Article Per Year (5 Year)
p-Index From 2019 - 2024
4.967
P-Index
This Author published in this journals
All Journal Jurnal Teknik Industri IPTEKMA Buletin Udayana Mengabdi JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Itepa : Jurnal Ilmu dan Teknologi Pangan Media Ilmiah Teknologi Pangan (Scientific Journal of Food Technology) agriTECH Jurnal Ilmiah Teknologi Pertanian Agrotechno CARADDE: Jurnal Pengabdian Kepada Masyarakat Agroindustrial Journal Journal of Fibers and Polymer Composites
Bambang Admadi Harsojuwono
Program Studi Teknologi Industri Pertanian, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Social Sciences

Published : 51 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 4 Documents
Search
Journal : Jurnal Ilmiah Teknologi Pertanian Agrotechno

 1 
Pengaruh Pengaruh Konsentrasi Polivinil Alkohol dan Lama Pengadukan Pada Proses Pemanasan terhadap Karakteristik Komposit Biotermoplastik Maizena dan Glukomanan Sando F. Limbong; Bambang Admadi Harsojuwono; Amna Hartiati
Jurnal Ilmiah Teknologi Pertanian Agrotechno Vol 7 No 1 (2022)
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITPA.2022.v07.i01.p05

Abstract

This study aims to determine the effect of the concentration of polyvinyl alcohol (PVA) and the stirring time on the heating process and their interactions on the characteristics of the cornstarch-glucomannan biothermoplastic composite and determine the concentration of polyvinyl alcohol (PVA) and the duration of stirring the heating process which produces the best biothermoplastic composite. This study used a factorial randomized experimental group design. The first factor is the concentration of polyvinyl alcohol which consists of 4 levels, namely 3,5%, 4%, 4,5%, and 5% (w/w). The second factor is the stirring time on the heating process which consists of 4 levels, namely 3, 4, 5, and 6 minutes. The variables observed in this study were tensile strength, elongation at break, elasticity, swelling, water vapor transmission rate, biodegradation, and functional group. The resulting data was analyzed and continued with Duncan's Multiple Range Test. The results showed that the concentration of polyvinyl alcohol (PVA) had a very significant effect on tensile strength, elongation at break, and elasticity, but had no significant effect on swelling, water vapor transmission rate, and biodegradation. While the stirring time on the heating process has a very significant effect on tensile strength, and elasticity, but has no significant effect on elongation at break, swelling, water vapor transmission rate, and biodegradation of biothermoplastic maizena-glucomannan. The interaction between treatments has no significant effect on the characteristics of biothermoplastic. The best biothermoplastic composites were composites with a polyvinyl alcohol concentration of 5% and a stirring time of 6 minutes with a tensile strength of 29,47 MPa, elongation at break of 10,99%, elasticity of 268,21 MPa, swelling of 65,02%, water vapor transmission rate of 1,05 g/m2.hour, and biodegradation rate for 6 days. The results of functional group analysis showed the presence of functional groups hydroxyl (O-H), carbonyl (C=O), C=C aromatic, carboxyl (C-O), and hydrocarbon -(CH2)n.
Karakteristik Komposit Bioplastik Dalam Variasi Rasio Pati Umbi Talas (Xanthosoma sagittifolium)-Kitosan Esmeralda Oktaviani Simarmata; Amna Hartiati; Bambang Admadi Harsojuwono
Jurnal Ilmiah Teknologi Pertanian Agrotechno Vol 5 No 2 (2020)
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITPA.2020.v05.i02.p05

