TY - JOUR
T1 - In situ preparation and mechanical properties of CNTs/MCMBs composites
AU - Cheng, Youliang
AU - Li, Tiehu
AU - Fang, Changqing
AU - Liu, Pei
AU - Yu, Ruien
AU - Hu, Jingbo
PY - 2013/4
Y1 - 2013/4
N2 - By adding carbon nanotubes (CNTs) into medium temperature coal tar pitch, mesocarbon microbeads (MCMBs) were obtained via thermal condensation, then CNTs/MCMBs composites were in situ prepared using compression molding. The morphology, structure and mechanical properties of CNTs/MCMBs composites were characterized by optical microscope, digital camera, scanning electron microscope (SEM) and mechanical test machine. Results showed that CNTs were used as the nucleating agent and could inhibit the growth and coalescence of MCMBs. The optical textures of CNTs/MCMBs composites showed similar characteristics to the thermal condensation products from coal tar pitch with CNTs. The mass ratio of CNTs to coal tar pitch played an important role in the mechanical properties of CNTs/MCMBs composites. The density and bending strength of CNTs/MCMBs composite first increased and then decreased with the increase of the proportion of CNTs. When the proportion of CNTs was 5 wt%, the density of the composite reached the maximum (1.76 g/cm3). In addition, the bending strength of the composite reached the maximum (79.6 MPa) as adding 2 wt% CNTs into coal tar pitch.
AB - By adding carbon nanotubes (CNTs) into medium temperature coal tar pitch, mesocarbon microbeads (MCMBs) were obtained via thermal condensation, then CNTs/MCMBs composites were in situ prepared using compression molding. The morphology, structure and mechanical properties of CNTs/MCMBs composites were characterized by optical microscope, digital camera, scanning electron microscope (SEM) and mechanical test machine. Results showed that CNTs were used as the nucleating agent and could inhibit the growth and coalescence of MCMBs. The optical textures of CNTs/MCMBs composites showed similar characteristics to the thermal condensation products from coal tar pitch with CNTs. The mass ratio of CNTs to coal tar pitch played an important role in the mechanical properties of CNTs/MCMBs composites. The density and bending strength of CNTs/MCMBs composite first increased and then decreased with the increase of the proportion of CNTs. When the proportion of CNTs was 5 wt%, the density of the composite reached the maximum (1.76 g/cm3). In addition, the bending strength of the composite reached the maximum (79.6 MPa) as adding 2 wt% CNTs into coal tar pitch.
KW - A. Carbon-carbon composites (CCCs)
KW - A. Nano-structures
KW - B. Mechanical properties
KW - D. Surface analysis
UR - http://www.scopus.com/inward/record.url?scp=84872129420&partnerID=8YFLogxK
U2 - 10.1016/j.compositesb.2012.11.009
DO - 10.1016/j.compositesb.2012.11.009
M3 - 文章
AN - SCOPUS:84872129420
SN - 1359-8368
VL - 47
SP - 290
EP - 297
JO - Composites Part B: Engineering
JF - Composites Part B: Engineering
ER -