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All Journal Jurnal Rekayasa Proses Reaktor International Journal of Renewable Energy Development Eksergi: Chemical Engineering Journal Journal of Mathematical and Fundamental Sciences Journal of Engineering and Technological Sciences KOVALEN: Jurnal Riset Kimia Jurnal Fitofarmaka Indonesia Mesin Chemistry Indonesian Journal of Chemical Research CHEESA: Chemical Engineering Research Articles Jurnal Rekayasa Proses Jurnal Teknik Kimia Indonesia International Journal of Renewable Energy Development Jurnal Rekayasa Proses International Journal of Oil Palm
Johnner P Sitompul
Institut Teknologi Bandung
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Social Sciences

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Synthesis of Nanocomposite Materials for Biodegradable Food Packaging Johnner Parningotan Sitompul; Daru Setyawan; Aldhita Graffi Nabila; Vita Wonoputri; Hyung Woo Lee
International Journal of Oil Palm Vol. 2 No. 1 (2019): January 2019
Publisher : Indonesian Oil Palm Society /IOPS (Masyarakat Perkelapa-sawitan Indonesia /MAKSI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35876/ijop.v2i1.22

Abstract

This paper concerns on synthesis of nancomposite materials, based on poly(D,Llactic acid)/poly(L-lactic acid). The Poly(L,D-lactic acid) (PDLLA) was produced from L,Dlactic acid through direct polycondensation method and poly(L-lactic acid) (PLLA) derived from L-lactide through ring-opening polymerization method. The PDLLA/PLLA films were produced through solvent casting method. The ratio of PDLLA in the PDLLA/PLLA matrix was determined by adjusting PDLLA fraction. The nanoclay used in this experiment were natural clay (Bentonite) and modified organoclay with quaternary ammonium salt (Cloisite 30B). The PLA blend nanocomposites was produced through solution intercalation with sonication. To determine the effect of amounts of nanoclay and sonication period, these two variable were varied. To analyze chemical structure of PLA, the PLA blend film were tested using Fourier Transform Infrared (FTIR). The dispersion of nanoclay on the PLA blend matrix was analyzed using X-Ray Diffraction (XRD) test. The properties of PLA blend nanocomposites film were then characterized using Universal Testing Machine (UTM), Water Vapor Permeability (WVP) test and the enzymatic biodegradability test. The fraction of PDLLA on the PLA blend was fixed 70 % wt. XRD test showed exfoliation of Cloisite 30B in the PLA matrix while the Bentonite was exfoliated as well as intercalated. The addition of nanoclay improved the tensile strength of PLA blend nanocomposites polymer to the number of 56.26 MPa and 37.65 MPa, respectively. Sonication period of PDLLA/PLLA nanocomposite affected the mechanical properties, barrier properties and polymer biodegradability. Moreover, from the WVP test, the barrier properties of the blend polymers was improved and increased twice compared to that of the pure PDLLA/PLLA.
Produksi Asam Laktat Melalui Jalur Biologi dan Jalur Kimia Katalitik Menggunakan Berbagai Bahan Baku Aini, Apsari Puspita; Nurmalasari, Enny; Rasrendra, Carolus Borromeus; Sitompul, Johnner
Eksergi Vol 20 No 3 (2023)
Publisher : Prodi Teknik Kimia, Fakultas Teknik Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v20i3.9768

