Mikropori Epoxified- polyethersulfone gabungan membran (EPES membran) telah disediakan melalui kering-basah fasa penyongsangan. Kajian ini bertujuan untuk mengaitkan perubahan dalam membran fizikal dan sifat kimia apabila komposisi yang berbeza (30wt%, 50wt%, 70wt% dan 90wt %) daripada BisphenolA ether diglycidyl (BADGE) telah ditambah ke dalam membran PES itu. Membran disintesis digunakan untuk memisahkan kromium (VI) karsinogen. Kemudian, analisis daripada spektroskopi inframerah transformasi fourier (FTIR) telah membuktikan kemunculan puncak epoksi yang menunjukkan kejayaan integrasi resin epoksi ke dalam matriks polimer. Mikroskop elektron pengimbas (SEM) telah menunjukkan struktur liang jari seperti dalam PES kemas dan span struktur liang dalam membran EPES. Oleh itu, macrovoid menjadi lebih serius dengan penambahan komposisi BADGE. Selain itu, kelikatan larutan bagi setiap formula didapati lebih rendah apabila lebih BADGE ditambah dan menjelaskan fenomena lihat di dalam SEM kerana kelikatan akan memberi kesan kepada kadar penyebaran NMP pelarut semasa fasa penyongsangan. Kelikatan yang lebih rendah membolehkan kadar resapan yang lebih tinggi dan dengan itu menambah serius fenomena macrovoid. Sebagai prestasi membran, meresap fluks meningkat dengan pengurangan fouling apabila komposisi BADGE telah meningkat. 30wt% daripada membran BADGE / PES menunjukkan penolakan tertinggi Cr (VI) ion di 83.73% dengan fluks meresap 1.52 L / m2.min. Dalam karya ini, satu lagi jenis epoxy resin- Glycidyl metakrilat (GMA) juga digunakan sebagai bahan tambahan dan membandingkan prestasi dengan membran BADGE / PES. Dengan itu, ia telah mendapati bahawa fluks awal yang sangat tinggi pada 89.312 L / m2.min tetapi penolakan sangat rendah pada 19.08% telah ditunjukkan. Melalui analisis FTIR, GMA puncak telah gagal hadir, menunjukkan sebahagian besar daripada resin epoksi itu fluxed keluar semasa sintesis membran. Ia adalah disebabkan oleh kelarutan GMA yang tinggi dalam air berbanding dengan BADGE.
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A microporous epoxy resin epoxified-polyethersulfone (EPES) blend membrane (EPES membrane) was prepared through dry-wet phase inversion. This study attempts to correlate the changes in membrane physical and chemical properties when different composition (30wt%, 50wt%, 70wt% and 90wt %) of bisphenol A diglycidyl ether (BADGE) were added into the PES membrane. The synthesised membrane was used to separate the carcinogen chromium (VI). Analysis from fourier transform infrared spectroscopy (FTIR) has proved the present of the epoxy peak which indicated the successful integration of the epoxy resin into the polymer matrix. Scanning electron microscopy (SEM) showed the finger-like pore structure in neat PES and sponge structure pore in EPES membrane. Also, the macrovoid became more significant as the composition of BADGE increases. Moreover, the viscosity of the dope solution of each formula were found lower when more BADGE added which explain the phenomenon observe in SEM as viscosity will affect the rate of diffusion of NMP solvent during phase inversion. The lower viscosity allow the rate of diffusion higher and thus increased the macrovoid phenomenon. As the performances of the membranes, permeate flux increased with reduction of fouling when composition of BADGE was increased. 30wt% of BADGE/PES membrane show highest rejection of Cr (VI) ions at 83.734% with permeated flux of 1.52 L/m2.min. In this work, another type of epoxy resin- Glycidyl methacrylate (GMA) was also used as the additive and compare the performance with BADGE/PES membrane. The GMA-PES membrane demonstrated very high initial flux of 89.312 L/m2.min but very low rejection at 19.067%. Through FTIR analysis, GMA peak was failed to appear, indicated most of the epoxy resin was fluxed out during the membrane synthesis. It was due to the high solubility of GMA in water as compared to BADGE.
Capability of adsorptive expoxified poly(ethersulfone) membrane to separate chromium ions / Tan Ying Shien