Takashi Hayashita
Department of Materials and Life Sciences Faculty of Science and Technology, Sophia University, Kioicho, Chiyoda-ku, Tokyo 102-8554

Published : 3 Documents
Articles

Found 3 Documents
Search

KAJIAN SPEKTRA FTIR PADA MEMBRAN KOPOLI (EUGENOL-DIVINILBENZENA), CO-EDVB SEBAGAI SENYAWA PEMBAWA UNTUK TRANSPOR FENOL Kiswandono, Agung Abadi; Girsang, Ermi; Pulungan, Ahmad Nasir; Sihombing, Juniva Laila; Siswanta, Dwi; Aprilita, Nurul Hidayat; Santosa, Sri Juari; Hayashita, Takashi
Prosiding SNPS (Seminar Nasional Pendidikan Sains) 2015: Prosiding SNPS (Seminar Nasional Pendidikan Sains)
Publisher : Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (33.496 KB)

Abstract

Telah dilakukan kajian transpor fenol melalui membran berbasis senyawa divinil benzena (DVB)tertaut silang dengan metode PIM.Kajian transpor fenol ini menggunakan chamber sebagai alat transpor yang memisahkan fasa sumber dan fasa penerima. Beberapa evaluasi yang mempengaruhi transpor menggunakan membran PIMtelah dilakukan diantaranya adalah uji stabilitas membran, umur membrandan pemakaian berulang kemudian membran PIM sebelum dan setelah transpor dikarakterisasi menggunakan FTIR. Hasil penelitian menunjukkan bahwa membran PIM yang mengandung senyawa tertaut silang co-EDVB ini, kecepatan pengadukan, jenis agen tertaut silang, konsentrasi plasticizer dan garam NaNO3 berpengaruh terhadap hilangnya komponen penyusun membran (ML loss). Berdasarkan hasil FT-IR, didapatkan bahwa membran yang mengandung senyawa pembawa dienaini, komponen penyusun membran yang hilang didominasi oleh senyawa pembawanya sedangkan indikasi hilangnya komponen penyusun membran dapat terlihat pada hasil FT-IR setelah digunakan untuk transpor, yakni hilangnya puncak ‒OH pada spektra FT-IR.
THE INFLUENCE OF PVA.cl.CITRIC ACID/CHITOSAN MEMBRANE HYDROPHICILITY ON THE TRANSPORT OF CREATININE AND UREA Lusiana, Retno Ariadi; Siswanta, Dwi; Mudasir, Mudasir; Hayashita, Takashi
Indonesian Journal of Chemistry Vol 13, No 3 (2013)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (537.622 KB) | DOI: 10.22146/ijc.21286

Abstract

The influence of cross-linking and membrane hydrophilicity on the transport rate had been studied using a membrane prepared from a mixture of chitosan/PVA cross-linked citric acid (PVA.cl.CA) for creatinine and urea transport. The optimum mole ratio of PVA:citric acid as well as the best composition of chitosan:PVA.cl.CA were determined using creatinine transport study. Using the optimum compositions, further study was done using different thickness of the membrane in transporting creatinine, urea and a mixture of 3 species (creatinine, urea and vitamin B12). Membrane characterization was done using FT-IR spectrophotometer, water absorption test, TG/DTG and SEM. The results showed that the optimum composition PVA:citric acid was obtained to be 90:1, having % WU of 113.74% and creatinine transport percentage of 18.16%. Meanwhile, the optimum composition of chitosan:PVA.cl.CA was found at 4:6 ratio having % WU and % transport of 136.67% and 24.26%, respectively. The optimum transport capacity was found for membrane thickness of 50 µm with WU% at 139.61% and the percent transport of creatinine and urea each was 38.93% and 60.36%. The presence vitamin B12 in the solution of is proved to disturb the transport of creatinine and urea through the membrane. Finally, hydrophilicity seemed to give substantial contribution in the transport process as well as the mechanical strength of the membrane.
EXTENDING THE LIFE TIME OF POLYMER INCLUSION MEMBRANE CONTAINING COPOLY(EUGENOL-DVB) AS CARRIER FOR PHENOL TRANSPORT Kiswandono, Agung Abadi; Siswanta, Dwi; Aprilita, Nurul Hidayat; Santosa, Sri Juari; Hayashita, Takashi
Indonesian Journal of Chemistry Vol 13, No 3 (2013)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (844.034 KB) | DOI: 10.22146/ijc.21285

Abstract

A study of phenol transport was conducted in correlation to the evaluation of copoly(eugenol-divinylbenzene, DVB) as carrier using polymer inclusion membrane (PIM) method. The performance of copoly(eugenol-DVB) was observed based on the parameters of Membrane Liquid (ML) loss. Some variations, including the effect of plasticizer concentration, stirring speed, and measurement of lifetime of the membrane, were studied. Related to the lifetime, the effect of the concentration of NaNO3 salt was also studied. The tensile strength of membrane before and after the transport was measured and their morphology was characterized using SEM (Scanning Electron Microscope). Results of the study indicate that the value of the tensile strength of the membrane after the transport was lower than that before the transport. The lifetime of the membrane was not only depending on the capacity of the membrane in restraining ML loss, but also on the concentration of salt that was added to the solution of source phase. In addition, the lifetime of the membrane had correlation to the number of ML loss, i.e. the addition of salt lead to lower amount of ML loss and gave longer lifetime. With the addition of 0.1 M NaNO3, the lifetime of the membrane extended to 62 days, which is longer than the lifetime without the addition of NaO3 which was only 7 days.