Cassava starch–kaolinite composite film. Effect of clay content and clay modification on film properties

• Published in: Carbohydrate polymers Vol. 88; no. 1; pp. 213 - 222
• Main Authors: Mbey, J.A., Hoppe, S., Thomas, F.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 17.03.2012; Elsevier
• Subjects: Applied sciences; cassava; Chemical and Process Engineering; clay; clay fraction; Composite; composite materials; Composites; dimethyl sulfoxide; Engineering Sciences; Exact sciences and technology; films (materials); Forms of application and semi-finished materials; Glass transition; Kaolinite; Polymer industry, paints, wood; polymers; Starch; Technology of polymers; temperature; Transparency; ultraviolet radiation; Water uptake; Glass transition; Water uptake; Transparency; Kaolinite; Composite; Starch; Clay; Dispersion degree; Glycerol; Experimental study; Glass transition temperature; Composite material; Thermal stability; Polymer filler interaction; Ultraviolet radiation; Plasticizer; Optical properties; Morphology; Moisture regain; Oside polymer; THERMOPLASTIC STARCH; PLASTICIZER; MECHANICAL-PROPERTIES; BLENDS; OOD-PACKAGING APPLICATIONS; GLASS-TRANSITION; NANOCOMPOSITES; BARRIER PROPERTIES; HYBRIDS
• ISSN: 0144-8617; 1879-1344
• DOI: 10.1016/j.carbpol.2011.11.091

► Cassava starch composite film. ► Raw kaolinite and DMSO intercalated kaolinite as filler. ► Dispersion, exfoliation and distribution of the clay filler. ► Consequence on the glass transition and the decomposition temperatures of the starch matrix. ► Effect on the water uptake and the UV–vis blocking. The influence of kaolinite content within a plasticized starch matrix on the glass transition and decomposition temperatures, water uptake, transparency and UV–vis blocking is reported. Exfoliation of the kaolinite clay within the composite is enhanced when previously intercalated with DMSO. The DMSO-intercalated kaolinite brings in advantages for the clay dispersion within the polymer matrix, the transparency and the water uptake. The transparency of the films is better preserved when DMSO intercalated kaolinite is used and a clay load between 2% and 6%, leads to a significant reduction of the UV light transmission.