KOMPOSIT NANOFIBER PVA/ALGINAT/ZEOLIT SEBAGAI ADSORBEN CO2

RYAN JONATHAN, Dr. Roto, M.Eng.; Dr. Adhitasari Suratman, M.Si

2016 | Skripsi | S1 KIMIA

Sintesis komposit nanofiber PVA/alginat/zeolit sebagai adsorben CO2 telah dilakukan. Penelitian ini dilakukan untuk meningkatkan kapasitas adsorpsi nanofiber terhadap CO2 dengan cara memodifikasi nanofiber PVA/alginat dengan penambahan zeolit. Tahap pertama diawali dengan mencari kondisi optimum konsentrasi larutan PVA sebagai polimer pendukung. Larutan PVA 10% (b/b) dicampurkan dengan larutan alginat 2% (b/b) pada variasi rasio massa 10,7:1,6; 9,5:3,2; 8,3:4,8, dan 7,1:6,4. Penambahan zeolit 0,5-3% (b/b) dilakukan untuk mensintesis nanofiber PVA/alginat/zeolit. Komposit nanofiber PVA/alginat/zeolit kemudian diuji kapasitas adsorpsinya dengan menggunakan variasi laju alir dan variasi pengaruh penambahan zeolit. Karakterisasi yang dilakukan dalam penleitian ini meliputi uji konduktivitas, FTIR, SEM-EDS, dan SAA. Hasil penelitian menunjukkan nanofiber PVA/alginat dengan penambahan zeolit dapat disintesis menggunakan metode elektrospining. Morfologi dari komposit nanofiber PVA/alginat/zeolit memiliki diameter fiber 250±60 nm dengan luas permukaan 25,998 m2/g. Kapasitas adsorpsi optimal yang dapat diadsorp oleh nanofiber PVA/alginat/zeolit yaitu 10,718 mmol/g. Adsorpsi nanofiber PVA/alginat/zeolit terhadap CO2 mengikuti model isoterm adsorpsi Langmuir dengan energi adsorpsi sebesar 17,53 kJ/mol. Komposit nanofiber PVA/alginat/zeolit dapat menjadi alternatif yang baik dalam mengadsorpsi CO2 karena kapasitasnya yang besar, ramah lingkungan, dan dapat digunakan kembali setelah pemakaian (recycle).

Synthesis of PVA/alginate/zeolite composite nanofibers as an adsorbent for CO2 had been investigated. This work was done to increase the capacity of nanofiber adsorption to CO2 with addition zeolite to modify PVA/alginate nanofibers. The first step was finding the optimum condition of solution concentration of PVA as supporting polymer. Solution of 10% (w/w) PVA was mixed with alginate solution 2% (w/w) a variation of mass ratio of 10,7:1,6; 9,5;3,2; 8,3:4,8, and 7,1:6,4. The optimum condition was then used to modify the nanofiber in addition of zeolite. The addition of zeolite 0,5-3% (w/w) was carried out to make PVA/alginate/zeolite nanofiber. PVA/alginate/zeolite nanofiber was then tested its adsorption capacity using flow rate variation and variation of the effect of zeolite addition. Characterization was conducted by conductivity test, FTIR, SEM-EDS, and SAA. The result showed that modification of the PVA/alginate nanofiber with the addition of zeolite could be done through the electrospinning method. The morphology of PVA/alginate/zeolite composite nanofiber has diameter of 250±60 nm with surface area of 25.998 m2/g. The adsorption capacity that could be adsorbed by PVA/alginate/zeolite nanofiber was 10.718 mmol/g. Adsorption of CO2 on PVA/alginate/zeolite nanofibers was corresponded to Langmuir adsorption isotherm with energy adsorption is 17,53 kJ/mol. PVA/alginate/zeoliteb composite nanofiber could be a good altenative to adsorb CO2 due to its large capacity, environmentaly friendly, and reusable.

Kata Kunci : nanofiber, PVA/alginate, zeolite, CO2 adsorption