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All Journal Seminar Nasional Teknik Kimia Kejuangan PROSIDING SENATEK FAKULTAS TEKNIK UMP JPM (Jurnal Pemberdayaan Masyarakat) ASEAN Journal of Chemical Engineering Equilibrium Journal of Chemical Engineering Jurnal Teknik Kimia Indonesia
Fadilah Fadilah
Chemical Engineering Department, Faculty Of Engineering, Universitas Sebelas Maret, Surakarta, 57128, Indonesia
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Social Sciences Other

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SINTESIS HIDROGEL DARI GLUKOMANNAN UMBI PORANG (Amorphophallus muelleriblume) DENGAN METODE DEASETILASI SEBAGAI SUPER ABSORBEN POLIMER Prasetya, Kukuh Eka; Nurgirisia, Novesa; Fadilah, Fadilah
PROSIDING SENATEK FAKULTAS TEKNIK UMP 2015: PROSIDING SENATEK TAHUN 2015, 28 November 2015
Publisher : PROSIDING SENATEK FAKULTAS TEKNIK UMP

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Abstract

Glukomanan merupakan suatu bahan baku alternatif untuk bahan dasar hidrogel yang biasanya dibuat dari turunan minyak bumi. Sumber glukomanan dapat diperoleh dari umbi porang yang tersedia melimpah di Indonesia. Salah satu metode pembuatan hidrogel adalah dengan deasetilasi glukomanan. Penelitian ini bertujuan untuk mengetahui pengaruh konsentrasi NaOH dan rasio tepung porang murni dengan volume larutan NaOH terhadap daya gembung (swelling) hidrogel. Tahapan penelitian terdiri dari pembuatan tepung porang, pemurnian tepung porang, deasetilasi, dan analisis daya swelling hidrogel. Konsentrasi NaOH untuk penelitian ini yaitu 0,01;0,1; dan 1 M, dan variasi rasio tepung porang murni dengan volume larutan NaOH yaitu 0,01 gram/mL; 0,02 gram/mL; 0,03 gram/mL; dan 0,05 gram/mL. Dari hasil penelitian diperoleh daya swelling maksimum hidrogel didapat sebesar 1162,17% pada rasio 0,03 gram/mL dan konsentrasi NaOH 0,01 M. Pengaruh konsentrasi NaOH terhadap daya swelling didapatkan semakin besar konsentrasi larutan NaOH maka daya swelling semakin kecil, sementara daya swelling pada berbagai rasio massa tepung terhadap volume larutan pada berbagai konsentrasi NaOH memiliki kecenderungan yang sama Kata kunci: deasetilasi, glukomanan, hidrogel, larutan NaOH
STUDI PEMBUATAN DAN KARAKTERISTIK SIFAT MEKANIK EDIBLE FILM BERBAHAN DASAR UMBI SUWEG (Amorphophallus campanulatus) DENGAN PEWARNA DAN RASA SECANG Febianti, Fitri; Agline, Heni Tri; Fadilah, Fadilah
PROSIDING SENATEK FAKULTAS TEKNIK UMP 2015: PROSIDING SENATEK TAHUN 2015, 28 November 2015
Publisher : PROSIDING SENATEK FAKULTAS TEKNIK UMP

