PENGARUH PEMLASTIS POLI(PROPILEN ITAKONAT) DAN GLISEROL TERHADAP SIFAT FISIKO-KIMIA FILM ALGINAT/ASAM PALMITAT

LAKSMI SATWIJAYANTI, Dr. Adhitasari Suratman, M.Si.; Dr. Roto, M.Eng.

2015 | Skripsi | S1 KIMIA

Telah dipelajari pembuatan film berbahan dasar alginat dan asam palmitat dengan poli(propilen itakonat) (PPI) dan gliserol (GLI) sebagai pemlastis. Penelitian ini bertujuan untuk mengetahui pengaruh PPI dan GLI terhadap karakter fisik dan mekanik dari film alginat/asam palmitat. Film dibuat dari alginat, asam palmitat dengan variasi konsentrasi asam palmitat 0, 5, 10 dan 15% (b/b alginat), serta pemlastis dengan variasi konsentrasi 3, 6, 9, 12, 15, dan 18% (b/b alginat). Film dikarakterisasi dengan FT-IR dan diuji kuat tarik, persen perpanjangan, laju transmisi uap air (water vapor transmission rate/WVTR) dan uji biodegradasi dengan bakteri EM4. Film menunjukkan kondisi optimum pada konsentrasi asam palmitat 10% dan pemlastis 15%. Film alginat/asam palmitat dengan pemlastis PPI menunjukkan nilai kuat tarik sebesar 11,70 MPa, persen perpanjangan 6,39% dan WVTR 1,33 g mm/(m2 jam). Sedangkan pada penggunaan pemlastis GLI menghasilkan nilai kuat tarik sebesar 5,08 MPa, persen perpanjangan 14,72% dan nilai WVTR 1,13 g mm/(m2 jam). Kedua film dapat terbiodegradasi selama 6 hari serta uji karakterisasi dengan FT-IR menunjukkan tidak terbentuknya gugus fungsi baru.

Films of alginate and palmitic acid with poly(propylene itakonic) (PPI) and glycerol (GLY) as plasticizers were studied. The purpose of this study was to investigate the effect of PPI and GLY on the physical and mechanical properties of alginate/palmitic acid film. The films of alginate, palmitic acid with the concentration variation of 0, 5, 10 and 15% (w/w alginate) and plasticizers with the concentration variation of 3, 6, 9, 12, 15 and 18% (w/w alginate) were prepared. The films were characterized with FT-IR and UTM for the tensile strength and elongation test. The films were also determined the water vapor transmition rate (WVTR) and biodegradation test with EM4. The result of this study showed that a film which contain 10% palmitic acid and 15% plasticizer had an optimum physical and mechanical properties. Film with PPI as plasticizer showed tensile strength of 11.70 MPa, elongation of 6.39% and WVTR value of 1.33 g mm/(m2 hour). Film with GLY as plasticizer gave tensile strength of 5.08 MPa, elongation of 14.72% and WVTR value of 1.13 g mm/(m2 hour). Both films needed 6 days for biodegration. FT-IR spectra showed that new functional grup was not found at this film.

Kata Kunci : film alginat/asam palmitat, alginat, asam palmitat, gliserol, poli(propilen itakonat)