Pre-treatment of glass substrates and post treatment of the surface of single and multiple Chitosan film by heated as wettability

Abstract

In this approach, chitosan thin films have been prepared using single and multiple dip coating method. The glass substrates was heated 100 °C as a pre-treatment and the fabricated thin film were post heated in various temperature: 100 °C, 210 °C, 220 °C and the effect of pre and post heat treatment on their wetting, structural and morphological properties has been investigated. Scanning electron microscopy (SEM and contact angle measurement have been applied for the characterization and study of thin film surfaces. The results of SEM exhibit the aggregation and formation of chitosan films on the surface of substrate changed through applying heat pre-treatment substrates and increasing of heat post temperature to the chitosan surface.Wettability studies showed that the contact angle of prepared thin films was influenced by various parameters such as heat pre-treatment on glass substrates, variation of heat post-treatment and surface morphology.