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Abstract

 Bahan pengemas plastik yang beredar di masyarakat sulit untuk didegradasi oleh alam. Edible film dari pati umbi suweg dengan pewarna dan rasa secang sangat memungkinkan untuk meminimalisir pencemaran lingkungan, mengoptimalkan pemanfaatan umbi suweg, serta pemanfaatan secang sebagai pewarna sekaligus perisa. Tujuan penelitian ini mengetahui pengaruh penambahan ekstrak secang dan berat pati terhadap sifat mekanik edible film yang dihasilkan. Edible film dibuat dengan cara menambahkan sejumlah pati kedalam campuran air dan ekstrak secang bersuhu 70 0C dan dilakukan pengadukan selama 15 menit dengan menjaga suhu konstan pada 70 0C . Pati yang ditambahkan bervariasi 3, 4, 5, 6 dan 7 gram dalam 100 ml campuran air dan ekstrak secang. Ekstrak secang yang ditambahkan bervariasi 2,3,4,5, dan 6 ml dalam setiap 100 ml campuran. Selanjutnya larutan ditambah plasticizer gliserol sebanyak 20% (b/b pati). Larutan edible film dicetak dengan menggunakan teflon, dioven pada suhu 600C selama 8 -12 jam, dan didinginkan. Edible Film selanjutnya diuji sifat mekaniknya yaitu kuat tarik, modulus elastisitas, dan elongasi menggunakan Universal Testing Machine (UTM). Hasil penelitian didapat kekuatan tarik dan modulus elastisitas tertinggi dimiliki oleh komposisi 7 gram 4 ml ekstrak yaitu 30.73 Pa dan  422.42 Pa, sedangkan elongasi sebesar 10.63 % pada komposisi 6 gram 6 ml.Kata kunci: Edible Film, Karakteristik Sifat Mekanik, Umbi Suweg, Secang,
Matriks Pengontrol Pelepasan Urea Berbasis Karagenan: Pengaruh Konsentrasi Glutaraldehid Sperisa Distantina; Mujtahid Kaavessina; Fadilah Fadilah
Jurnal Teknik Kimia Indonesia Vol 18, No 1 (2019)
Publisher : ASOSIASI PENDIDIKAN TINGGI TEKNIK KIMIA INDONESIA (APTEKIM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jtki.2019.18.1.3

Abstract

Abstrak. Pada penelitian ini, matrik hidrogel berbasis karagenan dibuat dan diaplikasikan untuk mengontrol pelepasan urea. Tujuan penelitian ini adalah mempelajari pengaruh konsentrasi glutaraldehid terhadap kecepatan pelepasan urea dan menyusun model kecepatan pelepasan urea. Film karagenan dimodifikasi secara kimiawi menggunakan ikatan silang atau crosslinking dengan glutaraldehid. Larutan karagenan 7 g/100 mL dicetak menjadi lembaran dan kemudian dikeringkan sehingga diperoleh lapisan film. Film direndam dalam larutan glutaraldehid dengan konsentrasi tertentu selama 2 menit dan dilanjutkan dipanaskan pada suhu 110oC selama 20 menit. Film yang dihasilkan dicuci dengan etanol dan dikeringkan. Pengisian urea ke dalam matrik film menggunakan metode difusi. Film kering direndam dalam larutan urea 0,074 g/mL selama satu jam dan selanjutnya dikeringkan. Kecepatan pelepasan urea dari film ke dalam media air dievaluasi berdasarkan data konsentrasi urea dalam cairan sebagai fungsi waktu. Berdasarkan hasil penelitian didapatkan bahwa semakin besar konsentrasi glutaraldehid (1-5%) menyebabkan urea yang tersimpan di dalam film semakin rendah. Model matematika yang diusulkan dapat mewakili peristiwa pelepasan urea dari film. Film berbasis karagenan yang dihasilkan berpotensi sebagai matrik pengontrol pelepasan urea. Kata kunci: crosslinking, glutaraldehid, hidrogel, karagenan, urea. Abstract. Controlled Release Matrices of Urea from Carrageenan: Effect of Glutaraldehyde Concentration. In this study, carrageenan-based hydrogel matrices were prepared and applied for urea controlled release. The aim of this work was to study the effect of glutaraldehyde concentration on the rate of urea release in water. Carrageenan films were chemically modified by crosslinking with glutaraldehyde. The films were prepared by casting the aqueous carrageenan 7 g/100 mL and then followed by drying. The films obtained were immersed in certain glutaraldehyde concentration for 2 min and then heated in the oven at 110oC for 20 min. The crosslinked films were washed using ethanol and then air-dried until the weight is constant. The dried films were immersed in a urea solution (0.074g/ml) for 1 hr and then dried. The rate of urea release was determined by measuring the urea concentration in water as a function of time of release. Results showed that higher glutaraldehyde concentration (1–5%) produced films with less urea content. The proposed mathematic model of urea release from the film can represent the rate of urea release. The prepared carrageenan-based film has the potential for controlling of urea release. Keywords: carrageenan, crosslinking, glutaraldehyde, hydrogel, urea. Graphical Abstract
Photo-Oxidative Degradation and Hydrolytic Degradation of Micro-Graphite Filled Poly(lactic acid) Composites Mujtahid Kaavessina; Esa Nur Shohih; Sperisa Distantina; Fadilah Fadilah
ASEAN Journal of Chemical Engineering Vol 22, No 1 (2022)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.70871

