Garuda - Garba Rujukan Digital

Preparation Of Natural Rubber/High Density Polyethylene Composite Reinforced Rice Husk Treated With Liquid Epoxidized Natural Rubber (LENR) Syafri, Rahmadini; Abdullah, Prof Dr. Ibrahim; Ahmad, Prof Madya Dr. Ishak
Jurnal Zarah Vol 1 No 1` (2013): Jurnal Zarah
Publisher : Program Studi Pendidikan Kimia, Fakultas Keguruan dan Ilmu Pendidikan Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (192.44 KB)

Thermoplastic natural rubber (TPNR) composites with rice husk (RH) as filler were prepared via melt blending using an internal mixer Brabender Plasticorder. TPNR matrix was prepared from natural rubber (NR) and high density polyethylene (HDPE) with a composition ratio of 60:40. The optimum processing parameters for NR/HDPE matrix was obtained at 135 oC, at mixing rate of 50 rpm and blending time of 12 minutes, while the parameters for the NR/HDPE/RH composite was at 135 oC mixing rate of 45 rpm and blending time of 12 minute. Addition of rice husk into the NR/HDPE matrix was aimed to reinforce the composites with the filler. The high silica content of rice husk has made rice husk to be used as potential reinforcement filler for composites. However, the application of rice husk as filler is limited due to the hydrophilic nature of rice husk surface causing incompatibility and weak interfacial adhesion between rice husk and the hydrophobic polymer matrix. Hence, the cellulose surface of rice husk has to be modified. The rice husk was treated with sodium hydroxide (NaOH) as pre-treatment and later coated with liquid epoxidized natural rubber (LENR). Several concentrations of NaOH solution were used for alkali treatment of untreated rice husk (RHi) and the most effective was at 5% NaOH in aqueous solution (RHiNa). LENR coating was also carried out at several concentrations from 5% to 20% LENR in toluene. Characterizations of rice husk surfaces were analyzed by FTIR, optical microscope and SEM micrograph. The mechanical properties of rice husk filled composites observed, showed that the maximum value obtained were for composites reinforced with alkali treated and coated with 10% of LENR (RHiNaLE 2). The tensile and impact strength obtained were 6.9 MPa and 24.6 kJ/m2 respectively. Effects of RHiNaLE 2 loading on tensile and impact strengths of composites showed that the properties decreased at higher loadings due to agglomeration of filler particles. However the tensile modulus and hardness were found to increase with filler loading. The dynamic mechanical thermal analysis also showed that composites prepared exhibited a shift in the tan delta peak (Tg) to a higher temperature due to the increased RHiNaLE 2-Matrix interaction. In conclusion, modification of rice husk surface via NaOH treatment and coating with LENR was successful in reducing the hydrophilic nature of rice husk powder. The RHi-Matrix interfacial adhesion had improved which lead to higher mechanical properties of the composites prepared.

ANALISA UNSUR HARA MAKRO PUPUK ORGANIK CAIR (POC) DARI LIMBAH INDUSTRI KERIPIK NENAS DAN NANGKA DESA KUALU NENAS DENGAN PENAMBAHAN URIN SAPI DAN EM4 Syafri, Rahmadini; Chairil, -; Simamora, Denise
Sistem Informasi Vol 8 No 01 (2017): Jurnal Photon
Publisher : Fakultas MIPA dan Kesehatan Universitas Muhammadiyah Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (822.17 KB)

