Resumen

HENRIQUE, Celina M; CEREDA, Marney P  y  DUPUY, Nataly. Análise de cor, transparência e infravermelho dos filmes de fécula modificada de mandioca Color, transparency and infra-red analysis of modified cassava starch films. Agronomía Trop. [online]. 2007, vol.57, n.1, pp.25-30. ISSN 0002-192X.

The objective of this research was to characterize modified cassava starch films in relation to color, transparency and infra-red spectrum in order to assess their use in the horticulture sector. Films were made with gelatinized suspensions of modified Brazilian starches, including high and low viscosity carboxymethylamide (CMA), as cross link (modified pre-gelatinized) and sterified starches, with 3 and 5% dry matter (MS). The filmogenic solutions were dried for 24 hs/40oC on a plexiglass support. Shortly after drying, films were stored at 20 ºC and 64% relative humidity, equivalent to 0,645 water activity, for 10 days, for later analysis. Films thus obtained were compared, by the methods of color spectrophotometry, transparency and infrared, with low density polyvinyl chloride films (PVC) 0,03 mm thick. All films showed luminosity and transparency similar to PVC film.

Palabras clave : Modified starch; films; packaging; infra-red; color; transparency; biodegradable; Manihot esculenta.