Abstract

In a specific range of electrical conductivity, poly(lactic acid)/PLA has the potential to be developed into environmentally friendly antistatic packaging after a modification process. PLA was blended in a mini single screw extruder at 180oC with different compositions of micro-graphite (0, 0.5, 1, and 1.5 %wt.). This report discusses the degradability of PLA composite, i.e., photo-oxidative degradation and hydrolytic degradation. The weight loss, thermal properties, and cross-section morphology of the tested specimens were monitored periodically. During the degradation test, micro-graphite could be released from the composite, leaving a rough surface and reducing the weight of the composite. Differential scanning calorimetry (DSC) test exhibited that the presence of micro-graphite did not influence the melting temperature of the composition studied. However, the onset temperature of the melting point showed a slight shift of about 2-4oC. Bulk crystallinity demonstrated a considerable dependence on the micro-graphite loading (0-1.5%wt). However, there were two contradictory phenomena after both degradation tests. UV exposure could stimulate the fragmentation of PLA chains, break the crystal structure and increase the embrittlement. Thus, crystallinity tended to decrease during photo-oxidative degradation. In hydrolytic degradation, degradation firstly occurred in the amorphous regions and was ongoing within the studied range of time (0-20 weeks). Thus, the bulk crystallinity of composite tended to increase.
Biodegradable Wet Wipes dari Sabut Kelapa Sawit (Palm Fiber) dengan Ekstrak Flavonoid Daun Kelapa Sawit Sebagai Bahan Antibakteri Fadilah, Fadilah; Ningtyas, Divanda Sekar Rahayu; Dewi, Audrey Vista Candra; Krisnawati, Anita Budi; Putra, Reyza Fachrezy
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

The wet tissue currently circulating in the market is made of synthetic fibers consisting of 30% viscose fibers and 70% polyester fibers, and 90% of the wet tissue contains plastic. Indonesia's palm oil industry grows annually, however. Palm fiber waste has high cellulose, useful as wet tissue raw material substitute. This study used flavonoids from palm leaves as an antibacterial material to create biodegradable wet wipes from palm fiber and evaluate their antibacterial and antiseptic effectiveness. The best characteristics of biodegradable wet wipes are obtained with a composition of 91.5% (w/w) palm coconut fiber cellulose, and a ratio (w/w) of PVA:tapioca:chitosan at every 10 mL of used VCO of 2:3:6 (1.5%:2.25%:4.5%) with variations in pulp bleaching and the method of applying the binder solution by being spread onto semi-dry tissue paper. The evaluation of wet tissue includes tests for tensile strength, color, biodegradability, phytochemical analysis, antibacterial testing, antiseptic testing, irritation testing, and pH testing. The test results showed that biodegradable wet wipes made of palm coconut fiber and flavonoid extract from palm coconut leaf at concentrations of 10%, 15%, and 20%, which have been adjusted to SNI 8526:2018 standard, have bacterial reduction effectiveness of 68.09%, 79.06%, and 89.94%, respectively.
Effect of Potassium Peroxodisulphate and Microwave Power on Hydrogel Character Based on Banana Peel Waste Using Microwave Grafting Method Distantina, Sperisa; Anggreini, Ghea Safiraventa; Al Kamal, Fahrul An'nas; Kaavessina, Mujtahid; Fadilah, Fadilah
Equilibrium Journal of Chemical Engineering Vol 7, No 1 (2023): Volume 7, No 1 July 2023
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v7i1.67919

