Structural and Thermomechanical Study of Plastic Films Made from Cassava-Starch Reinforced with Kaolin and Metakaolin

作     者：Namory Meite Léon Koffi Konan Drissa Bamba Bi Irié Hervé Goure-Doubi Samuel Oyetola 

作者机构：Laboratory of Materials Chemistry Felix Houphouet Boigny University Cocody-Abidjan Ivory Coast Laboratory of Water Chemistry Training School of Abidjan (ENS) Abidjan Ivory Coast Laboratory of Biological Sciences Péléforo Gon Coulibaly University of Korhogo Korhogo Ivory Coast 

出 版 物：《Materials Sciences and Applications》 (材料科学与应用期刊（英文）)

年 卷 期：2018年第9卷第1期

页      面：41-54页

学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学] 

主　　题：Cassava Starch Plastic Films Kaolin Metakaolin Stress at Break Young’s Modulus 

摘      要：The structural and thermomechanical properties of starch-based plastic films reinforced with kaolin and metakaolin have been studied by various techniques (X-ray diffraction, IR-TF spectroscopy, scanning electron microscopy, tensile tests, and thermal resistance). The results obtained showed that kaolin, an inert material, prevents the starch from losing its granular structure and to solubilize during the heating, generating plastic films of low Young’s modulus (7 MPa). On the other hand, metakaolin, an amorphous and dehydroxylated material obtained after heating of kaolin at 700°C for 1 hour, substantially improves the thermomechanical properties of the plastic films. The Young’s modulus increases from 19 MPa to 25 MPa while the thermal resistance increases from 90°C to 120°C. This was attributed to good dispersion of the metakaolin in the polymer matrix after the loss of the granular structure of the starch during heating.