Bahruddin Bahruddin
Jurusan Teknik Kimia Fakultas Teknik Universitas Riau Kampus Bina Widya Simpang Baru Panam Pekanbaru 28312

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MORFOLOGI DAN PROPERTI CAMPURAN KARET ALAM/POLYPROPYLENE YANG DIVULKANISASI DINAMIK DALAM INTERNAL MIXER Bahruddin, Bahruddin; Sumarno, Sumarno; Wibowo, Gede; Suwarno, Nonot
REAKTOR Volume 11, Nomor 2, Desember 2007
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.11.2.71-77

Abstract

Morfologi dan properti campuran (blend) karet alam jenis SIR-20/polypropylene (NR/PP) yang divulkanisasi dinamik dalam internal mixer telah dipelajari. Blend dibuat dengan rasio berat NR/PP 10/90, 20/80, 50/50, 60/40 dan 70/30 dan komposisi sulfur 3 dan 5 phr (per hundred rubber). Proses pencampuran dilakukan pada suhu 180 oC dan kecepatan rotor 60 rpm. Analisa morfologi menggunakan SEM (Scanning Electron Microscope) dan DSC (Differential Scanning Calorimetry). Properti mekanik yang diukur meliputi tensile strength, elongation at break, izod impact, tearing dan hardness, berdasarkan standar ASTM. Didapatkan bahwa peningkatan rasio NR/PP menghasilkan distribusi partikel NR yang makin merata dengan ukuran yang makin kecil. Morfologi blend menunjukkan sistem dua fasa dan vulkanisasi fasa NR terjadi secara parsial dalam matrik PP. Peningkatan rasio NR/PP dan komposisi sulfur dapat meningkatkan properti elongation at break, namun menurunkan properti tensile strength, izod impact, tearing dan hardness. Elongation at break tertinggi yang dapat diperoleh adalah 70% pada rasio blend NR/PP 70/30 dan komposisi sulfur 5 phr.
تطبيق اللعب اللغوي بطاقة الصدر في تعليم اللغة العربية لترقية مهارة الكتابة Umar, Umar; Bahruddin, Bahruddin
Arabia Vol 10, No 1 (2018): JURNAL ARABIA
Publisher : Program Studi Pendidikan Bahasa Arab Jurusan Tarbiyah STAIN Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21043/arabia.v10i1.3594

