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Polymer Chemistry 2018
Polymer Sciences
ISSN: 2471-9935
Page 33
March 26-28, 2018
Vienna, Austria
3
rd
Edition of International Conference and Exhibition on
Polymer Chemistry
F
or millions of years, nature utilizes microporous polymeric
materials of well-controlled structures of skeletal walls
and pores for their functions. The structures of synthetic
microporous polymers are commonly limited to architectures
of isolated pores, although their preparation methods have
been developed for the critical roles in various applications.
The directional melt crystallization of solvent, a relatively
new versatile preparation method to produce aligned pores
in the forms of 3D patterns, has produced porous structures
of Voronoi and honeycomb-like architecture morphology. By
developing adequate conditions for different polymers, we have
produced various materials having ordered microchannels.
The important parameters, crystallization rate and direction
were controlled by temperature gradient control in 3D space
using a home-made apparatus to prepare defect-free materials
having well-ordered through-thickness microchannels. As
crystals nucleate and grow, solutes form cryoconcentrate
phases, which become skeletal portions, and crystallized
solvents become pores after sublimation. The defect-free
films and cylinders of through-thickness porosity could be
prepared. With the support of nanotemplates, nanospheres,
nanorods, and nanomembranes could be prepared too. This
directional crystallization method controlling pore morphology
offers a versatile route to prepare unique porous polymers
and composites for future environmental, biomedical, and
electronics applications.
Recent Publications:
1. Junseok Kim, Yunho Cho, Soyun Kim, and Jonghwi Lee,
2017, 3D Cocontinuous Composites of Hydrophilic
and Hydrophobic Soft Materials: High Modulus and
Fast Actuation Time, ACS Macro Letters, 6(10), p1119.
2. Byoung Soo Kim, Kangsuk Lee, Soyeon Lee, Jun
Beom Pyo, Kwang-Hoon Lee, In Suk Choi, Kookheon
Char, Jong Hyuk Park, Sang-Soo Lee, Jonghwi Lee*,
Jeong Gon Son*, 2017, 2D reentrant auxetic structures
of graphene/CNT networks for omnidirectionally
stretchable supercapacitors’, Nanoscale, 9, p13272.
3. A.T. Ezhil Vilian, Suyeong An, Sang Rak Choe, Cheol
Hwan Kwak, Yun Suk Huh*, Jonghwi Lee*, and Young-
Kyu Han*, 2017, Fabrication of 3D honeycomb-like
porous polyurethane-functionalized reduced graphene
oxide for detection of dopamine, Biosensors and
Bioelectronics, 86, p1222.
4. Byoung Soo Kim and Jonghwi Lee, 2016, Macroporous
PVDF/TiO
2
membranes with three-dimensionally
interconnected structures produced by directional
crystallization, Chemical Engineering Journal, 301,
p158.
5. Suyeong An, Byoung Soo Kim and Jonghwi Lee,
2016, Porous Polyurethane Films Having Biomimetic
Ordered Open Pores: Indentation Properties, Journal
of Industrial and Engineering Chemistry, 33, p362.
Biography
Jonghwi Lee got his PhD from the University of Michigan, Ann Arbor and
worked for Merck Research Laboratories as a Senior Researcher after his
Post-doctoral training at the University of Minnesota. He won prizes from
The Polymer Society of Korea (Best Paper Award), Korean Society of Indus-
trial Engineering Chemistry (Contribution Recognition Award, Best Paper
Award, Best Industry Collaboration Award), and Chung-Ang University (Ex-
cellence in Achievement Award, Bae Young Soo Award). He has published
more than 150 research papers, and currently a Vice Editor of Journal of
Industrial
and
Engineering Chemistry and Macromolecular Research
. His
research interests are biomedical polymers, polymer composites, porous
polymers and crystallization.
jong@cau.ac.krBio-inspired engineering of microchannels in polymers by
crystallization of solvent
Jonghwi Lee
Chung-Ang University, South Korea
Jonghwi Lee, Polym Sci, Volume 4
DOI: 10.4172/2471-9935-C1-008