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<![CDATA[Pemanfaatan limbah kulit singkong termodifikasi alkanolamida sebagai bahan pengisi dalam produk lateks karet alam: Pengaruh waktu vulkanisasi ]]>
<![CDATA[Harahap, Hamidah]]>;
<![CDATA[Hadinatan, Kelvin]]>;
<![CDATA[Hartanto, Adrian]]>;
<![CDATA[Surya, Elmer]]>;
<![CDATA[Surya, Indra]]>
<![CDATA[ Majalah Kulit, Karet, dan Plastik Vol 31, No 1 (2015): Majalah Kulit, Karet, dan Plastik ]]>
Publisher : <![CDATA[Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia ]]>
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DOI: 10.20543/mkkp.v31i1.177
<![CDATA[The purpose of this research was to study the effect of drying time on the mechanical properties of natural rubber latex filled with cassava peel waste modified alkanolamide. Cassava peel is a waste, containing cellulose which is potential as fillers in natural rubber latex products. Cassava peel waste was dried and milled until the size of 100 mesh. Alkanolamide is one type of non-ionic surfactant which is synthesized from RBDPS (Refined Bleached Deodorized Palm Stearin) and diethanolamine. Alkanolamide has polar group which can modified cassava peel waste and make strong chemical bonding with natural rubber latex. The production of natural rubber latex products was started from pre-vulcanization at 70°C until the system was cured and the chloroform number has reached number 3. Natural rubber latex was formed into films by coagulant dipping and drying method at 120°C for 10 minutes and 20 minutes. Results show that longer drying time will improve the crosslink density and tensile strength of natural rubber latex products until the addition of 15 phr cassava peel waste powder. Keywords: drying time, alkanolamide, cassava peel, natural rubber latex.ABSTRAKPenelitian ini bertujuan untuk mempelajari pengaruh waktu vulkanisasi terhadap sifat mekanik produk lateks karet alam berpengisi kulit singkong termodifikasi alkanolamida. Kulit singkong merupakan limbah yang mengandung selulosa dan berpotensi untuk digunakan sebagai bahan pengisi dalam produk lateks karet alam. Kulit singkong dikeringkan dan dihaluskan hingga berukuran 100 mesh. Alkanolamida merupakan surfaktan non-ionik yang disintesis dari bahan baku RBDPS (Refined Bleached Deodorized Palm Stearin) dan dietanolamina. Alkanolamida mengandung gugus polar yang dapat memodifikasi tepung kulit singkong dan membentuk ikatan kimia yang kuat dengan lateks karet alam. Proses pembuatan produk lateks karet alam dimulai dengan proses pra-vulkanisasi pada suhu 70°C hingga lateks karet alam telah matang dan bilangan kloroform telah mencapai angka 3. Lateks karet alam dicetak dengan menggunakan teknik pencelupan berkoagulan dengan metode pengeringan pada suhu 120°C selama 10 menit dan 20 menit. Hasil penelitian menunjukkan waktu vulkanisasi yang lebih lama dapat meningkatkan nilai densitas sambung silang dan kekuatan tarik produk lateks karet alam hingga penambahan 15 phr tepung kulit singkong.    Kata kunci: waktu vulkanisasi, alkanolamida, kulit singkong, lateks karet alam.]]>
<![CDATA[Introduction of GIS software (Geographical information system) as a life Teachers and Students / imedium School for Namira Medan ]]>
<![CDATA[Kadreni, Emilia]]>;
<![CDATA[Mulia, Ahmad Perwira]]>;
<![CDATA[Pandia, Indra Jaya]]>;
<![CDATA[Harahap, Hamidah]]>;
<![CDATA[Manurung, Renita]]>
<![CDATA[ ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 2 (2019): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat ]]>
Publisher : <![CDATA[Talenta Publisher ]]>
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DOI: 10.32734/abdimastalenta.v4i2.4089
<![CDATA[Namira High School is one of the favorite schools in the city of Medan, with the number of students graduating and being accepted at the State University increasing from year to year. To further foster and improve the quality and creativity of Namira High School Students and Teachers, a technology-based training program for the Geographical Information System (GIS). Community Service Program is part of the Tri Dharma College, in collaboration with High School partners Namira, is expected to be able to increase learning in the Computer Laboratory to learn the concepts and technology of GIS which is relatively new. By attending this training, students get the opportunity to work more by utilizing geospatial-based information. The use of Geographical Information System (GIS) in various fields is very real, because GIS provides various facilities that are relatively easy to do. With the open source GIS software training, it is hoped that students and teachers at Namira High School will know the importance of geography literacy and its use in various fields.]]>
