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MODIFIKASI PATI SUKUN DENGAN METODE IKAT SILANG MENGGUNAKAN TRINATRIUM TRIMETAFOSFAT Zuhra, Cut Fatimah; Ginting, Mimping; Marpongahtun, Marpongahtun; Syufiatun, Ayu
Chimica et Natura Acta Vol 4, No 3 (2016)
Publisher : Departemen Kimia

Pati alami memiliki aplikasi terbatas karena tidak selalu memiliki sifat yang diinginkan untuk beberapa jenis pengolahan. Oleh karena itu diperlukan modifikasi untuk meningkatkan penggunaan dari pati tersebut, salah satunya dengan melakukan modifikasi pada struktur pati. Penelitian ini bertujuan untuk menghasilkan pati termodifikasi yaitu pati ikat silang fosfat. Pati ikat silang fosfat disintesisÂ denganÂ mereaksikan pati sukun dengan natrium trimetafosfatÂ dan dilakukan variasiÂ berat natrium trimetafosfat (1%, 2%, 3%) dan waktu reaksi (30, 60 dan 90 menit). Dari hasil uji yang dilakukan dengan menggunakan spektroskopi IR maka terbentuknya pati fosfat didukung dengan munculnya vibrasi P-O-C pada daerah bilangan gelombang 1050-995 cm-1 dan daerah 1643 cm-1. Pengaruh penambahan konsentrasi trinatrium trimetafosfat dapat meningkatkan nilai derajat substitusi dan menurunkan swelling power. Derajat subtitusi diperoleh berkisar antara 0,2343-0,3003, dimana derajat substitusi yang paling tinggi diperoleh pada penambahan berat natrium trimetafosfat 3% dan waktu reaksi 60 menit yaitu 0,3003.

INFLUENCE OF PALM OIL PALM CONSUMPTION WITH ADHESITATING BASED ON POLYPROPYLENE AND POLYPROPYLENE GRAFTING MALEAT ANHIDRAT Adiansyah ,; Darwin Yunus; Marpongahtun ,
AGRIUM: Jurnal Ilmu Pertanian Vol 20, No 3 (2017)
Publisher : UNIVERSITAS MUHAMMADIYAH SUMATERA UTARA

The preparation and characterization of particle board from oil palm stem powders (Elaeis Guineensis Jacq) with polypropylene based adhesive and polypropylene grafting maleic anhydride was carried out with water immersion variation at 60 ° C and using 1% NaOH respectively for 24 hours. The results showed maximum MoR value for 1% NaOH immersion particle board at 430.11 kgf / cm2, density 0.54 g / cm3, water absorption 0.58%, and 0.47% thick development. For maximum particle particle MoE value of 10551.09 kgf / cm2 of density 0.63 g / cm3, 0.61% water absorption, and 0.49% thickness development, the results of this test meets the requirements of SNI 03-2105-2006. The FT-IR analysis shows typical uptake peaks at 3345.21 cm-1 and 1722.07 cm-1 which indicate the vibration of the hydroxyl group of palm oil cellulose and the vibration of the carbonyl ester group formed from the reaction of the maleic group with the hydroxyl group of the wood pulverized cellulose . The SEM analysis shows a homogeneous surface against a particle board with 1% NaOH immersion. TGA analysis of 1% NaOH particle gives two vertices of thermogravimetric curve, the first stage is 144.72oC - 166.13oC with a mass decrease of 5.596% (0.6966 mg) and in the second stage 200oC-358.23oC there is a mass decrease of 30.15% (3.753 mg) Residue of 10.97% (1.365 mg).Keywords: Polypropylene, PP-G-AM, Palm Oil Powder

MODIFIKASI PATI SUKUN DENGAN METODE IKAT SILANG MENGGUNAKAN TRINATRIUM TRIMETAFOSFAT Cut Fatimah Zuhra; Mimping Ginting; Marpongahtun Marpongahtun; Ayu Syufiatun
Chimica et Natura Acta Vol 4, No 3 (2016)
Publisher : Departemen Kimia

Pati alami memiliki aplikasi terbatas karena tidak selalu memiliki sifat yang diinginkan untuk beberapa jenis pengolahan. Oleh karena itu diperlukan modifikasi untuk meningkatkan penggunaan dari pati tersebut, salah satunya dengan melakukan modifikasi pada struktur pati. Penelitian ini bertujuan untuk menghasilkan pati termodifikasi yaitu pati ikat silang fosfat. Pati ikat silang fosfat disintesis dengan mereaksikan pati sukun dengan natrium trimetafosfat dan dilakukan variasi berat natrium trimetafosfat (1%, 2%, 3%) dan waktu reaksi (30, 60 dan 90 menit). Dari hasil uji yang dilakukan dengan menggunakan spektroskopi IR maka terbentuknya pati fosfat didukung dengan munculnya vibrasi P-O-C pada daerah bilangan gelombang 1050-995 cm-1 dan daerah 1643 cm-1. Pengaruh penambahan konsentrasi trinatrium trimetafosfat dapat meningkatkan nilai derajat substitusi dan menurunkan swelling power. Derajat subtitusi diperoleh berkisar antara 0,2343-0,3003, dimana derajat substitusi yang paling tinggi diperoleh pada penambahan berat natrium trimetafosfat 3% dan waktu reaksi 60 menit yaitu 0,3003.

