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Fabrication Support Membrane Ceramics Kaolin Alumina For Microfiltration Ria Julyana Manulang; Dede Taufik; Karlina Noordiningsih; Hernawan Hernawan
Jurnal Keramik dan Gelas Indonesia Vol 28, No 2 (2019): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v28i2.5774

Fabrikasi penyangga membran lorong jamak dengan bahan alumina dan kaolin menggunakan metode ektrusi untuk proses mikrofiltrasi telah dilakukan. Potensi penggunaan membran di berbagai aspek industri mendorong dilakukannya penelitian ini mengingat belum adanya industri membran dalam negeri. Penggunaan bahan utama alumina dan kaolin denga menambahkan bahan imbuhan seperti CMC, Metosel, corn starch dan aquadest untuk menghasilkan massa keramik plastis. Pengujian keplastisan dilakukan sebagai petunjuk awal dilakukannya proses ektrusi. Faktor yang menetukan keberhasilan penyangga membran telah dapat diidentifikasi dan diselesaikan yaitu faktor geometri pada sepanjang cetakan, diameter cetakan pada bagian pembentukan suport minimal sama. Diameter pori yang dibentuk oleh pembentuk pori bergantung pada diameter dari poreformer. Starch yang digunakan sebagai pembentuk pori pada percobaan ini menghasilkan diameter pori dengan rata-rata 10 mikron

Synthesis and Characterization of Cetyl Piridinium Chloride Modified and Al2O3 Pillared Clay ferry arifiadi; Irna Rosmayanti; Herlina Damayanti; Hernawan Hernawan; Kristanto Wahyudi
Jurnal Keramik dan Gelas Indonesia Vol 29, No 2 (2020): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v29i2.6673

Bentonite is a mineral that is very abundant in Indonesia and has the potential to be developed, one of which is by adding intercalant to obtain a modified bentonite with the desired characteristics. In this study, the synthesis was carried out by the intercalation method by surfactant Cetyl pyridinium Chloride (CPC) with % weight variations and then followed by pillarization with aluminum polyoxo. Then the resulting solid phase is calcined at a temperature of 450oC. The results obtained were that bentonite with modified CPC and aluminum polyoxo had higher basal distance and surface area characteristics compared to natural bentonite and this increase was also proportional to the amount of CPC added before the pillarization process. The best modification value in the addition of CPC was 36% by weight with a basal distance of 16,8898 Å and a surface area of 276.478 m2 / g. From this research, it can be concluded that the addition of CPC and aluminum polyoxo to bentonite can increase the basal distance and its surface area. The added CPC concentration also has an effect on increasing the number of pillar cations that enter the bentonite so that the pillarization that occurs in bentonite is more and causes the characteristics of the bentonite to be better.

Modification of Silica as a Sealing Rubber Filler with Coupling Agents Hexamethyldisilazane (HDMS) and Methyltriethoxysilane (MTES) Shely Octavania; Eneng Maryani; Hernawan Hernawan; Lintong Sopandi Hutahaean; Untung Prayudie
Jurnal Keramik dan Gelas Indonesia Vol 30, No 2 (2021): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v30i2.7407

Materials that can be used in the manufacture of LPG cylinder sealant rubber is silica. However, easily agglomerates so it is not compatible with rubber. Therefore, the silica surface must be modified to reduce agglomeration and improve compatibility with rubber. This study aims to determine the effect of silica modification on the characteristics of LPG cylinder sealing rubber produced. Silica modification is carried out using 2 (two) types of coupling agents, namely HMDS and MTES with and without Si-69. Preparation of rubber compound with SIR 20 raw material is carried out using an open mill tool with a modified silica filler dose of 40 phr. The characteristics of rubber tested were compound maturity test using a Rheometer and tensile strength and elongation at break using a Universal Testing Machine. The test results show that silica modification can accelerate the maturation time of the compound and increase the tensile strength and elongation at break. The maturation time of the rubber compound with silica filler modified by MTES and HMDS was 7 minutes 36 seconds and 7 minutes 53 seconds. The resulting tensile strength and elongation values are 18.8 MPa and 720% (MTES) and 19.0 MPa and 770% (HMDS). The use of MTES and Si-69 as coupling agent for silica produced rubber with tensile strength and elongation at break of 15.9 MPa and 660%.