Abstract

لا يريد الباحث من هذا البحث إلا الهدفين الاثنين: أولهما، لمعرفة تطبيق وسيلة اللعب اللغوي بطاقة الصدر فى تعليم اللغة العربية لترقية مهارة الكتابة؛ وثانهما، لمعرفة فعّالية استخدام وسيلة اللعب اللغوي بطاقة الصدر فى تعليم اللغة العربية لترقية مهارة الكتابة فى الفصل الثامن بالمدرسة مزرعة الهدى الإسلامية المتوسطة كارانج أيار دماك.  ومن ثم، كان نوع هذا البحث تجريبيا، وأمّا المدخل الذي استخدمه الباين فهو المدخل الكمّي الذي يركز على تحليل ومعالجة البيانات الرقمية مع الأساليب الإحصائية. تجمع الباحثة البيانات فى هذا البحث بطريقة الملاحظة والتوثيق والإختبار. وطريقة تحليل البيانات إختبار الصدق وإختبار الثبات، تحليل الافتراض التقليدي هو إختبار الاستواء وإختبار التجانس.ويجد الباحث نتائج هذا البحث التى سيذكرها ما يلي: أولا، أن تطبيق وسيلة اللعب اللغوي بطاقة الصدر فى تعليم اللغة العربية لترقية مهارة الكتابة المستخدمة موافق بالنظرية والخطوات المقررة؛ ثانيا، أن تطبيق وسيلة اللعب اللغوي بطاقة الصدر لترقية مهارة الكتابة فى الفصل الثامن فعّال. والدليل على ذلك أن النتائج المكتسبة من الطلاب بعد الإختبار اكبر من النتائج المكتسبة قبل الإختبار، وهي بمعدل قبل الإختبار 59،72 وبمعدل بعد الإختبار 71،77 . ودرجة الإختبار من Tالحساب 11،15 اكبر من Tالجدول من المستوى 1% 2،71 و5% 2،02. بذلك فإن فعّالية استخدام وسيلة لوحة فى تعليم اللغة العربية لترقية مهارة الكتابة مقبولة. Tujuan dari penelitian ini adalah : 1) Untuk mengetahui penerapan media Kartu dada dalam pembelajaran bahasa Arab untuk meningkatkan keterampilan menulis, 2) Untuk mengetahui efektifitas penggunaan media kartu dada dalam pembelajaran bahasa Arab untuk meningkatkan keterampilan menulis di kelas 8 MTs Mazo’atul Huda Karanganyar Demak .Jenis penelitian ini adalah penelitian eksperimen dan pendekatannya yaitu pendekatan kuantitatif yang memusatkan pada analisis dan pengujian data angka menggunakan metode statistik (SPSS). Metode pengumpulan data dengan tehnik observasi, dokumentasi, dan tes. Dan metode analisis data yaitu uji validitas dan uji reliabilitas, analisis asumsi klasik yaitu uji normalitas dan uji homogenitas.Hasil yang diperoleh dari penelitian ini 1) penerapan media kartu dada dalam pembelajaran bahasa arab untuk meningkatkan keterampilan menulis sudah sesuai dengan materi dalam buku pembelajaran di sekolah. 2) dan penerapan  kartu dada saku untuk meningkatkan keterampilan menulis di kelas 8 efektif. Dan berdasarkan bukti nilai dari siswa bahwa rata-rata nilai Posttest lebih tinggi dari rata-rata nilai Pretest yaitu rata-rata nilai Pretest 59,72 dan rata-rata nilai Posttest 71,77. Dan dari nilai tes yang dihitung dengan menggunakan rumus Ttest, t˳ mencapai nilai 11,15 yang artinya lebih tinggi dari nilai Ttabel dengan taraf signifikansi 1% 2,71 dan 5% 2,02. Maka efektifitas penggunan media kartu dada dalam pembelajaran Bahasa Arab untuk meningkatkan keterampilan menulis bisa diterima.
Pengaruh Penambahan Graphene Oxide Terhadap Sifat Bioplastik Berbasis Pati Singkong Ekawati, Lestari; Amri, Amun; Bahruddin, Bahruddin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Conventional plastics are still often used today derived from synthetic polymer materials that are difficult to be recycled and degraded by microorganisms. Bioplastic is one of solution to this problem. One of the materials that have the potential to be used as raw material is cassava because it has a high starch content. However, starch has a weakness that is still low mechanical properties. The general purpose of this research is to study the effect of adding graphene oxide and stirring time to mechanical properties, and biodegradation of cassava starch based bioplastic. Bioplastic was synthesized by intercalation method with variation of graphene oxide concentration (5% v / v and 15% v / v) and stirring time variation (30 minute and 60 minute). The results of the analysis showed that the treatment with the addition of filler graphene oxide and the variation of stirring time contributed to the resulting bioplastic mechanical properties. Bioplastic with the best characteristic was obtained by adding 15% graphene oxide and 60 minutes stirring time with tensile strength 3,92 Mpa, elongation 13,216%, modulus young 29,66 Mpa with water resistance 27,42% and within 1 week degraded 50 , 83%.Keywords: Bioplastic, glycerol, graphene oxide, Cassava Starch, plasticizer
Termodinamika Campuran Polipropilen/Karet Alam yang Ditambahkan Kompatibilizer Maleated Polypropylene Bahruddin, Bahruddin; Irdoni, Irdoni; Muhammad, Muhammad
Jurnal Rekayasa Kimia & Lingkungan Vol 10, No 1 (2014): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (436.476 KB) | DOI: 10.23955/rkl.v10i1.2169

