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Catarina S. Budiyati
Teknik Kimia, Fakultas Teknik Universitas Diponegoro. Jl. Prof. Soedarto , Kampus Tembalang Semarang, 50239
Chemical Engineering, Chemistry & Bioengineering

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Pembuatan dan karakterisasi sabun susu dengan proses dingin Diah S. Retnowati; Andri C. Kumoro; Ratnawati Ratnawati; Catarina S. Budiyati
Jurnal Rekayasa Proses Vol 7 No 2 (2013): Volume 7, Number 2, 2013
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.4951

Abstract

In this research, cold process was chosen to make soap from lye (NaOH solution) and mixture of palm, coconut, castor, and canola oils with certain ratio. This conducted research is to study the effect of palm to canola oil mass ratio and citric acid concentration on pH, hardness, foaming capacity and the cleansing power of the soap. The soap formation was first conducted by dissolving NaOH in the milk with certain concentration sufficient for the oil mixture saponification.The solution and citric acid solution were then added to the oil mixture and was stirred at 400 rpm. After trace occurred, the mixture was transferred to a mold and then was put in an open space for 24 hours. The soap was taken out from the mold and was cured for 4 weeks. The hardness, pH, the foaming capacity, and the cleansing power of the resulted soap were analyzed. The result show that the addition of 2% of citric acid reduces the pH of the soap from 10.2 to 9.8, the hardness, the foaming capacity, and the cleansing ability of the soap. The variation of the ratio of the mass of coconut to canola oil from 0.5 to 2 affects only the hardness of the soap.
Co-Authors Andri C. Kumoro Diah S. Retnowati Ratnawati Ratnawati