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Diah Riski Gusti
Department Of Chemistry, Faculty Of Science And Technology, Universitas Jambi, Jambi
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Use of Nanoemulsion-Based Merkubung (Macaranga gigantea) Sap Extract Inhibitor to Improve Corrosion Inhibition Efficiency on Steel Naibaho, Adetra Febriani; Putri, Alya Adiningtyas; Natasya, Dian; Sinaga, Grescia Angelita; Fadillah, Wan Nurul; Gusti, Diah Riski
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 27 No. 02 (2026): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol27-iss02/471

Abstract

Corrosion frequently affects steel. Although it is an unavoidable natural process, its progression can be managed and its rate reduced. One strategy for mitigating corrosion is the use of corrosion inhibitors. Inhibitors derived from organic sources are widely employed because of their high inhibition efficiency. Sap extract from Merkubung (Macaranga gigantea) can function as a corrosion inhibitor due to the presence of secondary metabolites such as tannins. Tannins are promising corrosion inhibitors since their –OH groups enable them to form complexes with metal surfaces. This study evaluates the performance of a nanoemulsion containing Merkubung sap extract as a steel corrosion inhibitor. The methodology includes extraction, nanoemulsion formulation, and assessment of corrosion rate and inhibition efficiency at various concentrations and temperatures. In this work, nanoemulsion‑based inhibitors were applied to improve corrosion protection of steel. The nanoemulsion demonstrated the lowest corrosion rate (0.902 mg cm⁻² h⁻¹) and the highest inhibition efficiency (66.05 %) at 500 ppm and 30 °C. These results show that the nanoemulsion enhances inhibition performance, making it an effective corrosion inhibitor.
PENGEMBANGAN MEDIA MOBILE LEARNING CHEMFUN BERORIENTASI HOTS (HIGHER ORDER THINKING SKILL) PADA MATERI LARUTAN PENYANGGA Aulia Rahmi; Harizon Harizon; Diah Riski Gusti
Jurnal Zarah Vol. 11 No. 1 (2023): April, 2023
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v11i1.4838

Abstract

Pada era Industri 4.0 teknologi berkembang begitu pesat, menghadirkan banyak perubahan termasuk pada sektor pendidikan. Strategi pembelajaran bergeser menjadi berorientasi kepada Higher Order Thinking Skills. Peran media pembelajaran digital menjadi kian esensial. Kehadirannya membantu peserta didik memahami pelajaran kapan dan dimana saja. Penelitian ini memiliki tujuan yaitu dihasilkannya media mobile learning berorientasi HOTS yang tervalidasi dan dapat digunakan secara efektif dalam pembelajaran kimia pada kelas XI SMA. Penelitian ini termasuk jenis Penelitian dan Pengembangan (Research and Development), mengadaptasi model pengembangan Lee and Owens. Produk dibuat menggunakan website MIT App Inventor. Validasi oleh ahli materi dan ahli media mendapatkan hasil yang sangat baik, begitupun dengan penilaian guru kimia juga memperoleh kategori sangat baik. Subjek penelitian yakni peserta didik dari SMA Adhyaksa 1 Jambi kelas XI MIPA 2. Respon peserta didik skala kecil memperoleh persentase kelayakan sebesar 85% terkategori sangat baik dan pada skala besar yakni 89% terkategori sangat baik. Hasil paired t-test menerangkan bahwa hasil belajar kimia peserta didik sebelum menggunakan media mobile learning ChemFun berorientasi HOTS berbeda secara signifikan dengan hasil belajar ketika telah menggunakan media.
Use of Nanoemulsion-Based Merkubung (Macaranga gigantea) Sap Extract Inhibitor to Improve Corrosion Inhibition Efficiency on Steel Adetra Febriani Naibaho; Alya Adiningtyas Putri; Dian Natasya; Grescia Angelita Sinaga; Wan Nurul Fadillah; Diah Riski Gusti
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 27 No. 02 (2026): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol27-iss02/471

Abstract

Corrosion frequently affects steel. Although it is an unavoidable natural process, its progression can be managed and its rate reduced. One strategy for mitigating corrosion is the use of corrosion inhibitors. Inhibitors derived from organic sources are widely employed because of their high inhibition efficiency. Sap extract from Merkubung (Macaranga gigantea) can function as a corrosion inhibitor due to the presence of secondary metabolites such as tannins. Tannins are promising corrosion inhibitors since their –OH groups enable them to form complexes with metal surfaces. This study evaluates the performance of a nanoemulsion containing Merkubung sap extract as a steel corrosion inhibitor. The methodology includes extraction, nanoemulsion formulation, and assessment of corrosion rate and inhibition efficiency at various concentrations and temperatures. In this work, nanoemulsion‑based inhibitors were applied to improve corrosion protection of steel. The nanoemulsion demonstrated the lowest corrosion rate (0.902 mg cm⁻² h⁻¹) and the highest inhibition efficiency (66.05 %) at 500 ppm and 30 °C. These results show that the nanoemulsion enhances inhibition performance, making it an effective corrosion inhibitor.
Sintesis dan karakterisasi magnetit terlapis dimerkaptosilika Habib, Abdurrazaq; Ngatijo; Gusti, Diah Riski
Chempublish Journal Vol. 4 No. 2 (2019): Chempublish Journal
Publisher : Department of Chemistry, Faculty of Science and Technology Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/chp.v4i2.8034

