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All Journal Bionatura Jurnal Sains Materi Indonesia Jurnal Teknologi Journal of Mathematical and Fundamental Sciences Journal of Engineering and Technological Sciences Jurnal Dampak Jurnal Riset Industri Majalah Kedokteran Gigi Indonesia Jurnal Zeolit Indonesia Jurnal Keramik dan Gelas Indonesia Jurnal Ilmiah Arena Tekstil Dental Journal (Majalah Kedokteran Gigi) Padjadjaran Journal of Dentistry Journal of Science and Applicative Technology Journal Of Vocational Health Studies Indonesian Journal of Chemistry Mesin ENSAINS JOURNAL JURNAL SELULOSA Fullerene Journal of Chemistry E-Prodenta Journal of Dentistry Jurnal Material Kedokteran Gigi Jurnal Teknologi Bahan dan Barang Teknik Jurnal Keramik dan Gelas Indonesia Jurnal Riset Teknologi Pencegahan Pencemaran Industri Journal of Health and Dental Sciences Makara Journal of Science Sonde (Sound of Dentistry)

Bambang Sunendar P

Institut Teknologi Bandung

Author-ID : 240479

Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Dentistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences

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Pengaruh Penambahan Kitosan dan Asam Sitrat terhadap Pembentukan LiMn2O4 Spinel menggunakan Metode Sol-Gel Martinus Simatupang; Lia Asri; Bambang Sunendar Purwasasmita
Jurnal Teknologi Bahan dan Barang Teknik Vol 5, No 2 (2015)
Publisher : Center for Material and Technical Product

Spinel LiMn2O4is widely developed as cathode in lithium batteries because of its high energy density. In this work, spinel LiMn2O4 was synthesized using sol gel method with addition of chitosan and citric acid as chellating agent. Densification of powder was done at calcination temperature of 600°C. The addition of 1% chitosan (w/v) increased mass fraction of spinel LiMn2O4 up to 73.9%, whereas the addition 0.2 M of citric acid showed no significant effect on formation of spinel LiMn2O4, but it could prevent particles agglomeration. Optimum condition for synthesis of spinel LiMn2O4was obtained by combining chitosan and citric acid as chellating agent, resulting in particles with crystallite size of 28 nm and conductivity of 9.38 x10-6 s/cm2.LiMn2O4 spinel banyak dikembangkan untuk katoda dalam baterai lithium karena memiliki kerapatan energi yang tinggi. Dalam penelitian ini, LiMn2O4 spinel disintesis menggunakan metode sol-gel dengan kitosan dan asam sitrat sebagai senyawa pengkelat. Densifikasi dilakukan pada suhu kalsinasi 600°C. Penambahan kitosan 1% (w/v) mampu meningkatkan fraksi massa fasa LiMn2O4 spinel hingga 73,9% (w/w). Penambahan asam sitrat 0,2 M ke dalam prekursor yang mengandung kitosan tidak memberikan hasil yang signifikan terhadap pembentukan fasa LiMn2O4 spinel, namun berperan dalam mencegah aglomerasi partikel. Kondisi optimum sintesis LiMn2O4 spinel diperoleh dengan penambahan kombinasi kitosan dan asam sitrat sebagai senyawa pengkelat, menghasilkan ukuran kristalit 28 nm dan konduktivitas sebesar 9,38 x10-6 s/cm2.

THE EFFECT OF CHITOSAN SOLUTION ADDITION ON THE SIZE OF NANO CERAMIC PARTICLES IN ZrO2-Al2O3-SiO2 SYSTEM THROUGH BOTTOM-UP METHOD AS DENTISTRY RAW MATERIAL Yanwar Faza; Zulia Hasratiningsih; Nina Djustiana; Bambang Sunendar
Journal of Health and Dental Sciences Vol. 2 No. 2 (2022): Journal of Health and Dental Sciences
Publisher : Fakultas Kedokteran Gigi Unjani