Abstract

Aplikasi asam laktat pada berbagai industri menarik minat para peneliti untuk memproduksi asam laktat melalui berbagai jalur reaksi. Perolehan isomer asam lakat yang lebih murni dibandingkan dengan jalur reaksi kimia katalitik menjadikan jalur biologi dengan fermentasi menjadi jalur reaksi yang banyak dipakai di industri. Berbagai mikroorganisme pada golongan Lactic Acid Bacteria telah digunakan untuk memproduksi asam laktat baik dalam skala laboratorium maupun skala industri. Berbagai bahan baku dapat dikonversi menjadi asam laktat seperti, dihidroksi aseton, gliseraldehid, piruvaldehid, xilosa, glukosa, fruktosa, sukrosa, selulosa, insulin, selobiosa, pati, levoglukosan dan lignoselulosa. Kemampuan katalis dalam metode kimiawi menarik banyak minat peneliti untuk mencari alternatif pembuatan asam laktat yang bisa mengkonversi gula menjadi asam laktat dengan waktu reaksi yang lebih singkat. Penggunaan berbagai katalis mulai dari katalis homogen dan heterogen terbukti dapat menghasilkan asam laktat dengan yield yang bervariasi. Katalis lanthanum triflate terlihat menghasilkan asam laktat dengan perolehan yang baik walaupun dari bahan baku lignoselulosa yang perlu perlakuan awal terlebih dahulu karena mempunyai senyawa lignin yang bisa menghalangi kerja katalis.Kata Kunci: asam laktat; kimia katalitik; fermentasi; lignoselulosa  ABSTRACT: The utilization of lactic acid for various applications encourages researchers to produce lactic acid by various reaction pathways. The yield of lactic acid isomer which is purer than the catalytic chemical reaction makes the biological pathway by fermentation widely used in industry. Various microorganisms in the Lactic Acid Bacteria categories have been used to produce lactic acid both on a laboratory and industrial scale. Various raw materials can be converted into lactic acid such as dihydroxy acetone, glyceraldehyde, pyruvaldehyde, xylose, glucose, fructose, sucrose, cellulose, insulin, cellobiose, starch, levoglucosan and lignocellulose. The ability of catalyst has attracted interest of researcher to find alternatives for making lactic acid that can convert sugar into lactic acid with a shorter reaction time. The use of various catalysts from homogeneous and heterogeneous catalysts has been proven to produce lactic acid with varying results. The lanthanum triflate catalyst proven to produce lactic acid with a high yield, even though it is from lignocellulosic raw materials that need pre-treatment to remove lignin compounds which can inhibit the performance of the catalyst.Keywords: lactic acid; chemical catalytic; fermentation;  lignocellulose  
Co-Authors . Widayat A.N. Istyami A.N. Istyami, A.N. A.R. Ryadin Agus Wanadri Agus Wanadri Ahn, Jung Oh Aini, Apsari Puspita Aldhita Graffi Nabila Ana Kemala Putri Jauhari Ana Kemala Putri Jauhari Angelica, Evelyn Annisa N. Shabrina Arry K. Rizky Asep Bayu Carolus Borromeus Rasrendra Carolus Borromeus Rasrendra Chrismono Himawan Daniel I. Simangunsong Daniel Prasetyo Daniel Prasetyo Daniel Prasetyo, Daniel Daru Setyawan Emanuella, Natasha Enny Nurmalasari Faiq I. Akhiroti Gun Gun Gumilar Gun Gun Gumilar Gusdinar, Tutus H. Rahman H.W. Lee H.W. Lee, H.W. Hamidah Rahman Hermawan Prajitno Hermawan Prajitno Hermawan Prajitno, Hermawan Hutapea, Try H. A. Hyung W. Lee Hyung Woo Lee Hyung Woo Lee Hyung Woo Lee Hyung Woo Lee Hyung Woo Lee Hyung Woo Lee Hyung Woo Lee Indra G. Pasaribu Insyani, Rizky Jung Oh Ahn Kusnandar Anggadiredja Lee, Hyung Woo Lee, Hyung Woo Mario C. Gultom Martha Situ Situmorang Matthew W. Chang Matthew W. Chang Megawati Zunita Michael D.M. Sitompul Permata A. Priyadi Prajitno, Hermawan Prasetyo, Daniel R. Muhtadi R. Muhtadi, R. Rasrendra, Carolus Borromeus Retno G. Dewi Retno G. Dewi Riadi, Indra Rizki Insyani Rizki Insyani Rizki Insyani Rizky Insyani Simangunsong, Daniel I. Tatang H. Soerawidjaja Tatang H. Soerawidjaja Tatang H. Soerawidjaja Tatang Hernas Soerawidjaja Tika Paramitha Tirto Prakoso Try H. A. Hutapea Tursino, Tursino Tutus Gusdinar Tutus Gusdinar Vita Wonoputri Vita Wonoputri Wanadri, Agus Widayat Widayat Yook Chan Kim Yook Chan Kim Yosandi Calimanto Yosandi Calimanto