Characterization Of Homo- And Copolysiloxanes Through Langmuir-Blodgett Technique

Hydrophilic backbone chain and hydrophobic organic groups substituted at the chain gave the amphiphilic property of polysiloxane. This property is a great interest as it can form Langmuir monolayer, an orderly arranged layer that can be utilized in any potential nanoscale application. Hence, a study was conducted on surface pressure, surface potential and effective dipole moment of various homopolysiloxanes and copolysiloxanes Langmuir film to clarify some of their monolayer properties. A NIMA Langmuir 611D trough accompanied with a NIMA Surface Potential (S-POT) probe was employed. Space-filling model or known as Corey, Pauling and Koltun (CPK) precision molecular models have been used to construct the siloxanes unit of each set of polysiloxanes as to estimate the siloxane unit size. Moreover, the effect of temperature on maximum effective dipole moment (µ﬩max) of each polysiloxanes also been carried out. As the temperature increased, the µ﬩max decreased. These results can be applied for the potential application study of polysiloxanes.