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Jurnal Sains dan Teknologi Reaksi
Published by Politeknik Negeri Lhokseumawe
ISSN : 1693248X     EISSN : 25491202     DOI : http://dx.doi.org/10.30811/jstr
Core Subject : Science, Education, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering Materials Science & Nanotechnology
Jurnal Sains dan Teknologi Reaksi atau boleh disingkat dengan nama JSTR, berfokus pada banyak Aspek Teknik Kimia, seperti: Teknik Reaksi Kimia, Teknik Kimia Lingkungan, Energi Fosil dan Terbarukan, serta Sintesis dan Pengolahan Material.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 331 Documents
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APPLICATION OF KAOLIN-ZEOLITE CERAMIC FILTER MEMBRANE IN RECOVERING WASTE OIL INTO USABLE OIL Zaky, Muhammad; Putra, Alfian; Rahmawati, Cut Aja
Jurnal Sains dan Teknologi Reaksi Vol 23, No 02 (2025): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v23i02.8861

Abstract

Several membrane materials are continuously being developed to produce efficient and environmentally friendly filtration media. This study examines the application of kaolin-zeolite-based ceramic filter membranes in the process of refining used cooking oil into usable oil. The main materials used are kaolin, zeolite, and PVA as a binder. The variations in the kaolin:zeolite composition used are 50%:50%, 60%:40%, 70%:30%, 80%:20%, and 100%:0% with sintering times of 1, 2, and 3 hours at a temperature of 1000°C. Membrane characterization includes density, porosity, flux, morphology tests using a Scanning Electron Microscope (SEM), as well as the removal of Free Fatty Acids (FFA) in used cooking oil. The results showed that the composition of 50% kaolin and 50% zeolite with a sintering time of 3 hours produced the best performance with a density of 1.32 g/cm³, porosity of 56.00%, flux of 143.93 L/m².hour, and the removal capacity of ALB up to 70.6%, reducing the ALB content from 4.56% to 1.34% according to SNI standards. SEM analysis showed a macroporous structure (0.57–3.02 µm) that supports filtration, while the adsorptive properties of zeolite play a role in reducing polar compounds. These results prove that kaolin-zeolite ceramic membranes have the potential as an alternative technology in used cooking oil recovery. Keywords: Ceramic Membrane, Kaolin, Zeolite, Sintering, Flux, Free Fatty Acid, SEM.
FORMULATION OF SHAMPOO BAR USING ACTIVE INGREDIENTS OF CANDLENUT OIL (ALEURITES MOLUCCANUS L) AND STEARIC ACID Fayza, Nina; Suryani, S; Elfiana, E; Fitria, F
Jurnal Sains dan Teknologi Reaksi Vol 23, No 02 (2025): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v23i02.8867

Abstract

This study aimed to evaluate the effect of candlenut oil (Aleurites moluccanus L) and stearic acid ratios, along with mixing temperatures, on the quality of shampoo bars. A total of 25 formulations were prepared using five ratios of candlenut oil to stearic acid (6:30%, 11:25%, 16:20%, 21:15%, and 26:10%) and five mixing temperatures (70 oC, 75oC, 80oC, 85oC, and 90oC). Constant ingredients included sodium cocoyl isethionate 41%, methyl ester sulfonate 13%, cetyl alcohol 5%, cocoa butter 1.9%, essential oil 1%, citric acid 0.1%, lexgard natural 1%, and colorant 1%. Quality evaluation referred to SNI 06-2692-1992 standards, covering pH, moisture content, foam stability, antibacterial activity, and organoleptic properties (color, aroma, texture). Results indicated that both the oil–acid ratio and mixing temperature significantly affected shampoo bar characteristics. The optimal formulation was obtained at a candlenut oil to stearic acid ratio of 6:30% with a mixing temperature of 70℃. This formula produced a pH of 6.47, stable foam with only 2.77% loss, low moisture content of 1.87%, and antibacterial activity of 100%. Organoleptic evaluation also showed high panelist acceptance for its color, aroma, and texture, indicating good consumer preference and product stability. Keywords: Shampoo Bar, Candlenut Oil, Stearic Acid, Mixing Temperature, Antibacterial
THE INFLUENCE OF GLYCEROL ADDITION AND THERMAL TREATMENT DURATION ON THE CHARACTERISTICS OF EDIBLE FILM BASED ON KOLANG-KALING (Arenga pinnata) Tunnisa, Haura; Syafruddin, S; Nanda, Satria
Jurnal Sains dan Teknologi Reaksi Vol 23, No 02 (2025): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v23i02.8859

