Physico-Chemical, Functional and Rheological Characterization of Biodegradable Pellets and Composite Sheets

Abstract

Abstract. Deoiled rice bran, paddy husk, cashew nut shell liquid and glycerol were extruded into pellets and further pressed into composites. Processing and plasticizer type had significant effect on physico-chemical, functional, rheological and morphological properties of pellets and composites. Specific mechanical energy of the pellets containing cashew nut shell liquid as plasticizer was higher than those containing glycerol. The maximum hardness and bulk density were obtained for pellets prepared from cashew nut shell liquid. Water binding capacity and water solubility index of both pellets and composites were highest for samples containing glycerol as plasticizer. A significant change in functional properties during processing was observed among raw materials, pellets and the final product (composite sheets).

Application of Response Surface Methodology in Food Process Modeling and Optimization

“…Studies in extrusion using RSM included optimization extrusion conditions of soybean flour and achda [55], antinutritional factors and protein and starch digestibility of lentil splits [56] optimization of carrot pomace powder [57], and physical and functional properties of extruded snack foods [58]. The effect of banana peel and rice bran extrusion for value addition has also reported [59]. Optimization of extraction conditions for extraction of olive oil [60], flavonoids from shallot skin [61], and phenolic compounds from fruits [62] using RSM have also been reported.…”

Development of Biodegradable Pellets From Ecuadorian Starch and a Rice Sub-Product

“…Biodegradable polymers (BP) could be substitutes for fossil polymers (FP) which are considered an environmental burden. On the other hand, the residues (sub-products) generated by agroindustry processing usually require appropriate disposal due to their content of minerals, starch, sugar, and proteins [1]. Ecuador possesses a wide variety of sub-products; for example, Guayas and Los Rios provinces, where it is cultivated 95% of the country's rice production, release significant amounts of rice bran (a sub-product of the rice milling), rice husks, etc.…”