Application of solubility parameters in a D-sorbitol-based organogel in binary organic mixtures

被引:19
作者
Tong, Ciqing [1 ]
Fan, Kaiqi [1 ]
Niu, Libo [1 ]
Li, Jingjing [1 ]
Guan, Xidong [1 ]
Tao, Naimin [1 ]
Shen, Huahua [1 ]
Song, Jian [1 ]
机构
[1] Tianjin Univ, Tianjin 300072, Peoples R China
基金
中国国家自然科学基金;
关键词
GELATORS; GELATION; GELS; MELAMINE;
D O I
10.1039/c3sm52676c
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The gelation behaviour of a low molecular weight gelator 2,4-(3,4-dichlorobenzylidene)-D-sorbitol (DCBS) in a binary solvent system has been studied. DCBS was soluble in pure ethanol and insoluble in pure methylcyclohexane. However, DCBS formed opaque gels in ethanol-methylcyclohexane mixtures when the methylcyclohexane content varied from 50% to 80%. Within this range, an increase in the amount of methylcyclohexane reduced the gelation time and also caused the minimum gelation concentration to decrease. Scanning electron microscopy showed that the three-dimensional network structures of the xerogels became denser (from tape-like structures to uniform fibres) when the methylcyclohexane content increased from 40% to 80%. The precipitates that formed in 90% and 100% methylcyclohexane had rod-like structures. X-ray diffraction of the xerogels showed that in the gel state, the DCBS gelator had lamellar packing, which was different from the structure of the precipitate. Fourier transform infrared spectroscopy of the xerogels showed that H-bonding was a driving force for the self-aggregation of the DCBS and it was enhanced as the methylcyclohexane content increased. To estimate the gelator-solvent interactions, the Flory-Huggins parameter was calculated for the DCBS gelator in the binary mixed solvent systems. Based on the values of the Flory-Huggins parameter, the gelation behaviours could be grouped into four domains (solution, partial gel, gel and precipitation). This is a simple method to predict the gelation behaviour of DCBS in some mixed solvents.
引用
收藏
页码:767 / 772
页数:6
相关论文
共 59 条
[1]  
Abdallah DJ, 2000, ADV MATER, V12, P1237
[2]   Responsive gels formed by the spontaneous self-assembly of peptides into polymeric beta-sheet tapes [J].
Aggeli, A ;
Bell, M ;
Boden, N ;
Keen, JN ;
Knowles, PF ;
McLeish, TCB ;
Pitkeathly, M ;
Radford, SE .
NATURE, 1997, 386 (6622) :259-262
[3]  
[Anonymous], 2006, MOL GELS MAT SELF AS
[4]   SOLUBILITY PARAMETERS [J].
BARTON, AFM .
CHEMICAL REVIEWS, 1975, 75 (06) :731-753
[5]   Solvent Effect on 1,2-O-(1-Ethylpropylidene)-α-D-glucofuranose Organogel Properties [J].
Bielejewski, M. ;
Lapinski, A. ;
Luboradzki, R. ;
Tritt-Goc, J. .
LANGMUIR, 2009, 25 (14) :8274-8279
[6]  
Brandup J., 2005, SOLUBILITY PARAMETER
[7]   PHOTOSTATIONARY FLUORESCENCE EMISSION AND TIME RESOLVED SPECTROSCOPY OF SYMMETRICALLY DISUBSTITUTED ANTHRACENES ON THE MESO AND SIDE RINGS - THE UNUSUAL BEHAVIOR OF THE 1,4 DERIVATIVE [J].
BROTIN, T ;
DESVERGNE, JP ;
FAGES, F ;
UTERMOHLEN, R ;
BONNEAU, R ;
BOUASLAURENT, H .
PHOTOCHEMISTRY AND PHOTOBIOLOGY, 1992, 55 (03) :349-358
[8]   Solvent-tuned multiple self-assembly of a new sugar-appended gelator [J].
Cui, Jiaxi ;
Zheng, Jia ;
Qiao, Wenqiang ;
Wan, Xinhua .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2008, 326 (01) :267-274
[9]   Supramolecular gelling agents: can they be designed? [J].
Dastidar, Parthasarathi .
CHEMICAL SOCIETY REVIEWS, 2008, 37 (12) :2699-2715
[10]   Solvent-gelator interactions-using empirical solvent parameters to better understand the self-assembly of gel-phase materials [J].
Edwards, William ;
Lagadec, Cecile A. ;
Smith, David K. .
SOFT MATTER, 2011, 7 (01) :110-117