The Behavior of ¿-A Isotherm with Increasing Amount of Calix[4]arene at Air–Water Interface (16 - 21)

Authors

  • N.A. Azhari
  • F.L. Supian
  • M.M. Abd Karim

Keywords:

Calixarenes, Langmuir film, surface pressure

Abstract

The surface pressure-mean molecular area (¿-A) isotherm of surfactant (Mat 7) wasobtained by using Langmuir-Blodgett technique. The characterization of Mat 7 Langmuirfilm was carried out in terms of ¿-A isotherm. The Langmuir monolayer was successfullyformed by spreading the Mat 7 solution directly at air-water interface. The optimumcondition such as the volume of surfactant loaded on thesubphase was studied. It isobserved that with increasing amount of Mat 7 on water surface, ¿-A isotherm shiftedtowards the left. The mean surface area occupied by each Mat 7 molecule was estimatedby extrapolating the linear portion of each curve (between 10 and 20 mN/m) to a surfacepressure equal to zero. The UV-Visible spectra of Mat 7 in chloroform showed a significant result. The absorption peak increased as more concentrated solution was added.

Downloads

Download data is not yet available.

Downloads

Published

2014-12-08

How to Cite

Azhari, N., Supian, F., & Karim, M. A. (2014). The Behavior of ¿-A Isotherm with Increasing Amount of Calix[4]arene at Air–Water Interface (16 - 21). EDUCATUM Journal of Science, Mathematics and Technology, 1(2), 16–21. Retrieved from https://ejournal.upsi.edu.my/index.php/EJSMT/article/view/20