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All Journal Reaktor Jurnal Teknik Kimia
Agustin, Yuana Elly
University Of Surabaya
Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Energy Materials Science & Nanotechnology

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SINTESIS BIOPLASTIK DARI KITOSAN-PATI KULIT PISANG KEPOK DENGAN PENAMBAHAN ZAT ADITIF Agustin, Yuana Elly; Padmawijaya, Karsono Samuel
Jurnal Teknik Kimia Vol 10, No 2 (2016): JURNAL TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnal_tekkim.v10i2.537

Abstract

Bioplastik adalah plastik biopolimer yang mudah diuraikan oleh mikroorganisme sehingga dapat menjadi alternatif pengganti plastik komersial. Pengaruh komposisi pati kulit pisang Kepok dan kitosan terhadap sifat fisis bioplastik yang disintesis dipelajari melalui penelitian ini. Dalam penelitian ini juga didapatkan komposisi optimum pembuatan bioplastik berbahan kitosan dan pati kulit pisang Kepok dengan penambahan gliserol dan seng oksida (ZnO). Pada penelitian ini bioplastik disintesis dari kitosan sebagai backbone, filler pati pengoptimal sifat biodegradabilitas, gliserol sebagai plasticizer, serta ZnO sebagai penguat. Hasil bioplastik dikarakterisasi sifat mekanik (tensile strength dan elongation), swelling, WVTR, dan FTIR. Berdasarkan hasil penelitian didapatkan komposisi optimum penyusun bioplastik, yaitu kitosan 4% - 30% pati – 5 ml gliserol – 5% ZnO dengan nilai tensile strength sebesar 0,6012 MPa, 0,1688% elongasi, nilai WVTR sebesar 81,5263 gram/m2.jam.Gugus fungsi utama dari bioplastik ditunjukkan melalui hasil analisa FTIR seperti -OH (3431 cm-1), C-H (2923 cm-1), -NH (1632 cm-1), dan Zn-O (585 cm-1).
Response Surface Approach for Optimization of Protein Hydrolysis from Reutealis trisperma Cake as Potential Animal Feedstock Yuana Elly Agustin; Lieke - Riadi; Titie Prapti Utami
Reaktor Volume 20 No.1 March 2020
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (411.442 KB) | DOI: 10.14710/reaktor.20.1.26-31

Abstract

The conditions for protein hydrolysis were optimized to prepare Reutealis trisperma cake for potential animal feedstock. The cake’s content was 34.03 % protein, 6.32 % moisture, 18.56 % total sugar, 15.58 % lipid and 25.51% others. Other components in cake could be fibre and lignin. The cake is a byproduct of mechanical pressing process of the seeds and contains high protein content (34.03%). It was ground prior the hydrolysis process. A central composite design including concentration of NaOH, ratio of cake to NaOH, time and temperature were used to develop second order model to predict protein content under various experimental conditions. Protein yield was primarily affected by ratio pressed cake to NaOH and concentration of NaOH. Based on the Response Surface Methodology (RSM) model, maximum yield of protein was 11.33% which was obtained at cake/solvent ratio 1: 50; 1.5 % w/v NaOH; 15 minutes of hydrolysis at 40oC. The actual maximum protein yield from the experiment was obtained at cake/solvent ratio 1: 40; 1.5 % w/v NaOH; 20 minutes of hydrolysis at 45oC which was 21.28 %.Keywords: animal feedstock; protein hydrolysis; response surface; Reutealis trisperma
Co-Authors Lieke Riadi Padmawijaya, Karsono Samuel Titie Prapti Utami