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PROPERTIES OF CASSAVA STARCH BASED BIOPLASTIC REINFORCED BY NANOCLAY Wahyuningtiyas, Nanang Eko; Suryanto, Heru
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 2, No 1 (2018)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (572.007 KB) | DOI: 10.17977/um016v2i12018p020

Abstract

Synthetic Synthetic plastic is chemical materials which cause severe environmental problems. Incinerating plastic waste leads to release of hazardous gases, which is not good for humans. Bioplastic can help reduce the dependence on fossil fuels and petroleum, that bioplastic can solve the problem of synthetic plastic use. This research aims to define the properties of the cassava starch-based bioplastic reinforced by nanoclay. Methods were experimental with bioplastic component of cassava starch, glycerol as plasticizer and nanoclay as reinforcement. The bioplastic was analyzed using XRD, tensile test, moisture absorption, biodegradability, and compared with another bioplastic. The results show that the addition of nanoclay into bioplastic results increasing the tensile strength of bioplastic also increases from 5.2 MPa to 6.3 MPa. This research revealed that complete degradation of nanoclay reinforced bioplastic could be achieved on the 6th day.
Pengaruh Perlakuan Alkali (NaOH) Terhadap Morfologi dan Kekuatan Tarik Serat Mendong Witono, Kris; Irawan, Yudy Surya; Soenoko, Rudy; Suryanto, Heru
Rekayasa Mesin Vol 4, No 3 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (692.104 KB)

Abstract

Chemical modification on fiber by using Natrium Hydroxide (NaOH) solution directly affect to the fiber structure such as changing the chemical composition of the fiber and improve the performance of natural fiber as the composite reinforcement. The purpose of this study is to inverstigate the effects of NaOH solution to the tensile strength and the mofology of Mendong fiber. The concentration of NaOH solution were 2,5% v/v; 5% v/v; dan 7,5% v/v on this experiment. Mendong fiber was soaked for 2, 4 and 6 hours in NaOH solution. The temperature on this study was 26 o C. The tensile strength of Mendong fiber was increased by increasing the NaOH solution concentration and duration of soaking after exceed the concentration of NaOH solution and duration of soaking the tensile strength would be decreased. The highest tensile strength was 497,34 MPa with NaOH solution concentration 5% v/v and the duration of soaking, 2 hours. The roughness of Mendong fiber by soaking in NaOH solution was higher than without soaking in NaOH solution. Soaking on the highest concentration of NaOH solution caused the highest roughness.Keywords: NaOH solution, Mendong fiber, tensile strength, roughness.
ANALYSIS OF BIODEGRADATION OF BIOPLASTICS MADE OF CASSAVA STARCH Wahyuningtiyas, Nanang Eko; Suryanto, Heru
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 1, No 1 (2017)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7412.168 KB) | DOI: 10.17977/um016v1i12017p024

Abstract

Environmental pollution due to plastic waste taking too long to decompose has become a global problem. There have been numerous solutions proposed, one of which is the use of bioplastics. The use of cassava starch as the main ingredient in the manufacture of bioplastics shows great potential, since Indonesia has a diverse range of starch-producing plants. The aim of the present study is to analyse the effect of glycerol on microbial degradation. This experimental research investigated the use of cassava flour mixed with glycerol plasticizer at various concentrations (0, 2, 2.5, 3%) in the synthesis of bioplastics. The aspects studied were biodegradability, moisture absorption (using ASTM D570), shelf life, and morphological properties (using a camera equipped with a macro lens) and SEM. This study revealed that complete degradation could be achieved on the 9th day. The addition of a large concentration of glycerol would accelerate the microbial degradation process, increase moisture, and extend the shelf life of bioplastics in a dry place.
THE EFFECT OF CHLOROPHYLL CONCENTRATION FROM PAPAYA LEAVES ON THE PERFORMANCE OF DYE SENSITIZED SOLAR CELL Rizali, Dede; Suryanto, Heru; Sukarni, Sukarni
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 3, No 2 (2019)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (934.282 KB) | DOI: 10.17977/um016v3i22019p059

Abstract

Dye-Sensitized Solar Cell (DSSC) is the third generation solar cell that has sandwich structure consisted of organic dye material and other components such as titanium dioxide (TiO2) semiconductor, electrolyte, and substrates (counter electrode and working electrode). The dye in the device was made from green plant chlorophyll such as papaya. This research aimed to find the influence of dye concentration from papaya leaves chlorophyll on the performance of DSCC. The discussion covered the output power (Pout), Fill Factor (FF), and efficiency (?). The method in this research was explorative experimental with independent variables such as direct and indirect sunlight. The dependent variables were output power (Pout), Fill Factor (FF), and efficiency (?) from the DSSC. The procedures in this research consisted of substrates preparation, TiO2 paste production, dye solution preparation, electrolyte preparation, counter electrode preparation, and DSSC assembly. The tests on chlorophyll concentration were conducted using spectrophotometry method while the DSSC performance test used 1,000 W/cm2 halogen lamp. The results showed that 100% chlorophyll concentration resulted in 3.1295 mg/m3 chlorophyll content type a. The best DSSC performance was obtained by the DSSC sample that had 100% chlorophyll concentration and 1.1294 mg/m3 chlorophyll content. The direct light of DSSC achieved Pout of 0.9557 mW, FF of 0.07282, and efficiency of 1.499137%. The DSSC with indirect light obtained Pout of 0.00455 mW, FF of 0.01535, and efficiency of 0.049863%.
THERMOGRAVIMETRIC AND KINETIC ANALYSIS OF CASSAVA STARCH BASED BIOPLASTIC Wahyuningtyas, Nanang Eko; Suryanto, Heru; Rudianto, Eddy; Sukarni, Sukarni; Puspitasari, Poppy
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 1, No 2 (2017)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (696.095 KB) | DOI: 10.17977/um016v1i22017p069

