ESTD PERPUSTAKAAN UNTAD
ESTD PERPUSTAKAAN UNTAD
| JudulPENGARUH WAKTU REAKSI ASETILASI PATI BIJI DURIAN (Durio Zibethinus Murr) TERHADAP DERAJAT SUBSTITUSI DAN VISKOSITASNYA |
| Nama: ATIKA PUTRI NATALIA MEROKU |
| Tahun: 2021 |
| Abstrak Research has been carried out on the modification of Durian Seed Starch (Durio Zibethinus murr) using 4?etic anhydride. This study aims to determine the effect of the reaction time of starch acetylation from durian seeds (Durio zibethinus murr) on the degree of substitution and viscosity with the Acetylation method. The research design used was a completely randomized design (CRD) consisting of 4 levels of reaction time, namely 15, 30, 45, and 60 minutes and natural starch as a comparison which was repeated three times so that there were 12 experimental units. The value of the highest degree of substitution at 60 minutes is 0.164 and the value of Viscosity is obtained at a reaction time of 60 minutes, which is 723 cp. The carbonyl group peak at 1737.86 cm-1 appears in the FTIR spectrum. The intensity of this peak increased with a decrease in the peak intensity of the hydroxyl group at 3,000-3,600 cm-1, indicating that the hydroxyl groups in starch were replaced by acetyl groups. Keywords: Durian seeds (Durio Zibethinus), Starch, Acetylation, Reaction time, Viscosity, Degree of Substitution. |