Abstract

Kajian terhadap aspek termodinamika suatu sistem campuran polimer-polimer diperlukan untuk mendapatkan informasi mengenai kemampuan pencampuran maksimal dan pemisahan fasa dari sistem campuran tersebut. Penelitian ini bertujuan untuk memperkirakan kemampuan pencampuran sistem karet alam (natural rubber, NR) dan polipropilen (PP) yang ditambahkan kompatibilizer Maleated Polypropylene (MAPP), dimana fasa NR tervulkanisasi dinamik dalam matrik PP dengan cross-link agent sulfur. Estimasi kemampuan pencampuran didasarkan pada energi bebas pencampuran yang dihitung dengan persamaan Flory-Huggins. Entalpi pencampuran dan volume molar masing-masing dihitung dengan persamaan van Krevelen dan metode Group Contribution Volume (GCVol). Parameter kelarutan juga dihitung menggunakan metode van Krevelen. Energi bebas pencampuran dihitung pada komposisi NR antara 0 sampai dengan 100% dan suhu 30oC. Proses vulkanisasi fasa NR dianggap menghasilkan jumlah molekul yang berikatan silang sebanyak 1113 dan terjadi secara monosulfidik. Komposisi MAPP divariasikan antara 0 sampai 10% massa, sedangkan jumlah gugus anhydrate (MA) dalam molekul MAPP berkisar antara 1 sampai 5% mol. Hasil perhitungan menunjukkan bahwa penambahan MAPP pada sistem campuran NR/PP dengan fasa NR tervulkanisasi dinamik hanya dapat menurunkan nilai energi bebas pencampuran, namun tidak mengubah sifat ketidakmampuan campurnya. Kadar MA dalam MAPP relatif tidak mempengaruhi kemampuan pencampuran sistem campuran tersebut.
Pengaruh laju Pembebanan Organik Terhadap Efisiensi Penyisihan COD Limbah Cair Kelapa Sawit Menggunakan Bioeraktor Hibrid Anaerob Dua Tahap Musfa, Nopi Andri; Ahmad, Adrianto; Bahruddin, Bahruddin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The development of palm oil factories in the last few years the rapid growth experienced and gived the impact of positive and negative impact for the community. One of the positive impact is increasing foreign exchange and community welfare state, while the negative impact that is causing waste could reduce the quality of the environment. Characteristic of COD in the liquid waste of plant crude palm is 60.000 mg/l. The value of COD for is a measure of water pollution of organic substances naturally cannot be degradation with microbiologists process and may also result in reduced oxygen dissolved in water. COD handling of liquid waste from factories crude palm oil can be done in anaerobic two stages bioreactor hybrid use anaerobic. This research purposed to determine the effect of organic loading rate for efficiency of COD removal and determine the optimal organic loading rate for efficiency of COD removal on liquid waste oil palm treatment with using anaerobic bioreactor hybrids two stages. Operating conditions on this research that using room temperature, each bioreactor volume by 10 liters and feet flow rate in bioreactor I is 5 liters per day with organic loading rate by 30 kg COD/m3day. The result showed that an COD removal with varying the organic loading rate of 8,568 kgCOD/m3day, 12 kgCOD/m3day and 19,8 kgCOD/m3day, this result obtained the highest efficiency COD removal in the organic loading rate is 8,568 kgCOD/m3day with the equal is 93,06 %. This indicates that bioreactor anaerobic hybrid two stages are relatively better for COD removal from the liquid waste content of crude palm oil.   Keywords: Anaerobic, COD, Liquid Waste of Crude Palm Oil, Two-Stage Anaerobic Bioreactor Hybrid  
Pengaruh Kadar Selulosa Pelepah Sawit Terhadap Sifat Dan Morfologi Wood Plastic Composite (WPC) Halawa, Yusnila; Bahruddin, Bahruddin; Irdoni, Irdoni
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Cellulose is one of components that contained in palm frond fibers. Cellulose is a polymer which has a molecular average weight, polydispersity and has a long chain that is used as supporting material in manufacturing Wood Plastic Composite (WPC). The purpose of this research is to determine the effect of palm midrib cellulose content to the properties and morphology of WPC. WPC samples prepared by the method of melt blending the fibers of palm midrib (SPS), polypropylene (PP), Maleated polypropylene (MAPP), and paraffin for 1 hour at a temperature of 170 ° C and a rotor speed of 80 rpm using the Internal Mixer. The size of the palm frond fibers used are 40 mesh with the composition of the SPS / PP is 50/50 and 30/70. While the ratio comparison MAPP / cellulose is 0%, 2% and 5% and the cellulose of 41.86%, 52.86% and 56.24%. The test includes testing of the mechanical properties are tensile strength and flexural strength, while physical properties include density, moisture content, water absorption and thickness swelling. Test of morphology using a scanning electron microscopy. The test results showed that the best mechanical properties resulting in a ratio SPS / PP 50/50, cellulose MAPP 0% and 56.24%, with a tensile strength of 10.1 MPa and 27.0 MPa flexural strength. While the physical properties testing are the highest density of 1.511 gr/cm3, best absorption at 0.05%, the water content of 0.01% and a thickness swelling of 0.05%.Keywords: maleated polypropylene, morphology, polypropylene, cellulose, wood plastic composite
Pengaruh Konsentrasi Completion Fluid Terhadap Laju Swelling Clay Pada Sumur Produksi Minyak Bumi Riswanda, Bramansyah; Bahruddin, Bahruddin; HS, Irdoni
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

