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All Journal IPTEK The Journal of Engineering IPTEK The Journal for Technology and Science Seminar Nasional Teknik Kimia Kejuangan JURNAL INTEGRASI PROSES Indonesian Journal of Chemistry Jurnal Chemurgy CHEESA: Chemical Engineering Research Articles JPP IPTEK (Jurnal Pengabdian dan Penerapan IPTEK) Jurnal Teknologi Indonesian Community Journal Sewagati International Journal of Renewable Energy Development
Achmad Dwitama Karisma
Departemen Teknik Kimia Industri, Institut Teknologi Sepuluh Nopember, Kampus ITS, Keputih, Sukolilo, Surabaya 60111
Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Mechanical Engineering Public Health Social Sciences Other

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Karakteristik Biokomposit Edible Film dari Campuran Kitosan dan Pektin Limbah Kulit Pisang Kepok (Musa acuminata) Zuchrillah, Daril Ridho; Pudjiastuti, Lily; Puspita, Niniek Fajar; Hamzah, Afan; Karisma, Achmad Dwitama; Surono, Agus; Altway, Saidah; Ardiani, Liana; Rohmah, Nur Azizatur; Ningrum, Eva Oktavia
CHEESA: Chemical Engineering Research Articles Vol. 3 No. 1 (2020)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (859.628 KB) | DOI: 10.25273/cheesa.v3i1.6659

Abstract

Kemasan plastik banyak digunakan pada industri makanan dan minuman di Indonesia karena praktis dan mudah. Namun, disisi lain ini merupakan bencana bagi lingkungan karena plastik merupakan bahan yang sulit terurai (nondegradable). Edible film merupakan salah satu alternatif yang dapat dipertimbangkan untuk menggantikan kemasan plastik. Tujuan dari penelitian ini adalah memanfaatkan kitosan dari limbah cangkang rajungan dan pektin dari limbah kulit pisang kepok sebagai bahan baku pembuatan edible film. Kitosan diperoleh dari proses degreasing, deproteinasi, demineralisasi dan deasetilasi cangkang rajungan. Pektin diperoleh dari proses hidrolisis kulit pisang kepok. Edible film yang berbasis kitosan dan pektin dibuat melalui proses blending dengan ratio (K:P) 100:0; 60:40; 50:50: 40:60 dan 0:100. Analisis karakteristik yang dilakukan meliputi warna, transparan, ketebalan, kelarutan dalam air, laju transmisi uap air (WVTR), kadar air, swelling degree, biodegradabilitas, dan aktivitas antimikroba. Hasil penelitian menunjukkan edible film kitosan dan pektin yang paling optimal adalah ratio 50:50.
Optimization of ultrasonication time on the production of ZnO-SiO2 nanocomposite as photocatalytic material Qomariyah, Lailatul; Faizah, Nurul; Karisma, Achmad Dwitama; Rabbani, Sulthan; Kalloka, Sultan Hendra Mahardi; Putra, Nicky Rahmana
International Journal of Renewable Energy Development Vol 14, No 5 (2025): September 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.61248

