KAJIAN SIFAT OPTIK SAMPEL KRISTAL CAIR YANG TERORIENTASI SEJAJAR MENGGUNAKAN SERAT NANO; OPTICAL PROPERTIES STUDY OF LIQUID CRYSTAL SAMPLES WHICH ARE PARALLEL ORIENTED BY NANOFIBERS
Kusumasari, Ervanggis Minggar, Yusril Yusuf
2015 | Skripsi | FMIPA UGMOptical properties study of nematic liquid crystals 4-methoxybenzylidene-4-butylaniline (MBBA) and 4-cyano-4’-pentylbiphenyl (5 CB) which are parallel oriented by nanofiber has been successfully performed. Planar samples of liquid crystals were made using polyvinyl alcohol (PVA) nanofiber from electrospinning process. Copper (Cu) was used as gap collector in electrospinning process. These planar samples area are 15 mm x 25 mm. Optical characteristic of these samples were studied by using optical polarizing microscope. The rotation angle of these samples were varied. The results showed different pattern in each angle (?). The brightest pattern was obtained at angles 45o, 135o, 225o, and 315o. The darkest pattern was obtained at angles 0o, 90o, 180o, and 270o. The result shows that alignment of liquid crystal molecules can be performed using nanofiber. This method can be used to replace rubbing method, which is molecular alignment method using a velvet cloth roller drawn in one particular direction.
Kata Kunci : nematic liquid crystal; optical properties of planar sample; electrospinning; nanofiber.