In the process of oil production wells maintenance, sometimes it has to face containing mud (clay) formations and this situation can detain the process of well maintenance and damage downhole equipment, especially pumps because of clay swelling. This study intends to determine the concentration effect of completion fluid to clay swelling and determine the optimum completion fluid concentration In this study, KCl and XCD polymer has been chosen as the inhibiting compound of clay swelling. Concentration used is 2%, 4% and 6% for KCl, 2, 3 and 4 ppm for XCD polymer with a ratio between the solution with the clay is 1:8, 1 9 and 1:10. The temperature used is room temperature of 25° C. The results showed that the rate of swelling occurs most rapidly at 2% KCl ratio of 1:8. The phenomenon of swelling clay to a solution of XCD polymer is very small so it can be considered no swelling that occurs, either in 2, 3 or 4 ppm solution of polymer XCDKeywords: clay, swelling, oil producer well, KCl, XCD polymer
Preparasi Pelepah Sawit Dengan Asam Oksalat Dan Pengaruhnya Terhadap Sifat Dan Morfologi Wood Plastic Composite Parsaulian, Andreas Sahat; Bahruddin, Bahruddin; Helwani, Zuchra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Reduced forest makes the availability of woods as the construction material on the wane. Oil palm frond has a potential to use to decrease utilization of woods directly. The main objective of this study was to evaluate the effect of oxalic acid and thermal pretreatment to morphology and properties of oil palm frond based wood plastic composite (WPC). The temperature of pretreatment were varied at 100oC, 120oC, and 140oC with submersion time 15 minutes. The mass ratio of oil palm frond sized 100 – 200 mesh as filler and polypropylene as a matrix is 30:70. 2% paraffin as plasticizer and 5% maleic anhydride polypropylene as compatibilizer were use as an additive. WPC samples were prepared using internal mixer Labo Plastomill at temperature 180oC and rotor speed 80 rpm. Testing experiments were prepared to mechanical testing consist of tensile and flexural strength and physical testing consist of density, water absorption, and swelling thickness. Scanning Electron Microscopy was used as a morphology testing. The result showed that oxalic acid pretreatment significantly gives an effect to mechanical and physical properties. The best WPC in this study was treated in the 120oC using oxalic acid based on tensile strength with 23.785 MPa, flexural strength 43.2 MPa, density 0.975 gr/cm3, water absorption 1.44%, and swelling thickness 0.17%.Keywords: pretreatment, oil palm frond, wood plastic composite
Pengaruh Temperatur Dan Katalis Lempung Aktif Pada Pengolahan Sampah Plastik Jenis Polypropylene Dengan Metode Pirolisis Shaleh, Idries Hamidi; Daud, Syarfi; Bahruddin, Bahruddin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The increasing amounts of plastic wastes generate enormous environmental problems because its nonbiodegradable properties. Various attempts have been done to reduce plastic waste. One of the way to reuse the plastic waste is converted to the liquid fuel by pyrolisis process. Pyrolysis, while can decomposed plastic safely, its product can be alternative source of fuel. The purpose of this study is to observe the effect of process variable (process temperature and active clay catalyst) for yield form polypropylene plastic and generated pyrolysis liquid fuel characterization. The pyrolysis process was carried out at 300 oC, 350 oC, 400 oC and variation of active clay catalyst to 0.5%, 1%, 1.5% and non-catalyst for polypropylene plastic and with reaction time of 120 min. The results of this study resulted in the highest yield of 65.86% at 400oC and 1.5% active clay catalyst. Characterization of pyrolysis liquid fuel of density 0,784 gram / ml, kinematic viscosity 2,956 cSt, flash point 49 oC and caloric value 46,815 MJ/ kg.Keyword : pyrolysis, active clay, polypropylena, pyrolysis liquid fuel
Pembuatan Biodiesel Dari Minyak Biji Karet Menggunakan Reaktor Membran Fauzi, Subehan; Syarfi, Syarfi; Bahruddin, Bahruddin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

One of the challenges in biodiesel manufacturing were the limited conventional mass transfer. The problem can be solved by using new technology in the biodiesel manufacturing process, namely tmembrane reactor. Membrane reactor has a close relationship to productivity and selectivity. This research aims to study the effect of variations in the molar ratio and transmembrane pressure on the characteristics and productivity of biodiesel. This research was conducted by two stages of preparation of rubber seed oil and biodiesel production using a membrane reactor. Rubber seed oil preparation process consists of stripping, drying, resizing, extraction and degumming. Biodiesel production is conducted by using H2SO4 catalyst, reaction time 6 h, reaction temperature 60°C, the variation of the molar ratio of 1:15, 1:20 and 1:25 and transmembrane pressure of 1 bar, 1.5 bar and 2 bar. Results of preparation of rubber seed oil yield of 19% was obtained with a free fatty acid content before and after degumming is 37.6% and 29.12%. The results showed the highest yield of biodiesel production amounted to 62.15% at a molar ratio of 1:20 and a transmembrane pressure of 1.5 bar. Biodiesel produced has a density of 0.880 g/ml, viscosity 7.73 mm2/s and flash point 180oC. The largest composition of biodiesel ie 26.5% of Oleic Acid Methyl Ester.Keywords: biodiesel, membrane reactor, rubber seed oil