Journal
MACROMOLECULAR MATERIALS AND ENGINEERING
Volume 303, Issue 7, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mame.201800053
Keywords
gas barriers; graphene; nanocomposites; polyimide; thermal properties
Funding
- National Natural Science Foundation of China [51603066]
- NSAF [U1730142]
- Natural Science Foundation of Hunan Province [2017JJ3055, 2018JJ3120]
- Hunan Provincial Department of Education [17K028, 16B068]
- Student Innovation and Entrepreneurship Training Program of China [201711535002]
Ask authors/readers for more resources
Graphene nanosheets are prepared by solution-phase exfoliation of graphite and successfully incorporated with polyimide to obtain polyimide/graphene (DABPI/G) nanocomposites via in situ polymerization. Compared with those of pure DABPI, the DABPI/G nanocomposites exhibit better barrier and thermal properties. The oxygen and water vapor transmission rates of the DABPI/G (0.5 wt%) nanocomposite are 0.69 cm(3) m(-2) d(-1) and 0.44 g m(-2) d(-1), respectively, which are 92 and 85% lower than those of pure DABPI. Meanwhile, the DABPI/G (0.5 wt%) nanocomposite exhibits excellent thermal stability with a T-d5% of 578 degrees C and a coefficient of thermal expansion of -0.19 ppm K-1. The excellent barrier and thermal properties of DABPI/G nanocomposites are mainly attributed to the fine dispersion and orientation of the graphene nanosheets, increased crystallinity, and low free volume of the DABPI matrix. These are the result of the dual-plane structure effect, which is the synergistic orientation effect between the rigid planar molecular chains of DABPI and the nanosheets of graphene.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available