Characteristic of Polylactic Acid (PLA)/Kenaf Composites Degradation by Pleurotus ostreatus

ABSTRACT

Polylactic acid (PLA)/kenaf composite is the latest alternative biocomposite product of wood particle. The research was conducted to determine degradation yield of PLA/kenaf composite based on material weight and mechanical property change, as well as physical form of PLA/kenaf composite observed via both visual and microscopy, was evaluated. The analysis was also conducted on enzyme activity and the degradation characteristics were predicted. A natural isolate, Pleurotus ostreatus, was used as a degrader fungus via entrapment of mycelia in immobilized Ca-alginate beads. This fungus degraded 12%, 21%, 30% and 48% of (PLA)/kenaf composite in the incubation period of 1, 2, 3 and 6 months, respectively. Compared to the control, degradation caused the fibers become shorter and decreased in mechanical properties to be 84%. The color change occurred on the (PLA)/kenaf composite indicated a role of enzymes in the degradation process. The activity of manganese peroxide detected in this study has a value of maximum activity 0.26 U mg-1. P. ostreatus was not only able to degrade the kenaf fiber but also has been able to break down the PLA to their oxidation products.

Keywords: Polylactic acid, kenaf fiber, Pleurotus ostreatus, degradation.

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Informasi Detil

Judul Seri

Proceeding INAFOR (International Conference Of Indonesia forestry researchers) 2011

No. Panggil

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Penerbit

: ., 2012

Deskripsi Fisik

2-25

Bahasa

English

ISBN/ISSN

978-979-8452-45-1

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subyek

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