Hydrophilic ultrafiltration membranes with surface-bound eosin Y for an integrated synthesis-separation system of aqueous RAFT photopolymerization

2020 ◽  
Vol 8 (19) ◽  
pp. 9825-9831
Author(s):  
Yujie Zhao ◽  
Senlin Shao ◽  
Jiangbin Xia ◽  
Ya Huang ◽  
Yu Chi Zhang ◽  
...  
Keyword(s):  
Membrane Separation ◽  
Raft Polymerization ◽  
Ultrafiltration Membrane ◽  
Separation Process ◽  
Eosin Y ◽  
Separation System ◽  
Ultrafiltration Membranes

The photocatalyst-based ultrafiltration membrane fitted integrated synthesis–separation system holds the promises to bridge the gap between the precision of PET-RAFT polymerization and the efficiency of membrane separation process.

PEMBUATAN MEMBRAN ULTRAFILTRASI DARI POLIMER SELULOSA ASETAT DENGAN METODE INVERSI FASA

Konversi ◽  
2018 ◽  
Vol 6 (1) ◽  
pp. 11 ◽  
Author(s):  
Agus Mirwan ◽  
Vera Indriyani ◽  
Yunita Novianty
Keyword(s):  
Water Treatment ◽  
Membrane Separation ◽  
Drinking Water Treatment ◽  
Ultrafiltration Membrane ◽  
Ultrafiltration Membranes ◽  
Membrane Pore ◽  
Running Water ◽  
Water Treatment Process ◽  
Rejection Coefficient ◽  
Pass Through

Abstrak- Pengolahan air bersih dengan teknologi membran merupakan proses pengolahan air dengan kualitas yang sangat baik dan sesuai untuk pengolahan air minum di negara-negara berkembang karena membran memiliki banyak sekali keunggulan. Salah satu jenis operasi pemisahan membran adalah dengan membran ultrafiltrasi. Ultrafiltrasi merupakan proses penyaringan partikel-partikel dalam rentang ukuran koloid, yaitu larutan dan molekul besar ditahan dipermukaan membran dan zat terlarut dengan ukuran sangat kecil dapat melewati membran. Tujuan dari penelitian ini adalah untuk menentukan komposisi % berat dimetilformamida pada pembuatan membran ultrafiltrasi yang terbaik. Membran ultrafiltrasi ini dibuat dengan memvariasikan konsentrasi aditif dimetilformamida yang berfungsi untuk penentuan ukuran pori membran dan konsentrasi aseton. Pencampuran bahan dilakukan dengan pengadukan selama ± 6 jam, hasil cetakan film polimer dikoagulasi selama 1 jam dalam air es (± 4°C) kemudian dicuci dengan air mengalir dan disimpan dalam wadah yang diberi formalin. Kemudian dilakukan pengujian pada membran tersebut menggunakan air gambut dimana permeat yang dihasilkan di ukur volumenya setiap selang waktu 5 menit untuk menentukan fluks membrannya. Kemudian dilakukan analisa terhadap konsentrasi permeat  untuk menentukan koefisien rejeksi, di mana rejeksi yang diharapkan adalah > 90%. Berdasarkan hasil penelitian, membran ultrafiltrasi yang terbaik adalah membran dengan komposisi % berat dimetilformamida 20; 24 dan 28 dimana koefisien rejeksi rata-rata yang diperoleh masing-masing adalah 98,15; 92,80 dan 95,41%. Kata kunci: dimetilformamida, koefisien rejeksi, fluks Abstract-Clean water treatment with membrane technology is a water treatment process with very good quality and suitable for drinking water treatment in developing countries because the membrane has a lot of advantages. One type of membrane separation operation is with ultrafiltration membranes. Ultrafiltration is a process of filtering particles in the size range of colloids, namely liquid while large molecules detained on the surface of the membrane and the solute with very small size can pass through the membrane. The purpose of this study was to determine the best composition of %wt of dimethylformamide in the manufacture of ultrafiltration membranes. Ultrafiltration membrane is made by varying the concentration of the additive of  dimethylformamide which serves for the determination of membrane pore size and the concentration of acetone. Mixing materials done by stirring for ± 6 hours, polymer film printouts is coagulated  for 1 hour in ice water (± 4 ° C) and then washed with running water and stored in a container containing formalin. Then conducted testing on the membrane using peat water where permeate that generated is measured the volume of each interval of 5 minutes to determine the membrane flux. Then analyzing the concentration of permeate to determine the coefficient of rejection, where the expected rejection is> 90%. Based on the research results, the best ultrafiltration membrane was membrane with  composition wt% of dimethylformamide of 20; 24 and 28, where rejection coefficient average respectively was 98.15; 92.80 and 95.41%. Keywords: dimethylformamide, rejection coefficient, flux

PEMBUATAN MEMBRAN ULTRAFILTRASI DARI POLIMER SELULOSA ASETAT DENGAN METODE INVERSI FASA

Konversi ◽  
2017 ◽  
Vol 6 (1) ◽  
pp. 11
Author(s):  
Vera Indriyani ◽  
Yunita Novianty ◽  
Agus Mirwan
Keyword(s):  
Water Treatment ◽  
Membrane Separation ◽  
Drinking Water Treatment ◽  
Ultrafiltration Membrane ◽  
Ultrafiltration Membranes ◽  
Membrane Pore ◽  
Running Water ◽  
Water Treatment Process ◽  
Rejection Coefficient ◽  
Pass Through

