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Journal : Reaktor

Synthesis of Sorghum Starch–PVA/Gelatin Bioplastics Reinforced with Sorghum Stem Cellulose Nanofibers via Blend Ratio Tailoring Darni, Yuli; lismeri, lia; Ginting, simparmin br; Setiawan, Aris
Reaktor Volume 25 No.2 August 2025
Publisher : Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.25.2.%p

Abstract

This study aims to synthesis of sorghum starch–PVA/gelatin bioplastics reinforced with sorghum stem cellulose nanofibers through blend ratio tailoring in order to obtain bioplastics with properties comparable to LDPE. The mass ratios of sorghum starch to PVA/gelatin are varied at 9:1 and 8:2 (g/g), with a composition of 70% sorghum starch and 30% PVA. The nanofiber filler variations are 0 g, 0.1 g, and 0.2 g. Both starch and gelatin are sieved to 200 mesh. In the bioplastic fabrication process, glycerol concentration is set at 10% (w/w), with a stirring time of 35 minutes, gelatinization temperature of 95 °C, and stirring speed of 375 rpm. The analyses include tensile strength testing, elongation testing, functional group analysis using FTIR, morphological observation with SEM and TEM, and structural characterization with XRD. The best performance is achieved at a sorghum starch-PVA:gelatin mass ratio of 8:2 (g/g) with 0.2 g of nanofiber filler. The resulting bioplastic exhibits a tensile strength of 13.91 MPa, elongation of 3.00%, Young’s modulus of 4.63 MPa, water absorption of 1.8%, and density of 0.52 g/ml.
Co-Authors Abda Abda Abrar, Azzami Agus Riyanto Agustian, Muhammad Rizki Agustin, Veni Tri Akbar, Muhammad Rafli Amalia, Faza Anandati, Ghea Maulidaco Anggraeni, Pangesti Aris Setiawan Aryanti, Annisa Asmara, Panji Azhar Azhar Azhar Azizah, Ara Annastasya Azwar, Edwin Azzahra, Syifa Damayanti, Sri Ismiyati Darmansyah DARMANSYAH . Dewi, Febrina Yohana Donny Lesmana Eltri, Amandha Putri Feerzet Achmad Fikrah, Faizatul Gomiyati, Nada Afifah Gunawan, Poernomo Hakim, Rifqi Amirul Harahap, Fahmi Alif Utama Harahap, Katrina Herdiana, Novita Heri Rustamaji Herry Wardono Herti Utami Heru, Heru Immadudin, Muhammad Iqbal Irfan, Muhammad Muslim Krisanti, Aknasasia Virginia Lestari, Hilda Lismeri, Lia M. Haviz Marlina, Arlin Marlina, Titi Mayanti, Eva Miranda, Thalya Muhammad Hanif Nandi Haerudin Nandini, Ni Putu Ariessa Novarani, Tika Novirianti, Luthfiah Novri Tanti, Novri Nugrahini, Panca Oktapia, Sri Panca Nugrahini Febriningrum Pandiangan, Kamisah Delilawati Pebriyanti, Dita Persada, Citra Pista, Annisa Fitria Putri, Erisha Qorimah, Akhlatul Rahmi, Hertantri Yulia Rianto, Yoga Rifqi Fadhilah Irsa Riyadi, Lutfia Rahma Rizky, Agita Amy Rustamaji, Galuh S Salfitri, Selvy Sanjaya, Mitra Dimas Sapitri, Refia Saputra, Muhammad Galuh Simanjuntak, Ecclesya Agata Simparmin br Ginting Solly Aryza Sri Ratna Sulistiyanti Sri Ratna Sulistyanti Sudibyo Sudibyo Sulha, Mutia Takagi, Ryosuke Tasry, Nazwa Aulia Tosty Maylangi Sitorus, Tosty Maylangi Utama, Swarna Dharma Utami, Rhiki Sekti Zari, Poppy Meutia