The aim of this work was to compare the more traditional spray
drying technique (but using a novel nanospray drying device able
to obtain smaller encapsulation structures) with the electrospraying
methodology for folic acid encapsulation using two different
food hydrocolloid matrices (a whey protein concentrate and a
commercial resistant starch). Initially, whey protein concentrate
(WPC) was used since it has excellent functional characteristics,
it is a low cost ingredient and it has proven useful for the encapsulation
of several functional ingredients through electrospinning
(Lopez-Rubio & Lagaron, 2011, 2012).