Thermal gelation of Pluronic F-127 in ethylene glycol as non-aqueous solvent

被引：8
|
作者：
Fahad, M. [1 ]
Gilbert, M. [2 ]
Dickens, P. [3 ]
机构：
[1] NED Univ Engn & Technol, Dept Ind & Mfg Engn, Karachi, Pakistan
[2] Loughborough Univ Technol, Dept Mat, Loughborough LE11 3TU, Leics, England
[3] Loughborough Univ Technol, Wolfson Sch Mech & Mfg, Loughborough LE11 3TU, Leics, England
来源：
PLASTICS RUBBER AND COMPOSITES | 2012年 / 41卷 / 03期
基金：
英国工程与自然科学研究理事会;
关键词：
Support material; Block co-polymers; FTIR; Gelation; Pluronic F-127; Ethylene glycol; AMPHIPHILIC BLOCK-COPOLYMERS; OXIDE) TRIBLOCK COPOLYMERS; TEMPERATURE-DEPENDENT MICELLIZATION; ANGLE NEUTRON-SCATTERING; AQUEOUS-SOLUTIONS; POLY(ETHYLENE OXIDE); PHASE-BEHAVIOR; STRUCTURAL POLYMORPHISM; POLY(PROPYLENE OXIDE); FTIR SPECTROSCOPY;
D O I：
10.1179/1743289811Y.0000000027
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
Solutions of Pluronic F-127 in ethylene glycol were prepared at different concentrations (10-25%, w/w), and the behaviour of the samples during heating to 150 degrees C was observed. During heating, the solubility of Pluronic in ethylene glycol increased, but no gel formation was observed. However, gel formation in the sample containing 25% Pluronic F-127 was observed near 50 degrees C during cooling, and all the samples become solid upon cooling to 25 degrees C. Fourier transform infrared spectroscopy, differential scanning calorimetry and optical microscopy were performed to analyse the gel formed by 25% Pluronic F-127 in ethylene glycol, and it was found that the gel formation in ethylene glycol was different from the gel formation of Pluronic in water as the latter gels are crystalline in nature whereas the former are amorphous. Hydrogen bonding was considered to be the main factor behind the gel formation.
引用
收藏
页码：148 / 156
页数：9
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