Abstract

Research on the production of edible film from kolang-kaling with variations in glycerol addition and heating duration has been conducted with glycerol concentrations of 0; 0.5; 1; 1.5; and 2 mL, and heating times of 5, 10, 15, 20, and 25 minutes at a temperature of 70°C. This study aims to determine the effect of glycerol addition and heating duration on the characteristics of kolang-kaling edible film with the addition of Carboxymethyl Cellulose (CMC). The results showed that the best characteristics were obtained with the addition of 1 mL of glycerol with a heating time of 20 minutes, resulting in a film thickness of 0.053 mm, WVTR of 3.4632 g/m²/day, tensile strength of 14.316 MPa, biodegradability of 52.53%, and initial thermal degradation temperature of 257.66°C. Based on these results, the edible film from kolang-kaling has the potential to be used as an alternative eco-friendly food packaging to replace single-use plastic. Keywords: CMC, Edible Film, Glycerol, Kolang-kaling, Heating
FORMULATION OF BAR SHAMPOO BASED ON Eucheuma cottonii SEAWEED EXTRACT WITH VARYING CONCENTRATIONS OF SODIUM COCOYL ISETHIONATE Hidayana, Acut Rahmatul; Ridwan, R; Wijaya, Nanang Rahmat
Jurnal Sains dan Teknologi Reaksi Vol 23, No 02 (2025): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v23i02.8858

Abstract

This study aims to formulate shampoo bars as an environmentally friendly alternative hair care product by utilizing nutrient-rich Eucheuma cottonii seaweed extract and varying the concentration of Sodium Cocoyl Isethionate (SCI) as a natural surfactant that does not irritate the scalp. The E. cottonii extract was obtained through maceration with 96% ethanol and concentrated using a rotary vacuum evaporator. The SCI concentrations used were 30%, 35%, 40%, 45%, and 50%, while the E. cottonii extract concentrations were 2%, 6%, 10%, 14%, and 18%. The physical quality of the shampoo bar was evaluated through acidity (pH) testing, moisture content, foam stability, organoleptic testing (color, aroma, texture), and irritation testing. The results showed that all formulations had a pH of 5.5–6.33, meeting SNI 06-2692-1992 standards. The highest moisture content was recorded at 16.96% in SCI 30% and 18% extract, while the lowest was 5.26% in SCI 50% and 2% extract. Foam stability increased with increasing SCI, with the highest foam stability percentage of 79.22% in SCI 50% and 2% exract. Organoleptic testing showed good acceptance of color and texture, with the aroma of some formulas slightly changing to be less fresh, but generally still acceptable to the panelists. Irritation testing on 25 panelists did not show any serious irritation, indicating the optimal quality of the shampoo bar produced.  Keywords: Eucheuma cottonii, Maceration, Physical Quality, Shampoo bar, Sodium Cocoyl Isethionate
MODIFICATION OF NANO CHITOSAN AND POLYURETHANE ON THE THICKNESS AND THERMAL STABILITY OF LITHIUM ION BATTERY SEPARATORS Wahyudi, Kiki Salsa Nabila; Rihayat, Teuku; Putra, Alfian
Jurnal Sains dan Teknologi Reaksi Vol 23, No 02 (2025): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v23i02.8916