Abstract

ABSTRACT. Musa paradisiaca var. raja peel waste contains cellulose which has the potential to be a raw material for synthesizing hydrogels. This research utilizes acrylamide monomer grafted onto banana peel cellulose backbone using the microwave grafting method to produce hydrogel. The banana peel waste was dried to a constant weight and then crushed into powder. Banana peel powder was through a delignification process with the addition of NaOH and bleached with NaClO to took only the cellulose of the banana peel. The mixture of banana peel cellulose-acrylamide-potassium peroxodisulfate powder through the grafting process was repeated with variations in KPS concentration and microwave power. The reaction was terminated with a hydroquinone solution, washed with acetone, and then precipitated. The precipitated solid was dried to a powder called cellulose-g-PAAM. A homogeneous solution of 2% carrageenan-cellulose-g-PAAM underwent a physical crosslinking process using KCl and CaCl2 solutions after passing through palm oil to form a bead gel. The purpose of this research was to determine the effect of potassium peroxodisulfate (KPS) initiator concentration and microwave power on the swelling capacity in water. The properties of obtained dried bead gels were characterized their functional groups using FTIR and swelling capacity test in water. From this research, it can be concluded that banana peel cellulose was successfully grafted onto acrylamide monomer as evidenced by the FTIR test results. The lower KPS concentration is the greater on the swelling capacity and the microwave power has no effect on the swelling capacity of bead gels.Keywords: Banana peel, Bead gel, Microwave, Swelling degree 
Effect of Acrylamide And Potassium Peroxodisulphate on The Quality of Bead Gel Based on Cassava Bagasse-Carrageenan Using Microwave Grafting Method Distantina, Sperisa; Hidayatun, Nurul; Nabila, Shifa Annisa; Kaavessina, Mujtahid; Fadilah, Fadilah
Equilibrium Journal of Chemical Engineering Vol 6, No 2 (2022): Volume 6, No 2 December 2022
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v6i2.68130

Abstract

ABSTRACT. Hydrogels are widely used for drug delivery systems, immuno-chemotherapy applications, efficient use of water, preventing dry soil, and increasing soil infiltration. Generally, hydrogels are derived from synthetic polymers which is non-biodegradable and toxic. Cassava bagasse is an alternative cellulose to make hydrogels. The purpose of this research was to determine the effect of the amount of acrylamide and potassium peroxodisulphate (KPS) initiator on the quality of bead gel based on cassava bagasse-carrageenan. Chemical structure of the hydrogel was studied using FTIR spectroscopy. Cassava bagasse was immersed in a solution of n-hexane to separate the fat. Then, fat-free cassava bagasse was grafted with mass ratios of cassava and acrylamide 1:5, 1:10, and 1:15 in 110 mL water. The solution was added with a KPS initiator with weight variations (g) 0.04; 0.08; 0.12 then stirred 15 min. The solution was put in the microwave with 630 watts of irradiation for 450 s with the cooling cycle temperature maintained at 65-70oC. The aqueous of grafted polymer and carrageenan was injected into beaker glass that contained 1 cm of palm oil and mixture of 0.2 M CaCl2 and 0.2 M KCl in an ice bath. Results showed that the highest average swelling capacity was found in the bead gel variation 1:15 with the number of initiators 0.04 g of 1797.95% at a time of 210 minutes of immersion. From FTIR spectrum, it was found that there was a success in grafting acrylamide into bagasse’s backbone using the microwave grafting method with KPS as initiator.Keywords: Acrylamide, Bead Gel, Cassava Bagasse, Grafting Microwave, Potassium Peroxodisulphate
Microencapsulation of Garlic Oil with Gelatin and Maltodextrin Encapsulant Using the Coacervation Method Fitriyani, Elisa; Damayantia, Anastasia Devina; Ruwaidaha, Listia Aulia; Nabila, Shifa Annisa; Fadilah, Fadilah
Equilibrium Journal of Chemical Engineering Vol 7, No 1 (2023): Volume 7, No 1 July 2023
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v7i1.64248

Abstract

ABSTRACT.  Garlic Oil is widely used as a raw material for fragrances with volatile active compounds at room temperature. It is easily affected by environmental changes and this problem can be solved by microencapsulation using coacervation methods to protect active compounds. Garlic Oil was encapsulated using gelatin and sodium alginate as coating materia with glutaraldehyde as the crosslinking agent. The purpose of this research was to study the effect of the composition of polymers and the mass of garlic oil on encapsulation characteristics. The resulting microcapsules were analyzed using a digital microscope, SEM, FTIR, and encapsulation efficiency. The result showed that microcapsules have an irregular shape with a textured surface. The FTIR spectrum showed an indication of garlic oil with allicin content in microcapsules. The encapsulation efficiency is  34.23%  with a yield of 29.43%.Keywords: microencapsulation, coacervation, garlic oil
Pemanfaatan Cangkang Biji Nyamplung sebagai Penghasil Resin untuk Mengatasi Permasalahan Limbah Padat di CV Plantanesia Setyawardhani, Dwi Ardiana; Kaavessina, Mujtahid; Fadilah, Fadilah; Distantina, Sperisa; Kwartiningsih, Endang; Danarto, Yoseph Calasanctius; Ramadhani, Aida Nur
Equilibrium Journal of Chemical Engineering Vol 6, No 2 (2022): Volume 6, No 2 December 2022
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v6i2.66463