Abstract

Cassava starch based bioplasticfor packaging application has great potency because of the various starch-producing plants in Indonesia.Bioplasticcan contribute to reduce the dependence on fossil fuels andpetroleumthat can solve the environmentalproblem.Thepurpose of this research is to find out the thermal decomposition and the activation energy of cassava starch based bioplastic. The methods weresynthesis bioplastic with cassava starch as main component and glycerol as plasticizer. The thermogravimetry analysis was conducted to obtain the decomposition process mechanism of bioplastic and the heating valueof bioplasticwas measured  using theadiabatic bomb calorimetric.  Data analysis was conducted using  a fitting model approach with an acikalin method to determine the activation energy. The result of thethermogravimetricanalysis showed thatbioplasticisgraduallydecomposedto the moisture, volatilematter, fixed carbon, andash in four stages mechanism. Totally decomposition of bioplastic was 530°C, then all of bioplastic was become the ash. The activation energy in the early and primary thermal decomposition stages are 1.27 kJ/moland 22.62 kJ/mol, respectively and heating valueof bioplastic is 15.16 MJ/kg.
THE EFFECT OF CHEMICAL PRETREATMENT PROCESS ON MECHANICAL PROPERTIES AND POROSITY OF CELLULOSE BACTERIAL FILM Sutrisno, Tito Arif; Suryanto, Heru; Wulandari, Retno; Muhajir, M.; Zahari, S.M.Shahrul N.S.
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 3, No 1 (2019)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1322.495 KB) | DOI: 10.17977/um016v3i12019p008

Abstract

Bacterial cellulose (BC) is a natural polymer which have superior properties, like high porosity, high purity, and high permeability. The study objective is to determine the influence of chemical pretreatment on tensile strength and the porosity of BC. The method was to make BC films from pineapple peel extract through fermentation process for 14 days. The pretreatment was conducted by immersion of BC in BmimCl, H2O2, and NaOH solution with a concentration of 2.5%; 5%; and 7.5 %, heated at 80 °C then dried in the oven, and the samples were then tested by a tensile test using ASTM-D636-V standard, morphology analysis using Scanning Electron Microscope, and porosity analysis. The results indicate that the tensile strength of control sample was 123 MPa, whereas after chemical pretreatment, the tensile strength was decreased with the greater reduction occurred using NaOH pretreatment compared than the other solutions that having a lower tensile strength of 8.54 MPa at 7.5 % of NaOH. The results of porosity show that the value increased after being treated chemically. The BC film porosity was 87.13% after  NaOH treatment of 7.5% while BC film untreated had porosity of 19.15%. This phenomenon was occurred due to the increasing pore, so the absorption of water increased.
PENERAPAN MESIN ROL PIPA HIDROLIS PADA BENGKEL MODIFIKASI KONSTRUKSI MOTOR TRAIL Suryanto, Heru; Aminnudin, Aminnudin; Aminnudin, Sukarni; Pradana, Yanuar. R. A.; Dharmabintara, Reddy .A.; Muhajir, Muhamad; Muslim, Fakris
Jurnal KARINOV Vol 1, No 3 (2018): September
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) Universitas Negeri Malang

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Abstract

Penggunaan sepeda motor trail saat ini mulai meningkat, namun untuk sepeda motor trail baru terkendala oleh harga yang cukup mahal sehingga banyak bermunculan bengkel modifikasi motor trail. Dalam melaksanakan proses modifikasi dibutuhkan mesin rol pipa untuk membentuk bengkokan pada frame bodi motor. Oleh karena itu, tujuan penulisan ini adalah memberikan pemaparan tentang desain dan manufaktur serta aplikasi mesin rol pipa pada UKM mitra dibidang modifikasi konstruksi frame motor trail. Metode pelaksanaan yang digunakan meliputi observasi dan wawancara tentang kendala proses rol, mendesain dan membuat mesin rol pipa serta menguji kualitas produk rol pipa dan membandingkan dengan mesin pipa lama yang dipakai. Hasil kegiatan telah menghasilkan mesin rol pipa dengan sistem penggerak hidrolis dengan daya maksimum mencapai 9 ton, dengan kapasitas diameter pipa yang di rol lebih besar yaitu kisaran 0,5-2 inchi. Keunggulan dari mesin yang dibuat adalah rentang aplikasi diameter pipa yang digunakan lebih besar, kebutuhan ruang kerja yang lebih kecil, kebutuhan tenaga lebih sedikit, penggunaan lebih nyaman dan aman, serta hasil yang diperoleh lebih presisi. ?Kata kunci? mesin rol pipa, konstruksi motor trail, hidrolis
PENINGKATAN KETRAMPILAN PENGOPERASIAN SOFTWARE CAD/CAM DAN MESIN 3D PRINTER PADA GURU SMK Bintara, Redyarsa Dharma; Suryanto, Heru; Aminnudin, Aminnudin; Pradana, Yanuar Rohmat Aji; Arbianto, Ferian Rizki
Jurnal Graha Pengabdian Vol 2, No 1 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) Universitas Negeri Malang

