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E Elwina
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FORMULATION OF HAND AND BODY LOTION BASED ON VIRGIN COCONUT OIL (VCO) AND COCONUT OIL WITH BUTTERFLY PEA FLOWER (Clitoria ternatea L.) EXTRACT AS ANTIOXIDANT Syarifah Al Haura; E Elwina; Zuhra Amalia
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.v24i01.9474

Abstract

 Hand and body lotion is a cosmetic preparation used for skin care. Butterfly pea extract (Clitoria ternatea L.) was selected due to its anthocyanin, flavonoid, and phenolic content, which act as natural antioxidants. This study aims to formulate hand and body lotion based on Virgin Coconut Oil (VCO), coconut oil, and butterfly pea extract, and to evaluate its physical, chemical, and antioxidant properties. The extract was obtained through maceration using 70% ethanol with a yield of 37.28%. Lotion formulations were prepared with various ratios of VCO:Coconut Oil (1:0, 3:1, 1:1, 1:3, 0:1) and butterfly pea extract additions of 1–5 mL. The results showed that all formulations met SNI 16-3499-1996 standards with pH ranging from 5.0 to 6.6, viscosity between 43,000–47,000 cP, and specific gravity between 0.95–1.03 g/mL. Organoleptic tests indicated that the VCO:Coconut Oil ratio of 1:0 with 1– 3 mL extract was the most preferred by panelists. Antioxidant activity analysis yielded an IC50 value of 1.54 ppm, indicating very strong activity. The study concludes that the combination of Virgin Coconut Oil, coconut oil, and butterfly pea extract significantly affects the physical and antioxidant characteristics of the produced hand and body lotion.Keywords: Antioxidant, Butterfly Pea Extract, Hand and Body Lotion, Coconut Oil, Virgin Coconut Oil
THE EFFECT OF DEHYDRATOR DRYING ON THE QUALITY OF SUNTI ACID POWDER (Averrhoa Bilimbi L.) Cut Farah Balya; Zuhra Amalia; E Elwina
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.v24i01.10976

Abstract

This study utilized sunti acid (Averrhoa bilimbi L.) as the primary raw material to produce instant powder using a food dehydrator. The objective was to investigate the effects of drying temperature and duration on the quality of the resulting sunti acid powder. The study employed varying drying temperatures (60, 65, 70, 75, and 80°C) and drying times (6, 7, 8, 9, and 10 hours). The produced powder was analyzed for characteristics including moisture content, yield, hygroscopicity, solubility, pH, and vitamin C content, as well as organoleptic properties (color, aroma, texture, and taste). Results indicated that increasing the drying temperature and duration tended to reduce moisture content while increasing the powder yield. The lowest moisture content (0.08%) was achieved at 80°C for 9–10 hours, whereas the highest (97.29%) was observed at 60°C for 6 hours. Hygroscopicity values across all treatments were 0%. The lowest yield (10.1%) was obtained at 60°C for 6 hours, while the highest (16.5%) was obtained at 80°C for 10 hours. The highest solubility (97.29%) was achieved at 75°C for 8 hours, and the lowest (12.42%) at 60°C for 10 hours. The pH values of the sunti acid powder ranged from 2.5 to 2.8, and vitamin C content ranged from 0.263 to 0.880 mg. Based on the research results, the optimal treatment was achieved at a temperature of 75°C for 8 hours, yielding the highest solubility (97.29%), a moisture content of 0.10%, 0% hygroscopicity, a yield of 11.2%, a pH of 2.7, and a vitamin C content of 0.556 mg. The findings indicate that the use of a food dehydrator has the potential to produce sunti acid powder that is practical, stable, and possesses a longer shelf life.Keywords: sunti acid, Food Dehydrator, Drying Temperature, Drying Time, Instant Powder.
CHARACTERIZATION OF CALCIUM OXIDE (CaO) FROM RICE HUSK (Oryza Sativa L) AS A CATALYST FOR BIODIESEL SYNTHESIS USING WASTE-COOKED OIL Teuku Muhammad Razieq Akbar; E Elwina; Eka Kurniasih
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.v23i02.10982

Abstract

The use of rice husk waste as a raw material for calcium oxide (CaO) catalyst production is an innovative solution to support environmentally friendly and sustainable biodiesel production. This study aims to characterize CaO synthesized from rice husk and evaluate its effectiveness as a catalyst in the transesterification process of used cooking oil into biodiesel. Rice husk was calcined at 900°C for 6 hours, then analyzed using FTIR spectroscopy to identify the functional groups formed. The transesterification process was carried out with variations in the mesh size of rice husk (60/80 to 140/160) and catalyst weight (5–25 grams), to determine their effect on methyl ester yield and biodiesel quality. The characterization results showed an absorption peak at a wave number of 499.56 cm⁻¹ which indicates the presence of Ca–O groups, indicating the formation of CaO compounds. The highest yield was 82.11% at 80/100 mesh with a catalyst weight of 15 grams. The resulting biodiesel had physical and chemical properties that met SNI 7182:2015 standards, with a viscosity ranging from 4.28–4.72 mPa·s, a density of 0.859–0.875 g/cm³, and a flash point of 105–116°C. The results of this study demonstrate that the CaO catalyst from rice husk is effective for biodiesel synthesis, while also providing added value to agricultural waste. Keywords: Biodiesel, Rice Husk, CaO Catalyst, Waste Cooking Oil, Transesterification
CHARACTERISTICS OF CALCIUM OXIDE (CaO) FROM RICE HUSKS (ORYZA SATIVA) AS A CATALYST FOR BIODIESEL SYNTHESIS USING PALM OIL Andryan Suhagamal; N Nahar; E Elwina
Jurnal Sains dan Teknologi Reaksi Vol 23, No 01 (2025): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v23i01.10974