Abstract

ABSTRAK. CV Plantanesia merupakan industri penghasil minyak dari biji nyamplung (Calophyllum inophyllum) yang dikenal sebagai Tamanu oil. Minyak tersebut dijual sebagai bahan baku kosmetik untuk produk skin care dan obat tradisional seperti luka, penyakit kulit, rematik, minyak untuk urut maupun obat gatal. Produksi Tamanu oil menghasilkan limbah hasil pengepresan minyak dari bijinya yang berupa bungkil/ampas biji dan cangkang/kulit buah nyamplung. Limbah tersebut dihasilkan dalam jumlah besar dan belum dimanfaatkan sehingga hanya dibuang sebagai sampah dan dibakar. Cangkang biji nyamplung mengandung resin senyawa fenolik yang memiliki sifat antioksidan, anti inflamasi, anti kanker, dan anti mikroba sehingga dapat dimanfaatkan untuk pengobatan Tujuan pengabdian pada masyarakat ini adalah memberikan pelatihan pengolahan limbah pengepresan minyak biji nyamplung, khususnya cangkang biji dan pengolahannya untuk menjadi resin. Kegiatan ini dilakukan di CV. Plantanesia yang berlokasi di Tasikmadu, Kecamatan Jaten, Kabupaten Karanganyar. Pelatihan diberikan dalam bentuk penyuluhan, diskusi dan pelatihan pengambilan (ekstraksi) resin dari cangkang nyamplung. Proses ekstraksi resin dari cangkang nyamplung dan pengaturan kondisi optimal ekstraksi dilakukan terlebih dahulu melalui percobaan pendahuluan di Laboratorium Program Studi Teknik Kimia FT UNS. Hasil percobaan tersebut digunakan sebagai materi pelatihan. Penyampaian materi dilakukan melalui kunjungan, penyuluhan dan pelatihan pada pelaku usaha khususnya CV Plantanesia. Materi penyuluhan dikemas dalam modul dan dipraktekkan secara langsung di lokasi CV. Dari kegiatan ini, mitra memperoleh peningkatan wawasan akan pemanfaatan cangkang biji nyamplung. Produk resin yang dihasilkan diharapkan dapat bermanfaat sebagai produk samping yang bernilai jual tinggi untuk meningkatkan pendapatan bagi pelaku usaha, sekaligus dapat mengatasi masalah limbahnya. Kata kunci: cangkang biji nyamplung, resin, tamanu oilABSTRACT. CV Plantanesia is a home industry that produces nyamplung (Calophyllum inophyllum) seed oil known as Tamanu oil. The oil is usually used for skin care products and traditional medicines such as wounds, skin diseases, rheumatism, massage oil and itching medicine. Tamanu oil production leaves solid waste from the pressing process, which is cake/seed dregs and shells/skin of nyamplung fruit. This waste is generated in large quantities and has not been utilized, so it is only disposed of as garbage or just burned. Nyamplung seed shells contain resin phenolic compounds which is used as antioxidant, anti-inflammatory, anti-cancer and anti-microbial properties. It can be used for medical treatment. This project aims to provide training on processing waste nyamplung seed oil, especially the seed shells and their processing to become resin. This activity is carried out at CV. Plantanesia which is located in Tasikmadu, Jaten, Karanganyar. The project was implemented in various activities, such as counseling, focus group discussions and workshop for extracting resin from nyamplung shells. The resin extraction and optimization process condition were developed at the Chemical Engineering Laboratory, Faculty of Engineering, Sebelas Maret University. The experimental results are implemented in the workshop at the industry. From this activity, partners gain increased insight into the use of nyamplung seed shells. The resin product is expected to be useful as a high value by-product to increase the benefit of the industry, as well as to overcome the waste problem.Keywords: nyamplung seed shell, resin, tamanu oil
Isotherm Adsorbsi Uap Air Komposit Poli(asam laktat) - Grafit Fadilah, Fadilah; Kaavessina, Mujtahid; Distantina, Sperisa; Setyawhardani, Dwi Ardiana; Kwartiningsih, Endang; Ramadhani, Aida Nur; Fakhruddin, Isa; Tane, Amaldo Firjarahadi
Equilibrium Journal of Chemical Engineering Vol 6, No 1 (2022): Volume 6, No 1 July 2022
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v6i1.58786