<![CDATA[Pemanfaatan limbah kulit singkong termodifikasi alkanolamida sebagai bahan pengisi dalam produk lateks karet alam: Pengaruh waktu vulkanisasi ]]>
<![CDATA[Hamidah Harahap]]>;
<![CDATA[Kelvin Hadinatan]]>;
<![CDATA[Adrian Hartanto]]>;
<![CDATA[Elmer Surya]]>;
<![CDATA[Indra Surya]]>
<![CDATA[ Majalah Kulit, Karet, dan Plastik Vol 31, No 1 (2015): Majalah Kulit, Karet, dan Plastik ]]>
Publisher : <![CDATA[Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia ]]>
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DOI: 10.20543/mkkp.v31i1.177
<![CDATA[The purpose of this research was to study the effect of drying time on the mechanical properties of natural rubber latex filled with cassava peel waste modified alkanolamide. Cassava peel is a waste, containing cellulose which is potential as fillers in natural rubber latex products. Cassava peel waste was dried and milled until the size of 100 mesh. Alkanolamide is one type of non-ionic surfactant which is synthesized from RBDPS (Refined Bleached Deodorized Palm Stearin) and diethanolamine. Alkanolamide has polar group which can modified cassava peel waste and make strong chemical bonding with natural rubber latex. The production of natural rubber latex products was started from pre-vulcanization at 70°C until the system was cured and the chloroform number has reached number 3. Natural rubber latex was formed into films by coagulant dipping and drying method at 120°C for 10 minutes and 20 minutes. Results show that longer drying time will improve the crosslink density and tensile strength of natural rubber latex products until the addition of 15 phr cassava peel waste powder. Keywords: drying time, alkanolamide, cassava peel, natural rubber latex.ABSTRAKPenelitian ini bertujuan untuk mempelajari pengaruh waktu vulkanisasi terhadap sifat mekanik produk lateks karet alam berpengisi kulit singkong termodifikasi alkanolamida. Kulit singkong merupakan limbah yang mengandung selulosa dan berpotensi untuk digunakan sebagai bahan pengisi dalam produk lateks karet alam. Kulit singkong dikeringkan dan dihaluskan hingga berukuran 100 mesh. Alkanolamida merupakan surfaktan non-ionik yang disintesis dari bahan baku RBDPS (Refined Bleached Deodorized Palm Stearin) dan dietanolamina. Alkanolamida mengandung gugus polar yang dapat memodifikasi tepung kulit singkong dan membentuk ikatan kimia yang kuat dengan lateks karet alam. Proses pembuatan produk lateks karet alam dimulai dengan proses pra-vulkanisasi pada suhu 70°C hingga lateks karet alam telah matang dan bilangan kloroform telah mencapai angka 3. Lateks karet alam dicetak dengan menggunakan teknik pencelupan berkoagulan dengan metode pengeringan pada suhu 120°C selama 10 menit dan 20 menit. Hasil penelitian menunjukkan waktu vulkanisasi yang lebih lama dapat meningkatkan nilai densitas sambung silang dan kekuatan tarik produk lateks karet alam hingga penambahan 15 phr tepung kulit singkong. Kata kunci: waktu vulkanisasi, alkanolamida, kulit singkong, lateks karet alam.]]>
<![CDATA[PENGARUH BIODEGRADASI DENGAN TEKNIK PENANAMAN TERHADAP PRODUK LATEKS KARET ALAM BERPENGISI TEPUNG KULIT PISANG YANG DIPUTIHKAN DENGAN HIDROGEN PEROKSIDA ]]>
<![CDATA[Erick Kamil, Emelya Khoesoema, Hamidah Harahap]]>
<![CDATA[ Jurnal Teknik Kimia USU Vol 1, No 2 (2012) ]]>
Publisher : <![CDATA[Universitas Sumatera Utara ]]>
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DOI: 10.32734/jutek.v1i2.107
<![CDATA[Natural rubber latex products filled with bleached banana skin powder were identified by burying samples in soil. Soil burial was carried out by adding NPK fertilizer and without fertilizer. One of the tests which was carried out was weight loss calculation. Weight loss calculation showed that natural rubber latex products filled with bleached banana skin powder biodegraded faster than natural rubber latex products without filler. The addition of fertilizer also contributed to biodegradability of samples. The other test was FTIR (Fourier Transform Infrared Spectroscopy) test. The results of FTIR test showed there were structure changes in natural rubber latex which indicated natural rubber latex had been biodegraded.Keywords: biodegradation, bleaching, banana skin powder, natural rubber latex, hydrogen peroxide]]>
