Design Synthesis And Application Of Dual Function Organic Gels

In recent years, supramolecular structures from the functionalization of small moleculeby self-assembly gradually become an important means of development of new materialsand nano device. In a new type of self-assembled materials, organic small molecule gelfactors, such as hydrogen bonding interaction, π-π interaction, Van Der Waals force, canform orderly three-dimensional network structures, such as in biological materials andself-healing materials with potential application prospects. On the basis of previous work,several dual mixed gels based on alkyloxy-substituents benzoic acid compounds and2-aminobenzoimidazole/2-amino benzothiazole were designed and synthesized. Theirgelation behaviors were studied and a variety of methods were used to characterize thesexerogels. The study for eight groups of as-formed synthetic gels showed that the longerthe chain length of oxygen alkyl substituents of benzoic acid seems to be the better gelling,formation of the gel is also more stable. Imidazole and thiazide as different gel factor,gelling behaviors are also different.In addition, several kinds of pyridine derivatives and several kinds of acids wereprepared to form mixed gels in different organic solvents and2-aminobenzoimidazole/2-aminobenzothiazole and several kinds of aliphatic acid mixedgel in different solvents. The two kinds of mixed gel gelation behavior and the resultsshowed that molecular alkyl chain length, molecular structure, molecular species andsolvents, can influence the form and structures of these binary gels. In these binary mixedgels, hydrogen bonds were produced. And in the gel formation, hydrogen bonds betweenamino and carboxyl reaction and van der Waals force are the main driving forces of theseorganic gel formations. These gelled solvent molecules bound in three dimensionalnetwork structures and formed the jelly or gelatinous substance. Several kinds of gelfactors mixed with Congo red gel was selected and characterized. The drug-releaseexperiments was proceed by use of the distilled water, and the mixed with organic gelproperties of Congo red were characterized. Experimental results showed that with theincrease of Congo red molecules has influenced the microstructure, and molecules of alkyl chain length, molecular structure, and molecular species and replace groups led to thedifferent release rate of the solvent for Congo red.