Tujuan penelitian ini ialah pembuatan produk pupuk organik cair yang memiliki kualitas setara dengan POC komersil dengan memanfaatkan limbah dari industri pembuatan keripik nenas dan nangka serta limbah urin sapi secara fermentasi dengan aktivator EM4 dan aditif tetes tebu (molasses) untuk meningkatkan kandungan hara makro dan mikro sehingga dihasilkan pupuk organik cair kualitas tinggi sesuai dengan standar baku mutu pupuk organik cairPermentan No.28/Permentan/OT140/2/2009. Berdasarkan data keseluruhan hasil pengukuran kadar pupuk organik cair yang dibuat dengan 3 variasi komposisi (POC1, POC2 dan POC3), menunjukkan bahwa pupuk organik cair yang terbaik adalah POC1 dengan variasi komposisi yaitu 3 liter limbah cair kulit nenas dan nangka dengan penambahan 9 liter limbah urin sapi. Waktu optimum fermentasi untuk pembuatan pupuk organik cair dari campuran limbah cairkulit nenas dan nangka serta urin sapi adalah 14 hari karena nilai kadar hara makro dan mikro optimum diperoleh pada waktu tersebut. Kadar hara makro untuk Nitrogen total yang optimum didapati pada sampel POC1 yaitu 0.03%, Fosfor (P2O5) optimum diperoleh juga dari sampel POC1 yaitu 0.007% dan Kalium (K2O) optimum diperoleh juga dari sampel POC1 yaitu 0.29%.

Preparation Of Natural Rubber/High Density Polyethylene Composite Reinforced Rice Husk Treated With Liquid Epoxidized Natural Rubber (LENR) Syafri, Rahmadini; Abdullah, Prof Dr. Ibrahim; Ahmad, Prof Madya Dr. Ishak
Jurnal Zarah Vol 1 No 1` (2013): Jurnal Zarah
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Thermoplastic natural rubber (TPNR) composites with rice husk (RH) as filler were prepared via melt blending using an internal mixer Brabender Plasticorder. TPNR matrix was prepared from natural rubber (NR) and high density polyethylene (HDPE) with a composition ratio of 60:40. The optimum processing parameters for NR/HDPE matrix was obtained at 135 oC, at mixing rate of 50 rpm and blending time of 12 minutes, while the parameters for the NR/HDPE/RH composite was at 135 oC mixing rate of 45 rpm and blending time of 12 minute. Addition of rice husk into the NR/HDPE matrix was aimed to reinforce the composites with the filler. The high silica content of rice husk has made rice husk to be used as potential reinforcement filler for composites. However, the application of rice husk as filler is limited due to the hydrophilic nature of rice husk surface causing incompatibility and weak interfacial adhesion between rice husk and the hydrophobic polymer matrix. Hence, the cellulose surface of rice husk has to be modified. The rice husk was treated with sodium hydroxide (NaOH) as pre-treatment and later coated with liquid epoxidized natural rubber (LENR). Several concentrations of NaOH solution were used for alkali treatment of untreated rice husk (RHi) and the most effective was at 5% NaOH in aqueous solution (RHiNa). LENR coating was also carried out at several concentrations from 5% to 20% LENR in toluene. Characterizations of rice husk surfaces were analyzed by FTIR, optical microscope and SEM micrograph. The mechanical properties of rice husk filled composites observed, showed that the maximum value obtained were for composites reinforced with alkali treated and coated with 10% of LENR (RHiNaLE 2). The tensile and impact strength obtained were 6.9 MPa and 24.6 kJ/m2 respectively. Effects of RHiNaLE 2 loading on tensile and impact strengths of composites showed that the properties decreased at higher loadings due to agglomeration of filler particles. However the tensile modulus and hardness were found to increase with filler loading. The dynamic mechanical thermal analysis also showed that composites prepared exhibited a shift in the tan delta peak (Tg) to a higher temperature due to the increased RHiNaLE 2-Matrix interaction. In conclusion, modification of rice husk surface via NaOH treatment and coating with LENR was successful in reducing the hydrophilic nature of rice husk powder. The RHi-Matrix interfacial adhesion had improved which lead to higher mechanical properties of the composites prepared.