Abstract

This study aims to modify lithium-ion battery separators using a combination of polypropylene (PP), polyurethane (PU), and nano chitosan, and to evaluate the effects of varying composition ratios and soaking time on thickness and thermal stability. The separators were fabricated using the casting method with variations in the PP:PU:Nano Chitosan ratio (4:1:5, 4:2:4, 4:3:3, 4:4:2, and 4:5:1) and soaking times of 1–5 days. Characterization included thickness (Digital Thickness Gauge), thermal stability (thermal shrinkage test and TGA), and surface morphology (SEM). The results showed that a 4:3:3 ratio with 3 days of soaking produced the best performance, with a thickness of 23–25 µm, low thermal shrinkage (0.5%–2.1%), degradation onset at 370.10 °C, degradation peak at 429.73 °C, and a dense and uniform morphology with well-distributed pores. This formulation is recommended as a potential separator for lithium-ion battery applications.Keywords: Battery, Lithium-ion, Nano Chitosan, Polypropylene, Polyurethane, Separator
THE EFFECT OF MASERATION TIME VARIATION ON THE FORMULATION OF DEODORANT SPRAY FROM BASIL LEAVES (Ocimum basilicum L.) Usfa, Azra Arzahri; Suryani, S; Syafruddin, S
Jurnal Sains dan Teknologi Reaksi Vol 23, No 02 (2025): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v23i02.8914

Abstract

This study evaluated the effect of maceration time variation on the characteristics of basil leaf extract (Ocimum basilicum L.) and the performance of deodorant spray preparations containing the extract. Maceration was carried out using 96% ethanol for 2, 3, 4, 5, and 6 days. The extract was then formulated into a deodorant spray at concentrations of 5–25% (v/v). The parameters observed included yield, pH, antibacterial activity against Staphylococcus epidermidis (colony count/CFU method), and organoleptic testing (color, aroma, and after feel) by 25 panelists. The yield increased with maceration time from 8.64% (day 2) to 10.82% (day 6). The pH value of the preparation was 4.9–5.2, in accordance with SNI 16-4951-1998 and close to the physiological pH of the skin. Commercial deodorants reduced the number of bacterial colonies by 50%, while basil extract deodorants reduced it by 20% in the test concentration range. Organoleptically, the 15% concentration was most preferred by the panelists. These findings indicate that basil extract has potential as an active ingredient in natural spray deodorants; optimization of concentration, formulation base, and further statistical testing are recommended to enhance antibacterial efficacy.Keywords: Deodorant Spray, basil leaves, Ocimum basilicum L., maceration, antibacterial, organoleptic.
OPTIMIZATION OF SWEETENER ISOLATION FROM STEVIA LEAVES USING RESPONSE SURFACE METHODOLOGY (RSM) Kamila, K; Fachraniah, F; Harunsyah, H
Jurnal Sains dan Teknologi Reaksi Vol 23, No 02 (2025): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v23i02.8921

Abstract

The optimization of sweetener isolation from stevia leaves was carried out using the Response Surface Methodology (RSM). This study aimed to optimize the isolation process of sweeteners from Stevia rebaudiana Bertoni through RSM. The independent variables used were the number of extraction cycles (A) and particle size of the material (B), with four response parameters: extract yield percentage, sweetness level (%Brix), calorie content, and sweetness intensity. The experimental design applied the Central Composite Design (CCD) with quadratic regression model analysis. The results showed that both independent variables had significant effects on the response parameters, either individually or through interaction. Finer particle size (60–70 mesh) combined with the optimal number of extraction cycles enhanced sweetness and reduced the calorie content of the extract. The optimum conditions were obtained at 70 mesh particle size and two extraction cycles, with predicted values of 6.93% yield, 5.80% Brix sweetness, 27.02 kcal/100 g calories, and a sweetness intensity of 7.08. Model validation confirmed a good agreement between predicted and actual values, indicating that RSM is effective for optimizing the sweetener isolation process from stevia leaves. Keywords: Extraction, Extraction cycle, Optimization, Particle size, RSM (Response Surface Methodology), Stevia.
FORMULATION OF A CLEANSING BALM BASED ON VIRGIN COCONUT OIL USING RED DRAGON FRUIT PEEL (HYLOCEREUS POLYRHIZUS) EXTRACT AS AN ANTIOXIDANT Sahrina, Erni; Elfiana, E; Suryani, S
Jurnal Sains dan Teknologi Reaksi Vol 23, No 02 (2025): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v23i02.8922