<![CDATA[PENGARUH PENCUACAAN ALAMI TERHADAP PRODUK LATEKS KARET ALAM BERPENGISI TEPUNG KULIT PISANG YANG DIPUTIHKAN DENGAN HIDROGEN PEROKSIDA ]]>
<![CDATA[Emelya Khoesoema, Erick Kamil, Hamidah Harahap]]>
<![CDATA[ Jurnal Teknik Kimia USU Vol 1, No 2 (2012) ]]>
Publisher : <![CDATA[Universitas Sumatera Utara ]]>
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DOI: 10.32734/jutek.v1i2.108
<![CDATA[The effect of exposing bleached banana skin powder-filled natural rubber products to sun light and weather with variation of bleached banana skin powder filler loading. Banana skin powder was dried and bleached with hydrogen peroxide and made into disperse system. Natural rubber latex was compounded with bleached banana skin powder with filler loading of 0 to 20 phr (per hundred rubber). Natural rubber latex products, which were produced, were hung in air and exposed to sun light and weather. The degradation of bleached banana skin powder-filled natural rubber products were evaluated by calculating weight loss of samples and performing Fourier transform infrared spectroscopy (FTIR) test. Natural rubber latex lost weight after exposure to sun light and weather from 1 to 16 weeks due to photo-oxidation process.Keywords: latex, banana skin powder, biodegradation, hydrogen peroxide, weight loss ]]>
<![CDATA[KEMAMPUAN ADSORBEN LIMBAH LATEKS KARET ALAM TERHADAP MINYAK PELUMAS DALAM AIR ]]>
<![CDATA[Edward Tandy, Ismail Fahmi Hasibuan, Hamidah Harahap]]>
<![CDATA[ Jurnal Teknik Kimia USU Vol 1, No 2 (2012) ]]>
Publisher : <![CDATA[Universitas Sumatera Utara ]]>
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DOI: 10.32734/jutek.v1i2.153
<![CDATA[Natural rubber latex waste usually throw away to be unused materials and caused environment issue. One of the ways to handle this environment issue by using natural rubber latex waste as oil adsorbent. Natural rubber latex waste also had oleophilic and hydrophobic properties that are suitable to being used as oil adsorbent. In this research, researchers found out adsorption capacity of natural rubber latex waste to oil and oil from water, also the characteristics of it’s adsorption with Langmuir and Freundlich isoterm adsorption model. The adsorption characteristics of lubricant oil from water with natural rubber latex waste more fitted well with Langmuir isotherm equation model and the maximum adsorption ability of lubricant oil from water with natural rubber latex waste also significantly increased with the contact time till reached the equilibrium. The results of this study concluded that natural rubber latex waste had a great adsorption capacity and suitabled for being used as oil adsorbent.Keywords : natural rubber latex waste, oil in water, adsorption, adsorption equilibrium, oil adsorbent]]>
<![CDATA[PEMANFAATAN LIMBAH LATEKS KARET ALAM DENGAN PENGISI BUBUK PELEPAH PISANG SEBAGAI ADSORBEN MINYAK ]]>
<![CDATA[Ismail Fahmi Hasibuan, Edward Tandy, Hamidah Harahap]]>
<![CDATA[ Jurnal Teknik Kimia USU Vol 1, No 2 (2012) ]]>
Publisher : <![CDATA[Universitas Sumatera Utara ]]>
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DOI: 10.32734/jutek.v1i2.203
<![CDATA[The use of waste of natural rubber latex with banana sheats powder filler to serve as a more useful product that is used as adsorbent of oil. The process begins with drying the adsorbent manufacture banana and polished up to 100 mesh size. Then the banana powder mixed with waste latex with variations of 10 and 20% (w / w). The analysis of the ability of the adsorbent adsorption isotherms using the Langmuir equation and Freundlich isotherm equation. Research carried out by the batch process and the use of lubricating oil as the adsorbate. The results obtained showed the addition of banana powder as filler waste adsorbent adsorption of latex increases the ability of the oil adsorbent. The conclusion of the analysis showed an increase in the number of characteristics adsroben banana powder can enhance the adsorption of adsorbent.Keywords : natural rubber latex waste, banana sheaths powder, adsorbent oil, adsorption ability]]>
