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KAJIAN AWAL PEMBUATAN FILM PLASTIK (BAHAN PLASTIK PENGEMAS) DARI PATI BATANG UBI KAYU Harrison Situmorang, M. Hendra S. Ginting
Jurnal Teknik Kimia USU Vol 3, No 1 (2014)
Publisher : Universitas Sumatera Utara

Starch plastic films made from cassava stem starch by using glycerol as plasticizer and acetic acid as a catalyst gelatinized at 75 °C for 15 minutes. Starch weight, water volume, glycerol volume, and acetic acid volume were varied. The variation conditions of 3 ml of acetic acid volume (3:10 w/w) and 2 ml of glycerol volume (1:4 w/w) gave the best of tensile strength and elongation at break analysis. While at water volume variation, the tensile strength value is inversely proportional to the elongation at break. In FTIR analysis found that α-1,6 glycosidic (1010 cm-1) spectrum disappears as the effect of acetic acid presence, while the spectrum of α-1,4 glycosidic, COH, C=O, and OH shifted as the plasticization effect.

PENGARUH ASAM STEARAT TERHADAP SIFAT KETEGUHAN PATAH/MODULUS OF RUPTURE PAPAN PARTIKEL TERMOPLASTIK BEKAS BERPENGISI TEMPURUNG KELAPA Muh. Hendra S Ginting, Rosdanelli Hasibuan
Jurnal Teknik Kimia USU Vol 3, No 1 (2014)
Publisher : Universitas Sumatera Utara

The utilization of former thermoplastic and coconut shell as particle board is one way to reduce plastic waste packaging, the ratio of the former as a thermoplastic matrix and coconut shells as fillers 60:40. Purpose of this study was to determine the effect of stearic acid on properties of modulus of rupture former thermoplastic particle board filler of coconut shell. Method of shell particle board manufacturing using the extruder, starting with the modification of coconut shell particles (size 80 mesh) with stearic acid (0 g, 3 g, 6 g and 9 g in 60 ml of ethanol ) and then dried in an oven at a temperature 70oC . Matrix and coconut shell ( 60:40 ) mixed in the extruder and then printed with hot press at a temperature of 170oC, until forming particle board with a size of 200 mm x 200 mm x 10 mm. Particle board analyzed the modulus of rupture in accordance with SNI 03-2105-2006. The results showed an increase in modulus of rupture properties. The modulus of rupture is 37.402 MPa greatest.

PENGARUH PENAMBAHAN GLISEROL TERHADAP SIFAT KEKUATAN TARIK DAN PEMANJANGAN SAAT PUTUS BIOPLASTIK DARI PATI UMBI TALAS Rinaldi Febrianto Sinaga, Gita Minawaris Ginting, M. Hendra S Ginting, Rosdanelli Hasibuan
Jurnal Teknik Kimia USU Vol 3, No 2 (2014)
Publisher : Universitas Sumatera Utara

Bioplastics are a type of plastic made from renewable biomass sources, such as vegetable oil, corn starch, pea starch, and microbiota. Starch from tubers of talas (Colocasia esculenta) as a potential raw material for bioplastics by using glycerol as plastizicer. The purposes of the research are to know effect of adding glycerol to the properties of tensile strength and elongation at break bioplastic from starch taro tubers. In this research, the manufacture of bioplastics using casting methode with variations of starch solution (0,2 w/v, 0,3 w/v, and 0,4 w/v). The next additions to vary the volume of glycerol (1 % v, 2 % v, and 3 % v) and heating temperature of gelatin formation (60oC, 70oC, and 80oC). The results showed that bioplastics made from taro tuber starch has gelatinization temperature of 70oC. The addition of glycerol volume effect value of tensile strength and elongation at break of bioplastics. Increasing volume of glycerol will decrease tensile strength but increase elongation at break value. The best of bioplastics in this research is a variation of starch bioplastic 0,3 w/v, addition of 1 % v glycerol at a temperature of 70°C with a value of tensile strength is 18,4992 MPa and elongation at break value is 2,1290%.

PENGARUH RASIO EPOKSI/AMPAS TEBU DAN PERLAKUAN ALKALI PADA AMPAS TEBU TERHADAP KEKUATAN BENTUR KOMPOSIT PARTIKEL EPOKSI BERPENGISI SERAT AMPAS TEBU Akhmad Nadji Shabiri, Rizky Salaam Ritonga, M. Hendra S. Ginting
Jurnal Teknik Kimia USU Vol 3, No 3 (2014)
Publisher : Universitas Sumatera Utara

This study was aimed to determine the effect of alkali treatment and fiber composition on the impact strength properties of epoxy composites filled with bagasse fiber. Composites are made by hand lay-up method by mixing epoxy and bagasse fiber with variation of volume ratio between matrix and filler are 100/0, 70/30, 60/40, and 50/50 (v / v) and the concentration of NaOH slolution in the alkali treatment are 0% , 1%, 2%, and 3%. Mechanical propertie tested was impact strengthand analized by SEM analysis. The results obtained from this study was the maximum impact strength value obtained of the composite was on the composition 70:30 with 2% NaOH concentration was 8,005 kJ/m2.

