Morphology Observation of Novel 3, 4-Bis-Alkyloxycarbonyl-Hexanedioic Acid Monolayer on Water Surface by Dropping Method

Yusuke Kobayashi,Yasushi Yamamoto,Zameer Shervani,Daiki Ito,Rina Hirai,Keijiro Taga

doi:10.4236/jbpc.2016.72004

Abstract

We have investigated the morphology of novel 3, 4-bis-alkyloxycarbonyl-hexanedioic acid monolayer (alkyl chain number n = 12, 14, and 16) formed on the water surface by dropping method using Surface Tension measurement (STm) and Brewster Angle Microscopy (BAM). Surfactant of 3, 4-bis-alkyloxycarbonyl-hexanedioic acid has a gemini type structure. π-A isotherm curves (STm) of two gemini surfactants of n = 12 and 14 showed gradual increase in surface pressure, while that of n = 16 showed gradual increase, a stagnant range and finally steep increase. BAM observation showed each image corresponding to the result of STm measurement. From STm and BAM results of surfactants, it is found that surfactant of n = 12 and 14 form Liquid-Expand (LE) type monolayer, while that of n = 16 formed Liquid-Condensed (LC) type monolayer including LE-LC phase transition.

Highlights

Gemini surfactant essentially has a dimer structure at which two monosurfactants are connected by a spacerHow to cite this paper: Kobayashi, Y., Hirai, R., Ito, D., Yamamoto, Y., Taga, K. and Shervani, Z. (2016) Morphology Observation of Novel 3, 4-Bis-Alkyloxycarbonyl-Hexanedioic Acid Monolayer on Water Surface by Dropping Method
In this context we have investigated for the first time the morphology of the novel Gemsurf monolayer formed on the water surface by the dropping method [13] using Surface Tension measurement (STm) and Brewster Angle Microscopy (BAM)
From the results of STm and BAM, it is found that Gemsurf of n = 12 and 14 is LE type monolayer, while Gemsurf of n = 16 is LC type monolayer with LE-LC phase transition

Summary

Introduction

How to cite this paper: Kobayashi, Y., Hirai, R., Ito, D., Yamamoto, Y., Taga, K. and Shervani, Z. (2016) Morphology Observation of Novel 3, 4-Bis-Alkyloxycarbonyl-Hexanedioic Acid Monolayer on Water Surface by Dropping Method. (2016) Morphology Observation of Novel 3, 4-Bis-Alkyloxycarbonyl-Hexanedioic Acid Monolayer on Water Surface by Dropping Method. There is no report of surface properties of Gemsurf behavior at air-water interface. In this context we have investigated for the first time the morphology of the novel Gemsurf monolayer formed on the water surface by the dropping method [13] using Surface Tension measurement (STm) and Brewster Angle Microscopy (BAM).

Monolayer Formation

BAM Observation

Discussion

Findings

Conclusion