Rice flour is a low-cost starchy material, produced from rice that is broken during processing. Rice flourbased
films have promising application on food packaging, because of their environmental appeal and
low cost. Nevertheless, their mechanical and moisture barrier properties should be improved. The aim of
this study was to develop biodegradable films based on rice flour and enhance their properties by
reinforcing them with cellulose fibers. In this way, rice flour films with and without fibers were prepared
by casting, with glycerol or sorbitol as plasticizer. Their physicochemical, microscopic and mechanical
properties were studied. SEM analysis of films revealed compact structures. Films prepared with fibers
presented lower water vapor permeabilities if compared with films without fibers. Films containing
sorbitol were less permeable to water and more rigid. The incorporation of fibers reinforced mechanically
the flour-based films, which presented higher tensile strength, but did not influence their deformation
capacity. Therefore, preparing biodegradable films from rice flour is a new alternative of using
this raw material. The use of cellulose fibers as reinforcing agent is a viable alternative to improve the
properties of rice flour-based films, because they are biodegradable and available at low cost.
Rice flour is a low-cost starchy material, produced from rice that is broken during processing. Rice flourbasedfilms have promising application on food packaging, because of their environmental appeal andlow cost. Nevertheless, their mechanical and moisture barrier properties should be improved. The aim ofthis study was to develop biodegradable films based on rice flour and enhance their properties byreinforcing them with cellulose fibers. In this way, rice flour films with and without fibers were preparedby casting, with glycerol or sorbitol as plasticizer. Their physicochemical, microscopic and mechanicalproperties were studied. SEM analysis of films revealed compact structures. Films prepared with fiberspresented lower water vapor permeabilities if compared with films without fibers. Films containingsorbitol were less permeable to water and more rigid. The incorporation of fibers reinforced mechanicallythe flour-based films, which presented higher tensile strength, but did not influence their deformationcapacity. Therefore, preparing biodegradable films from rice flour is a new alternative of usingthis raw material. The use of cellulose fibers as reinforcing agent is a viable alternative to improve theproperties of rice flour-based films, because they are biodegradable and available at low cost.
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