Electronic Theses and Dissertation

Nanofiber disintesis dari polimer sintetik PVA dan dikombinasi dengan Carbonized
Polymer Dots (CPDs) yang disintesis dari limbah jaring ikan yang direuse untuk
menyaring PM di udara. CPDs disintesis dari limbah jaring ikan dengan metode
hidrotermal, dan dikarakterisasi dengan UV-Vis, FTIR, dan TEM. Nanofiber
komposit PVA/CPDs telah berhasil disintesis dengan menggunakan metode
electrospinning, dilakukan physical crosslink dengan heat treatment, dan
dikarakterisasi dengan FTIR, SEM, TEM, XRD, dan uji kuat tarik. Parameter
optimum electrospinning untuk sintesis nanofiber PVA/CPDs didapatkan pada
konsentrasi larutan PVA sebesar 15%, laju alir sebesar 16,67 μL/menit, jarak tip ke
kolektor sejauh 15,5 cm, kelembaban sebesar 42-55%, voltase sebesar 26,5 kV, dan
proses sintesis selama 4 jam. CPDs menunjukkan pendaran di bawah sinar UV,
memiliki puncak absorbansi pada panjang gelombang 290; 292; 335; dan 338 nm,
menunjukkan adanya gugus fungsi CPDs pada spektrum FTIR, dengan ukuran
diameter rata-rata 4,97 dan 6,93 nm. Nanofiber komposit PVA/CPDs memiliki ratarata diameter fiber sebesar 321,16 nm dan 297,64 nm, hasil TEM menunjukkan
CPDs terdistribusi pada permukaan nanofiber, pengujian XRD menunjukkan CPDs
tidak mempengaruhi struktur semi kristalin PVA, penambahan CPDs meningkatkan
% elongation nanofiber. Collection Efficiency terbaik terdapat pada nanofiber HTPVA pada penyaringan PM 0,3 μm sebesar 99,6% dan pada penyaringan PM 10 μm
seluruh nanofiber memiliki collection efficiency sebesar 100%.
Kata kunci: nanofiber, Carbonized Polymer Dots, PVA, electrospinning, nilon, heat
treatment, filtrasi udara

Nanofibers were synthesized from synthetic polymer PVA and combined with Carbonized Polymer Dots (CPDs) synthesized from waste fishing nets to filter PM in the air. CPDs were synthesized from waste fishing nets by hydrothermal method, and characterized by UV-Vis, FTIR, and TEM. PVA/CPDs nanofiber composites were successfully synthesized by electrospinning method, physical crosslinking with heat treatment, and characterized by FTIR, SEM, TEM, XRD, and tensile strength tests. The optimum electrospinning parameters for the synthesis of PVA/CPDs nanofibers were obtained at 15% PVA solution concentration, 16.67 μL/min flow rate, 15.5 cm tip-to-collector distance, 42-55% humidity, 26.5 kV voltage, and 4 h synthesis time. The CPDs showed luminescence under UV light, having absorbance peaks at wavelengths of 290; 292; 335; and 338 nm indicating the presence of CPDs functional groups in the FTIR spectrum, with average diameter sizes of 4.97 and 6.93 nm. PVA/CPDs composite nanofiber has an average fiber diameter of 321.16 nm and 297.64 nm, TEM results show CPDs distributed on the nanofiber surface, XRD testing shows CPDs not affect the semi crystalline structure of PVA, the addition of CPDs increases the % elongation of nanofiber. The best collection efficiency was found in HT-PVA nanofiber at 0.3 μm PM filtration of 99.6% and at 10 μm PM filtration all nanofiber had 100% collection efficiency. Keywords: nanofiber, Carbonized Polymer Dots, PVA, electrospinning, nylon, heat treatment, air filtration