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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.

[email protected]

Bio-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