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SINTESIS NANO KRISTALIN KOMPOSIT ALUMINA-ZIRKONIA DENGAN TEMPLATE PULP ORYZA SATIVA MELALUI METODE KALSINASI PREKURSOR Edwin, Frank; Purwasasmita, Bambang Sunendar; ., Suhanda; Septawendar, Rifki; NurdiWijayanto, Leanddas
Jurnal Riset Industri Vol 5, No 1 (2011): Industri Kecil Menengah
Publisher : Badan Penelitian dan Pengembangan Industri

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Nano kristalin komposit alumina-zirkonia disintesis melalui metode kalsinasi prekursor dengan pulp oryza sativasebagai template serta Al(NO3)3.9H2O dan ZrCl4 sebagai prekursor dengan komposisi molar 80:20. Pencampuranprekursor, pelarut, dan pulp menggunakan ultra turrax T25 pada RPM 15000 selama 3 menit sebanyak 3 kali.Kalsinasi yang ditujukan untuk memperbaiki morfologi dan pembentukan fasa dilakukan pada temperatur 900,1000, 1100, 1200, dan 1250Â°C. Untuk mengetahui sifat-sifat dari material komposit yang terbentuk, dilakukankarakterisasi X-Ray Diffraction (XRD) dan Scanning Electron Microscope (SEM). Dari hasil XRD, dapatdiidentifikasi fasa dari komposit yang muncul, yaitu tetragonal-zirkonia, monoklinik-zirkonia, dan Î´-alumina. Fasatunggal tetragonal-zirkonia muncul pada sampel yang dikalsinasi pada temperatur 900-1100Â°C, sementarasampel yang dikalsinasi pada temperatur yang lebih tinggi menghasilkan fasa campuran antara tetragonalzirkoniadan monoklinik-zirkonia. Dari hasil SEM, terlihat bahwa morfologi partikel memiliki bentuk menyerupaibentuk dari pulp, yang mana bentuk ini merupakan akibat dari pencampuran dengan kecepatan tinggi.Kata kunci: Komposit, Alumina-Zirkonia, Tetragonal-Zirkonia, Monoklinik-Zirkonia, Pulp.

SYNTHESIS MATERIAL OF ZEOLITE NANOPOROUS (ZSM-5) FROM COAL FLY ASH Purwasasmita, Bambang Sunendar; Kurnia, Agung; Wibowo, Arie
Jurnal Zeolit Indonesia Vol 9, No 1 (2010)
Publisher : Jurnal Zeolit Indonesia

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Coal fly ash (CFA) is the waste of coal usage that requires serious attention on handling because it is have the large quantity and containing a dangerous substances for environmental. The interesting method of waste processing of CFA is using CFA as zeolite raw material because CFA have a rich silicate and alumina. In this study, CFA is used as a raw material for zeolite synthesis nanoporous (ZSM-5) so that expected could be a solution for waste processing of CFA and also could be deliver a valuable materials that needed on many applications. Based on the result of characterization XRD and SEM, was known that structure of ZSM-5 and other zeolites (Na12Al12Si12O48.27H2O and Na0,3Al2,564Si100O203,996) have been successfully synthesized on hydrothermal processing at temperature of 97Â°C and the pressure of 1,3 bar.

Synthesis of mesh-shaped calcia partially stabilized zirconia using eggshell membrane template as filler composite Gempita, Gema; Hasratiningsih, Zulia; Subrata, Gantini; Purwasasmita, Bambang Sunendar
Padjadjaran Journal of Dentistry Vol 29, No 2 (2017): July
Publisher : Faculty of Dentistry Universitas Padjadjaran, Indonesia

Introduction: This experiment was conducted experimentally to synthesize Calcia Partially Stabilized Zirconia (Ca-PSZ) by sol-gel method using eggshell membrane template as a composite filler. The eggshell membrane was used to produce a mesh shaped structure, which hopefully can improve the mechanical properties of the composite. Method: Ca-PSZ filler was synthesized from ZrOCl2 precursor and Ca(NO3)2 stabilizer with a 24 hours immersion time. Ca-PSZ of synthesis then mixed with the resin matrix to test its composite hardness. Result: The EDS characterization results suggested that the sample contained elements of zirconia, calcium, and oxygen. Whereas, the XRD characterization identified that crystal structures that formed in the sample were nano scale tetragonal. Characterization of SEM showed Ca-PSZ with mesh structured. The average composite hardness value was 15.79 VHN. Conclusion: The composites with Ca-PSZ-synthesized filler could be prepared and its hardness value was higher than the composite with Ca-PSZ filler in spherical particles, but the hardness was still below the composite on the market.

