Journal of Advanced Chemical Engineering

Formation and stability of highly concentrated W/O emulsions prepared from rapeseed oil

2^nd International Conference on Advances in Chemical Engineering and Technology

November 16-17, 2017 | Paris, France

Endarto Y Wardhono and Mohammad Effendy

USAT, Indonesia
UNESA, Indonesia

Posters & Accepted Abstracts: J Adv Chem Eng

Abstract:

This research was devoted to formulate vegetable oils for seed potatoes treatment against the transmission of potato virus Y (PVY) by the aphids to potato plants. The formulation was improved by using rapeseed oil basis for replacing nonrenewable chemical for products in the market. The preliminary studies indicated that the presence of polysaccharide in the final product to be sprayed on the plants reduced the main factor of the product losses due to the drift itself. Yet polysaccharide cannot be dissolved directly into the tank containing the mixture in field conditions. It swelled when exposed to water and easy for lumps formation as it was swelling. A way to solve this problem is to formulate W/O emulsions by dispersing of an aqueous solution containing a required amount of polysaccharide into the oil phase. The objective of this work is to formulate of highly concentrated W/O emulsions, incorporation of the maximum amount of polysaccharide which shows long stability (over two years). Emulsification was done at room temperature using rotor stator system by dispersing drop by drop of the aqueous phase containing; 3.5% w/w of polysaccharide (guar gum and/or Carboxy Methyl Cellulose, CMC), 10% w/w of plasticizer (glycerol, sorbitol and/or Polyethylene glycol, PEG) in 75% v/v of internal dispersed phase and 14% w/w of surfactant (lecithin and/or PolyGlycerol PolyRicinoleate, PGPR) in the oil continuous phase. Information about the shelf life was obtained by performing accelerated ageing test at which destabilization phenomena during the test were observed by following the evolution of dispersed droplet using Differential Scanning Calorimetry, DSC. The results revealed that the optimum formulation was 3.5% w/w of CMC, 10% w/w of glycerol in 75% v/v of internal dispersed phase and 14% w/w of PGPR in the oil continuous phase. The emulsions shown an adequate stability profile under ageing test condition meant to be stable for two years under normal storage conditions. The use of surfactant PGPR and plasticizer glycerol in the formulation was beneficial. Glycerol reduces lumps formation of polysaccharide in water. Its presence had a tendency to decrease the droplet size, moreover it could be an effective substance to improve the long-term stability of the concentrated W/O emulsion.