DETERMINATION OF THE COCOA BUTTER LIQUID SOAP SHAMPOO FORMULA USING RESPONSE SURFACE METHODOLOGY EXPERIMENTAL DESIGN
Authors: Azila Abdul Karim, Nur Azilah Abdullah and Nurul Amisha Abdul Mutalib
Journal Issue: Malaysian Cocoa Journal, Volume 15(2)/2023
Keywords: Cocoa butter liquid soap, surfactant, shampoo, product development
Published On: 27/10/2023
Abstract
This study was conducted to formulate a liquid shampoo using cocoa butter liquid soap (CBLS). The CBLS has to be combined with other commercial surfactants to enhance the physical properties of the final product. The commercial surfactants selected as the factors were CBLS, cocamidopropyl betaine (COBET), decylglucoside (POLYG) and guar gum (GGUM). The final product, which was liquid shampoo in this study, was expected to have a pH of 7-8, a high foaming effect for dirt removal and good rheological properties. Response Surface Methodology (RSM) experimental design was used to determine the factors affecting the product parameter. The results indicated that the pH were significantly affected the factors. The foaming and rheological properties, however, were not significantly affected by the surfactant level in this study. The optimum pH value (pH 7.69+0.046) was obtained at the minimum amount of CBLS at 10 g, COBET at 28.1515 g, POLYG at 5.0215 g and GGUM at 0.4861 g, which was similar to the pH value (pH 7.6929) obtained using the model simulated. Subsequently, the product's rheological and foaming properties were reported in comparison with commercial products in the market.