Abstract

This study aimed to formulate a cleansing balm using natural active ingredients derived from red dragon fruit peel (Hylocereus polyrhizus, KBN) and virgin coconut oil (VCO). The treatments involved varying the ratios of virgin coconut oil (VCO) and red dragon fruit peel extract (Hylocereus polyrhizus, KBN) as well as mixing temperatures (60 °C, 65 °C, 70 °C, 75 °C, and 80 °C). Several quality parameters were evaluated, including organoleptic properties (color, fragrance, texture), antioxidant activity, homogeneity, pH, melting point, and cleansing efficacy. The total antioxidant content was determined using the DPPH assay and expressed as milligrams of vitamin C equivalent per gram of sample (mg VCE/g). The optimal formulation was obtained using 16% virgin coconut oil (VCO) and 9% red dragon fruit peel extract at a mixing temperature of 60 °C, yielding the highest antioxidant activity of 1.3486 mg VCE/g, a pH value within the recommended range for facial skin, and the highest organoleptic scores. These findings demonstrate that red dragon fruit peel is a promising source of natural bioactive compounds that can be effectively formulated into a safe and efficient cleansing balm product. Keywords: Antioxidant, Cleansing Balm, Maceration, Red Dragon Fruit Peel, Virgin Coconut Oil
AN EXPERIMENTAL STUDY OF THE EFFECT OF SAGO PULP MESH SIZE ON THE MECHANICAL PROPERTIES OF COMPOSITES Aufar Dhaifullah; I Iqbal; M Mahyuddin; M Muhtadin; Muhammad Faisal
Jurnal Sains dan Teknologi Reaksi Vol 24, No 01 (2026): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v24i01.9275

Abstract

This study aims to analyze the effect of variations in the mesh size of sago pulp on the mechanical properties of polyester resin-based composites. Sago pulp was used as a reinforcing material with mesh sizes of 20, 30, and 40, and a composition of 40% sago pulp and 60% polyester resin. The method used was a laboratory experiment involving tensile, bending, and impact tests.Test results show that the 30-mesh size has the highest tensile strength of 2.76 kgf/mm², while the 20-mesh size exhibits the highest bending strength of 2.88 kgf/mm². The 40-mesh size yields the lowest strength values in most tests. These differences are influenced by particle distribution and the quality of the bond between the sago pulp and the resin.It is concluded that mesh size significantly affects the mechanical properties of the composite, and sago pulp composites have the potential to serve as a more environmentally friendly alternative to wood. Keywords: sago pulp, composite, mesh size, mechanical properties.
DEVELOPING AN ANDROID PROTOTYPE APPLICATION TO PREDICT ROCK FRAGMENTATION FROM BLASTING IN SURFACE MINING Hendra Harisman; Nurul Aflah; Pocut Nurul Alam; M Muchlis; Febi Mutia
Jurnal Sains dan Teknologi Reaksi Vol 24, No 01 (2026): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v24i01.9313

Abstract

Blasting plays an important role in surface mining operations because it directly affects rock fragmentation, which is a key factor in optimizing mining performance. However, fragmentation prediction is commonly conducted using complex mathematical calculations on computers or laptops, making the process less practical and time-consuming. This study aims to develop an Android-based application to facilitate the prediction of blasting fragmentation results in a more efficient and accessible manner. The research employed a research and development (RD) methodology consisting of application design, development, and testing stages. The results show that the developed Android application can assist mining professionals in predicting rock fragmentation practically through smartphone devices. The application improves the efficiency and accessibility of fragmentation prediction and demonstrates the implementation of digital technology in mining practices within the Industry 4.0 era. Key words: blasting, surface mining, fragmentation prediction, mining optimization, digital technology.

Page 33 of 34 | Total Record : 331

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