Isolation of Cellulose and Starch from Mango Golek (Mangifera indica L) Seed Shells and Its Characterization as Potential New Biocomposites

The increasing use of plastic in life has resulted in pollution. Synthetic plastic is difficult to degrade in nature so that the main ingredients for environmentally friendly plastics are needed from waste, namely cellulose and starch. Cellulose and starch are obtained in mango seeds. These compounds can be used as raw materials or new biocomposite to improve the mechanical and functional properties. Extract mango seed shell was cellulose 35.33%, hemicellulose 9.44% and lignin 6.13% and the inner mango seeds was starch 87.82%. Then analysis of water content 30.94%, ash 0.07%, fat 4.85%, protein content 4.80%, and carbohydrate content 51.96%. Functional group test for mango seed shell cellulose using FT-IR showed absorption peaks are functional group O–H alcohol on 3334.25 cm−1. And the C-H functional group alkane (strain) at 2918.76 cm−1. Mango seed starch while visible aromatic C=C functional group absorption at the 1592.12 cm−1 and the C-O group function at 1050.34 cm−1. C-H group function of alkanes (stretch) at the 2917.58 cm−1 and C=C group of alkenes at the 1729.50 cm−1. Those are also indicate presence of C-O and C-N single bonds and ester groups at the absorption peak at the 1337.09 cm−1.in mango seed starch. The functional groups of cellulose and starch from mango seed showed FTIR are not differ from standard cellulose and starch..