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ABSTRACT Ceramics is a dental material used often because of its relatively good strength and aesthetic properties. Ceramics such as zirconia, alumina, and silica have different characteristics and have been synthesized using a bottom-up method separately. Recently, many studies have used chitosan solution to help synthesize nanometer-sized ceramic materials processed using the bottom-up method. This study aims to produce ZrO2-A12O3-SiO2 nanoparticle ceramics, which were synthesized simultaneously using the bottom-up method, and to see the effect of volume concentration of chitosan solution on the resulting ZrO2-A12O3-SiO2 ceramic particles. The composition ratio of ZrO2:Al2O3:SiO2 used is 3:1:1 with a concentration of 0.05M and a total volume of 500ml. The chitosan solution was added with a volume percentage of 0%, 5%, 10%, 15%, and 20%, respectively, and was named samples A, B, C, D, and E. The XRD (X-Ray Diffraction) and SEM (Scanning Electron Microscopy) characterization of the five samples showed nano-sized particles, which were 87 nm, 85 nm, 81 nm, 76 ran, and 76 nm. SEM characterization results show that sample A's particle distribution is not very visible; the particle distribution is only seen in samples B, C, D, and E, while the best particle distribution is seen in sample C. This study concludes that the optimal volume concentration of adding chitosan solution to produce nano-sized ZrO2-A12O3-SiO2 ceramics with good particle distribution is 10% by volume percentage. DOI : 10.54052/jhds.v2n2.p257-266

Properties of nanocellulose and zirconia alumina on polymethylmethacrylate dental composite Eva Febrina; Angela Evelyna; Andrie Harmaji; Bambang Sunendar
Dental Journal Vol. 56 No. 1 (2023): March 2023
Publisher : Faculty of Dental Medicine, Universitas Airlangga https://fkg.unair.ac.id/en

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/j.djmkg.v56.i1.p30-35

Background: Polymethylmethacrylate (PMMA) is one of the synthetic polymers generally used for temporary jacket crown restorations because of its good translucency, making its aesthetic value higher, but its mechanical properties, such as hardness and flexural strength are lower than composite resins. Hence, adding zirconia and cellulose filler is necessary to enhance its mechanical properties. Purpose: This is an experimental laboratory study to make nanocomposites with PMMA as a matrix with crystalline nanocellulose, zirconia, and alumina added as fillers. Methods: The crystalline nanocellulose filler was synthesized by acid hydrolysis. Zirconia and alumina were synthesized using the sol-gel technique and then characterized by transmission electron microscope and X-ray diffraction. The Micro Vickers hardness test and three-point bending tested mechanical properties. The analysis was carried out with a one-way analysis of variance, followed by a post hoc Tuckey’s test with a P < 0.05 taken as statistically significant. Results: The Micro Vickers hardness test showed the highest hardness in the group with a ratio of PMMA and zirconia-alumina filler of 50%: 2%: 48% (12.73 VHN). The results of the three-point bending test showed that the highest flexural strength was found in the control group (19.4 MPa). Conclusion: The addition of crystalline nanocellulose, zirconia, and alumina increase the hardness of the nanocomposite, while the flexural strength was lower than PMMA without filler addition.

Isolasi Nanoselulosa Terkarboksilasi dari Limbah Kulit Pisang Ambon Lumut dengan Metode Oksidasi Ashari Budi Nugraha; Ahmad Nuruddin; Bambang Sunendar
Journal of Science and Applicative Technology Vol 5 No 1 (2021): Journal of Science and Applicative Technology June Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v5i1.413

In this study, banana peel from ambon lumut (Musa acuminata) was used as source for nanocellulose fibers. Carboxylated nanocellulose was isolated with oxidation method using ammonium persulfate (APS). In order to investigate the effect of temperature towards the characteristics of nonocellulose, temperature for oxidation process was set at three different values: 60 Â°C, 70 Â°C, dan 80 Â°C. Nanostructure of cellulose was observed as a mix of fibers and whiskers from transmission electron microscopy (TEM) images. The diameter of nanocellulose is ranging from 12,1 to 25,1 nm. Data from spectrometry graphs (FTIR) confirms the existence of carboxyl functional groups in nanocellulose samples. X-ray diffraction pattern (XRD) shows that crystallinity index values increase as temperature of oxidation process increases. The highest crytallinity index value of 72,4% was obtained from nanocellulose treated with oxidation temperature of 80 Â°C. This analysis shows banana peel waste as a potential alternative source for carboxylated nanocellulose.

