Karakteristik Film k-karaginan dengan Penambahan Plasticizer Polietilen Glikol -- Characteristics of k-Carrageenan Film with Polyethylene Glycol as Plasticizer

Dina Fransiska, Giyatmi Giyatmi, Hari Eko Irianto, Muhamad Darmawan, Susiana Melanie

Abstract


ABSTRAK

Bahan plastik biodegradable saat ini sedang populer dikembangkan untuk menggantikan plastik kemasan konvensional yang tidak ramah lingkungan. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan polietilen glikol (PEG) terhadap karakteristik film berbahan dasar k-karaginan. k-karaginan yang digunakan dalam formulasi pembuatan film yaitu sebanyak 1,5% (b/v), sedangkan konsentrasi PEG yang ditambahkan bervariasi yaitu 2, 4, 6, 8, dan 10 % (b/b). Larutan dipanaskan hingga suhu 85 oC kemudian dicetak dalam bentuk film tipis, lalu didinginkan dan dikeringkan dengan oven hingga didapatkan berat konstan. Film yang diperoleh kemudian dilakukan analisis termal, kuat tarik, elongasi dan water vapor transmission rate (WVTR).  Hasil penelitian menunjukkan bahwa semakin besar polietilen glikol yang ditambahkan pada film karaginan dapat meningkatkan titik leleh dan entalpi, tetapi menurunkan nilai kuat tariknya, dan juga tidak mempengaruhi nilai WVTR. Penambahan PEG sampai konsentrasi 4% juga meningkatkan nilai elongasi film. Dari hasil pengujian diperoleh jumlah optimal penambahan PEG yaitu sebesar 4% dengan nilai kuat tarik sebesar 0,86±0,16MPa, elongasi 25,40±6,64%, dan WVTR 116,02±8,00 g/m2/24 jam.

ABSTRACT

Biodegradable plastic materials are currently being developed in broader scope, particularly to replace non-biodegradable plastic packaging. This study aimed to determine the effect of polyethylene glycol (PEG) concentration on the characteristics of  k-carrageenan based film.  k-carrageenan used in the film preparation was 1.5% (w/v) while PEG was added at various concentration i.e. 2, 4, 6, 8, and 10% (w/w). The solution was heated up to 85 oC and casted into thin film, then cooled and dried using oven until reached a constant weight. The film produced was then tested for its thermal behaviour, tensile strength, elongation and water vapor transmission rate (WVTR). The results showed that the increase of concentration of polyethylene glycol added to the carrageenan film could increase the melting point and enthalpy value as well as elongation of the film. However, it decreased the tensile strength, and did not affect to the WVTR. The optimum concentration of PEG added was found at 4% with the tensile strength of 0.86±0.16 MPa, elongation of 25.40±6.64%, and WVTR of 116.02±8.00 g/m2/24 hours.


Keywords


biodegradable film; k-karaginan; polietilen glikol

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DOI: http://dx.doi.org/10.15578/jpbkp.v13i1.504

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ISSN : 1907-9133(print), ISSN : 2406-9264(online)
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