Abstract

ABSTRAK. Poli asam laktat adalah polimer hidrofobik yang termasuk dalam kelas biomaterial yang bersifat biodegradable. Poli asam laktat berpotensi untuk dijadikan komposit polimer konduktif (conductive polymer composite - CPC) yang dipergunakan sebagai bahan semikonduktor dengan cara mencampurkan grafit kepadanya. Perilaku adsorpsi uap air perlu dipelajari untuk mengetahui stabilitas komposit dan ditunjukkan melalui kurva isotherm adsorpsi uap air. Tujuan dari penelitian ini adalah mempelajari isotherm adsorpsi uap air komposit poli asam laktat/grafit pada berbagai komposisi grafit. Pengamatan terhadap isotherm adsorpsi uap air dilakukan dengan metode gravimetri pada berbagai kondisi kelembaban relatif. Hasil yang diperoleh menunjukkan bahwa kurva isotherm mengikuti tipe II menurut kasifikasi Brunauer, yaitu kurva berbentuk sigmoidal.  Semakin tinggi kondisi kelembaban relatif, semakin besar kandungan air kesetimbangan. Peningkatan kandungan air kesetimbangan secara tajam terjadi pada kondisi kelembaban di atas 75%.  Semakin tinggi komposisi grafit, semakin besar kandungan uap air kesetimbangan. Data kesetimbangan dicocokkan dengan model kesetimbangan sorpsi uap air yaitu model Guggenhiem-Anderson-deBoer (GAB), model Peleg, dan model Oswin. Model GAB memberikan gambaran isotherm yang terbaik.Kata kunci: Adsorpsi Uap Air, Kesetimbangan, Komposit, Poli Asam Laktat/Grafit, Pemodelan  ABSTRACT. Poly(lactic acid)/PLA is a hydrophobic polymer that belongs to the class of biodegradable biomaterial. PLA can be used as material in the manufacture of conductive polymer composite (CPC), which is used as a semiconductor material by mixing graphite into it. The water vapor adsorption behavior needs to be studied to determine the stability of the composite. This research aims to investigate the water vapor adsorption isotherm in poly(lactic acid)/graphite composites on various graphite compositions. The gravimetric method carried observations on the water vapor adsorption isotherm at various relative humidity conditions. The results obtained indicate that the isotherm curve follows type II according to the Brunauer classification. The higher the relative humidity, the greater the equilibrium water content. A sharp increase in the equilibrium water content occurs at humidity conditions above 75%. The higher the graphite composition, the greater the equilibrium moisture content. The Guggenhiem-Anderson-deBoer (GAB), Peleg, and Oswin sorption models were used to fit the experimental data. The GAB model best described the isotherms of the composites.Keywords: Composite, Equilibrium, Modeling, Poly(lactic acid)/Graphite, Water Vapor Adsorption
Co-Authors Al Kamal, Fahrul An'nas Anggreini, Ghea Safiraventa Ari Diana Susanti Damayantia, Anastasia Devina Danarto, Yoseph Calasanctius Dewi, Audrey Vista Candra Dwi Ardiana Setyawardhani, Dwi Ardiana Endang Kwartiningsih Esa Nur Shohih Fakhruddin, Isa Fitri Febianti, Fitri Fitriyani, Elisa Heni Tri Agline, Heni Tri Krisnawati, Anita Budi Kukuh Eka Prasetya, Kukuh Eka Kusuma, Viona Rohmah Armia Gita Muhammad Cahyadi Mujtahid Kaavessina Mujtahid Kaavessina Mujtahid Kaavessina, Mujtahid Nabila, Shifa Annisa Ningtyas, Divanda Sekar Rahayu Novesa Nurgirisia, Novesa Novita Novita Nur Rahtiwi Anjarni Nurul Hidayatun Paryanto Paryanto Putra, Reyza Fachrezy Rahman, Halimah Madania Ramadhani, Aida Nur Ruwaidaha, Listia Aulia Setyawhardani, Dwi Ardiana Shidiq Trianto Sperisa Distantina Sperisa Distantina Sperisa Distantina Syahputraningrat, Gemilang Ramadhan Tane, Amaldo Firjarahadi Tri Nova Prakoso