Mechanical And Microstructural Assessment Of Synthetic Aluminosilicate Based Geopolymer Dental Material Andrie Harmaji; Oqy Diadara Putri; Bambang Sunendar
Jurnal Kimia Fullerene Vol 7 No 2 (2022): Fullerene Journal of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v7i2.425

Orthodontic treatment with fixed brackets was performed to transmit the pressure from the wire to the periodontal tissues to produce tooth movement. Ceramic material can be used not only to improve the aestheticness but also maintains good mechanical properties. This study aims to determine the mechanical properties and morphological of synthetic aluminosilicate based geopolymer for aesthetic orthodontic brackets applications made by synthesizing alumina (Al2O3), silica (SiO2), and magnesia (MgO) from sol-gel method. Geopolymer nanocomposite was made by activating synthetic precursor with alkali solutions consists of sodium hydroxide (NaOH) and sodium silicate (Na2SiO3) solution which has molarity variations of 8M (GP-8M) and 14M (GP-14M). The test results using an X-Ray Diffractometer (XRD) showed that the crystalline phase of (Mg,Si)Al2O4 spinel was successfully presented in the synthesized nanocomposite. The average hardness test results using the Vickers hardness tester for Geopolymer Nanocomposite with 8M and 14M alkali activator were 259.15 and 298.90 VHN, respectively. The results of the surface morphological characterization using Scanning Electron Microscope (SEM) of the samples showed the porosity of GP-14M was smaller than GP-8M, which explains the hardness test value difference. This shows Geopolymer is a potential material for orthodontic brackets manufacture.

Laboratory Scale Production of Lithium Manganese Oxide as Active Material of Lithium-Ion Batteries in Sol-Gel Method Assisted by Local Biomass Muhammad Ilham Bayquni; Susanto Sigit Rahardi; Elsy Rahimi Chaldun; Bambang Sunendar Purwasasmita
Jurnal Teknologi Bahan dan Barang Teknik Vol 10, No 2 (2020)
Publisher : Balai Besar Bahan dan Barang Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37209/jtbbt.v10i2.178

Experimental and theoretical studies of the production of lithium manganese oxide (LiMn2O4) using sol-gel method have been carried out on a larger scale than previous studies. The purpose of this investigation was to observe sample behavior along the synthesis process to be considered in further scale-up production of lithium manganese oxide, based on the sol-gel method. Calcination products were analyzed by TGA and crystalline phase formation analyzed by XRD. LiMn2O4 spinel phase was formed at 600oC. SEM showed some interesting morphology. Xerogel swelling was observed overwhelmingly during drying at 250oC to 300oC. Exothermic occurrence as a source of irregular and unpredictable auto combustion in the calcination process. Both phenomenon were not observed in a xerogel made with a small amount precursor. Therefore, initial mixture adjustment and additional steps were considered for production.

FLEXURAL STRENGTH OF PINEAPPLE LEAF FIBER REINFORCED METAKAOLIN ZIRCONIA CARBONATE APATITE GEOPOLYMER COMPOSITE Andrie Harmaji; Susanti Nurfadhila; Bambang Sunendar
Jurnal Teknologi Vol 15, No 2 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.2.237-246