Physical-Mechanical Properties And Microstructure Of Breadfruit Starch Edible Films With Various Plasticizer Cut Fatimah Zuhra Marpongahtun
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 13, ISSUE 1-2, August 2013
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/eksakta.vol13.iss1-2.art7

Breadfruit contains starch can be used as raw material of edible film. Research on preparation of edible films using various types of plasticizer (xylitol, sorbitol and PEG 400) has been done. The edible films were evaluated of physical-mechanical properties and microstructure. The results of this study indicate that the addition of plasticizer effect on the physical and mechanical characteristics, the edible film thickness, tensile strength and water vapor transmission rate greater using PEG 400 but percent elongation smaller than xylitol and sorbitol. Surface analysis of film was performed using Scanning Electron Microscopy (SEM) method.Keyword : Edible Film; Pati Sukun; Plasticizer; Silitol; Sorbitol ; PEG 400

ANALISA MORFOLOGI CARBON DOTS (C-Dots) DARI AIR TEBU Khairul Amri; Marpongahtun Marpongahtun
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 5 No 1 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (247.696 KB)

Carbon dots (C-dots) measuring less than 10 nm are currently the center of attention in nanocarbon materials. C-dots have unique physicochemical and photochemical properties that make C-dots a promising platform for imaging, environmental, catalytic, biological and energy-related applications. Sugarcane (Saccharum officinarum) is an annual plantation crop that is used as raw material for making sugar. The main content of sugarcane juice is sucrose (70-88%). The sugarcane juice content and low price make sugarcane juice suitable for use as a basic material for making carbon dots (C-dots). The process of making C-dots from sugarcane juice is done by adding urea as a passivation agent using the microwave method with a power of 110 watts. Sugarcane juice and urea (10:1) were dissolved with distilled water, stirred and heated at a temperature of 70 C for 15 minutes. The solution was then put in the microwave to dry (20 minutes). The gel formed was then dissolved with distilled water, centrifuged and then dialyzed for 24 hours. Morphological analysis of C-dots was performed by TEM analysis, showing that C-dots had an average diameter of 6.2 nm.

Effect of Nanocrystal Cellulose Isolated from Empty Fruit Bunches (Elaeis Guineensis Jack) Addition on Morphological and Mechanical Properties of Natural Rubber Latex Product. Marpongahtun
Journal of Chemical Natural Resources Vol. 2 No. 2 (2020): Journal of Chemical Natural Resources
Publisher : Talenta Publisher

The research about the effect of the addition of nano crystal cellulose (NCC) isolated from empty palm bunches (EPB) on the morphological and mechanical properties of natural rubber latex products was successfully conducted. This research was carried out in three steps: i.e isolation of α-cellulose from EPB, followed by isolation NCCs from α-cellulose using H2SO4 48.84% at 45ºC for 25 minutes, and manufacture of latex compound with varying filler NCC were 0, 0.6, 1.2, 1.8, 2.4, and 3.0. Manufacturing of natural rubber product was made with pour the NRL followed by vulcanized at 120ºC for 30 minutes. The sheet of NRL product was produced later characterized its mechanical properties through tensile test and surface morphology analysis by SEM. The optimum value of the tensile test result of the NRL product sheet was at the addition of 1,2 phr of NCC with values of tensile test, elongation at break, and Young’s modulus was 3.771 MPa, 877%, and 0.430 Mpa respectively. In addition, surface morphology analysis showed that the NCC was spread evenly.

ANALISA MORFOLOGI CARBON DOTS (C-Dots) DARI AIR TEBU Khairul Amri; Marpongahtun Marpongahtun
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 5 No. 1 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Carbon dots (C-dots) measuring less than 10 nm are currently the center of attention in nanocarbon materials. C-dots have unique physicochemical and photochemical properties that make C-dots a promising platform for imaging, environmental, catalytic, biological and energy-related applications. Sugarcane (Saccharum officinarum) is an annual plantation crop that is used as raw material for making sugar. The main content of sugarcane juice is sucrose (70-88%). The sugarcane juice content and low price make sugarcane juice suitable for use as a basic material for making carbon dots (C-dots). The process of making C-dots from sugarcane juice is done by adding urea as a passivation agent using the microwave method with a power of 110 watts. Sugarcane juice and urea (10:1) were dissolved with distilled water, stirred and heated at a temperature of 70 C for 15 minutes. The solution was then put in the microwave to dry (20 minutes). The gel formed was then dissolved with distilled water, centrifuged and then dialyzed for 24 hours. Morphological analysis of C-dots was performed by TEM analysis, showing that C-dots had an average diameter of 6.2 nm.