<![CDATA[PENGARUH WAKTU SIMPAN FILM PLASTIK BIODEGRADASI DARI PATI KULIT SINGKONG TERHADAP SIFAT MEKANIKALNYA ]]>
<![CDATA[Fauzi Akbar, Zulisma Anita, Hamidah Harahap]]>
<![CDATA[ Jurnal Teknik Kimia USU Vol 2, No 2 (2013) ]]>
Publisher : <![CDATA[Universitas Sumatera Utara ]]>
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DOI: 10.32734/jutek.v2i2.2056
<![CDATA[Biodegradable plastics are plastics that will decompose in nature with the help of microorganisms. The use of starch as the main material of plastic manufacturing has great potential because in Indonesia there are different starch crops. To obtain bioplastics, starch is added to the plasticizer glycerol, in order to obtain a more flexible plastic and elastic. This study reviews the use of cassava starch and glycerol skin as a base for the manufacture of biodegradable plastics. The purpose of this research is to know the effect of storage time on the mechanical properties of plastic film biodegradation of starch cassava peel. The results obtained in the form of a thin sheet plastic film that have been tested mechanical properties such as tensile strength, elongation at break, and elasticity. Mechanical properties of plastic films will decrease every week due to the absorption of moisture and plasticizer migration occurs in a matrix of plastic films for storage. Keywords : Biodegradable, skin cassava starch, plasticizers]]>
<![CDATA[PENGARUH PENAMBAHAN GLISEROL TERHADAP SIFAT MEKANIK FILM PLASTIK BIODEGRADASI DARI PATI KULIT SINGKONG ]]>
<![CDATA[Zulisma Anita, Fauzi Akbar, Hamidah Harahap]]>
<![CDATA[ Jurnal Teknik Kimia USU Vol 2, No 2 (2013) ]]>
Publisher : <![CDATA[Universitas Sumatera Utara ]]>
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DOI: 10.32734/jutek.v2i2.2059
<![CDATA[Biodegradable plastics are plastics that will decompose in nature with the help of microorganisms. The use of starch as the main material of plastic manufacturing has great potential because in Indonesia there are different starch crops. To obtain bioplastics, starch is added to the glycerol, in order to obtain a more flexible plastic and elastic. This study reviews the use of cassava starch and glycerol skin asa base for the manufacture of biodegradable plastics. The purpose of this research is to know the effect of adding glycerol in the process of making biodegradable plastic from cassava peel waste. In this research, the study of bioplastic manufacturing mixed starch with glycerol as a plastisizer to do variations of the glycerol. The results obtained in the form of a thin sheet of plastic (plastic film) that have been tested mechanical properties obtained optimum data variables namely cassava starch composition 3,5%, and the power og pull 0,02122Mpa, and plastic film storage time for 14 days. Keywords: biodegradable, film plastic, plasticizers]]>
<![CDATA[KARAKTERISASI POLIMER KONDUKTIF POLIPIROL BERPENGISI SERBUK BAN UNTUK MENDETEKSI KONDUKTIVITAS MINYAK ]]>
<![CDATA[Satriaji Sudigdo, Rizky Dharmawan, Hamidah Harahap]]>
<![CDATA[ Jurnal Teknik Kimia USU Vol 3, No 2 (2014) ]]>
Publisher : <![CDATA[Universitas Sumatera Utara ]]>
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DOI: 10.32734/jutek.v3i2.7317
<![CDATA[Conductive polymer sensor based polypyrrole (ppy) and tire dust and 1,4-methyl-pyrrolidinone was made by using polymerization process. The polymerization process was prepared at temperature 100°C in boiling water for 30 minutes. Conductive polymer sensor is undergone several type of analysis including electrical conductivity, Scanning Electron Microscopy (SEM), Fourier Transform Infrared (FTIR),and X-Ray Diffraction (XRD). The test used some kind of oil (palm oil,corn oil, diesel, and engine oil). The conductivity test result shows that sensor-4 (contain 20 phr of tire dust) in 80°C at 30 minutes had the highest conductivity. Scanning Electron Microscopy result shows the rough surface and well dispersed of tire dust in polypyrrole/tire dust blends. The XRD analysis shows the Face Centered Cubic (FCC) crystallographic structure of the sensor. The oil conductivity test shows that the corn oil is more reactive than others.]]>
