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All Journal JBIO: jurnal biosains (the journal of biosciences) Majalah Kulit, Karet, dan Plastik Eksakta : Berkala Ilmiah Bidang MIPA SAINTI: Majalah Ilmiah Teknologi Industri
Tengku Rachmi Hidayani
Politeknik Teknologi Kimia Industri
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology

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Karakteristik plastik biodegradabel dari limbah plastik polipropilena dan pati biji durian Hidayani, Tengku Rachmi; Pelita, Elda; Nirmala, Dyah
Majalah Kulit, Karet, dan Plastik Vol 31, No 1 (2015): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (771.301 KB) | DOI: 10.20543/mkkp.v31i1.178

Abstract

Manufacturing of biodegradable plastic has been conducted by blending polypropylene plastic waste and durian seed starch. Polypropylene plastic waste was refluxed by xylene solvent and durian seeds starch was prepared by precipitation method with hard water and aquadest. The composition of blends were 94:6, 92:8, and 90:10 (%w/w). The mechanical and thermal properties of the resulting plastics were characterized. Based on the test result, biodegradable plastics with the ratio of 94:6 met the expectation. The mechanical properties obtained were tensile strength of 25.722 N/m2 and elongation at break of 5.292%. Thermal properties analysis showed that the melting point temperature was 163.68°C and the decomposition temperature was 445.62oC.Keywords: biodegradable plastic, polypropylene plastic waste, durian seeds starch, characteristic.ABSTRAKPembuatan plastik biodegradabel dari limbah plastik polipropilena dan pati biji durian dilakukan dengan membuat serbuk limbah plastik polipropilena dengan metode refluks dengan pelarut xilena dan pemisahan pati biji durian dengan metode perendaman dengan air sadah dan akuades. Variasi komposisi massa antara limbah plastik polipropilena dan pati dari biji durian yaitu 94:6, 92:8, dan 90:10 (% b/b). Hasil plastik biodegradabel yang diperoleh dikarakterisasi sifat mekanik dan termalnya. Plastik biodegradabel dari limbah plastik polipropilena dan pati biji durian dengan perbandingan 94:6 merupakan perbandingan yang sesuai dan memenuhi karakterisasi uji yang diharapkan. Hal tersebut dapat disimpulkan berdasarkan uji yang telah dilakukan yaitu dari hasil uji kekuatan tarik diperoleh 25,722 N/m2 dan kemuluran 5,292%. Analisis sifat termal menunjukkan hasil titik lebur pada suhu 163,68°C dan suhu terdekomposisi diperoleh 445,62oC.Kata kunci: plastik biodegradabel, limbah plastik polipropilena, pati biji durian, karakteristik.
Analisis sifat fisika pemanfaatan pati tandan kosong sawit dan limbah plastik LDPE sebagai bahan pembuatan plastik biodegradabel Hidayani, Tengku Rachmi; Pelita, Elda; Gusfiyesi, Gusfiyesi
Majalah Kulit, Karet, dan Plastik Vol 33, No 1 (2017): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (679.695 KB) | DOI: 10.20543/mkkp.v33i1.2202

Abstract

This research aimed to overcome the issue of plastic packaging waste that accumulates in nature because synthetic polymers cannot be easily unraveled by bacteria. Biodegradable plastics were produced by mixing waste of plastics of the low density polyethylene (LDPE) with starch of empty palm fruit bunches, modified with the addition of maleic anhydride as a crosslinking agent. To produce biodegradable plastics, different compositions of LDPE waste, starch of empty palm fruit bunch, maleic anhydride, and benzoyl peroxide were used, namely (90: 10: 1: 1), (80: 20: 1: 1), (70: 30: 1: 1), and (60: 40: 1: 1). Research stages consisted of extraction of starch from palm empty fruit bunch (PEFB); preparation of biodegradable plastic powder with the reflux method and xylene solvents; and making of biodegradable plastics using the press molding method. Based on the results of characterization, it was revealed that the optimum condition was generated by biodegradable plastics with the composition of LDPE waste, starch of empty palm bunches, maleic anhydride, and benzoyl peroxide was equal to 60: 40: 1: 1, which generated the tensile strength value of 6.9410 N/m2, the elongation at break of 3.1875%, the the melting point temperature of 103oC, and the decomposition temperature of 384oC. Besides, the thermal gravimetric test generated a residue of 12.6% and results of the analysis on morphological properties suggested that the starch distributed evenly.Keywords: Biodegradable plastics, LDPE waste, LDPE-g-MA, starch, palm empty fruit bunch.
Karakteristik plastik biodegradable dari limbah polipropilena dan pati tandan kosong kelapa sawit melalui metode pencampuran kering Elda Pelita; Tengku Rachmi Hidayani; Risma Sari; Irfan Rusmar; Trisna Yuniarti
Majalah Kulit, Karet, dan Plastik Vol 36, No 2 (2020): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20543/mkkp.v36i2.5841

