期刊
CHEMICAL ENGINEERING JOURNAL
卷 304, 期 -, 页码 970-976出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2016.07.025
关键词
Nanocomposites; Ice templating; Mechanical property; Microstructure
资金
- Natural Science Foundation of China [51272210, 50902112, 51221001]
- Program for New Century Excellent Talents in University [NCET-13-0474]
- Foreign Talents Introduction and Academic Exchange Program of China [B08040]
- Scientific Research Fund of Jilin Provincial Education Department [2015437]
Carbon nanotubes (CNTs) felts of aligned lamellar structure were prepared by ice templating and then infiltrated by liquid epoxy resin by vacuum pressure impregnation (INCNT/EP). Conventional physical blending method was also used to prepare carbon nanotube/epoxy composite as a comparison (PHCNT/EP). Microstructal observations of INCNT/EP fracture surfaces revealed the formation of a three-dimensional (3D) framework composed of unidirectionally oriented CNTs lamellae, which lead to a dramatic increase in electrical conductivity of the composite, by 15 orders of magnitude compared to pure epoxy and by 3 orders of magnitude compared to PHCNT/EP composite. Electrical conductivity of the INCNT/EP composite reached to 0.158 S/cm at CNT loading of 1.31 wt%. Meanwhile, improvements in Young's modulus (up to 25.5%) and yield strength (up to 12.2%) of the INCNT/EP composite under compressive loadings compared to pure epoxy were obtained. It is also observed that INCNT/EP composites show stable compressive behaviour and can effectively resist the sudden decrease of stress due to its skeleton structure of CNTs lamellae after the strain of ca. 50%. (C) 2016 Elsevier B.V. All rights reserved.
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