Fabrikasi dan karakterisasi nanofiber gelatin dengan penambahan co-solvent melalui metode electrospinning

ARI SETIAWAN, Dr. Eng. Kuwat Triyana, M.Si

2014 | Tesis | S2 Ilmu Fisika

Pada penelitian ini telah dibuat nanofiber dengan beberapa variasi asam asetat dalam gelatin untuk mengetahui pengaruhnya terhadap morfologi nanofiber gelatin. Larutan gelatin dibuat konsentrasi 5 wt% sampai 40 wt% variasi asam asetat 10%, 15% dan 20% dengan penambahan co-solvent ethylene glycol 1 ml dan tanpa co-solvent ethylene glycol. Rasio perbandingan massa gelatin:ethyelene glycol 19:1. Proses electrospinning dilakukan pada tegangan 15 kV dengan jarak 11 cm antara ujung jarum dan kolektor. Pengukuran pada larutan gelatin mencakup sifat pH, konduktivitas, viskositas dan tegangan permukaan. Hasil pengukuran larutan gelatin menunjukkan bahwa penambahan asam asetat dapat merubah sifat larutan tersebut. Semakin tinggi nilai viskositas larutan gelatin menyebabkan semakin besar diameter nanofiber. Semakin besar nilai konduktivitas larutan gelatin menghasilkan nanofiber yang seragam. Semakin besar konsentrasi gelatin menyebabkan terjadinya kenaikkan nilai pH larutan gelatin dan nilai tegangan permukaan cenderung meningkat. Konsentrasi gelatin 30 wt% dengan menggunakan asam asetat 10%, 15% dan 20% serta penambahan co-solvent ethylene glycol 1 ml tanpa disertai bead-bead. Diameter nanofiber pada konsentrasi gelatin 30 wt% berturut-turut adalah 165 ± 12 nm, 190 ± 31 nm, 190 ± 23 nm. Sedangkan hasil FTIR puncak serapan nanofiber gelatin lebih rendah dibandingkan dengan puncak gelatin serbuk.

In this study has been made of nanofiber with some variation of acetic acid in gelatin to determine its effect on the gelatin nanofiber morphology. Gelatin solution was made a concentration of 5 wt% to 40 wt% acetic acid variation 10%, 15% and 20% with the addition of co-solvent ethylene glycol 1 ml and without co-solvent ethylene glycol. The ratio of the mass of gelatin: ethyelene glycol 19: 1. Electrospinning process is carried out at a voltage of 15 kV with a distance of 11 cm between the needle tip and the collector. Measurements on gelatin solution include the nature pH, conductivity, viscosity and surface tension. The measurement results showed that the addition of gelatin solution of acetic acid can change the nature of the solution. The higher the viscosity of the solution of gelatin cause the greater diameter of the nanofiber. The greater the conductivity of a solution of gelatin produce uniform nanofiber. The greater the increase in the concentration of gelatin causes the gelatin solution pH value and the value of surface tension tends to increase. Concentration of 30 wt% gelatin using 10% acetic acid, 15% and 20% and the addition of co-solvent ethylene glycol 1 ml without bead-bead. Nanofiber diameter at a concentration of 30 wt% gelatin in a row is 165 ± 12 nm, 190 ± 31 nm, 190 ± 23 nm. While the results of the gelatin nanofiber FTIR absorption peak is lower than the peak of gelatin powder.

Kata Kunci : Keyword: electrospinning, nanofiber, gelatin, ethylene glycol