Organogelation by polymer organogelators with a L-lysine derivative: Formation of a three-dimensional network consisting of supramolecular and conventional polymers

被引:48
作者
Suzuki, Masahiro [1 ]
Setoguchi, Chiho [1 ]
Shirai, Hirofusa [1 ]
Hanabusa, Kenji [1 ]
机构
[1] Shinshu Univ, Grad Sch Sci & Technol, Ueda, Nagano 3868567, Japan
关键词
hydrogen bonding; lysine; organogels; polymer organogelators; supramolecular chemistry;
D O I
10.1002/chem.200700146
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Polymer compounds consisting of a L-lysine derivative and conventional polymers, such as poly(ethylene glycol), polycarbonate, polyesters, and poly(alkylene), have been synthesized and their organogelation properties examined in various solvents. These polymer compounds function as good organogelators that form organogels in many organic solvents and oils. The organogelation ability is almost independent of the polymer backbone. Observation by field-emission scanning electron microscopy (FE-SEM) demonstrates that the polymer organogelators form a supramolecular polymer with a diameter of several tens of nanometers and create a three-dimensional network in organogels. FT-IR spectroscopic analysis shows that the supramolecular polymer is mainly formed by the self-assembly Of L-lysine segments through hydrogen-bonding and van der Waals interactions. Furthermore, the organogels formed by the polymer organogelators have a lower gel-sol temperature and higher gel strength than those of a low-molecular-weight model organogelator.
引用
收藏
页码:8193 / 8200
页数:8
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