Abstrak- Pengolahan air bersih dengan teknologi membran merupakan proses pengolahan air dengan kualitas yang sangat baik dan sesuai untuk pengolahan air minum di negara-negara berkembang karena membran memiliki banyak sekali keunggulan. Salah satu jenis operasi pemisahan membran adalah dengan membran ultrafiltrasi. Ultrafiltrasi merupakan proses penyaringan partikel-partikel dalam rentang ukuran koloid, yaitu larutan dan molekul besar ditahan dipermukaan membran dan zat terlarut dengan ukuran sangat kecil dapat melewati membran. Tujuan dari penelitian ini adalah untuk menentukan komposisi % berat dimetilformamida pada pembuatan membran ultrafiltrasi yang terbaik. Membran ultrafiltrasi ini dibuat dengan memvariasikan konsentrasi aditif dimetilformamida yang berfungsi untuk penentuan ukuran pori membran dan konsentrasi aseton. Pencampuran bahan dilakukan dengan pengadukan selama ± 6 jam, hasil cetakan film polimer dikoagulasi selama 1 jam dalam air es (± 4°C) kemudian dicuci dengan air mengalir dan disimpan dalam wadah yang diberi formalin. Kemudian dilakukan pengujian pada membran tersebut menggunakan air gambut dimana permeat yang dihasilkan di ukur volumenya setiap selang waktu 5 menit untuk menentukan fluks membrannya. Kemudian dilakukan analisa terhadap konsentrasi permeat  untuk menentukan koefisien rejeksi, di mana rejeksi yang diharapkan adalah > 90%. Berdasarkan hasil penelitian, membran ultrafiltrasi yang terbaik adalah membran dengan komposisi % berat dimetilformamida 20; 24 dan 28 dimana koefisien rejeksi rata-rata yang diperoleh masing-masing adalah 98,15; 92,80 dan 95,41%. Kata kunci: dimetilformamida, koefisien rejeksi, fluks Abstract-Clean water treatment with membrane technology is a water treatment process with very good quality and suitable for drinking water treatment in developing countries because the membrane has a lot of advantages. One type of membrane separation operation is with ultrafiltration membranes. Ultrafiltration is a process of filtering particles in the size range of colloids, namely liquid while large molecules detained on the surface of the membrane and the solute with very small size can pass through the membrane. The purpose of this study was to determine the best composition of %wt of dimethylformamide in the manufacture of ultrafiltration membranes. Ultrafiltration membrane is made by varying the concentration of the additive of  dimethylformamide which serves for the determination of membrane pore size and the concentration of acetone. Mixing materials done by stirring for ± 6 hours, polymer film printouts is coagulated  for 1 hour in ice water (± 4 ° C) and then washed with running water and stored in a container containing formalin. Then conducted testing on the membrane using peat water where permeate that generated is measured the volume of each interval of 5 minutes to determine the membrane flux. Then analyzing the concentration of permeate to determine the coefficient of rejection, where the expected rejection is> 90%. Based on the research results, the best ultrafiltration membrane was membrane with  composition wt% of dimethylformamide of 20; 24 and 28, where rejection coefficient average respectively was 98.15; 92.80 and 95.41%. Keywords: dimethylformamide, rejection coefficient, flux 

FOULED ON THE PLAY: LONG TERM MEMBRANE SEPARATION PROCESS OPERATION REVEALS CHALLENGES AND SOLUTIONS

2004 ◽  
Vol 2004 (10) ◽  
pp. 233-237
Author(s):  
Scott E. Parker ◽  
Gary C. Deis ◽  
Phillip Quigley ◽  
D.G. Woodward ◽  
Kurtis J. Montegna
Keyword(s):  
Membrane Separation ◽  
Separation Process ◽  
Process Operation

Ecological cost accounting applied to the sewage reuse by membrane separation process

2011 ◽  
Author(s):  
K. C. Passarini ◽  
F. A. Calarge ◽  
T. M. F. Brito ◽  
R. M. Vanalle ◽  
E. B. Tambourgi ◽  
...  
Keyword(s):  
Membrane Separation ◽  
Cost Accounting ◽  
Separation Process ◽  
Sewage Reuse ◽  
Ecological Cost

Modeling and Simulation of Clamp Band Dynamic Envelope in a LV/SC Separation System

2011 ◽  
Vol 141 ◽  
pp. 359-363 ◽  
Author(s):  
Jun Lan Li ◽  
Shao Ze Yan ◽  
Xue Feng Tan
Keyword(s):  
Friction Coefficient ◽  
Modeling And Simulation ◽  
Band System ◽  
Separation Process ◽  
Impact Behavior ◽  
Separation System ◽  
Lumped Mass ◽  
Lumped Mass Method ◽  
Simulation Results ◽  
Contact Impact

The clamp band system is a typical locked and separated device of the launch vehicle (LV) / the spacecraft (SC), and its release-separation process is one of the important factors that affect the LV/SC separation movement. A nonlinear spring-damper model was employed to describe the contact-impact behavior between the V-segment of the clamp band and the LV/SC interface, and lumped mass method was used to depict the clamp band. By using ADAMS, a dynamic model of the clamp band system was established. The simulation results show that the impulse of the explosive bolts and the stiffness of lateral-restraining springs have significant effects on the clamp band dynamic envelope. The shock of the satellite-vehicle separation is very vulnerable to the clamp band pretension and the friction coefficient between the V-segment and the LV/SC interface.

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