Developments in the materials engineering have encouraged the incorporation of minerals such as kaolin, zirconia, and carbonate apatite, and natural materials. Indonesia, which has a tropical climate, is overgrown with pineapple plants. Geopolymer is a brittle ceramic material so it is necessary to increase its flexural strength value for composite application. Pineapple leaf fiber can be used as reinforcement in geopolymer composites. This study aims to analyze the effect of adding pineapple leaf fiber (Ananas comosus (L.) Merr.) to the mechanical properties and morphological characteristics of metakaolin-zirconia-carbonate apatite-based geopolymer composites. The use of chitosan coupling agent as a binder between the matrix and filler. The research sample consisted of 4 groups with a total of 5 samples in each group. Fiber varied 0-4% in Geopolymer Composites. Geopolymer Composite samples were tested for flexural strength and Scanning Electron Microscope (SEM). The test results showed that the addition of pineapple leaf fiber increased the flexural strength of the geopolymer composite. The composite without the addition of fiber had a flexural strength of 11.24 MPa, while the addition of 1%, 2.5%, and 4% pineapple fiber resulted in a flexural strength of 20.71 MPa, 11.57 MPa, and 11.01 MPa. The results of the SEM test show a picture of the void with varying sizes. The SEM Images of composite with the addition of 4% pineapple fiber showed the formation of Na2CO3 which explained the decrease in flexural strength compared to the sample without pineapple fiber addition.

SINTESIS DAN KARAKTERISASI NANOSELULOSA SEKAM PADI SEBAGAI BAHAN PENGUAT MATERIAL KEDOKTERAN GIGI Agus Imam, Dian Noviyanti; Ryana Budi Purnama; Bambang Sunendar Purwasasmita
E-Prodenta Journal of Dentistry Vol 7 No 2 (2023)
Publisher : Fakultas Kedokteran Gigi UB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.eprodenta.2023.007.02.2

Latar belakang: Tanaman padi merupakan tanaman pangan pokok yang banyak tumbuh di Indonesia. Limbah pertanian seperti sekam padi dapat dimanfaatkan untuk mendapatkan selulosa. Selulosa berukuran nano atau yang disebut nanoselulosa memiliki beberapa keunggulan diantaranya berskala nano, high surface area dan sifat optis yang baik sehingga partikel nanoselulosa dapat berpotensi digunakan sebagai penguat polimer dan aditif produk yang biodegradabel. Tujuan: untuk mensintesis dan mengkarakterisasi nanoselulosa berbahan sekam padi dengan menggunakan Fourier Transform Infrared (FTIR) dan Transmission Electron Microscopy (TEM). Metode: eksperimental kualitatif. Sampel penelitian berupa gel hasil sintesis nanoselulosa berbahan sekam padi yang diuji dengan menggunakan Transmission Electron Microscopy (TEM) untuk melihat morfologi mikrostruktur dan serbuk nanoselulosa diuji menggunakan Fourier Transform Infrared (FTIR) untuk melihat gugus fungsi yang terkandung dalam nanoselulosa sekam padi. Hasil: Hasil karakterisasi menggunakan Fourier Transform Infrared (FTIR) menunjukkan terbentuk selulosa dari olahan sekam padi, sedangkan hasil Transmission Electron Microscope (TEM) menunjukkan ukuran partikel selulosa dalam skala nanometer dan morfologi partikel yang berbentuk nano-whisker. Kesimpulan: Sintesis nanoselulosa berbahan sekam padi dengan metode hidrolisis asam berhasil dilakukan dan diharapkan mampu memberikan potensi untuk meningkatkan sifat mekanis material kedokteran gigi.