PELATIHAN PEMBUATAN PUPUK ORGANIK CAIR BAGI KELOMPOK TANI DESA KARTAMA PEKANBARU Rahmadini Syafri; Rahmiwati Hilma; Hasmalina Nst; Prasetya Pras
Jurnal Pengabdian UntukMu NegeRI Vol 1 No 1 (2017): Pengabdian Untuk Mu negeRI
Publisher : LPPM UMRI

Berbagai macam bentuk usaha untuk mencukupi perekonomian keluarga telah dilakukanmasyarakat khususnya Desa Kartama. Upaya yang mereka tekuni tentunya harus dapatmenghasilkan peningkatan ekonomi keluarga. Pertanian sayur mayur, ubi kayu danpeternakan merupakan salah satu usaha yang dilakukan oleh sebagian besar masyarakatDesa Kartama hingga saat ini.Usaha ini tentu sangat menguntungkan jika bisa dikeloladengan baik. Namun, terdapat permasalahan yang timbul dalam usaha pertanian sayur,perkebunan dan peternakan bagi sebagian masyarakat Desa Kartama. Permasalahanyang terjadi saat ini yaitu mahalnya harga pupuk komersil (kimia) yang dibutuhkanuntuk sektor pertanian serta limbah peternakan baik urin maupun feses ternak yangdapat mencemari lingkungan. Untuk itu melalui program pengabdian kepada masyarakatini kami memberikan ide kepada warga setempat yang memiliki perkebunan seperti sayurmayur, umbi-umbian untuk membuat pupuk sendiri dari bahan organik agar dapatmengurangi biaya perkebunan warga, dikarenakan untuk membuat pupuk organik cairtersebut tidak memakan banyak biaya karena bahan dasarnya diperoleh dari limbahrumah tangga seperti sisa buah-buahan dan sayur-sayuran. Disamping itu limbah daripeternakan juga dapat dimanfaatkan sebagai bahan dalam pembuatan pupuk organikcair.

PELATIHAN PEMBUATAN PUBLIKASI ILMIAH GURU-GURU SMA N 2 TAMBANG KABUPATEN KAMPAR Jufrizal Syahri; Rahmiwati Hilma; Hasmalina Nasution; Prasetya Prasetya; Rahmadini Syafri; Sri Hilma Siregar; Nurlaili Nurlaili
Jurnal Pengabdian UntukMu NegeRI Vol 2 No 1 (2018): Pengabdian Untuk Mu negeRI
Publisher : LPPM UMRI

The writing of scientific writing is one of the efforts to develop the profession of teachers of SMA N 2 Tambang in Kampar regency. This training aims to equip teachers in terms of strategies to develop scientific papers properly in accordance with the guidelines of writing, and equip teachers in the publication procedures of scientific papers in the journal. The training of scientific writing is done by varied lecture method and practice. The lecture method is needed to explain the procedure for the preparation of scientific papers, including how to arrange classroom action research into a scientific paper. Methods of practice are needed to allow the participants to write scientific papers in the form of articles for journals. The training activities of the writing of scientific papers as a whole can be said to be well seen from the achievement of the target of the trainee, the achievement of the training objectives, the achievement of the planned material targets, and the ability of the participants in the mastery of the material. The supporting factors for the implementation of Community Service activities are the availability of experts in SMA N 2 Tambang, the enthusiasm of the participants, the support of the principal of the place of administration, and the supporting funds of the faculty.

PELATIHAN, PEMBIMBINGAN PTK DAN PUBLIKASI ILMIAH GURU-GURU SMA NEGERI 7 PEKANBARU Rahmiwati Hilma; Prasetya Prasetya; Hasmalina Nasution; Rahmadini Syafri; Fitra Perdana; Jufrizal Syahri; Sri Hilma Siregar
Jurnal Pengabdian UntukMu NegeRI Vol 3 No 1 (2019): Pengabdian Untuk Mu negeRI
Publisher : LPPM UMRI

Scientific writing training was one of the efforts to develop the profession of high school teachers N 7 Pekanbaru. The training aims to equip high school teachers of N 7 Pekanbaru in terms of strategizing the scientific papers correctly according to the writing guidelines, and equip the teachers in the scientific writing publication procedures in the journal. The training method is the percentage of resources, discussion and simulation of papers that have been prepared by the trainees. The lecture method is necessary to explain the procedures of scientific writing, including how to arrange class action research into a scientific work. The exercise/practice method is required to give participants a scientific writing for the journal article. This scientific writing training activity in its entirety can be said to be seen from the achievement of the target participants, the achievement of training objectives, the achievement of planned target material, and the ability of participants in Material. The supporting factors in this community service activities are the availability of experts who are imported to the training in SMA N 7 Pekanbaru, participant enthusiasm, the support of the school principal, and the supporting fund of the university . The Output of this activity is expected to have several teacher papers (participants) in the form of journals and proceeding that are ready to be submitted to the relevant journal. Keywords: scientific writings, scientific publications, teacher profession development

