Abstract
The relation between molecular orientation and surface active property was investigated on the following oil-soluble organoboron surfactants with a hydrophobic group substituted for one hydroxyl radical.
Glycerol mono (12-hydroxystearoyl) glycerol borate (GHSGB)
Glycerol monoricinoleoyl-glycerol borate (GRGB)
The lowering abilities of interfacial tention of the above surfactants were better than those of glycerol monoacylglycerol borates with an unsubstituted straight hydrophobic group in lower concentration region, but were worse in higher concentration region.
Transition points were observed on both II-A curves of GHSGB and GRGB.
The same short spacing 4.16Å was shown in X-ray diffraction patterns of GHSGB and glycerol monostearoylglycrol borate solidified from the melt.
Two steps interfacial orientations of GHSGB and GRGB were suggested by those results.