Studi Pengolahan Air Limbah Batik pada Skala Industri Rumah Tangga dan Usaha Kecil Menengah di Cirebon, Indonesia Diyah, Nazuwatussya’; Ratuannisa, Tyar; Ekawati, Estiyanti; Yulia, Elfi; Purwasasmita, Bambang Sunendar; Nugraha, Ashari Budi
Dampak Vol 20, No 1 (2023)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.20.1.8-15.2023

Since the admission of batik as a world cultural heritage by the United Nations Educational, Scientific and Cultural Organization, the public interest in batik and the batik industry has been increasing. However, the problem arises when the development of the batik industry is not accompanied by batik wastewater treatment that fits the wastewater quality standard. Hence it causes environmental pollution, especially for the aquatic body. This paper discusses the conditions and awareness for batik wastewater treatment in the batik industry on household and small-to-medium scales in Plered District, Cirebon, Indonesia. It examines the pollutant load of batik wastewater in the area, the respondent's knowledge about wastewater processing systems, wastewater impact on the environment, and the need for education about batik wastewater treatment plants (WWTPs). The examination of wastewater samples showed that batik wastewater did not meet the waste quality standards and potentially harmed the environment. The respondents generally use synthetic dyes, and were unaware of its impact on the surrounding environment. Keyword: batik, WWTPs, batik production process, dye, wastewater impact ABSTRAK Sejak ditetapkannya batik sebagai warisan budaya dunia oleh United Nations Educational, Scientific and Cultural Organization, minat masyarakat terhadap batik dan industri batik semakin meningkat. Namun permasalahan muncul ketika pengembangan industri batik tidak dibarengi dengan pengolahan air limbah batik yang sesuai dengan baku mutu air limbah. Oleh karena itu menyebabkan pencemaran lingkungan, terutama untuk badan air. Tulisan ini membahas tentang kondisi dan kesadaran pengolahan air limbah batik pada industri batik skala rumah tangga dan kecil-menengah di Kecamatan Plered, Cirebon, Indonesia. Kajian ini mengkaji beban polutan air limbah batik di wilayah tersebut, pengetahuan responden tentang sistem pengolahan air limbah, dampak air limbah terhadap lingkungan, dan perlunya penyuluhan tentang Instalasi Pengolahan Air Limbah (IPAL) batik. Pemeriksaan sampel air limbah menunjukkan bahwa air limbah batik tidak memenuhi baku mutu limbah dan berpotensi merusak lingkungan. Responden umumnya menggunakan pewarna sintetis, dan tidak mengetahui dampaknya terhadap lingkungan sekitar. Kata kunci: COD, elektrokoagulasi, elektroda aluminium, air limbah tahu, monopolar.

ADDITION OF RICE HUSK NANOCELLULOSE TO THE IMPACT STRENGTH OF RESIN BASE HEAT CURED Hasran, Muhammad Aditya Ramadhan; Imam, Dian Noviyanti Agus; Sunendar, Bambang
Journal of Vocational Health Studies Vol. 4 No. 3 (2021): March 2021 | JOURNAL OF VOCATIONAL HEALTH STUDIES
Publisher : Faculty of Vocational Studies, Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jvhs.V4.I3.2021.119-124

Background: One of the materials for denture bases is heat-cured acrylic resin (PMMA). This material still lacks impact strength as a mechanical strength property. The addition of reinforcing material is known to increase the mechanical strength of PMMA. One of the reinforcing materials added to PMMA is nano cellulose from rice husks, one of the wastes from agricultural products. Purpose: This study aims to determine rice husk nano cellulose's addition to the PMMA denture base's impact strength. Method: The research sample consisted of six groups, each group consisting of 8 samples selected by simple random. The PI, P2, P3, P4, P5, and K groups were PMMA with 1%, 2%, 3%, 4%, 5% nano cellulose, and without nano cellulose. Result: Mean impact strength test results were 41.50 x 10-3 ± 3.891 J / mm2 for P1, 44.13 x 10-3 ± 3,980 J / mm2 for P2, 45.63 x 10-3 ± 4,438 J / mm2 for P3, 46.87 x 10-3 ± 4,824 J / mm2 for P4, 49.12 x 10-3 ± 4.016 J / mm2 for P5 and 36.25 x 10-3 ± 1.982 J / mm2 for K. One way Anova test results with p-value of 0.000 indicates differences in the six groups (p<0.05). Conclusion: This study concludes that the impact strength value of PMMA with the addition of rice husk nano cellulose has increased compared to the control group without the addition of rice husk nano cellulose.

