Nanofiber selulosa adalah serat alami yang berukuran 10-100 nm dan dapat diekstraksi dari selulosa. Kulit buah nipah (Nypa futricans) mengandung selulosa sehingga berpotensi disintesis menjadi nanofiber selulosa. Penelitian ini bertujuan untuk menentukan karakteristik nano fiber selulosa dari kulit buah nipah meliputi rendemen, gugus fungsi FTIR dan ukuran partikel. Tahapan dalam penelitian ini meliputi preparasi sampel, sintesis nanofiber selulosa dan uji laboratorium. Data yang diperoleh dianalisis secara deskriptif. Hasil penelitian menunjukkan bahwa nanofiber selulosa yang disintesis dari kulit buah nipah menghasilkan rendemen sebesar 17,67%, ukuran partikel sebesar 53,48 nm serta menunjukkan gugus-gugus fungsi selulosa. Kulit buah nipah (Nypa fruticans) berpotensi digunakan sebagai bahan baku dalam sintesis nanofiber selulosa.
Kata Kunci : FTIR; PSA; Rendemen; Sintesis; Sonikasi

cellulose nanofibers are natural fibers with dimensions typically ranging from 10 to 100 nm and can extracted from cellulose. Due to its cellulose content, the skin of the nipa palm fruit ( Nypa Fruticans) present significant potential as a raw material for synthesizing cellulose nanofibers. This study aimed to determine the characteristics of cellulose nanofibers from nipa palm fruit skin including yield, FTIR functional group, and particle size. The study was conducted through a series of stages, including sample preparation, cellulose nanofibers synthesis, and laboratory testing. The data obtained were analyzed descriptively to evaluate the efficiency and quality of the extraction process. The findings showed that the cellulose nanofibers synthesis from nipa palm fruit skin produced a yield of 17,67 %, with an average particle size of 53,48 nanometers, and exhibited functional groups characteristic of cellulose, as confirmed by FTIR analysis. The results highlighted the potential of nipa palm friut skin as a practicable and biodegradable source of cellulose nanofibers, paving the way for its utilization in various industrial and technological applications. Keywords: FTIR, PSA, Yield, Synthesis, Sonications