STUDY OF THERMAL PROPERTIES OF KAPPA CARRAGEENAN AND MONTMORILLONITE COMPOSITES USING THERMOGRAVIMETRIC ANALYSIS (TGA) & DIFFERENTIAL THERMAL ANALYSIS (DTA) METHODS

• Main Author: Choliq, Muhammad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/74765
• Institution: Institut Teknologi Bandung

Composite materials have many advantages due to the composite properties can be designed. Composite materials are made of a combination of two or more that have different properties, where one material is a filler component. Natural material that is widely used today as a filler is montmorillonite. Kappa carrageenan is used as food material because it is gelling, thickening and also coating to other materials. Composite kappa carrageenan-montmorillonite can be used for cosmetics, textiles, printing as a thickening agent, stabilizer and geller. Thermal properties analysis can determine the thermal resistance of the composite. Therefore, this research aimed to study thermal properties of kappa carrageenan-montmorillonite composite materials using TGA (Thermogravimetric Analysis) and DTA (Differential Thermal Analysis) methods. The composite synthesis was carried out before underwent TGA and DTA testing. The TGA and DTA data were processed using OriginPro software student edition. The data were in the form of weight loss and heat flow for each sample. It was found that water evaporation and degradation occurred in kappa carrageenan and the composites. The water evaporation occurs at <130°C and degradation events occur at 130°C-250°C and 250°C-600°C. Meanwhile, for MMT, there are no physical/chemical events during heating up to 600°C. The MMT content affects the thermal characteristics of the composite, where the higher the MMT content, the lower the degradation temperature of the composite.