Titre :
|
Water adsorption characteristics and abrasion resistance of starch-based foams
|
Auteurs :
|
Q. Fang ;
M. Hanna
|
Type de document :
|
article/chapitre/communication
|
Année de publication :
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2000
|
Format :
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p. 89-94
|
Langues:
|
= Anglais
|
Catégories :
|
PHYSIQUE ETAT DE LA MATIERE
|
Mots-clés:
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MOUSSE
;
AMIDON
;
EAU
;
ADSORPTION
;
PROPRIETE MECANIQUE
;
POLYMERE
;
BIODEGRADABILITE
|
Résumé :
|
Degradable polymers including Eastar Bio Copolyester 14766 (EBC), Mater-Bi® ZF03U (MBI) and polylactic acid (PLA) blended in various ratios (10, 25, and 40%) with regular (25% amylose) and waxy corn starches were extruded into loose-fill packaging foams using a co-rotating twin screw extruder. No significant differences existed in the water adsorption characteristics of the foams made from regular and waxy corn starches. MBI-starch foams had higher water adsorption capabilities than did the EBC-starch and PLA-starch foams. Equilibrium moisture contents of foams decreased linearly as the polymer contents increased, and increased significantly as the relative humidity increased. Models developed for different polymer-starch blends fit the data well with small standard errors and uniformly scattered residual plots. The testing procedure for abrasion resistance provided an objective measure of foam abrasion resistance. EBC-starch and PLA-starch foams had excellent abrasion resistance (> 99%).
|
Source :
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Transactions of the ASAE, vol.43, n°1
|