Chemical Compound Evaluation of Polylactic Acid from L(+)-Lactic Acid Monomer Obtained through Cassava Fermentation by Rhizopus oryzae

Abstract:

In this study, L(+)-lactic acid (LLA) from cassava fermentation by Rhizopus oryzae NRRL 395 was used as monomer in polymerization through direct polycondensation reaction. HPLC analysis of the fermented product was carried out to confirm the presence of LLA, through the matching of retention time compared to the standard of LLA. The chemical compound in poly (L-lactic acid), PLLA was evaluated after polymerization through direct polycondensation of LLA at 180°C, with the presence of tin (II) 2-ethylhexanoate as catalyst. Fourier Transform Infrared Spectrometry (FTIR) was used to characterize the functional groups, which were ester carbonyl group (C=O and C―O―C), and C-H stretching of the methyl and methine groups (―CH₃ and ―CH₂) of the resulting PLLA.

• Periodical: Advanced Materials Research (Volume 1113)
• Pages: 523-527
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1113.523
• Online since: July 2015
• Authors: Wan Nasrin Afifa Wan Daud*, Abdul Aziz Ishak, Syafiza Abd Hashib, Miradatul Najwa Mohd Rodhi
• Keywords: Cassava Fermentation, Direct Polycondensation, Fourier Transform Infrared Spectrometry (FTIR), L(+)-Lactic Acid, Rhizopus Oryzae

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