Nano Research & Applications

The effect of calcium chloride crosslinking on properties of silk sericin/pectin/clay aerogel

World Congress on Materials Science & Engineering
August 23-25, 2018 Amsterdam, Netherlands

Palita Chuaysakul and Rathanawan Magaraphan

The Petroleum and Petrochemical College, Thailand

Posters & Accepted Abstracts: Nano Res Appl

DOI: 10.21767/2471-9838-C4-018

Abstract

Clay aerogel is a porous solid material with an extremely low density and high surface areas. It is usually fabricated from an environmentally benign freeze-drying method and widely used for adsorbent application. One of the disadvantages of clay aerogel is its fragility, thus silk sericin and calcium chloride (CaCl2) crosslinked pectin were chosen to improve not only the mechanical strength but also the swelling behaviour of clay aerogel. Therefore, the aim of this research is to study the effects of CaCl2 on the properties of silk sericin/pectin/clay aerogel. The studied CaCl concentrations were 0.0005, 0.001, 0.002, and 0.003 mol Ca2+ per gram pectin. According to the results, density increased with the addition of cations but still be in the range of clay aerogel density. The mechanical properties showed that 0.002 Ca2+ per gram pectin possessed the highest compressive modulus. The surface area investigated by Brunauer–Emmett–Teller (BET) method decreased as the CaCl2 concentrations were increased. The morphology of aerogels from scanning electron microscopy (SEM) exhibited the rougher surfaces. Moreover, the observed swelling behaviour in water was less with Ca2+.

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