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All Journal JCER (Journal of Chemistry Education Research) Kumawula: Jurnal Pengabdian Kepada Masyarakat Jurnal Abdi: Media Pengabdian Kepada Masyarakat Sains dan Matematika Jurnal Pijar MIPA Unesa Journal of Chemistry
Dina Kartika Maharani
Jurusan Kimia, FMIPA, Universitas Negeri Surabaya
Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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Isolation and Characterization of Nanocellulose from Rice Husk (Oryza sativa L.) Waste Through Chemical and Ultrasonication Treatment Paramitha, Viona Witya; Maharani, Dina Kartika
Jurnal Pijar Mipa Vol. 20 No. 6 (2025)
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i6.9632

Abstract

Rice husk waste is one of the abundant lignocellulosic biomass sources in Indonesia and holds significant potential as a raw material for nanocellulose production. This study aims to isolate nanocellulose from rice husk through a combination of chemical and mechanical treatments to obtain a product with high crystallinity and nanoscale particle size. The isolation process involved several steps: alkali treatment using NaOH to remove hemicellulose, bleaching with H2O2 to degrade lignin, and acid hydrolysis using H2SO4 to eliminate the amorphous regions of cellulose. The resulting cellulose suspension was then subjected to ultrasonic treatment to further reduce particle size and achieve a more homogeneous dispersion, followed by freeze drying to obtain stable dry nanocellulose powder. Characterization using Fourier Transform Infrared Spectroscopy (FTIR) revealed changes in chemical structure, marked by the disappearance of lignin and hemicellulose peaks and the dominance of hydroxyl (-OH) and C-O functional groups, indicating increased cellulose purity. The nanocellulose yield obtained from this process was 38.15%, calculated based on the dry weight of nanocellulose relative to the initial dry weight of rice husk used. This value falls within the typical range reported for nanocellulose isolation using sulfuric acid hydrolysis and suggests that the applied method was effective in converting rice husk biomass into nanocellulose. The relatively high yield also supports the viability of rice husk as a sustainable and cost-efficient raw material for nanocellulose production. These findings demonstrate that rice husk waste can be effectively converted into high-quality nanocellulose through combined chemical and mechanical approaches, offering a sustainable and value-added solution for various functional materials, biodegradable packaging, and polymer composite applications.
Preparasi dan Karakterisasi Komposit Kitosan-TiO2/ZnO Sebagai Agen Hidrofobik dan Antibakteri pada Kain Katun Lailiyah, Nur; Fadhila, Kayla Naulia; Ramadani, Novita Indah; Maharani, Dina Kartika
Sains dan Matematika Vol. 7 No. 1 (2022): April, Sains & Matematika
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/sainsmat.v7n1.p51-57

Abstract

Penelitian ini bertujuan untuk membuat material komposit baru berbasis polimer alam dan material anorganik dan aplikasinya pada bidang industri tekstil terutama pada masker kain yang bersifat waterproof dan anti bakteri melalui proses pelapisan kain. Data yang didapatkan dari penelitian ini secara umum terdiri dari data kualitatif dan kuantitatif. Analisis dilakukan secara deskriptif kualitatif. Komposit kitosan-TiO2/ZnO dipreparasi dari larutan kitosan yang dicampurkan dengan TiO2 dan ZnO menggunakan metode sol-gel. Komposit kitosan-TiO2/ZnO dilapiskan pada kain menggunakan metode dip-coating dengan variasi volume TiO2/ZnO 7:3; 6:4; 5:5; 4:6; dan 3:7. Uji hidrofobisitas (Sifat waterproof) dengan menggunakan pengukuran WCA (water contct angel) diperoleh sudut kontak tertinggi pada komposit kitosan-TiO2/ZnO dengan perbandingan 7:3 sebesar 153o, selanjutnya komposit tersebut dikarakterisasi dengan menggunakan XRD dan FTIR hasil FTIR menunjukkan adanya interaksi kitosan dengan TiO2 dan ZnO yang ditandai dengan adanya bilangan gelombang pada daerah 850 cm-1, 1336 cm-1 dan 1027cm-1. Hasil karakterisasi XRD dihasilkan puncak pada 25; 34,27; 48,5; 52; 62 dan 68o menunjukkan adanya TiO2 dan ZnO serta Puncak karakteristik kitosan berkisar antara 10,1o dan 20,2o, hal ini menunjukkan komposit kitosan-TiO2/ZnO memiliki kristalinitas yang tinggi. selain itu diuji antibakteri dengan bakteri Staphylococcus aureus didapatkan diameter zona bening terbesar yakni dengan variasi 7:3 sebesar 11,3 mm.
SINTESIS SELULOSA DARI LIMBAH AMPAS TEBU (Saccharum Officinarum L.) DENGAN METODE HIDROLISIS ASAM DAN ULTRASONIKASI Balqis Saniatul Mukarromah; Maharani, Dina Kartika
Unesa Journal of Chemistry Vol. 14 No. 1 (2025): Vol 14 No 1 (2025)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ujc.v14n1.p28-32

Abstract

The annual increase in sugar factory production can lead to a yearly rise in bagasse waste. An alternative to minimize the increase in bagasse waste is to utilize it as nanocellulose. Bagasse contains 52.7% cellulose, 20% hemicellulose, and 24.2% lignin. The synthesis of nanocellulose was carried out using a combination of chemical and mechanical methods, namely acid hydrolysis and ultrasonication, resulting in a final yield of 39.96%. The FTIR spectra of raw bagasse and bagasse-derived nanocellulose showed changes indicating that the synthesis successfully removed non-cellulosic components such as lignin and hemicellulose. After the nanocellulose synthesis process, a small shoulder appeared at a 2θ angle of 14.5˚, indicating that the synthesis had successfully removed most of the amorphous structures such as lignin and hemicellulose. The nanocellulose from bagasse exhibited two diffraction peaks at 2θ angles of 16.2˚ and 22.2˚, which are characteristic of type I cellulose.
Co-Authors Amaria Amaria Ayunda, Defi Balqis Saniatul Mukarromah DIAN SAVITRI Fadhila, Kayla Naulia Hery Widijanto Kusumawati Dwiningsih Lydia Rohmawati Monica, Maria Muchlis Muchlis Naulia, Kaila Nita Kusumawati NUR LAILIYAH Nurzulla, Weka Firda Rizki Paramitha, Viona Witya Pirim Setiarso Putri, Firstania Diah Cahyani Ramadani, Novita Indah Ramadanti, Awanda Halida Rhamdiyah, Fastabiqul Khairati RUSLY HIDAYAH Rusmini Rusmini Safitri, Rizka Dwi Samik Samik Sanjaya, IGM Sari Edi Cahyaningrum Savana, Raisza Tarida Sururi, Ahmad Misbakhus Wati, First Ambar