Effect of Solvent Combination on Electrospun Stereocomplex Polylactic Acid Nanofiber Properties

Penulis: Melati Septiyanti, Athanasia Amanda Septevani, Muhammad Ghozali, Sri Fahmiati, Evi Triwulandari, Witta Kartika Restu, Yenny Meliana, Takuya Matsumoto and Takashi Nishino
Polylactic acid (PLA) has been known as bio‐based polymer for the development of bioplastic with promising properties such as biodegradable, biocompatible, non‐toxic, and renewable. However, its low thermal properties have limited its applications. Thus, in this study stereocomplex PLA (sc‐PLA) is investigated with the aim to improve thermal properties by mixing poly L‐lactic acid (PLLA) and poly D‐lactic acid (PDLA) in solution blend combination via electrospinning. The electrospun sc‐PLA fiber is prepared in combination of chloroform (CHCl3), N,N‐dimethylformamide, and hexafluoroisopropanol (HFIP). The effect of solvents in the properties of sc‐PLA is analyzed using Fourier‐transform infrared spectroscopy and X‐ray diffraction (XRD) to understand chemical interaction between PLLA and PDLA. Differential scanning calorimetry and thermo gravimetric analyzer is used to understand the thermal properties of sc‐PLA. It is found that the optimum solvent combination for sc‐PLA nanofiber is CHCl3/HFIP 9:1 with the smallest nanofiber diameter 39.7 nm and the melting point improved by 47 °C compared with neat PLA due to stereocomplexation between PLLA and PDLA.

Macromol. Symp. 2020, 391, 1900134

DOI: https://doi.org/10.1002/masy.201900134

No. Arsip : LIPI-20200915