Abstract

This study aims to analyze the characteristics of calcium oxide (CaO) produced from rice husks (Oryza sativa) through combustion, as well as to test its effectiveness as a heterogeneous catalyst in biodiesel synthesis using palm oil. The variables studied included rice husk particle size (mesh 60/80 to 140/160) and catalyst weight (5–25 grams). The transesterification process was carried out at 60°C for 3 hours with a methanol to oil ratio of 60:150 mL. Catalyst characterization was performed using FTIR, while biodiesel was analyzed based on biodiesel yield, viscosity, density, and flash point in accordance with SNI 7182:2015. The results showed that particle size and catalyst weight significantly affected catalyst performance and biodiesel quality. A mesh size of 100/120 with a catalyst weight of 15 grams produced the highest yield of 86.9%, with a viscosity of 3.92 mPa·s, a density of 0.860 g/cm³, and a flash point of 111°C. All biodiesel physical property test results met SNI standards. Therefore, CaO from rice husks proved to be effective and environmentally friendly as an alternative catalyst in biodiesel production.Keywords: Biodiesel, Calcium Oxide, Rice Husk, Transesterification, Heterogeneous Catalyst
PREPARATION OF A HERBAL TEA COMBINING ROSELLA FLOWERS (Hibiscus sabdariffa L.) AND RED GINGER (Zingiber officinale Roscoe) AS AN ANTIOXIDANT Serly Ajeng Kiranti; F Fachraniah; E Elwina
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.v24i01.10966

Abstract

Herbal tea is a functional beverage that contains bioactive compounds and has the potential to serve as a source of natural antioxidants. Rosella flowers (Hibiscus sabdariffa L.) contain anthocyanins and flavonoids, while red ginger (Zingiber officinale Roscoe) contains gingerol and shogaol, which act as antioxidants. This study aimed to determine the effect of varying the composition of rosella flowers and red ginger, as well as variations in drying temperature and time using a food dehydrator, on the quality of the resulting herbal tea. The study was conducted using drying temperatures of 45°C, 50°C, 55°C, 60°C, and 65°C with drying times of 12 and 14 hours. The compositions of rosella flowers and red ginger used were 15 g : 0 g, 10 g : 5 g, and 0 g : 15 g. The parameters analyzed included moisture content, ash content, pH, antioxidant activity (DPPH method), and organoleptic testing. The results showed that variations in ingredient composition, temperature, and drying time affected the characteristics of the resulting herbal tea. The 10 g : 5 g ratio of rosella flowers to red ginger produced a higher-quality product compared to the other treatments. A drying temperature of 55°C and a drying time of 14 hours produced the best quality characteristics. Increasing the temperature and drying time resulted in lower moisture content in the product, while the pH value did not show any significant changes. The results of the antioxidant activity test showed an IC50 value of 25.25 ppm, which falls into the category of very strong antioxidants. The organoleptic test indicated that the herbal tea blend of rosella flowers and red ginger was well-received by the panelists based on their assessments of color, aroma, and taste. Keywords: rosella flowers, red ginger, herbal tea, antioxidant activity
FABRICATION OF LITHIUM-ION BATTERY SEPARATORS BASED ON CHITOSAN/POLYVINYLIDENE FLUORIDE USING THE SPIN COATING METHOD Mila Ramadani; S Satriananda; E Elwina
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.v24i01.10965

Abstract

This study developed a polyvinylidene fluoride (PVDF)-based lithium-ion battery separator reinforced with chitosan to improve performance and thermal stability. The primary objective of this study was to produce a chitosan-modified PVDF-based separator to enhance performance, thermal stability, and resistance to shrinkage. The fabrication methods used included spin coating with varying PVDF:chitosan ratios of 0.6:0.4, 0.7:0.3, 0.8:0.2, 0.9:0.1, and 1:0, as well as spin coating times of 10, 15, 20, 25, and 30 seconds. In the spin coating method, the solution was applied to ITO glass that had been cleaned using an ultrasonic cleaner, then spun for 10, 15, 20, 25, and 30 seconds, soaked in distilled water for 48 hours, and dried in a vacuum oven at 60°C for 6 hours. The results showed that a ratio of 0.7:0.3 produced an optimal thickness of 20 µm, in accordance with battery separator standards (25 µm). Thermal shrinkage testing at the same ratio yielded a shrinkage of 3.5%, in accordance with separator standards (5%). In the electrolyte wettability test, the electrolyte absorption rate was 268.5% (Excellent), and the electrolyte retention rate was 72.9% (Excellent). The porosity test yielded a porosity of 39.8%. Keywords: Lithium-ion battery, Polyvinylidene Fluoride, Chitosan, Separator, Spin Coating
Co-Authors Andryan Suhagamal Cut Farah Balya Eka Kurniasih F Fachraniah Mila Ramadani N Nahar S Satriananda Serly Ajeng Kiranti Syarifah Al Haura Teuku Muhammad Razieq Akbar Zuhra Amalia