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Abstract

Abstrak: Kegiatan pengabdian ini bertujuan untuk meningkatkan ketrampilan para guru jurusan mesin Sekolah Menengah Kejuruan (SMK) se-Kota dan Kabupaten Blitar dalam bidang CAM. Meningkatnya kualitas guru diharapkan pula dapat menjadi bagian dari upaya menyiapkan  lulusan yang lebih kompestitif sebelum memasuki dunia kerja. Proses pelatihan dimulai dari penginstalan dan pengenalan software CAD dan CAM, pembuatan model 3D dan pencetakan model menjadi 3D fisik model. Hasil pelatihan menunjukan adanya peningkatan penguasaan software CAD, pengetahuan dan penguasaan software 3D Printing dan penggunaan mesin 3D Printer. Luaran yang meyertai dari kegiatan ini berupa penambahan modul pelatihan sebagai panduan belajarnya.Abstract: This service activity aims to improve the skills of teachers majoring in Vocational High School (SMK) machines in the City and District of Blitar in the field of CAM. Increasing the quality of teachers is also expected to be part of efforts to prepare graduates who are more competitive before entering the workforce. The training process begins with the installation and introduction of CAD and CAM software, the creation of 3D models and the printing of models into physical 3D models. The training results showed an increase in mastery of CAD software, knowledge and mastery of 3D Printing software and the use of 3D Printer machines. The output that follows from this activity is the addition of training modules as a study guide.
Struktur dan Sifat Mekanik Film Bacterial Cellulose dengan Disintegrasi Mekanis Muhajir, Muhamad; Suryanto, Heru; Larasati, Aisyah
JPSE (Journal of Physical Science and Engineering) Vol 3, No 2 (2018): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

Film structure was greatly affected to mechanical properties of Bacterial Cellulose (BC). An engineering effort on Bacterial Cellulose Fibers (BCF) structure was changing the size and distribution of BC fiber through mechanical disintegrator process using a High Speed Blender (HSB). This study aimed to show the effect of disintegrator to the structure and mechanical properties of BCF film. The method used in this study is a synthesis of BCF from fermentation from pineapple peel waste with incubation of Acetobacter xylinum (A. xylinum) for 14 days. BC pellicle was soaked by using 1% NaOH for 24 hours then distrusted using the HSB with code speed variation of L (18000 rpm), M (21000 rpm), and H (26000 rpm) for 5 min. Then film formed by a casting method and dried in the oven at a temperature of 60 °C for 8 hours. The study result showed that the morphology of BCF formed pores, the crystallinity decreased so the tensile strength was decreased by 94%. The results of this study are expected to provide engineering information on the BCF structure potentially for filters and for sensors. DOI: http://dx.doi.org/10.17977/um024v3i22018p055 
Pengaruh Perlakuan Alkali (NaOH) Terhadap Morfologi dan Kekuatan Tarik Serat Mendong Witono, Kris; Irawan, Yudy Surya; Soenoko, Rudy; Suryanto, Heru
Rekayasa Mesin Vol 4, No 3 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Chemical modification on fiber by using Natrium Hydroxide (NaOH) solution directly affect to the fiber structure such as changing the chemical composition of the fiber and improve the performance of natural fiber as the composite reinforcement. The purpose of this study is to inverstigate the effects of NaOH solution to the tensile strength and the mofology of Mendong fiber. The concentration of NaOH solution were 2,5% v/v; 5% v/v; dan 7,5% v/v on this experiment. Mendong fiber was soaked for 2, 4 and 6 hours in NaOH solution. The temperature on this study was 26 o C. The tensile strength of Mendong fiber was increased by increasing the NaOH solution concentration and duration of soaking after exceed the concentration of NaOH solution and duration of soaking the tensile strength would be decreased. The highest tensile strength was 497,34 MPa with NaOH solution concentration 5% v/v and the duration of soaking, 2 hours. The roughness of Mendong fiber by soaking in NaOH solution was higher than without soaking in NaOH solution. Soaking on the highest concentration of NaOH solution caused the highest roughness.Keywords: NaOH solution, Mendong fiber, tensile strength, roughness.