Effect of chitosan as a coupling agent and types of stabiliser of zirconia filler on nanocomposite hardness Putri, Tansza Permata Setiana; Manurung, Rosida; Usri, Kosterman; Purwasasmita, Bambang Sunendar
Padjadjaran Journal of Dentistry Vol 30, No 1 (2018): March
Publisher : Faculty of Dentistry Universitas Padjadjaran, Indonesia

Introduction: Nanocomposite has been developed as a dental restoration. Nano-scale filler can result in high mechanical properties and good esthetic. Nanofiller materials such as partially stabilised zirconia (PSZ) has been recommended for dental use. This form of zirconia can be stabilised by the addition of several different oxides such as magnesia and calcia. Chitosan as a coupling agent was able to increase the nanocompositeâs mechanical properties. The purpose of this research was to evaluate the nanocompositeâs hardness value with and without the addition of chitosan as a coupling agent as well as a different stabiliser of zirconia filler. Methods: Procedures of this research consisted of several stages which were the fabrication of nanocomposite and mechanical properties measurement using the Vickerâs hardness testing. Results: The nanocompositeâs hardness value (kg/mm2) with zirconia filler stabilised by MgO without the addition of chitosan was as much as 5.09 and with the addition of chitosan was 7.51; the nanocomposite âs hardness number with zirconia filler stabilised by Â CaO without the addition of chitosan was 8.16 and with the addition of chitosan was 13.13. Â The results were then analysed statistically using the Analysis of Variance (ANOVA) test and showed a significant difference between all of those data groups. Conclusion: The addition of chitosan as well as different stabiliser (MgO and CaO)Â of Zirconia filler had affected the nanocomposite âs hardness value.

Pengaruh Morfologi Serbuk Silika Nanopartikel Terhadap Efektivitas Poles Pewarnaan Gigi Siagian, Rivita; Evelyna, Angela; Purwasasmita, Bambang Sunendar
Jurnal Material Kedokteran Gigi Vol 3 No 2 (2014): JMKG Vol 3 No 2 September 2014
Publisher : Ikatan Peminat Ilmu Material dan Alat Kedokteran Gigi (IPAMAGI)

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Silica is a product which is produced from hydrated silica available in a variety of particle sizes and characteristics. Silica is easy to find and mechanically used as stain remover. Large size of silica particles can cause deep scratches on the teeth and restaining can occurred so that nanoscale be used. The aim of this research to determine the result test from synthesis silica nanoscale with morphology nanosphere and nanorod and differences effectiveness of abrasion with different morphology. This research was an experimental study with 27 sample divided into three groups. The first group were polished with silica nanosphere, the second group with silica nanorod and the third group with a mixture of both silica. Tooth samples was captured then flowed by a solution of coffee during 2 months until the color changes and last taken picture of it. The tooth staining was polished with three body wear process with three abrasive particles from three groups was applied use to rubber cup and low speed handpiece then analyzed using software image J. The data were statistically analyzed using ANAVA test with p<0,05 and continued with unpaired t-test. Research conclude that the result test of synthesis nanoparticle silica obtained morphology nanosphere and nanorod and there are also differences effectiveness abrasion of silica with different morphology.

Penambahan Nanoselulosa Sekam Padi (Oryza Sativa L) Terhadap Kekuatan Fleksural Basis Gigitiruan Resin Akrilik Polimerisasi Panas Riyadi, Wisnu; Purwasasmita, Bambang Sunendar; Imam, Dian Noviyanti Agus
E-Prodenta Journal of Dentistry Vol 4, No 2 (2020)
Publisher : Fakultas Kedokteran Gigi UB

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Latar Belakang : Basis gigitiruan berfungsi untuk tempat anasir gigi dan sebagai pengganti tulang alveolar yang hilang. Resin akrilik polimerisasi panas merupakan bahan basis gigitiruan yang sering digunakan. Penambahan bahan alam pada bahan resin digunakan untuk memperbaiki kekuatan fleksuralnya, seperti nanoselulosa sekam padi. Tujuan : untuk mengetahui kekuatan fleksural dan karakteristik morfologi permukaan dari basis gigitiruan resin akrilik polimerisasi panas yang ditambahkan nanoselulosa sekam padi (Oryza sativa L). Metode : Penelitian eksperimental laboratoris murni dengan post test only control group design. Sampel terdiri dari empat puluh delapan sampel yang dibagi 6 kelompok, yaitu resin akrilik polimerisasi panas yang ditambahkan nanoselulosa 1%, 2%, 3%, 4%, 5%, dan resin akrilik polimerisasi panas tanpa penambahan nanoselulosa. Uji kekuatan fleksural dilakukan menggunakan metode three point bending dan pengamatan karakteristik permukaan dilakukan menggunakan SEM. Hasil : Kelompok resin akrilik dengan penambahan nanoselulosa 5% memiliki kekuatan fleksural tertinggi (79,62 MPa), sedangkan kelompok resin akrilik tanpa penambahan nanoselulosa memiliki kekuaran fleksural terendah (60,55 MPa). Terdapat perbedaan bermakna hasil uji kekuatan fleksural masing-masing kelompok perlakuan dan kontrol (p<0,05). Hasil uji SEM pada setiap kelompok sudah menunjukkan gambaran yang homogen namun masih memiliki sedikit aglomerasi dan porositas. Kesimpulan : nanoselulosa sekam padi dapat meningkatkan kekuatan fleksural basis gigitiruan resin akrilik polimerisasi panas.Â Â Katakunci : Nanoselulosa, kekuatan fleksural, gigituran, resin akrilik polimerisasi panas, sekam padi.

