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Polymer Chemistry 2018

Polymer Sciences

ISSN: 2471-9935

Page 53

March 26-28, 2018

Vienna, Austria

3

rd

Edition of International Conference and Exhibition on

Polymer Chemistry

S

upramolecular gels comprised of low-molecular-weight

gelators are generally regarded as mechanically weak and

unable to support formation of free-standing structures, hence,

their practical use with applied loads has been limited. Here, we

reveal a technique for

in situ

generation of high tensile strength

supramolecular hydrogels derived from low-molecular-weight

gelators. By controlling the concentration of hydrochloric acid

during hydrazone formation between calix[4]arene-based gelator

precursors, we tune the mechanical and ductile properties of

the resulting gel. Organogels formed without hydrochloric acid

exhibit impressive tensile strengths, higher than 40 MPa, which is

the strongest among self-assembled gels. Hydrogels, prepared by

solvent exchange of organogels in water, show 7,000-10,000-fold

enhanced mechanical properties because of further hydrazone

formation. This method of molding also allows the gels to retain

shape after processing, and furthermore, we find organogels

when prepared as gel electrolytes for lithium battery applications

to have good ionic conductivity.

Biography

Jong Hwa Jung received his PhD Degrees in Chemistry from Gyeongsang

National University and Kyushu University, Japan in 1993 and 2005, respec-

tively. From 1994 to 2005, he worked as a Postdoctoral Fellow at Osaka Uni-

versity, as a Research Scientist at the Japan Science and Technology Cor-

poration, and as a Principal Researcher at the Korea Basic Science Institute

respectively. He has been a Professor in the Department of Chemistry at

Gyeongsang National University since 2006. His research interest involves:

supramolecular chemistry, organic-inorganic hybrid nanomaterials, func-

tional silica-based nanomaterials, sol-gel chemistry, self-assembled gels,

molecular recognition based nanosensors.

[email protected]

High mechanical strength of supramolecular gels formed via

hydrazone reaction

Jong Hwa Jung

Gyeongsang National University, South Korea

Jong Hwa Jung, Polym Sci, Volume 4

DOI: 10.4172/2471-9935-C1-008