Effect of Compatibilizer on Nanostructure of the Biodegradable Cellulose Acetate/Organoclay Nanocomposites

• Published in: Macromolecules Vol. 37; no. 24; pp. 9076 - 9082
• Main Authors: Park, Hwan-Man, Liang, Xuemei, Mohanty, Amar K, Misra, Manjusri, Drzal, Lawrence T
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 30.11.2004
• Subjects: Applied sciences; Composites; Exact sciences and technology; Forms of application and semi-finished materials; Polymer industry, paints, wood; Technology of polymers; Organic clay; Citrate; Mechanical properties; Nanostructure; Experimental study; Compatibilizer; Functional polymer; Exfoliation; Cellulose acetate butyrate; Plasticizer; Morphology; Concentration effect; Nanocomposite; Cellulose organic ester; Cellulose acetate
• ISSN: 0024-9297; 1520-5835
• DOI: 10.1021/ma048958s

Biodegradable nanocomposites were successfully fabricated from cellulose acetate (CA) plasticized with triethyl citrate (TEC), and combined with Cloisite 30B organoclay, using maleic anhydride grafted cellulose acetate butyrate (CAB-g-MA) as the compatibilizer. The nanostructure of the nanocomposites was investigated by AFM, TEM, and XRD. AFM analysis clearly showed the presence of exfoliated clay platelets in the nanocomposite. Nanocomposites with 5 wt % compatibilizer contents showed better-exfoliated structure than the counterpart without compatibilizer hybrid. The clay platelet polygonal shape was observable by AFM. The exfoliated platelets were characterized to be ∼1.3 nm in thickness, ∼500 nm in width, and ∼800 nm in length. These results correspond to the XRD and TEM analysis. It was showed that the mechanical properties were improved due to good exfoliation and dispersion of clay in the plasticized CA matrix. The 5 wt % compatibilizer loading is optimum for mechanical improvement.