Coconut oil effect on the hygroscopic properties of Simalambuo wood (Lophopetalum spp.) LIVER IMAN PUTRA ZAI; SAHARMAN GEA; MARPONGAHTUN MARPONGAHTUN; EDDYANTO EDDYANTO; NUR AZIZAH; APRI H SISWANTO
Jurnal Natural Volume 22 Number 2, June 2022
Publisher : Universitas Syiah Kuala

Simalambuo (Lophopetalum spp) trees are endemic to Southeast Asia and widely grow in the natural forests in Nias island. Local people whose experience of utilizing the simalambuo wood have claimed that the wood easily absorbs water. Throughout our searches, not many efforts to modify the physical properties of the simalambuo woods have been carried out yet. Therefore, in this study, we modified simalambuo wood by thermal treatment in coconut oil-ambient conditions. The heat treatment became an option to support the efforts in reducing the use of non-environmental-friendly materials and methods. The simalambuo wood was treated under coconut oil at 130-210oC for 6 hours. Coconut oil uptake was up to 174%, while the leaching test (AWPA E-06 standard) showed the uneasily permeate out from the wood and high retention differently in terms of treatment and cooling temperature. Heat treatment with coconut oil affected water absorption ability and improved dimensional stability of simalambuo wood. Water absorption reduced from 162% to 16%, and dimensional stability increased from 8.4% to 4.2% at 192 hours after being soaked in water. The higher the difference between treatment and cooling temperature, the better-affected water absorption ability was and the higher dimensional ability could be achieved.

Training in the Manufacture of Softener Fragrance Aroma Therapy in Tembung Village, District Percut Sei Tuan Marpongahtun; Andriayani; Agung Pratama; Helmina br Sembiring; Aniza Salviana Prayugo; Amru Daulay
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 8 No. 1 (2023): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/abdimastalenta.v8i1.10326

Tembung Village, Percut Sei Tuan District, Deli Serdang Regency, North Sumatra Province, is a densely populated area. There are more than 200 laundry businesses. The potential for laundry business actors to produce softener and aromatherapy fabric softener has been hit very hard. However, the villagers, especially laundry business actors, do not know how to make these products. Making aromatherapy softeners independent will provide added value to the laundry business actors and villagers regarding economic costs and the transfer of knowledge of technology (science and technology commercialization). Therefore, the University of North Sumatra community service team wants to commercialize science and technology in making aroma softening therapy. The method used in this activity is the selection of partner locations, training, monitoring, and evaluation. The results of the questionnaire gave a value of 95% Participants were interested in training to produce aromatherapy softeners independently and took the initiative to make the results of this training a new opportunity.

Synthesis of Carbon Dots From Empty Fruit Bunch Biochar an Acid-Free Hydrothermal Method Marpongahtun Marpongahtun; Rufina Pramudita; Saharman Gea; Amru Daulay
Elkawnie: Journal of Islamic Science and Technology Vol 9, No 1 (2023)
Publisher : Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v9i1.14524

Abstract: Carbon dots have gained much interest due to their outstanding optical and electrical properties, making them useful for a wide range of applications. Here Empty fruit bunch (EFB) biochar was used as a carbon source in a straightforward, environmentally friendly, and reproducible hydrothermal method for producing carbon quantum dots. In this study, the role of the hydrothermal process was seen and studied by comparing the shape and fluorescence. Exciting results from HRTEM show that the carbon quantum dots in the sample are 4 nm in size. The obtained CD emits bright blue luminescence, and the absorption peak of the carbon dots was observed in the UV region with maximum absorption at 205 nm and 322 nm. The light CD shows an intense sky blue color upon illumination by a UV-light source at 365 nm. The intensity of the photoluminescence (PL) spectra sharply increases with decreasing concentration of carbon dots. Meanwhile, the CD exhibited excitation-dependence, photo-stability, and well dispersibility. These results suggest that the present CD are potential applications in optoelectronics and imaging.Abstrak: Karbon dots telah menarik banyak perhatian karena sifat listrik dan optik yang luar biasa, sehingga dapat digunakan untuk berbagai aplikasi. Penelitian ini, menggunakan biochar tandan buah kosong (EFB) sebagai sumber karbon dengan metode hidrotermal yang ramah lingkungan untuk menghasilkan karbon dots. Hasil HR-TEM yang menarik menunjukkan bahwa sampel karbon dots berukuran 4 nm. Karbon dots yang diperoleh memancarkan sinar biru terang dan puncak serapan titik karbon diamati pada spektrofotometri Uv-Vis dengan serapan maksimum pada 205 nm dan 322 nm. Intensitas karbon dots menunjukkan warna biru langit di cahaya UV pada 365 nm. Intensitas spektroskopi luminesens meningkat tajam dengan menurunnya konsentrasi titik karbon. Sementara itu, karbon dots menunjukkan eksitasi, stabilitas, dan dispersibilitas baik. Hasil ini menunjukkan bahwa karbon dots dapat digunakan pada beberapa aplikasi seperti dalam optoelektronik dan pencitraan.

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