Abstract

Nanocomposite ZnO-SiO2 is widely known for its efficacy as a semiconductor photocatalyst. Current nanocomposite production methods face challenges like particle agglomeration and inconsistent particle size control. To overcome this problem, the ultrasonication method was used to prevent agglomeration and produce composites in nanoscale, where this study synthesized ZnO-SiO2 for photocatalytic degradation of dye color. To prepare this nanocomposite, the ultrasonication time was varied from 0 to 45 minutes to understand the particle properties and the effectivity on the photocatalytic activity. Silica was prepared from water glass via sol-gel method to produce colloidal SiO2 nanoparticles and then mixed with ZnO with the ratio of 3% wt and subjected to ultrasonication method. Under various ultrasonication time, the FTIR analysis shows the Si-O peak at 895 cm-1 indicates the presence of SiO2 particles. The XRD validate the formation of ZnO-SiO2 nanoparticles, supporting the FTIR analysis. The best nanoparticle properties were achieved with 45 minutes of ultrasonication. The SEM analysis confirms the present of SiO2 and ZnO. From BET analysis, ZnO-SiO2 has a high surface area (117.64 m2/g), moderate pore volume (0.46 cm3/g), and small particle pore size (11.59 nm). The photocatalytic activity of ZnO-SiO₂ nanocomposites was evaluated by the degradation of methylene blue (MB) under sunlight and the best performance reached by the nanocomposite prepared under 45 minutes ultrasonication. The results show that the ultrasonication technique efficiently reduces agglomeration, as indicated by a reduction in particle diameter from 35.04 nm (pure ZnO) to 11.59 nm (ZnO-SiO₂), and significantly enhances photocatalytic activity, achieving 97% degradation of MB under sunlight after 180 minutes. The aforementioned technique demonstrates significant potential for industrial use, providing higher efficiency and expandability in manufacturing superior photocatalytic substances.
Pembuatan Biokompatibel Suture Anchor Berbasis 3D Printing Filament dari Nano Hidroksiapatit Berbahan Dasar Cangkang Keong Sawah Zhafira, Tesa Ulima; Berlian, Baskoro David; Karisma, Achmad Dwitama
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Suture anchor is used to attach soft tissues to the bone. One of the materials that can be used for making suture anchors is hydroxyapatite [Ca10(PO4)6(OH)2]. Hydroxyapatite (HAp)  has similarities with the properties of bone minerals, so it has the potential to be used as a material for making biocompatible suture anchors. However, HAp is brittle and has poor strength, so HAp is usually combined with polymers such as composites to overcome the limitations of its mechanical properties. One of the polymers that can be used is Polycaprolactone (PCL). In this study, HAp was synthesized from rice field snail shells, due to its high calcium contents.  Further, the combination of HAp and PCL in the manufacture of 3D printing filaments such as suture anchors was obtained. The variables used in this study were the mixing ratio of HAp:PCL in making filaments with a mixing ratio of 0.5:9.5; 1:9 ; 2:8. The results of various variables shows that the tensile strength most optimal composite in 7,3 % when mixing HAp:PCl is 0.5:9,5.
Sintesis Nanohidroksiapatit Berbahan Cangkang Keong Sawah (Pila ampullacea) dengan Variasi Konsentrasi H3PO4 Menggunakan Metode Ultrasound Assisted Precipitation Karisma, Achmad Dwitama; Kriswanto, Oktavianus Nugroho; Rachmaningtrias, Renda
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Nanohydroxyapatite with the molecular formula Ca10(PO4)6(OH)2 is a calcium phosphate compound that is most widely used in biomedical applications such as bone and dental implants due to its high biocompatibility. The synthesis of nanohydroxyapatite can be carried out using CaCO3 rich materials such rice field snail shell (Pila ampullacea) with a composition of 93.4% CaCO3. The nanohydroxyapatite synthesis method used is Ultrasound Assisted Precipitation. Calcium obtained from the natural material of rice field snail shell (Pila ampullacea) was reacted with H3PO4 precursor at variable 0.3; 0.5; 0.8; 1; 1.3 M until a precipitate of nanohydroxyapatite particles was formed. To determine the effect of H3PO4 concentration, analysis was conducted on the characteristics of the synthesized nanohydroxyapatite. The SEM-EDX analysis revealed a Ca/P ratio of 1.59-1.72 with spherical particle morphology. The FTIR analysis indicated the presence of hydroxyapatite in the sample through the P-O and O-H functional groups.
Co-Authors Adi Soeprijanto Afan Hamzah, Afan Agung Subyakto Agus Surono Agus Surono Agustiani, Elly Agustiani, Elly Ali Altway Altway, Saidah Anggraeni, Agnes Surya Putri Ardiani, Liana Aris Tjahyanto Ash Shiddiqi, Qifni Yasa Atletiko, Faizal Johan Atria Pradityana Ayu Sari Larasati Bambang Hari Prabowo Berlian, Baskoro David Deden Eko Wiyono Ely Agustiani Eva Lestiana Pratiwi Goto, Motonobu Inayah, Yasmin Isyarah Labbaika Shaffitri Kalloka, Sultan Hendra Mahardi Kriswanto, Oktavianus Nugroho Lailatul Qomariyah Lailatul Qomariyah, Lailatul Lily Pudjiastuti, Lily Lulu Sekar Taji Machmudah, Siti Mentari Rachmatika Mukti Niniek Fajar Puspita, Niniek Fajar Nugroho, Muhammad Aldi NURUL FAIZAH Prameswari, Regita Prameswari, Virdha Alifyana Prida Novarita Trisanti, Prida Novarita Putra, Nicky Rahmana Qifni Yasa Ash Shiddiqi Rabbani, Sulthan Rachmaningtrias, Renda Rafina Pertiwi Putri Rohmah, Nur Azizatur Suprapto Suprapto Suprapto Suprapto Suprapto Suprapto Susilo, Muhammad Rizky Aulia Tantular Nurtono Tetrisyanda, Rizky Triastuti, Warlinda Eka Ulum, Muhamad Bahrul Wahyudiono, Wahyudiono Warlinda Eka Triastuti Widiyastuti, Widiyastuti Winardi, Sugeng Zhafira, Tesa Ulima Zuchrillah, Daril Ridho Zuchrillah, Daril Ridho