Abstract
THE present study evaluated the possibility to form thin film of cationic guar gum (COG) associated with poly (carboxylic acid) such as carboxymethyl cellulose (CMC) and poly (acrylic acid) (FAA) through layer-by -layer f_LbL) assembly. The thin film thickness and morphology show dependence on pH value, ionic strength and temperature. For pH to pH 4 COG and poly (carboxylic acids) assemble and form thin film through LK. For neutral pH region and high pH values COG and poly (carboxylic acids) do not interacted. In contrast to synthetic polyelectrolyte complex thin film, such as polystyrene sulfonate (PSS)/ poly (diallyldimethylammoniumchloride) (PDDA) and FSS/ poly (allylamine hydrochloride) (PAH), the LlTh assembly of COO/CMC and CGG/PAA take place only at low salt concentrations. Deposition at high temperature (up to 60 degrees C) results thicker COO/ poly (carboxylic acids) films.