Abstract

This research aims to know the effect of variations in the ratio of taro-chitosan tuber starch to the characteristics of bioplastic composites and determine the ratio of taro-chitosan tuber starch that produces the best bioplastic composites. This research uses a Factorial Randomized Block design with taro-chitosan tuber starch ratio variation factor in five level (40: 60%, 35: 65%, 30: 70%, 25: 75% and 20: 80%). The treatments which grouped into 3 based on the time of making bioplastics, so there are 15 experimental units. The observed variables which tensile strength, elongation at break, modulus young, swelling development, biodegradation and FTIR test. The obtained data were analyzed for diversity and continued with the Honestly Significant Difference test. The results showed that the variation of the taro-chitosan tuber starch ratio significantly affected the tensile strength, elongation at break, modulus young, and swelling development but did not significantly affected the biodegradation of the bioplastic composites of taro-chitosan tuber starch. Variation of taro-chitosan tuber starch ratio 35: 65% produces the best bioplastic composite characteristics with tensile strength values 3.15 MPa, elongation at break 21.33%, modulus young of 14.87 MPa, swelling development test 29.69% and biodagradation ability for 13 days. FTIR analysis results show the presence of hydroxyl (O-H) alcoholic groups, (O-H) Carboxylic acid, (C = O) esters, (C - H) alkana, (C=C) alkena , and hydrocarbons - (CH2) n.
Pengaruh Konsentrasi Asam Stearat dan Selulosa dari Limbah Padat Pengolahan Tapioka Terhadap Karakteristik Biokomposit Foam Tapioka dan Glukomanan Pupung Ferdiansyah; Bambang Admadi Harsojuwono; I Wayan Arnata
Jurnal Ilmiah Teknologi Pertanian Agrotechno Vol 7 No 2 (2022)
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITPA.2022.v07.i02.p04

Abstract

Abstract This study aims to determine the effect of the concentration of stearic acid and cellulose from tapioca processing solid waste on the characteristics of tapioca foam biocomposite and glucomannan and to determine the optimal concentration of stearic acid and cellulose from tapioca processing solid waste so as to produce the best characteristics of tapioca foam and glucomannan biocomposite. This study used a randomized block design with two factors. Factor I is the concentration of stearic acid which consists of 3 levels (2% ; 4% ; 6%). Factor II is the concentration of maleic anhydride which consists of 3 levels (2.5%; 5%; 7.5%). The variables observed were tensile strength/breaking stress (tensile strength), density (mass density), tear resistance, compression set, thickness, swelling, and biodegradation time. The data obtained were analyzed for diversity (ANOVA) and continued with Duncan's test using Microsoft Excel 2016. The results showed that the concentration of stearic acid had a very significant effect on tensile strength, tear resistance, compressibility, swelling, biodegradation, but had no significant effect on density and thickness. The concentration of cellulose has a very significant effect on tensile strength, tear resistance, compressibility, swelling, biodegradation and has a significant effect on thickness, but has no significant effect on density. The interactions have a very significant effect on tensile strength, tear resistance, permanent compression, swelling, biodegradation, but have no significant effect on density and thickness. Concentration of 6% stearic acid and 5% cellulose produced the best foam biocomposite with tensile strength value of 0.69 N/cm2, tear resistance 0.49 N/cm2, density 0.20 g/ml, constant compression 7.61%, thickness 10 .27 mm, swelling 0.55%, and degradation time for 13.67 days. Keywords: Biocomposite foam, tapioca, glucomannan, stearic acid, cellulose.
Pengaruh Konsentrasi Polivinil Alkohol dan Magnesium Stearat Terhadap Karaktersitik Bahan Pengemas Biokomposit Foam Tapioka-Glukomanan Shafira Salsabila Putri; Bambang Admadi Harsojuwono; Anak Agung Made Dewi Anggreni
Jurnal Ilmiah Teknologi Pertanian Agrotechno Vol 8 No 2 (2023)
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITPA/2023.v08.i02.p04

