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All Journal PENA SAINS Lensa: Jurnal Kependidikan Fisika
Oktaffi Arinna Manasikana
Universitas Hasyim Asy'ari Tebuireng Jombang
Agriculture, Biological Sciences & Forestry Astronomy Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Mathematics Physics

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The Effect Of Additional Corn Husk Toward The Density Level of Light Brick Noer Af'idah; Oktaffi Arinna Manasikana; Andhika Mayasari
JURNAL PENA SAINS Vol 7, No 2 (2020): Jurnal Pena Sains
Publisher : Program Studi Pendidikan IPA, Fakultas Ilmu Pendidikan, Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jps.v7i2.8466

Abstract

The Light brick is an engineered product developed from the usual brick with the addition of mixed materials. Brick is one type of composite material. Many people choose to use natural fiber-reinforced composites to replace synthetic ones and composite materials engineering development. So in the technology of brick-making, natural fibers are currently used as a choice as additional material mixed to produce light bricks. Additional materials often used in light bricks include fly ash, sawdust, coconut husks, rice husks, etc. This study used corn husk waste as additional material in the light bricks making. The addition of corn husk powder can affect the mechanical properties of brick. It is shown by the more significant the percentage of corn husk powder added, the smaller the density and compressive test value of the brick produced. Meanwhile, the greater the porosity value is. The decrease in density level and compressive test value will undoubtedly affect the brick's mechanical and physical properties. The reduction in density level and mechanical properties of the brickwork can be minimized by applying an outer layer in the form of cement mortar of the products.
Implementation of Ecoliteracy and Ecorepreneurship to Grow Entrepreneurial Interest of Science Education Students Noer Af'idah; Lina Arifah Fitriyah; Oktaffi Arinna Manasikana
Lensa: Jurnal Kependidikan Fisika Vol 9, No 2: December 2021
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (649.16 KB) | DOI: 10.33394/j-lkf.v9i2.4443

Abstract

This study aimed to foster entrepreneurial interest in Science Education students at Hasyim Asy'ari University through the implementation of ecoliteracy and ecopreneurship in PKLH courses. This research is a type of descriptive research through a qualitative approach wich is carried out as an effort to provide insight and experience to students to reuse waste into quality products and high selling value. This research was conducted during the COVID-19 pandemic through an online system with two stages; first education about the environment (Ecoliteracy) and the second stage in the form of project assignments to manufacture environmental-based entrepreneurial products with waste as the main raw material. The results of the assignment can be used as entrepreneurial product innovations so that students are more creative in producing a product, as well as support one of the government programs to create a healthy and zero waste environment. From this research, it is known that ecoliteracy and ecopreneurship implementation activities can increase students' knowledge about environment; this can be seen from the average pre-test score of 72 to 80 in the post-test and an increase in the percentage of completeness from73% to 100%. Likewise, student interest in entrepreneurship increased, it was showed from the average score of pre-test and post-test 76 to 88. From this activity, student creativity was quite good with an average value 73, this can be seen from the variety of ecopreneurship products produced both from the types of basic materials and products.
Karakterisasi Komposit Aluminium Berpenguat Al2O3 Nanokristalin Hasil Kopresipitasi Noer Af'idah; Oktaffi Arinna Manasikana; Elly Indahwati
Lensa: Jurnal Kependidikan Fisika Vol 10, No 1: June 2022
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (746.224 KB) | DOI: 10.33394/j-lkf.v10i1.5361

Abstract

Pada saat ini kebutuhan terhadap komponen yang memiliki kemampuan struktural yang baik tetapi ringan telah mendorong perkembangan rekayasa material komposit bermatrik logam, salah satunya adalah komposit bermatrik aluminium. Penelitian ini dilakukan dengan tujuan untuk mengetahui pengaruh penguat Al2O3 nanokristalin hasil kopresipitasi terhadap sifat mekanik dan densitas dari komposit bermatrik aluminium. Berdasarkan hasil XRD (X-Ray Difractometer) menunjukkan bahwa serbuk Al2O3 (alumina) yang disintesis dengan menggunakan metode kopresipitasi mempunyai ukuran  kristal di bawah 100 nm. Selanjutnya serbuk alumina hasil kopresipitasi ini digunakan sebagai penguat (filler) dalam fabrikasi komposit bermatrik aluminium. Komposit difabrikasi dengan menggunakan metode metalurgi serbuk dan metode pencampuran basah (wet mixing) dengan media pencampur etanol. Campuran serbuk komposit dimasukkan dalam cetakan dengan diberi gaya tekan sebesar 15 KN selama 15 menit. Tahap pemanasan dilakukan dua kali yaitu pre-sintering pada suhu 2000C dan 4000C masing-masing 20 menit serta tahap sintering pada suhu 5000C selama 1 jam. Komposit aluminium dengan penguat alumina mikrokristalin juga dibuat sebagai pembanding. Hasil pengukuran densitas nanokomposit menunjukkan adanya peningkatan sebesar 1,74% dari mikrokomposit, sedangkan dari hasil uji kekerasan menggunakan microhardness tester menunjukkan peningkatan sebesar 37,98% dari mikrokomposit sebagai sampel pembanding.Characterization of Coprecipitation Nanocrystalline Al2O3 Reinforced Aluminum CompositeAbstractAt this time, the need for components with good structural capabilities but are light in weight has encouraged the development of metal matrix composite material engineering, one of which is aluminum matrix composites. The purpose of this research was to determine the effect of coprecipitation nanocrystalline Al2O3 reinforcement on the mechanical properties and density of aluminum matrix composites. Based on the results of XRD (X-Ray Diffractometer) showed that Al2O3 (alumina) powder synthesized using the coprecipitation method had a crystal size below 100 nm. Furthermore, the coprecipitation alumina powder is used as a filler to fabricate aluminum matrix composites. This aluminum matrix composite was fabricated using the powder metallurgy method and wet mixing method with ethanol mixing media. The composite powder mixture was put into the mold with a compressive force of 15 KN for 15 minutes. The heating stage was carried out twice, namely pre-sintering at a temperature of 2000C and 4000C each for 20 minutes and the sintering stage at 5000C for 1 hour. An aluminum composite with microcrystalline alumina reinforcement was also made for comparison. The results of the measurement of the density of the nanocomposite showed an increase of 1.74% from the micro composite, while the hardness test using the microhardness tester showed an increase of 37.98% from the micro composite as a comparison sample.
Co-Authors Elly Indahwati Lina Arifah Fitriyah Noer Af'idah