Design of high-oleic palm oil nanoemulsions suitable for drying in refractance window™

摘要

Nanoencapsulation is a technique in which high-interest lipids are protected.Refractance Window™ is a novel drying technique designed mainly to convert fruitpuree into powder, flakes, or concentrates. Thus, in this work we study the effect ofwall materials on the moisture content and break distance of flakes obtained by RWfrom emulsions of high-oleic palm oil, also, we study the physical properties of theoptimal nanoemulsions. High whey concentrations originate flakes with low moisturecontent and high break distance. Microfluidization pressure significantly affecteddroplet size, polydispersity index, zeta potential, and surface tension of the optimalnanoemulsions. In this sense, increasing the pressure decreased size and PdI, andincreased ζ and ST. To obtain nanoemulsions suitable for drying in RW, high wheyconcentrations and high microfluidization pressures should be used to promote thestability of nanoemulsions in order to obtain flakes with high break distance and lowmoisture contents.Novelty Impact Statement: High-oleic palm oil nanoemulsions are an excellentchoice for producing flakes using the refractive window technique. This type of dryflakes allows the incorporation of HOPO into products of the food industry since itsproduction process involves the use of low temperatures, protecting the thermolabilecompounds present in this oil, and adding nutritional value to the food product.