Supramolecular gels with high strength by tuning of calix[4]arene-derived networks

Title
Supramolecular gels with high strength by tuning of calix[4]arene-derived networks
Authors
Jaworski, Justyn Wayne
Keywords
HIGH MECHANICAL STRENGTH; MOLECULAR RECOGNITION; HYDROGELS; POLYMER; WATER; BEHAVIOR; SOLVENT; GELATOR; CLAY
Issue Date
2015-04
Publisher
NATURE PUBLISHING GROUP
Citation
NATURE COMMUNICATIONS, v. 6, Page. 6650-6655
Abstract
Supramolecular 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-molecularweight 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- to 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.
URI
http://www.nature.com/articles/ncomms7650http://hdl.handle.net/20.500.11754/24000
ISSN
2041-1723
DOI
http://dx.doi.org/10.1038/ncomms7650
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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