Co-Authors AA Sudharmawan, AA Abdul Halim Daulay Ahmad Nuruddin Ahmad Nuruddin Ahmad Nuruddin, Ahmad Aminuddin Debataraja Andrie Harmaji Andrie Harmaji Andrie Harmaji Angela Evelyna Angela Evelyna Angela Evelyna Angela Evelyna Angela Evelyna Angga Hudaya Anggreani, Triannisa Julia Dian Arie Wibowo Asri, Lia Asri, Lia Amelia Tresna Wulan Aulia Nur Ariswari Bambang Pontjo Priosoeryanto Bethy Suryawathy Hernowo Bharata Dewanto Brian Yuliarto Catur Aditya Ramadhany Chriswan Sungkono Cindy Chakornnipit Fadly Claudia Claudia Dahlia Sutanto Denny Nurdin Dian Noviyanti Agus Imam Dicky Juniata Dwi Suprana Didit Nur Rahman Diyah, Nazuwatussya’ Dwifulqi, Hernindya Eka Mulya Alamsyah Ekawati, Estiyanti Elfi Yulia Elsy Rahimi Chaldun Eneng Maryani Enggar Dwi Kusuma Eva Febrina Evelyna, Angela Evi Oktavia Fanni Kusuma Djati Frank Edwin Frank Edwin - Frank Edwin, Frank Gantini Subrata, Gantini Gema Gempita Gina Mayang Lestari Haimir, Alexander Syahlendra Hakim, Muhammad Lukman Nur Hakim, Muhammad Lukman Nur Hangga Guna Dharma Hapsari Milla Haris Budi Widodo Haris, Luqman Harmaji, Andrie Hasran, Muhammad Aditya Ramadhan Hendra Hermawan Heri Setiawan Hermawan, Hendra Hernawan . Hernawan ., Hernawan Irwan Taufik Hermawan Iswandi Imran Ivindra Pane Khairani, Raisa Kiky Viviani Kosterman Usri Leanddas Nurdiwijayanto Leanddas Nurdiwijayanto Leanddas NurdiWijayanto, Leanddas Lia A.T.W. Asri Lia Asri Lia Asri Lia Asri Lia Asri Luqman Haris Martinus Simatupang Maryani, Eneng Maya Komalasari Maya Komalasari Maya Komalasari Maya Komalasari, Maya Mery Agustina Mery Agustina, Mery Mieke Hemiawati Satari Mirantini Aprilisna Muhamad Nasir Muhammad Ilham Bayquni Muhammad Ilham Bayquni Nalaria Prakusya Niki Prastomo - Nina Djustiana Nugraha Nugraha Nugraha, Ashari Budi Nuruddin, Ahmad Oqy Diadara Putri Partogi H. Simatupang, Partogi H. Raisa Khairani Rakhmawati, Widya Ramdan, Raden Dadan Ramos Samuel Gultom Ratih Resti Astari Ratuannisa, Tyar Riesca Ayu Kusuma Wardhani Rifki Septawendar Rifki Septawendar Rifki Septawendar Rifki Septawendar Riyadi, Wisnu Rizka Amalina Robeth Viktoria Manurung Roland P.H. - Rosida Manurung, Rosida Rudy Octavius Sihombing Ryana Budi Purnama Septawendar, Rifki Setiawan, Heri Siagian, Rivita Subrata Gantini Suhanda , Suhanda . Suhanda ., Suhanda Susanti Nurfadhila Susanto Sigit Rahardi Susanto Sigit Rahardi Susanto Sigit Rahardi Sutrisno Sutrisno Suyatman Suyatman Tansza Setiana Putri Tati Suryati Syamsudin Taufan Hidayat Teuku Fawzul Akbar Teuku Fawzul Akbardan Triannisa Julia Dian Anggreani Weko Abhinimpuno - Yanwar Faza Yanwar Faza Zulia Hasratiningsih Zulia Hasratiningsih, Zulia

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