The gelation rule of the polyol acetal derivatives in binary solvent mixtures  

作　　者：Nan-Xiang Zhang Peng Lin Jing-Jing Li Jia-Hui Liu Bao Zhang lian Son 

机构地区：[1]School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China [2]The Co-Innovation Center of Chemistry and Chemical Engineering of Tianjin, Tianjin 300072, China [3]Tianjin Engineering Research Center of Functional Fine Chemicals, Tianjin 300350, China

出　　处：《Chinese Chemical Letters》2018年第2期276-280,共5页中国化学快报（英文版）

基　　金：the financial support of the National Natural Science Foundation of China(No. 21476164);Tianjin Science and Technology Innovation Platform Program(No. 14TXGCCX00017)

摘　　要：The gelation properties of polyol acetal derivatives including 2,4-（3,4-dichlorobenzylidene）-D-sorbitol（DCBS）, 1,3：2,4-di（3,4-dichlorobenzylidene）-D-sorbitol（DDCBS） and 1,3：2,5：4,6-tris（3,4-dichlorobenzylidene）-D-mannitol（TDCBM） in 35 single solvents and 39 binary solvent mixtures have been studied. FTIR and XRD results suggest that the self-assembly patterns of the gelator will not change in either the single solvent component or the corresponding solvent mixtures, but the critical gelation concentration（CGC）will be influenced. The results of SEM and rheology showed that the formation of true gels at saturated concentrations. Improving the heating temperature may promote the dissolving of gelators which are even insoluble at the temperature of the solvent boiling point and change the gelation behaviors. FloryHuggins parameter（x） was used to predict the gelation behavior of DCBS in the mixed solvents, and it is shown that the x values for the mixed solvents that can be gelled by DCBS are either greater or smaller than those for the selected good solvents.The gelation properties of polyol acetal derivatives including 2,4-（3,4-dichlorobenzylidene）-D-sorbitol（DCBS）, 1,3：2,4-di（3,4-dichlorobenzylidene）-D-sorbitol（DDCBS） and 1,3：2,5：4,6-tris（3,4-dichlorobenzylidene）-D-mannitol（TDCBM） in 35 single solvents and 39 binary solvent mixtures have been studied. FTIR and XRD results suggest that the self-assembly patterns of the gelator will not change in either the single solvent component or the corresponding solvent mixtures, but the critical gelation concentration（CGC）will be influenced. The results of SEM and rheology showed that the formation of true gels at saturated concentrations. Improving the heating temperature may promote the dissolving of gelators which are even insoluble at the temperature of the solvent boiling point and change the gelation behaviors. FloryHuggins parameter（x） was used to predict the gelation behavior of DCBS in the mixed solvents, and it is shown that the x values for the mixed solvents that can be gelled by DCBS are either greater or smaller than those for the selected good solvents.

关 键 词：Supramolecular gel Saturated concentration Mixed solvents Teas plot Self-assembly pattern High temperature and pressure 

分 类 号：O648.17[理学—物理化学]