Photothermal techniques applied to the study of thermal properties in biodegradable films |
| |
Authors: | E San Martín-Martínez M A Aguilar-Méndez A Cruz-Orea A García-Quiroz |
| |
Institution: | (1) Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada-IPN (CICATA-IPN), 11500 México, D.F., Mexico;(2) Departamento de Física, CINVESTAV-IPN, Apdo. Postal 14-740, 07360 México, D.F., Mexico;(3) Universidad Autónoma de la Ciudad de México, D.F., Mexico |
| |
Abstract: | The objective of the present work was to determine the
thermal diffusivity and effusivity of biodegradable films by using
photothermal techniques. The thermal diffusivity was studied by using the
open photoacoustic cell technique. On the other hand the thermal effusivity
was obtained by the photopyroelectric technique in a front detection
configuration. The films were elaborated from mixtures of low density
polyethylene (LDPE) and corn starch. The results showed that at high
moisture values, the thermal diffusivity increased as the starch
concentration was higher in the film. However at low moisture conditions
(<9%) the thermal diffusivity diminished when the starch content in the
sample was increased. On the other hand the thermal effusivity has a
behavior in opposition to the thermal diffusivity. The thermal effusivity
increased with the increase of the starch content in the film, at low
extrusion moisture conditions (6.55%). As the moisture and starch
concentration in the films were increased, the thermal effusivity
diminished. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|