Chemically Treated Borneo Sago (Metroxylon sagu) Starch Reinforced Poly Lactic Acid Bio-composites

Md. Rezaur, Rahman and Sinin, Bin Hamdan and Rubiyah, Binti Baini and Muhammad Khusairy, Bin Bakri and Muhammad, Adamu and Akshay, Kakar and Khairuddin, Sanaullah and Law, Perry Nyuk Khui (2020) Chemically Treated Borneo Sago (Metroxylon sagu) Starch Reinforced Poly Lactic Acid Bio-composites. Bioresources, 15 (1). pp. 1641-1655. ISSN 1930-2126

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Abstract

Properties of Borneo sago starch reinforced poly-(lactic acid) (PLA) composites were evaluated, with attention to the effects of treatment with acrylic acid, benzene diazonium chloride, and tetrahydrofuran. The PLAsago composites treated with tetrahydrofuran had the highest tensile strength, with a maximum value of 0.85 MPa at 20 wt%; whereas the PLAsago composites treated with benzene diazonium chloride had the highest modulus of elasticity, with a maximum modulus of elasticity of 28 kPa at 5 wt%. Scanning electron microscopy images of the surfaces showed good interfacial contact between the PLA and the sago starch treated with benzene diazonium chloride. The Fourier-transform infrared spectra revealed the functional group characteristics of the chemicals composition of the materials. According to the thermogravimetric analysis results, all of the composites displayed thermal stability up to a temperature of 300 °C. The differential scanning calorimetry analysis revealed that the poly lactic acid-sago composites treated with benzene diazonium chloride had the highest melting point.

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