Pemberdayaan Ekonomi Dasawisma Rantau Kopar, Rokan Hilir dengan “SaMaKiRi” (Sabun Mahasiswa Kimia UMRI) Rahmadini Syafri; Prasetya; Jufrizal Syahri; Rahmiwati Hilma; Hasmalina Nasution; Sri Hilma Siregar; Fitra Perdana
Jurnal Pengabdian UntukMu NegeRI Vol 6 No 1 (2022): Pengabdian Untuk Mu negeRI
Publisher : LPPM UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jpumri.v6i1.3669

Kabupaten Rokan Hilir dikenal dengan kekayaan ragam budaya dan objek pariwisatannya. Salah satu tradisi turun temurun yang kini menjadi primadona wisata Rokan Hilir adalah ritual Upacara Bakar Tongkang yang kini menjadi agenda wisata tahunan Kabupaten Rokan Hilir. Sejak masa pandemi COVID-19 event tahunan ini terkendala pelaksanaannya mengingat akan mengundang banyak turis hadir dan kerumunan massa. Situasi ini memberikan dampak yang signifikan terhadap tatanan kehidupan sosial dan ekonomi masyarakat global, termasuk masyarakat di Desa Rantau Kopar, Kab. Rokan Hilir. Pada kegiatan ini dilakukan pemberdayaan ekonomi berupa penyuluhan dan pelatihan bagi Ibu-ibu Dasawisma Rantau Kopar untuk memproduksi sendiri produk sabun untuk penerapan protokol kesehatan dan peningkatan pendapatan. Kegiatan ini dilakukan secara offline/luring dengan protokol kesehatan yang ketat. Kegiatan terlaksana dengan baik, terlihat dengan antusias peserta akan materi-materi pelatihan, jumlah peserta yang tidak berubah dari awal kegiatan sampai selesai. Dari kegiatan ini dihasilkan produk sabun “SaMaKiRi” yang diproduksi oleh peserta pelatihan dan Tim dari Prodi Kimia UMRI. Diharapkan kegiatan ini dapat berkelanjutan dan menjadi solusi untuk peningkatan ekonomi kreatif di Desa Rantau Kopar, Kabupaten Rokan Hilir.

ANALISA UNSUR HARA MAKRO PUPUK ORGANIK CAIR (POC) DARI LIMBAH INDUSTRI KERIPIK NENAS DAN NANGKA DESA KUALU NENAS DENGAN PENAMBAHAN URIN SAPI DAN EM4 Rahmadini Syafri; - Chairil; Denise Simamora
Sistem Informasi Vol 8 No 01 (2017): Jurnal Photon
Publisher : LPPM Universitas Muhammadiyah Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jp.v8i01.539

Tujuan penelitian ini ialah pembuatan produk pupuk organik cair yang memiliki kualitas setara dengan POC komersil dengan memanfaatkan limbah dari industri pembuatan keripik nenas dan nangka serta limbah urin sapi secara fermentasi dengan aktivator EM4 dan aditif tetes tebu (molasses) untuk meningkatkan kandungan hara makro dan mikro sehingga dihasilkan pupuk organik cair kualitas tinggi sesuai dengan standar baku mutu pupuk organik cairPermentan No.28/Permentan/OT140/2/2009. Berdasarkan data keseluruhan hasil pengukuran kadar pupuk organik cair yang dibuat dengan 3 variasi komposisi (POC1, POC2 dan POC3), menunjukkan bahwa pupuk organik cair yang terbaik adalah POC1 dengan variasi komposisi yaitu 3 liter limbah cair kulit nenas dan nangka dengan penambahan 9 liter limbah urin sapi. Waktu optimum fermentasi untuk pembuatan pupuk organik cair dari campuran limbah cairkulit nenas dan nangka serta urin sapi adalah 14 hari karena nilai kadar hara makro dan mikro optimum diperoleh pada waktu tersebut. Kadar hara makro untuk Nitrogen total yang optimum didapati pada sampel POC1 yaitu 0.03%, Fosfor (P2O5) optimum diperoleh juga dari sampel POC1 yaitu 0.007% dan Kalium (K2O) optimum diperoleh juga dari sampel POC1 yaitu 0.29%.

