KARAKTERISASI SERAT NANO PVA/AQUADES PADA BERBAGAI KONSENTRASI UNTUK PENYEJAJARAN ARAH MOLEKUL KRISTAL CAIR MENGGUNAKAN METODE ELEKTROSPINNING DENGAN KOLEKTOR TEMBAGA; CHARACTERIZATION OF PVA/AQUADES NANOFIBERS ON VARIATION OF CONCENTRATION FOR LIQUID CRYSTAL MOLECULES ALIGNMENT USING ELECTROSPINNING METHODS WITH COPPER COLLECTORS

Jahidah, Khannah, Yusril Yusuf

2015 | Skripsi | FMIPA

Alignment nanofiber polyvinyl alcohol (PVA)/aquades has been succesfully prepared by electrospinning method using copper (Cu) parallel collector. The concentration of PVA were varied from 11%, 13%, 15%, 17%, and 19%. The result showed that the smallest diameter was (265±63) nm and obtained at 11% of concentration. The biggest diameter was (619±58) nm and obtained at 19% of concentration. In this study showed that diameter of nanofibers increase as increasing concentration of PVA. The scaling exponent of pva was also calculated. The result showed that in this experiment, the value of scaling exponent is 1,6. The orientation parameter of nanofibers (S) at all concentrations was also calculated. Results showed that orientation parameter were on values around 0,99-1. These nanofibers were used The orientation parameter of nanofibers (S) at all concentrations was also calculated. Results showed that orientation parameter were on values around 0,99-1. These nanofibers were used to align liquid crystal of 4-methoxybenzilidene-4-butylaniline (MBBA). The image of the sample was observed using Optical Microscopy Polarazing (OPM). Result showed there are bright and dark patterns of the sample.

Kata Kunci : electrospinning, nanofiber, parallel collector, alignment, concentration, orientation parameter, liquid crystal