Abstract

Biokomposit foam tapioka glukomana masih memiliki kelemahan seperti hidrofilik dan memiliki sifat mekanik yang rendah. Penelitian ini bertujuan untuk mengetahui pengaruh konsentrasi polivinil alkohol dan magnesium stearat terhadap karakteristik biokomposit foam tapioka dan glukomanan serta menentukan konsentrasi polivinil alkohol dan magnesium stearat yang optimal sehingga dihasilkan karakteristik biokomposit foam tapioka dan glukomanan yang terbaik. Penelitian ini menggunakan rancangan acak kelompok dengan dua faktor. Faktor I adalah konsentrasi polivinil alkohol yang terdiri atas 3 taraf yaitu 20, 30, 40%. Faktor II adalah konsentrasi magnesium stearat yang terdiri atas 3 taraf yaitu 10, 15, 20%. Variabel yang diamati yaitu kuat tarik/tegangan putus, densitas, ketahanan sobek, pampat tetap, ketebalan, pengembangan tebal dan waktu biodegradasi. Data yang diperoleh dianalisis keragamannya dan dilanjutkan dengan uji Duncan. Hasil penelitian menunjukan konsentrasi polivnil alkohol dan magnesium stearat berpengaruh sangat nyata terhadap kuat tarik, ketahanan sobek, pampat tetap, swelling, biodegradasi, tetapi tidak berpengaruh nyata terhadap densitas dan ketebalan. Interaksi antar perlakuan berpengaruh sangat nyata terhadap kuat tarik, ketahan sobek, pampat tetap dan, biodegradasi, tetapi tidak berpengaruh nyata terhadap densitas, ketebalan, swelling, dan waktu biodegradasi. Konsentrasi polivinil alkohol 40 % dan magnesium stearat 20% menghasilkan biokomposit foam terbaik dengan nilai kuat tarik 2,10 N/cm2, ketahanan sobek 1,50 N/cm2, analisis densitas 0,40 g/ml, pampat tetap 2,89%, ketebalan 3,59 mm, swelling 0,61%, dan waktu degradasi selama 17,33 hari.
Co-Authors Aditya Nandika A.J Amna Hartiati Anak Agung Made Dewi Anggreni Anak Agung Made Dewi Anggreni Aryawan, I Komang Budi Mas Boy Darwin Situmorang Cintia Indrawati Devi Hagelia Aritonang Dewa Made Dwi Pradana Putra Dewi Sartika Esmeralda Oktaviani Simarmata Farida Unggul Situmorang Fransiskus Yuven Wara Gusti Ayu Kadek Diah Puspawati I Dewa Gde Mayun Permana I Gusti Ayu Lani Triani I Gusti Made Teddy Pradana I Gusti Ngurah Agung I Kadek Alit Susendiana Adi I Ketut Pramananta I Ketut Satriawan I Ketut Suter I Made Prahadi Widnata Putra I Made Sugitha I Nengah Kencana Putra I Pt Cahya Wisnawa P I W.G. SEDANA YOGA I Wayan Angga Sukma I Wayan Arnata Ida Bagus Wayan Gunam Ketut Anik Mas Juliani Liza Natasya Pongmassangka Luh Gede Arista Pradnyani M. Surya Pramana Mahardika M. SURYA PRAMANA MAHARDIKA, M. SURYA Mulyani Sri N.L. Yulianti Nairfana, Ihlana Natasya Damariandini Ni Kadek Ariani Dewi Ni Kadek Sriani Ni Ketut Wiradnyani Ni Luh Feby Putri Pratami Ni Made Wartini Ni Putu Suwariani Ni Wayan Nadia Martaningsih Sutarsa Noval Wahyu Adi NYOMAN SEMADI ANTARA Pande Made Kerta Indra Yoga Pupung Ferdiansyah Purba, Dillon Marichman Putu Devi Yustisia Utami Radja Zulfan Hasibuan Runa Ramadanty Aisyi Putri Sando F. Limbong Sayi Hatiningsih Shafira Salsabila Putri Sri Mulyani Sri Mulyani Syah Banu Putra Sitepu Tiara Noviyani Timothy Ich Sudanton Sitorus Viva Yani Tika Rutmana Simamora Vudia Miranda Wijaya Saputra Yohana Putri Lumbantoruan