Analisa Makanan Tradisional Jeruk Maman dari Daun Maman (Cleome gynandra L) Sahira; Sri Hilma Siregar; Rahmadini Syafri; Hasmalina
Sistem Informasi Vol 11 No 2 (2021): Jurnal Photon
Publisher : LPPM Universitas Muhammadiyah Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jp.v11i2.2513

Jeruk maman merupakan asinan sayur yang menghasilkan asam laktat, sehingga mempunyai cita rasa yang khas. Tujuan dari penelitian ini adalah untuk mengetahui kualitas makanan Jeruk maman dari tiga variasi jeruk maman. Penelitian ini menggunakan metode eksperimen, yaitu melakukan penambahan cabai dan garam dalam jumlah yang berbeda pada jeruk maman. Jeruk maman yang dibuat sebanyak tiga variasi yaitu: DKA 01 = daun maman 500 g, ditambah nasi 2% DKA 02= daun maman 500 gr penambahan, nasi 2% garam 2,25% dan cabai 1%, DKA 03= daun maman 500 gr penambahan nasi 2% garam 2,5% dan cabai 1%. Diamkan selama 3 hari, selanjutnya di analisa pH, kadar air,total asam laktat, bakteri asam laktat dan protein untuk semua perlakuan. Penelitian ini menggunakan bentuk Rancangan Acak Lengkap (RAL) non-faktorial dengan 1 faktor yang diuji terdiri dari 3 taraf perlakuan dan 2 kali ulangangan. Hasil penelitan Kualitas yang terbaik dari ketiga variasi jeruk maman yaitu pada analisa kadar protein kualitas yang terbaik adalah sampel DKA 01 dengan jumlah protein tertinggi yaitu 2,47% dan nilai total asam tertitrasi tertinggi juga pada sampel DKA 01 yaitu 0,37%. Sementara pada analisa pH terbaik adalah sampel DKA 02 yaitu 3,9 %dan DKA 03 yaitu 3,8 %. Hasil analisa BAL terbaik adalah sampel DKA 02 1,7 x 108 dan DKA 03 yaitu 1,5 x 108.

Sintesis Biodiesel dari Minyak Jelantah Menggunakan Katalis Bentonit, K-Bentonit Dan K-Bentonit Terimpregnasi CaO Hasmalina Nasution; Wahyuni Puspita Sanda; Rahmadini Syafri; Sri Hilma Siregar; Yuhelson; Prasetya
Sistem Informasi Vol 12 No 1 (2021): Jurnal Photon
Publisher : LPPM Universitas Muhammadiyah Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jp.v12i1.3312

Biodiesel is an alternative fuel for diesel engines produced by a transesterification reaction between vegetable oils or animal fats containing triglycerides and alcohol, one of which is methanol. The use of homogeneous base catalysts in the synthesis of biodiesel still poses a problem for the environment because it is difficult to separate, therefore, researchers use variations of heterogeneous base catalysts. The synthesis of biodiesel from used cooking oil was carried out through a transesterification reaction with technical methanol with a catalyst of CaO impregnated Bentonite, K-Bentonite and Bentonite using the reflux method at 65ºC for 2 hours. The ratio of the volume of oil, methanol, and catalyst used is 5:1:1%-w oil. Based on the research that has been done, the yield of each catalyst is 84.85% bentonite, 84.24% K-bentonite and 89.27% K-bentonite-CaO. The characteristics of biodiesel obtained from each of these catalysts such as calorific value and density have met the quality requirements of the Indonesian National Standard (SNI 7182-2012), except for the acid number and kinematic viscosity which still exceed the quality requirements of SNI 7182-2012.

Title

Found 18 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 18 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 18 Documents
Search