PENGARUH BERAT PATI DAN VOLUME PLASTICIZER GLISEROL TERHADAP KARAKTERISTIK FILM BIOPLASTIK PATI KENTANG Afiifah Radhiyatullah, Novita Indriani, M. Hendra S. Ginting
Jurnal Teknik Kimia USU Vol 4, No 3 (2015)
Publisher : Universitas Sumatera Utara

Bioplastics are plastics which can be degraded by microorganisms and is made from renewable materials. Plastic film is made from potato starch (contain of starch that founded in potatoes is 22-28%), glycerol as a plasticizer and acetic acid as a catalyst. The purpose of this reasearch is to determine glycerol variation and starch weight effect on the characteristics of potato starch plastic films. Manufacture of plastic films use blending starch method with potato starch weight variations (10 g, 15 g and 20 g) and glycerol volume variations (0 ml, 1 ml, 2 ml and 3 ml). Bioplastic analysis are FTIR test, tensile strength that is supported by SEM analysis. The results obtained in the FTIR analysis does not form a new cluster on potato starch plastic film, neither on the plastic film with or without glycerol. FTIR results obtained in two plastic film are the change of OH, C = C, and CH groups strain. The strain value of OH group on potato starch is 3579.88 cm-1 turned into 2978.09 cm-1 for plastic film without glycerol while the plastic film with glycerol to be 3541.31 cm -1 and 2970.38 cm-1. C = C group is 1635.64 cm-1 turned to 1697.36 cm -1 and 1697.36 cm -1. As for CH group is 2873.79 cm -1 turned to 2877.79 cm -1 and 2870.08 cm -1. And tensile strength of plastic film decreased with increasing glycerol volume. Maximum tensile strength of plastic film occurs when potato starch weight is 10 g and glycerol volume is 0 ml is 9.397 MPa. While SEM results obtained confirm on tensile strength plastic film, where there are voids, indentations and insoluble starch clump starch that can affect the value of tensile strength plastic film.

PENGARUH KOMPOSISI KULIT KERANG DARAH (ANADARA GRANOSA) TERHADAP KERAPATAN, KETEGUHAN PATAH KOMPOSIT PARTIKEL POLIESTER Muhammad Hendra S Ginting; Netti Helina Siregar; Fendy Suwito; Billy Tanujaya
Prosiding Semnastek PROSIDING SEMNASTEK 2016
Publisher : Universitas Muhammadiyah Jakarta

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Papan partikel komposit Poliester ini merupakan papan alternatif dari hasil pengempaan kulit kerang darah (Anadara Granosa) sebagai pengisi. Tujuan dari penelitian ini untuk mengetahui pengaruh komposisi kulit kerang darah (Anadara Granosa) terhadap densitas dan keteguhan patah Modulus of Rupture) papan partikel komposit. Metode penelitian ini adalah pengempaan plat cetakan papan partikel sejajar dengan memvariasikan komposisi kulit kerang darah (Anadara Granosa) sebesar 0, 10, 20, 30 40, 50 dan 60 (% w). Hasil penelitian menunjukkan bahwa Sifat keteguhan patah Modulus of Rupture terbesar nilai 40, 941 MPa pada komposisi 30 (%w ) berat dengan dan densitas ebesar 1,618 gram/cm3 pada komposisi 60 (%w) kulit kerang darah. Kata kunci : polyester, kulit kerang

PENGARUH VARIASI TEMPERATUR GELATINISASI PATI TERHADAP SIFAT KEKUATAN TARIK DAN PEMANJANGAN PADA SAAT PUTUS BIOPLASTIK PATI UMBI TALAS Muhammad Hendra S Ginting; Rinaldi Febrianto Sinaga
Prosiding Semnastek PROSIDING SEMNASTEK 2014
Publisher : Universitas Muhammadiyah Jakarta

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Bioplastik adalah plastik terbuat dari biopolimer pati seperti pati jagung, ubi, kulit singkong, tepungporong, dan kentang. Talas (Colocasia esculenta) mempunyai komposisi kadar pati 80% sehinggaberpotensi sebagai bahan baku pembuatan bioplastik dengan menggunakan gliserol sebagaiplastizicer. Tujuan penelitian ini adalah mengetahui pengaruh variasi tempertur gelatinisasi patiterhadap sifat kekuatan tarik dan pemanjangan saat putus bioplastik dari pati umbi talas. Pembuatanbioplastik ini menggunakan metode casting. Tahap pertama mengaduk larutan pati 0,2 gr/ml,gliserol 1% v, asam asetat 2 ml sampai homogen dan dipanaskan memakai hotplate magneticstirrer dengan variasi temperatur gelatinisasi pati sebesar 60oC, 70oC, dan 80oC. Tahap keduamenuangkan larutan bioplastik kecetakan 25 cm x 25 cm x 0,1 cm. Bioplastik dianalisa sifatkekuatan tarik dan pemanjangan pada saat putus sesuai dengan ASTM D882. Hasil analisamenunjukkan bahwa sifat kekuatan tarik dan pemanjangan pada saat putus terbesar 9,4062 MPadan nilai pemanjangan saat putus 6,762 %.

