Development of nanofiltration membranes through surface modification of polysulfone based ultrafiltration membranes
tarafından
 
Bar, Canbike, author.

Başlık
Development of nanofiltration membranes through surface modification of polysulfone based ultrafiltration membranes

Yazar
Bar, Canbike, author.

Yazar Ek Girişi
Bar, Canbike, author.

Fiziksel Tanımlama
xi, 65 leaves: illustrarions, charts;+ 1 computer laser optical disc.

Özet
Stimuli responsive membranes have been used for suppressing fouling and regulating selectivity in different applications. These types of membranes are usually manufactured in thin film composite structure by either polymerizing stimuli-responsive monomer or coating stimuli-responsive polymer on a support. Responsiveness is due to their characteristic features which rely on reversible changes in mass transfer and interfacial properties as a result of changes in external environment such as pH, temperature and ionic strength. In this study, a pentablock copolymer (PBC) which consists of temperature responsive Pluronic F127 (PEO-b-PPO-b-PEO) in the middle block and pH responsive poly(N,N-(diethylamino)ethyl methacrylate) (PDEAEM) in the end blocks was used for designing a new type of thin film composite (TFC) nanofiltration membrane. The support of the composite membrane was prepared from a blend of polysulfone/sulfonated polyethersulfone using nonsolvent induced phase separation and the PBC was attached to the support via electrostatic interaction. The conformation of grafted PBC chains was determined by adsorption studies. The effects of PDEAEM block length, concentration of the copolymer and adsorption time on the adsorbed amount were investigated. Among three copolymer samples investigated (15, 20 and 25 kDa), the 25 kDa PBC displayed the highest responsiveness, thus, rejection properties were determined for the membranes prepared only from this sample. The influences of operation pH and temperature on the structure integrity of the membrane were investigated with pure water permeability measurements and the change in pore size was assessed by determining rejection of neutral solutes by the membranes. The membranes were further characterized with SEM, AFM, contact angle, XPS and zeta potential measurements. It was demonstrated that a new pH and temperature responsive, high flux TFC NF membrane was manufactured.

Konu Başlığı
Nanofiltration.
 
Membrane separation.

Yazar Ek Girişi
Alsoy Altınkaya, Sacide,

Tüzel Kişi Ek Girişi
İzmir Institute of Technology. Chemical Engineering.

Tek Biçim Eser Adı
Thesis (Master)--İzmir Institute of Technology: Chemical Engineering.
 
İzmir Institute of Technology: Chemical Engineering--Thesis (Master).

Elektronik Erişim
Access to Electronic Versiyon.


KütüphaneMateryal TürüDemirbaş NumarasıYer NumarasıDurumu/İade Tarihi
IYTETezT001697TP248.25.M46 B223 2017Tez Koleksiyonu