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alliedacademies
Journal of Biotechnology and Phytochemistry
Volume 1 Issue 3 Chemistry World 2017
Notes:
Page 27
November 13-15, 2017 Athens, Greece
7th World Congress on
Chemistry
Porous support for phase change materials with
integrated enhancement of thermal conductivity and
capacity
Ge Wang
University of Science and Technology Beijing, China
Phase change materials (PCMs) have been widely developed
in thermophysical storage technologies. However, issues
with leakage in the liquid phase and low thermal conductivity of
pure PCMs block their real-world applications. Typically, porous
support can stabilize the PCMs through surface tension action
and capillary forces. However, support with high porosity usually
leads to amorphous structures and low thermal conductivity,
which is inadequate for meeting most power conversion targets.
Therefore, designing novel support with both an integrated high
loading capacity and large thermal conductive properties still
remains a challenge. Recently, our group developed a one-design
many-functions strategy to create metal-organic frameworks
(MOFs) derived porous carbons and 3D porous carbon support
for PCMs. For example, a highly porous carbon (HPC) from
MOFs have been fabricated by using a control carbonization
method. The large mesopores of the support guarantee a high
loading percentage of PEG molecules, and the micropores
induced the surface tension and capillary force to ensure the
high thermal stability of the shape stabilized PCMs. The phase
change enthalpy of shape stabilized PCMs is close to pure PEG
and the thermal conductivity of PEG can be further improved
through porous carbon. 3D conductive network carbon has
been synthesized by employing a direct-calcined CQDs-derived
porous carbon from the aldol reaction. 3D porous carbon offered
large loading space for PCMs, meanwhile, the graphitized sp2-
hybrid carbon nanosheets provide thermally conductive network
and improve thermal conductivity. These SS-PCMs exhibit
excellent thermal conductivity and power capacity.
Biography
Ge Wang has completed her PhD in Chemistry from Michigan Technological
University in 2002. Currently she is a Professor and PhD supervisor in the
School of Material Science and Engineering at the University of Science and
Technology Beijing. In 2012, she became a special Chair Professor endowed by
the Chang Jiang Scholars Program of the Ministry of Education. Her research
interests focus on creating complex materials structures with nanoscale
precision using chemical approaches, and studying their functionalities
including catalytic, energy storage and energy saving properties, etc.
Ge Wang, J Biotech and Phyto 2017