Abstract

Pemanfaatan limbah plastik polipropilena dan tandan kosong kelapa sawit dilakukan dengan cara mengolah serta menggabungkan limbah plastik polipropilena dengan pati tandan kosong sawit menjadi plastik biodegradable yang mudah terurai di alam. Modifikasi komposisi yang digunakan pada pembuatan plastik biodegradable adalah limbah plastik dan pati tandan kosong sawit adalah (80:20; 70:30; 60:40). Metode pencetakan plastik biodegradable adalah dengan metode kempa tekan panas. Hasil karakterisasi plastik biodegradable dengan komposisi optimum yaitu pada perbandingan 60:40 menunjukkan harga kekuatan tarik 6,54 N/m2 dan kemuluran 2,42%. Hasil analisa sifat biodegradable-nya didapatkan penurunan massa yang telah ditanam selama 1 bulan yaitu pada tanah sampah sebesar 6,78% dan analisa dengan FT-IR ditemukan bilangan gelombang 1165 cm-1 yang menunjukkan gugus fungsi C-O bending yang khas untuk menunjukkan ikatan antara limbah plastik polipropilena ter-grafting maleat anhidrida dan pati yang didukung dengan bilangan gelombang 1590-1560 cm-1 yang menunjukkan gugus fungsi C=C pada maleat anhidrida dan polipropilena yang terikat silang.
Analisis sifat fisika pemanfaatan pati tandan kosong sawit dan limbah plastik LDPE sebagai bahan pembuatan plastik biodegradabel Tengku Rachmi Hidayani; Elda Pelita; Gusfiyesi Gusfiyesi
Majalah Kulit, Karet, dan Plastik Vol 33, No 1 (2017): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (679.695 KB) | DOI: 10.20543/mkkp.v33i1.2202

Abstract

This research aimed to overcome the issue of plastic packaging waste that accumulates in nature because synthetic polymers cannot be easily unraveled by bacteria. Biodegradable plastics were produced by mixing waste of plastics of the low density polyethylene (LDPE) with starch of empty palm fruit bunches, modified with the addition of maleic anhydride as a crosslinking agent. To produce biodegradable plastics, different compositions of LDPE waste, starch of empty palm fruit bunch, maleic anhydride, and benzoyl peroxide were used, namely (90: 10: 1: 1), (80: 20: 1: 1), (70: 30: 1: 1), and (60: 40: 1: 1). Research stages consisted of extraction of starch from palm empty fruit bunch (PEFB); preparation of biodegradable plastic powder with the reflux method and xylene solvents; and making of biodegradable plastics using the press molding method. Based on the results of characterization, it was revealed that the optimum condition was generated by biodegradable plastics with the composition of LDPE waste, starch of empty palm bunches, maleic anhydride, and benzoyl peroxide was equal to 60: 40: 1: 1, which generated the tensile strength value of 6.9410 N/m2, the elongation at break of 3.1875%, the the melting point temperature of 103oC, and the decomposition temperature of 384oC. Besides, the thermal gravimetric test generated a residue of 12.6% and results of the analysis on morphological properties suggested that the starch distributed evenly.Keywords: Biodegradable plastics, LDPE waste, LDPE-g-MA, starch, palm empty fruit bunch.
GRAFTING POLIPROPILENA DENGAN MALEAT ANHIDRIDA SEBAGAI PENGIKAT SILANG DENGAN INISIATOR BENZOIL PEROKSIDA Tengku Rachmi Hidayani
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 19 No. 1 (2018): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (825.931 KB) | DOI: 10.24036/eksakta/vol19-iss1/127