PENGARUH BERAT PATI DAN VOLUME PLASTICIZER GLISEROL TERHADAP KARAKTERISTIK FILM BIOPLASTIK PATI KENTANG Afiifah Radhiyatullah; Novita Indriani; M. Hendra S. Ginting
Jurnal Teknik Kimia USU Vol. 4 No. 3 (2015): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Bioplastics are plastics which can be degraded by microorganisms and is made from renewable materials. Plastic film is made from potato starch (contain of starch that founded in potatoes is 22-28%), glycerol as a plasticizer and acetic acid as a catalyst. The purpose of this reasearch is to determine glycerol variation and starch weight effect on the characteristics of potato starch plastic films. Manufacture of plastic films use blending starch method with potato starch weight variations (10 g, 15 g and 20 g) and glycerol volume variations (0 ml, 1 ml, 2 ml and 3 ml). Bioplastic analysis are FTIR test, tensile strength that is supported by SEM analysis. The results obtained in the FTIR analysis does not form a new cluster on potato starch plastic film, neither on the plastic film with or without glycerol. FTIR results obtained in two plastic film are the change of OH, C = C, and CH groups strain. The strain value of OH group on potato starch is 3579.88 cm-1 turned into 2978.09 cm-1 for plastic film without glycerol while the plastic film with glycerol to be 3541.31 cm -1 and 2970.38 cm-1. C = C group is 1635.64 cm-1turned to 1697.36 cm -1 and 1697.36 cm -1. As for CH group is 2873.79 cm -1 turned to 2877.79 cm -1 and 2870.08 cm -1. And tensile strength of plastic film decreased with increasing glycerol volume. Maximum tensile strength of plastic film occurs when potato starch weight is 10 g and glycerol volume is 0 ml is 9.397 MPa. While SEM results obtained confirm on tensile strength plastic film, where there are voids, indentations and insoluble starch clump starch that can affect the value of tensile strength plastic film.

PENGARUH ASAM STEARAT TERHADAP SIFAT KETEGUHAN PATAH/MODULUS OF RUPTURE PAPAN PARTIKEL TERMOPLASTIK BEKAS BERPENGISI TEMPURUNG KELAPA Muh. Hendra S Ginting; Rosdanelli Hasibuan
Jurnal Teknik Kimia USU Vol. 3 No. 1 (2014): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

The utilization of former thermoplastic and coconut shell as particle board is one way to reduce plastic waste packaging, the ratio of the former as a thermoplastic matrix and coconut shells as fillers 60:40. Purpose of this study was to determine the effect of stearic acid on properties of modulus of rupture former thermoplastic particle board filler of coconut shell. Method of shell particle board manufacturing using the extruder, starting with the modification of coconut shell particles (size 80 mesh) with stearic acid (0 g, 3 g, 6 g and 9 g in 60 ml of ethanol ) and then dried in an oven at a temperature 70oC . Matrix and coconut shell ( 60:40 ) mixed in the extruder and then printed with hot press at a temperature of 170oC, until forming particle board with a size of 200 mm x 200 mm x 10 mm. Particle board analyzed the modulus of rupture in accordance with SNI 03-2105-2006. The results showed an increase in modulus of rupture properties. The modulus of rupture is 37.402 MPa greatest.

KAJIAN AWAL PEMBUATAN FILM PLASTIK (BAHAN PLASTIK PENGEMAS) DARI PATI BATANG UBI KAYU Harrison Situmorang; M. Hendra S. Ginting
Jurnal Teknik Kimia USU Vol. 3 No. 1 (2014): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Starch plastic films made from cassava stem starch by using glycerol as plasticizer and acetic acid as a catalyst gelatinized at 75 °C for 15 minutes. Starch weight, water volume, glycerol volume, and acetic acid volume were varied. The variation conditions of 3 ml of acetic acid volume (3:10 w/w) and 2 ml of glycerol volume (1:4 w/w) gave the best of tensile strength and elongation at break analysis. While at water volume variation, the tensile strength value is inversely proportional to the elongation at break. In FTIR analysis found that α-1,6 glycosidic (1010 cm-1) spectrum disappears as the effect of acetic acid presence, while the spectrum of α-1,4 glycosidic, COH, C=O, and OH shifted as the plasticization effect.

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