Pemurnian surfaktan nonionik alkil poliglikosida (APG) berbasis tapioka dan dodekanol

Abstract

Alkyl polyglycosides (APG) , a nonionic surfactant, has got some green labels such as Ecocert, EU Eco-flower and Green Seal as environmentally friendly surfactant. Sugar as APG's raw material, supplied the hydrophilic group, and fatty alcohol acted as hydrophobic group. Some undesirable compounds formed during the APG production had caused low quality. The research aimed to increase the quality and performance of APG, by controlling its process. The catalyst of p-toluene sulfonic acid (PTSA) was added and investigated the effect of catalysis concentration (0,018-0,036 mole per mole of starch) to enhance the butanolysis of starch. Addition 0-10% of activated carbon and 0-0,3% of NaBH4 in APG pre-purification process; 2% (w/w) of H2O2 35% and 500 ppm of MgO in the bleaching process were examined to process high quality and high performance of APG. The results showed that 0.027 mole of PTSA per mole starch and process temperature of 140 OC could minimize the residual sugars after butanolysis. The best APG was obtained from purification step by addition 0% of activated carbon and 0,2% of NaBH4, with the characteristics of clarity of 59,02(%T); the ability to reduce surface and interfacial tensions at 1% concentration were 61,98% and 95,60% respectively; 81,71% of stability of emulsion, 62,5% of foam height and stable up to 315 minutes.