@article{TIAN2021, 
author = {Wenchao TIAN and Fei YAN and Cailing CAI and Zeyi WU and Chenchen ZHANG and Ting YIN and Sijia LAO and Linfeng HU},
title = {Freeze-drying and hot-pressing strategy to embed two-dimensional Ti0.87O2 monolayers in commercial polypropylene films with enhanced dielectric properties},
year = {2021},
journal = {Journal of Advanced Ceramics},
volume = {10},
number = {2},
pages = {368-376},
keywords = {Ti0.87O2 nanosheets, polypropylene (PP), freeze-drying, surface functionalization, hot-pressing, dielectric constant},
url = {https://www.sciopen.com/article/10.1007/s40145-020-0443-0},
doi = {10.1007/s40145-020-0443-0},
abstract = {The dielectric capacitor has been widely used in advanced electronic and electrical power systems due to its capability of ultrafast charging-discharging and ultrahigh power density. Nevertheless, its energy density is still limited by the low dielectric constant (≈ 2.2) of the commercial dielectric polypropylene (PP). The conventional enhancement strategy by embedding inorganic fillers in PP matrix is still difficult and challenging due to that PP hardly dissolves in any inorganic/organic solvent. In this work, we develop a new strategy including freeze-drying, surface functionalization, and hot-pressing to incorporate Ti0.87O2 monolayers in PP film. A series of uniform composited Ti0.87O2@PP film has been successfully fabricated with Ti0.87O2 content range of 0-15 wt%. The maximum dielectric constant of the as-prepared Ti0.87O2@PP film is 3.27 when the Ti0.87O2 content is 9 wt%, which is about 1.5 times higher than that of pure PP. Our study provides a feasible strategy to embed two-dimensional material into commercial PP thin-film with superior dielectric performance for practical application.}
}