Abstract

Dina Sugiyanti^1,2, Sri Anggrahini², Yudi Pranoto², Chairil Anwar³ and Umar Santoso²

DOI : http://dx.doi.org/10.13005/ojc/350122

The limited solubility of chitosan had limiting its application in any fields. Low molecular weight chitosan (LWCS) potentially produced to improve its solubility and characteristics. Steam explosion process was used to breakdown the intermolecular hydrogen bonding and phosphotungstic acid used as catalyst to attact the glycosidic bond and produce shorter chain. The optimum temperature and phosphotungstic acid concentration on steam explosion process presented highest water solubility at T=160^oC and 0.1%, respectively. It didn’t showed any change of functional group on FTIR analysis, no morphological damage by SEM analysis, and reduced the crystallinity. The particle size and molecular weight was reduced from 100 µm to 255 nm and 557 kDa to 4800 Da, respectively. It can be known that LWCS potentially produced with high solubility and fine characteristics through steam explosion process catalyzed by phosphotungstic acid.

Chitosan; Low Molecular Weight Chitosan; Phosphotungstic Acid; Steam Explosion Process

[ View HTML Full Text]