GEL CASTING METHOD FOR COMPLEX-SHAPED DENSE CERAMIC FABRICATION Ike Setyorini; Ria Julyana Manullang; Karlina Noordiningsih; Hernawan Hernawan
Jurnal Keramik dan Gelas Indonesia Vol 28, No 1 (2019): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

The fabrication of complex-shaped dense ceramic has been done by gel casting method. Alumina was used as raw material in this study. Alumina was mixed with methacrylamide (MAM) dispersant and Methylenebisacrylamide (MBAM) monomer with a certain ratio until the suspension has a good ability to flow. Ammonium persulphate (APS) as an initiator and Tetra-methylethylene diamine (TEMED) as catalyst were added to accelerate the polymerization reaction. The suspension was then poured into wax mold, stayed until harden and burned at 1300 oC. The results showed the minimum viscosity of suspension is obtained with 80% alumina content and addition of dispersant at 0.15% weight of alumina. The addition of APS and TEMED at 0.2% weight of monomer solution and the addition of PEG at 1 µl per gram alumina provided the best mechanical strength of green body at 61.29 kg/cm2 . Addition of PEG was used to overcome the problem of lamination due to oxidation reactions by air

Sintesis Precipitated Calcium Carbonated Dengan Asam Stearat Sebagai Pengubah Permukaan Citra Fitriani K; Dede Taufik; Kristanto Wahyudi; Hernawan Hernawan
Jurnal Keramik dan Gelas Indonesia Vol 26, No 2 (2017): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Jumlah permintaan material PCC yang mencapai 108,5 jutan ton pada tahun 2016 dan akan terus meningkat pada tahun-tahun berikutnya. Hampir semua industri membutuhkan material PCC baik sebagai filler maupun material utama seperti kertas, tekstil, karet, cat, ban, bahan adesif, farmasi, kosmetik, sealant, keramik, pasta gigi, makanan, plastik, deterjen, perekam magnetik, sistem transport obat-obatan dan sebagainya. oleh karena itu penelitian ini dilakukan untuk memanfaatkan sumber daya kapur alam Indonesia. Penelitian sintesis PCC ini menggunakan bahan baku dari Padalarang. Proses pembuatan PCC dilakukan dengan metoda karbonasi dan asam stearate sebagai pengubah. Hasil penelitian menunjukkan persen CaCO3 meningkat seiring dengan penambahan asam stearat dengan persen teritinggi 99,387 %. dalam bubur menentukan ukuran butir kapur yang dapat dicapai. Selain itu derajat putih (whiteness) dan derajat kecerahan (brightness) meningkat secara signifikan seiring dengan penambahan asam stearat, nilai yang tertinggi adalah whiteness 84,61 dan brightness 90,93 dengan konsentrasi asam stearat 2,5%.

Sintesis dan Karakterisasi Lempung Terinterkalasi dengan Menggunakan Cetyl Pridinium Chloride Hernawan Hernawan; Nurhidayati Nurhidayati
Jurnal Keramik dan Gelas Indonesia Vol 25, No 2 (2016): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

CPC merupakan garam organik yang terdiri kation kuartener dari amonium dan anion khlor. CPC dapat digunakan untuk memperlebar jarak basal/interkalasi dari montmorillonit. Fenomena pelebaran ini akan dibahas dalam artikel ini.

Synthesis of -TCP by Wet Precipitation Method from Natural Lime Ayu Ratnasari; Naili Sofiyaningsih; Muhammad Syaifun Nizar; Hernawan Hernawan
Jurnal Keramik dan Gelas Indonesia Vol 29, No 2 (2020): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v29i2.6711

Beta-tricalcium phosphate (β-TCP) is a biomaterial that is widely used as bone scaffold and calcium phosphate cement. β-TCP has excellent characteristic such as biocompatible, highly solubility, and faster degradation rate than other types of calcium phosphate. In this research, β-TCP was synthesized from natural limestone and phosphoric acid. The synthesis method used is wet precipitation method. Phosporic acid solution was added by titration at rate of 0,5 mL per second. Temperature reaction controlled at 60⁰C meanwhile calcination process at 800⁰C and 1000⁰C. The mineralogy characteristic by X-Ray Diffractometer (XRD) showed that β-tricalcium phosphate main phase was formed at 800⁰C and while characterization of chemical content with X-Ray Flourescence (XRF) β-TCP has a Ca/P molar ratio of 1,35-1,37.