Abstract

Padang 25171 (0751-7055053 – 081374388030) rachmihidayani@gmail.com ABSTRAK Telah dilakukan penelitian tentang fungsionalisasi polipropilena maleat anhidrida (MA) dengan inisiator benzoil peroksida (BPO) melalui metode refluks. Reaksi grafting dilakukan dengan metode refluks menggunakan pelarut xilena pada suhu 160oC dengan variasi komposisi (b/b) PP : MA : BPO, 97:1:2, 95:3:2, 92:6:2, 89:9:2, dan 86:12:2 . selanjutnya dilakukan penentuan derajat grafting dengan metode titrasi dan analisa spektra FTIR untuk menentukan adanya grafting maleat anhidrida pada rantai polipropilena. Hasil penelitian menunjukan bahwa proses grafting maleat anhidrida pada polipropilena dapat terjadi dan perbandingan berat campuran PP:MA:BPO (95:3:2) merupakan derajat grafting tertinggi maleat anhidrida.
ISOLATION AND SCREENING OF AMYLASE PRODUCING BACTERIA FROM PALM OIL LIQUID WASTE Harmileni Harmileni; Rika Silvany; Tengku Rachmi Hidayani; Edy Fachrial
JBIO: jurnal biosains (the journal of biosciences) Vol 8, No 3 (2022): JBIO: jurnal biosains (the journal of biosciences)
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jbio.v8i3.39886

Abstract

Amylase is the most studied enzyme in biotechnology and also accounts for 25% of the total enzyme market worldwide. In industry, amylase has potential applications in the bakery, textile, detergent, syrup, pharmaceutical, and medical industries. One of the potential sources of amylase is microbes, because it is easy to isolate, culture, and also genetically engineered. Liquid waste is one of the most potential and abundant sources of microbes. In this study, the authors used palm oil waste as a source of amylase-producing microbes. The purpose of this study was to isolate and screen bacteria that showed amylase activity. Bacteria were isolated from palm oil liquid waste samples using the serial dilution method and the number of CFUs was calculated. The isolates were then characterized morphologically including Gram staining, elevation, color, edge, cell shape and also catalase reaction. Characterization results obtained 7 gram positive isolates and 8 gram negative isolates, the shape of cocci (12 isolates) and bacilli (3 isolates) and convex elevation and white isolates. Amylase activity was detected using nutrient agar media supplemented with 1% starch and the amylolytic index was measured. Amylolytic activity was indicated by the presence of a clear zone around the isolate. Of the 15 isolates, only 1 isolate showed amylase activity, namely LCF 4 with an amylolytic index of 0.57. Further research is recommended to identify and determine enzyme activity.Keywords : Activity; amylase; bacteria; palm oil liquid waste
MALEAT ANHIDRIDA SEBAGAI PENGGRAFTING POLIPROPILENA DENGAN INISIATOR BENZOIL PEROKSIDA Tengku Rachmi Hidayani
JURNAL ILMIAH TEKNOLOGI INDSUTRI (SAINTI) Vol 12, No 2 (2015): VOL 12 NOMOR 2 DESEMBER 2015
Publisher : Politeknik ATI Padang

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

Abstract

Telah dilakukan penelitian tentang pengaruh konsentrasi maleat anhidrida (MA) terhadap derajat grafting maleat anhidrida pada polipropilena (PP) dengan inisiator benzoil peroksida (BPO). Reaksi grafting dilakukan dengan teknik pengolahan reaktif dalam internal mixer pada suhu 165oC dengan variasi komposisi (b/b) PP : MA : BPO, 97:1:2, 95:3:2, 92:6:2, 89:9:2, dan 86:12:2 . selanjutnya dilakukan penentuan derajat grafting dengan metode titrasi dan analisa spectra FTIR untuk menentukan adanya grafting maleat anhidrida pada rantai polipropilena. Hasil penelitian menunjukan bahwa proses grafting maleat anhidrida pada polipropilena dapat terjadi dan perbandingan berat campuran PP:MA:BPO (95:3:2) merupakan derajat grafting tertinggi maleat anhidrida. Kata kunci : Ikat Silang, Grafting Polipropilena, Maleat anhidrida
Co-Authors Dyah Nirmala, Dyah Edy Fachrial Elda Pelita Elda Pelita Elda Pelita, Elda Gusfiyesi Gusfiyesi Gusfiyesi Gusfiyesi, Gusfiyesi Harmileni Irfan Rusmar Rika Silvany Risma Sari Trisna Yuniarti