Abstract

Synthesis of dimerkaptosilica coated magnetite was carried out in several stages, namely synthesis of magnetite from FeCl3.6H2O and FeSO4.7H2O by coprecipitation method. Extraction of sodium silicate from rice husk ash as a source of silica. Coating magnetite by dimerkaptosilica using 2,3-dimercapto-1-propanol as a source of mercapto groups and sodium silicate as sources of silica. Coating is done by the sol-gel method. FTIR characterization showed the appearance of uptake at wave numbers 894,04 cm-1, 2951,22 cm-1 and 3655,26 cm-1 from several absorbances which also appeared in magnetite material spectra indicating ―SH, ―CH2 and ―OH groups. XRD characterization was characterized by the appearance of a peak at 2θ, which was 35,43° and SEM characterization showed that the material Fe3O4―DMS had a morphological shape in the form of round clumps forming gray-colored aggregates.
Co-Authors Abd. Mutakkin Abdul Manab Abdurrazaq Habib Fadhilah Addion Nizori Ade Adriadi Adetra Febriani Naibaho Adiningtyas Putri, Alya Agnes Vionita Yohana Agus Lintang Widodo Ahmad Sazali Alfernando, Oki Alya Adiningtyas Putri Amanda Amanda Ance Pramai Shella Andini, Paziati Andrian Setyarestu Prayogi Anggi Cahaya Nirwana Angraini, Resti Indah Anisa Anisa Anjelli Putri Gunawan Annisa Dhita Syahrial apriansyah, rendi Ardian Salsa Rusmana Arif Nurrahman Armando, Fitra Armitha Dea Pradina Arsa, Daniel Aulia Rahmi Azril Bagus, Adhitya Eko Betri Yanda Damris Muhammad Damris Muhammad Damris Muhammad Denny Prabawa, Aditya Dhian Eka Wijaya Dian Natasya Dila Oktarise Dwina Dila Oktarise Dwina Djangkung Sumbogo Murti, Sri Dwi Savitri Nur Hidayah Dyah Kumalasari Edwin Permana Edwin Permana Eko Prasetyo Ermita Meisa Manulang Fadhilah, Abdurrazaq Habib Fadillah, Wan Nurul Faiquzzaky, Faiz Faizar Farid Faizar Farid Fajriaty, Rana Farizt Ichsan, Ahmad Fauzan Ramadhan Fitra Armando Fitri, Selta Frandi Mardiansyah Frastica Deswardani Frely Setiawan Sihombing Grescia Angelita Sinaga Gunawan, Anjelli Putri Habib, Abdurrazaq Harizon Harizon Haryanto Haryanto Henry Fonda Aritonang Hidayat, Ali Nurdin Indra Lasmana Tarigan Intan Lestari Intan Lestari Intan Lestari Intan Lestasi Is Heriyanti, Septina Ismet, Lince Muis Khairunnisah, Resilta KurniawanSyah, Gilang Ladiva Adinda Lenny Marlinda Lestari, Intan - Lestasi, Intan Lestasi, Uce M Ikrar Lagowa M. Rifqi Efendi M. Rusdi Maemonah, Maemonah Maharani Martin Horas Parulian Butarbutar Martina Asti Rahayu Mastutik, Diah Maulana, Rico Gewana Resdy Menita Sinurat Mesa Sukmadani Rusdi Mia Aina Mia Aina Mirda Yanti, Fusia Moh Nabawi Moh Nabawi Mounir El Achaby Muhammad Arief Yamin Muhammad Haris Effendi Hasibuan Muhammad Rusdi Munawir Nursyahrobby Munifilia Ekasari Nabela Viviana Naibaho, Adetra Febriani Naswir, M. Natasya, Dian Nelson Nelson Nelson NEVIATY PUTRI ZAMANI Ngatijo Ngatijo Ngatijo Ngatijo Ngatijo Ngatijo Ngatijo Nindita Clourisa Amaris Susanto Nuraini, Syafira Nuralang Nuralang Nurul Pratiwi Oki Alfernando Oktarise Dwina, Dila Pradina, Armitha Dea Prasetio, Muhamad Reza Puspa Dwi Pratiwi Putra, Adrisma Juanda Putri Pandulu, Clara Putri Ramadhanti Putri Ramadhanti, Putri Putri, Alya Adiningtyas Putri, Andinni Qisthi, Zummul Qurrata Aini Ragil Johanda Rahma Aini Sapitri Rahmi Rahmi Rahmi Rahmi Ratih Dyah Puspitasari Resilta Khairunnisah Restianingsih, Tika Restina Bemis Restina Bemis Revis Asra Ria Gracia Sibarani Rif’at Syauqi Safitri Safitri Safitri Safitri Sani K, Fathnur Sibarani, Ria Gracia Sihotang, Andreas Silvia Devi Eka Putri Sinaga, Grescia Angelita Sinurat, Menita Siregar, Hamdan Maruli Sriwati Azis Sudibyo Sudibyo Sudibyo Sudibyo Sukor, Mohd Zaki Susanto, Nindita Clourisa Amaris Tajuddin, Nazrizawati Ahmad Toyyibah, Fida Tri Haryati Tri Siswanto Uce Lestari Uce Lestari Uce Lestasi Wahyudi Zahar Wahyudi, Abdi Wahyuningsih, Iga Walidatur Rofiah, Yuliana Wan Nurul Fadillah Warni Warni Wulansari wulan Yanova, Shally Yehezkiel Dwi Wahyu Situmerang Yoga Andika Yohana, Agnes Vionita Yuli Evrianti Br Rajagukguk Yusria Putri, Desta