Fabrication Support Membrane Ceramics Kaolin Alumina For Microfiltration Ria Julyana Manulang; Dede Taufik; Karlina Noordiningsih; Hernawan Hernawan
Jurnal Keramik dan Gelas Indonesia Vol 28, No 2 (2019): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v28i2.5774

Fabrikasi penyangga membran lorong jamak dengan bahan alumina dan kaolin menggunakan metode ektrusi untuk proses mikrofiltrasi telah dilakukan. Potensi penggunaan membran di berbagai aspek industri mendorong dilakukannya penelitian ini mengingat belum adanya industri membran dalam negeri. Penggunaan bahan utama alumina dan kaolin denga menambahkan bahan imbuhan seperti CMC, Metosel, corn starch dan aquadest untuk menghasilkan massa keramik plastis. Pengujian keplastisan dilakukan sebagai petunjuk awal dilakukannya proses ektrusi. Faktor yang menetukan keberhasilan penyangga membran telah dapat diidentifikasi dan diselesaikan yaitu faktor geometri pada sepanjang cetakan, diameter cetakan pada bagian pembentukan suport minimal sama. Diameter pori yang dibentuk oleh pembentuk pori bergantung pada diameter dari poreformer. Starch yang digunakan sebagai pembentuk pori pada percobaan ini menghasilkan diameter pori dengan rata-rata 10 mikron

Synthesis and Characterization of Cetyl Piridinium Chloride Modified and Al2O3 Pillared Clay ferry arifiadi; Irna Rosmayanti; Herlina Damayanti; Hernawan Hernawan; Kristanto Wahyudi
Jurnal Keramik dan Gelas Indonesia Vol 29, No 2 (2020): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v29i2.6673

Bentonite is a mineral that is very abundant in Indonesia and has the potential to be developed, one of which is by adding intercalant to obtain a modified bentonite with the desired characteristics. In this study, the synthesis was carried out by the intercalation method by surfactant Cetyl pyridinium Chloride (CPC) with % weight variations and then followed by pillarization with aluminum polyoxo. Then the resulting solid phase is calcined at a temperature of 450oC. The results obtained were that bentonite with modified CPC and aluminum polyoxo had higher basal distance and surface area characteristics compared to natural bentonite and this increase was also proportional to the amount of CPC added before the pillarization process. The best modification value in the addition of CPC was 36% by weight with a basal distance of 16,8898 Å and a surface area of 276.478 m2 / g. From this research, it can be concluded that the addition of CPC and aluminum polyoxo to bentonite can increase the basal distance and its surface area. The added CPC concentration also has an effect on increasing the number of pillar cations that enter the bentonite so that the pillarization that occurs in bentonite is more and causes the characteristics of the bentonite to be better.

Modification of Silica as a Sealing Rubber Filler with Coupling Agents Hexamethyldisilazane (HDMS) and Methyltriethoxysilane (MTES) Shely Octavania; Eneng Maryani; Hernawan Hernawan; Lintong Sopandi Hutahaean; Untung Prayudie
Jurnal Keramik dan Gelas Indonesia Vol 30, No 2 (2021): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v30i2.7407

Materials that can be used in the manufacture of LPG cylinder sealant rubber is silica. However, easily agglomerates so it is not compatible with rubber. Therefore, the silica surface must be modified to reduce agglomeration and improve compatibility with rubber. This study aims to determine the effect of silica modification on the characteristics of LPG cylinder sealing rubber produced. Silica modification is carried out using 2 (two) types of coupling agents, namely HMDS and MTES with and without Si-69. Preparation of rubber compound with SIR 20 raw material is carried out using an open mill tool with a modified silica filler dose of 40 phr. The characteristics of rubber tested were compound maturity test using a Rheometer and tensile strength and elongation at break using a Universal Testing Machine. The test results show that silica modification can accelerate the maturation time of the compound and increase the tensile strength and elongation at break. The maturation time of the rubber compound with silica filler modified by MTES and HMDS was 7 minutes 36 seconds and 7 minutes 53 seconds. The resulting tensile strength and elongation values are 18.8 MPa and 720% (MTES) and 19.0 MPa and 770% (HMDS). The use of MTES and Si-69 as coupling agent for silica produced rubber with tensile strength and elongation at break of 15.9 MPa and 660%.

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