SYNTHESIS OF STARCH BASED AEROGELS

MOHD HARITH, RAMZI (2020) SYNTHESIS OF STARCH BASED AEROGELS. [Final Year Project Report] (Unpublished)

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Abstract

Porous material made from biomaterial like aerogels has been getting numerous attentions in the research arena lately. Aerogel is classified as a material of light weight and open pores accompanied with high specific surface area. Starch based aerogels are a class of advanced biomaterial made in the same way as bio-aerogels based on other polysaccharides via starch gelatinization, retrogradation, organic solvent exchange, and process of drying. Essentially, there are three most common drying mechanism of aerogel available which are supercritical carbon dioxide drying, freeze drying and ambient pressure drying. This paper reviews the potential outcome of synthesis of starch aerogel via ambient pressure drying based on similar studies conducted previously. This review summarizes the potential functional properties of starch-based aerogel based on similar polysaccharide aerogels like cellulose and chitosan aerogels which were synthesized via ambient pressure drying. Comparative analysis between similar porous materials was executed to reveal any advantages of the former. Thus, through this detailed review on previous polysaccharide aerogels despite having limited studies on starch-based aerogel via ambient pressure drying, the expected result of starch-based aerogel synthesized via this route can be forecasted. This paper analyses essential properties of starchbased aerogel reflected through this processing route such as morphology and microstructure, density and shrinkage, mechanical properties and thermal conductivity of the material. There are numerous ways to achieve variety of morphology and properties by varying the preparation condition to yield varying results tunable to the desired application. Therefore, with chemical and physical modification open up the possibilities of wide range of aerogels’ properties and applications.

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