecting the crystal phase. Moreover, the PLA nanocomposite containing of 5 wt% MWCNTs@TiO2 had a dielectric constant of 26.6, which was 8.3 times higher than that of the pure PLA (3.2), while the dielectric loss still remains at a low value of 0.2 at 1000 Hz. The decorated TiO2 nanoparticles on the surface of MWCNTs could serve as insulating layers to suppress the dielectric loss effectively.
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