NANOFIBER ALGINAT/POLIETILEN OKSIDA/TRITON X-100 SEBAGAI ADSORBEN CO2

FARYDA VERONICA, Dr.rer.nat. Adhitasari Suratman,M.Si; Dr. Suyanta, M.Si

2017 | Tesis | S2 Ilmu Kimia

Penelitian tentang sintesis nanofiber Alginat/Polietilen oksida/Triton X-100 (Alg/PEO/TX Nfs) dengan metode electrospinning untuk adsorpsi CO2 telah dilakukan. Penelitian ini bertujuan untuk memperoleh komposisi Alg/PEO yang dapat menghasilkan serat tanpa manik-manik, pengaruh penambahan PEO dan TX terhadap electrospinnability larutan, pengaruh laju alir dan waktu kontak terhadap kapasitas adsorpsi, serta kajian isoterm adsorpsi CO2 oleh Alg/PEO/TX Nfs. Larutan polimer dikarakterisasi dengan conductivity meter dan tensiometer, sedangkan nanofiber dianalisis menggunakan FTIR, SEM, SAA dan testing machine. Kajian adsorpsi CO2 pada nanofiber meliputi pengaruh laju alir dan waktu kontak CO2 terhadap nanofiber, kemudian dipelajari isoterm adsorpsinya. Hasil penelitian menunjukkan bahwa Alg/PEO/TX Nfs tanpa manik-manik berhasil disintesis dari larutan Alg/PEO dengan perbandingan volume 1:2 serta penambahan 0,5% TX. Nanofiber yang dihasilkan berdiameter 201,567 ± 48 nm, dan memiliki ketahanan mekanik serta luas permukaan sebesar 0,524 MPa dan 34,963 m2 g-1. Kapasitas adsorpsi optimum diperoleh pada laju 10 mL menit-1 dengan waktu kontak 25 menit yaitu 12,398 mmol g-1. Adsorpsi CO2 oleh Alg/PEO/TX Nfs mengikuti model isoterm Langmuir.

Synthesis of alginate/PEO/Triton X-100 (Alg/PEO/TX Nfs) nanofiber by electrospinning method for CO2 adsorption has been conducted. This study aimed to obtain a composition of Alg/PEO to produce nanofiber without beads, to observe the effect of adding PEO and Triton X-100 (TX) toward electrospinnability solution, to observe the effect of flow rate and contact time toward adsorption capacity, and to study the adsorption isotherms of CO2 by Alg/PEO/TX Nfs. The polymer solution was characterized by a conductivity meter and tensiometer, while nanofiber was analyzed by using FTIR, SEM, SAA and mechanical test equipment. The study of CO2 adsorption on nanofiber consist of the effect of flow rate and contact time of CO2 to the nanofiber, afterwards the adsorption isotherms and reaction kinetics were reviewed. The result showed that Alg/PEO/TX Nfs without beads was successfully synthesized from a mixture solution of Alg/PEO with the volume ratio of 1:2, and the addition of 0.5% (v/v) TX. The diameter of synthesized nanofiber, the mechanical resistance, and the surface area were 201.567 ± 48 nm, 0.524 Mpa and 34.963 m2 g-1, respectively. The optimum adsorption capacity was 12,398 mmol g-1, obtained at the flow rate of 10 mL min-1 and contact time of 25 minutes. The adsorption of CO2 by Alg/PEO/TX Nfs followed Langmuir isotherm.

Kata Kunci : nanofibers, electrospinning, alginate, PEO, CO2