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.

Effect of chitosan as a coupling agent and types of stabiliser of zirconia filler on nanocomposite hardness Putri, Tansza Permata Setiana; Manurung, Rosida; Usri, Kosterman; Purwasasmita, Bambang Sunendar
Padjadjaran Journal of Dentistry Vol 30, No 1 (2018): March 2018
Publisher : Universitas Padjadjaran

Introduction: Nanocomposite has been developed as a dental restoration. Nano-scale filler can result in high mechanical properties and good esthetic. Nanofiller materials such as partially stabilised zirconia (PSZ) has been recommended for dental use. This form of zirconia can be stabilised by the addition of several different oxides such as magnesia and calcia. Chitosan as a coupling agent was able to increase the nanocomposite’s mechanical properties. The purpose of this research was to evaluate the nanocomposite’s hardness value with and without the addition of chitosan as a coupling agent as well as a different stabiliser of zirconia filler. Methods: Procedures of this research consisted of several stages which were the fabrication of nanocomposite and mechanical properties measurement using the Vicker’s hardness testing. Results: The nanocomposite’s hardness value (kg/mm2) with zirconia filler stabilised by MgO without the addition of chitosan was as much as 5.09 and with the addition of chitosan was 7.51; the nanocomposite ’s hardness number with zirconia filler stabilised by CaO without the addition of chitosan was 8.16 and with the addition of chitosan was 13.13. The results were then analysed statistically using the Analysis of Variance (ANOVA) test and showed a significant difference between all of those data groups. Conclusion: The addition of chitosan as well as different stabiliser (MgO and CaO) of Zirconia filler had affected the nanocomposite ’s hardness value.

Synthesis of mesh-shaped calcia partially stabilized zirconia using eggshell membrane template as filler composite Gempita, Gema; Hasratiningsih, Zulia; Subrata, Gantini; Purwasasmita, Bambang Sunendar
Padjadjaran Journal of Dentistry Vol 29, No 2 (2017): July 2017
Publisher : Faculty of Dentistry Universitas Padjadjaran

Introduction: This experiment was conducted experimentally to synthesize Calcia Partially Stabilized Zirconia (Ca-PSZ) by sol-gel method using eggshell membrane template as a composite filler. The eggshell membrane was used to produce a mesh shaped structure, which hopefully can improve the mechanical properties of the composite. Method: Ca-PSZ filler was synthesized from ZrOCl2 precursor and Ca(NO3)2 stabilizer with a 24 hours immersion time. Ca-PSZ of synthesis then mixed with the resin matrix to test its composite hardness. Result: The EDS characterization results suggested that the sample contained elements of zirconia, calcium, and oxygen. Whereas, the XRD characterization identified that crystal structures that formed in the sample were nano scale tetragonal. Characterization of SEM showed Ca-PSZ with mesh structured. The average composite hardness value was 15.79 VHN. Conclusion: The composites with Ca-PSZ-synthesized filler could be prepared and its hardness value was higher than the composite with Ca-PSZ filler in spherical particles, but the hardness was still below the composite on the market.

In vivo histomorphological evaluation of geopolymer-carbonated apatite nanocomposites implanted on rabbit tibia at early bone healing Sutanto, Dahlia; Satari, Mieke Hemiawati; Hernowo, Bethy Suryawathy; Priosoeryanto, Bambang Pontjo; Septawendar, Rifki; Asri, Lia Amelia Tresna Wulan; Purwasasmita, Bambang Sunendar
Padjadjaran Journal of Dentistry Vol 33, No 1 (2021): March 2021
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/pjd.vol33no1.28899

Introduction: Dental implants have become a more desirable treatment for replacing missing teeth. The mechanical properties and biocompatibility of titanium and zirconia are excellent, but they are less bioactive. The chemical composition of the carbonate apatite is similar to enamel and dentin. Geopolymers are inorganic polymers, and they are similar to ceramics. They have excellent mechanical properties, bioactivity, biocompatibility. The purpose of this study was to assess histomorphological evaluation of geopolymer-carbonated apatite nanocomposites implanted on rabbit tibia at early bone healing in vivo. Methods: Geopolymer-CHA nanocomposites with a diameter of 3 mm and length of 6 mm was placed in the tibia of eight male New Zealand White rabbit whose body weight is 3 to 3.5 kg and six-month ages. Experimental subjects were randomly assigned to 2 groups for assessing the bone healing capability around samples to 14 and 28 days histomorphologically. Wilcoxon test was performed, and p<0.05 was considered significant, using Minitab software version 13. Results: Granulation tissue, woven, and lamellar bone was analysed. A reactive bone formation was revealed in the 14th day. Osteoblasts, osteoids, and osteocytes showed more mature and woven bone became denser on the 28th day. Conclusion: Geopolymer-CHA nanocomposites could be considered a candidate for dental implant material from this histomorphological evaluation.

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