Electronic Theses and Dissertation

Emisi gas CO_2 yang terus meningkat mendorong pengembangan adsorben ramah lingkungan. Kondisi ini mendorong pemanfaatan limbah jaring ikan berbahan dasar recycled nilon sebagai bahan untuk pembuatan membran nanofiber. Sintesis membran nanofiber berbasis nilon dimodifikasi dengan penambahan karbon graphene dan CuO menggunakan metode elektrospinning. Penelitian ini bertujuan untuk mengetahui kapasitas adsorpsi membran nanofiber dan pengaruh waktu kontak dan laju alir terhadap kemampuan adsorpsi membran. Kurva Breakthrough curves digunakan untuk melihat titik jenuh membran selama adsorpsi. Karakterisasi yang digunakan adalah SEM-EDX, XRD, dan FTIR. Hasil karakterisasi membran nanofiber komposit berbasis recycled nilon menunjukkan serat yang halus tanpa beads, dengan diameter nanofiber R-nilon sebesar 280,95±40,65 nm, nanofiber R-nilon/graphene sebesar 325,05±84,97 nm, dan nanofiber R-nilon/graphene/CuO sebesar 398,7±99,64 nm. Derajat kristalinitas membran sebesar 74,9% ,77,6%, dan 61,8%. Spektrum FTIR nanofiber R-nilon setelah penambahan CO_2 yang menunjukkan adanya regangan asimetris O=C=O dengan puncak serapan CO_2 terdeteksi pada 2335 cm-1. Pengujian sudut kontak menunjukkan bahwa seluruh membran nanofiber R-nilon komposit memiliki sifat hidrofilik. Nilai C/Co terendah diperoleh pada membran nanofiber R-nilon/graphene/CuO dengan nilai (0 < C/Co > 1) menandakan membran ini efektif untuk penyerapan CO_2.

Kata kunci: nilon, elektrospinning, adsorben, CO_2

Increasing 〖CO〗_2 emissions drive the development of environmentally friendly adsorbents. This has led to the utilization of discarded fishing nets made from recycled nylon as a material for fabricating nanofiber membranes. Nanofiber membranes based on recycled nylon were syntehesized and modified by incorporating graphene carbon and CuO using the electrospinning method. This study aims to evaluate the adsorption capacity of the nanofiber membranes as well as the effect of contact time and flow rate on their adsorption performance. Breakthrough curves were employed to determine the saturation point of the membranes during adsorption. The characterization techniques used include SEM-EDX, XRD, and FTIR. The characterization results of the composite nanofiber membranes based on recycled nylon revealed smooth fibers without beads, with R-nylon nanofiber diameter measuring 280,95±40,65 nm, the R-nylon/graphene 325,05±84,97 nm, and the R-nylon/graphene/CuO 398,7±99,64 nm. The crystallinity degrees of the membranes were determined to be 74,9%, 77,6%, and 61,8% respectively. The FTIR spectrum of the R-nylon nanofiber after 〖CO〗_2 adsorption showed the presence of asymmetric stretching of the O=C=O bond, with the 〖CO〗_2 adsorption peak detected at 2335 cm-1. Contact angle measurements indicated that all composite R-nylon nanofiber membranes exhibited hydrophilic properties. The lowest C/Co value was obtained in the R-nylon/graphene/CuO nanofiber membrane, with a value in the range of (0 < C/Co > 1), indicating that this membrane is effective for 〖CO〗_2 adsorption. Keywords: nylon, electrospinning, adsorbent, 〖CO〗_2