The amount of waste tomato before and after harvest is about 5% and 15%, respectively, and its yield in the industry after processing is about 70-90%. In this study, purified cellulose is first produced by alkaline and dyeing treatments. The production efficiency was 14.54%, white purity about 92% of cellulose. To increase the crystallization percentage and reduce the particle size, they were treatmented by acid hydrolysis with sulfuric acid (64%W/W). Due to the increase in hydrolysis intensity at 50? with increasing crystallization time, particle size and yield of production of nanocrystal cellulose decreased, but at 45? with amorphous hydrolysis, the crystallization percentage of the samples increased while the yield of nanocrystal production and particle size decreased. The sample produced under acid hydrolysis at 45? for 30 minutes was selected as the optimal sample. The results of a Scanning electron microscopye showed that these particles have a spherical morphology whit size of 104±10.7 nm. FTIR results showed that the removal of hemicellulose, lignin, pectin and other non-cellulosic impurities. XRD data indicated an increase in crystallization percentage. The results of TGA revealed a decrease in the thermal resistance of CNC after alkaline treatment and acid hydrolysis. CNCs in different concentrations (0.5, 1, 1.5 and 2%) were used to stabilize oil in water emulsions(10 to90) and the results showed that by increasing the concentration of nanocrystalline, stability of the emulsion increased to heat tensions, as well as storage time. Keywords : Cellulose nanocrystals; Pickling Emulsion; Tomato pomace
