High‐Precision and High‐Flux Separation by Rationally Designing the Nanochannels and Surface Nanostructure of Polyamide Nanofiltration Membranes
نویسندگان
چکیده
High‐precision separation with increased water permeability is critical for efficient membrane‐based treatment processes. To achieve high selectivity toward different targeted species while allowing rapid transportation, the structure of membrane polyamide selective layer requires delicate regulation. Herein, an effective approach to systematically expand pore size layers by incorporating ammonium ion‐modified carbon dots (CDs) into network developed. The ions alkyl chain lengths attached CDs create nanochannels sizes in lower energy barrier transportation maintaining species. When length reaches eight atoms (i.e., C 8 ions), amphiphilic ‐CDs induce formation ridged nanostructure on surface and hence filtration area. resultant thin‐film nanocomposite (TFN) membrane, denoted as TFN‐C demonstrates a higher Na 2 SO 4 rejection 98.9% NaCl/Na 83.1 than pristine together tripled pure 29.0 L m −2 h −1 bar . viable ingeniously designing membranes more processes provided.
منابع مشابه
Improved antifouling properties of polyamide nanofiltration membranes by reducing the density of surface carboxyl groups.
Carboxyls are inherent functional groups of thin-film composite polyamide nanofiltration (NF) membranes, which may play a role in membrane performance and fouling. Their surface presence is attributed to incomplete reaction of acyl chloride monomers during the membrane active layer synthesis by interfacial polymerization. In order to unravel the effect of carboxyl group density on organic fouli...
متن کاملInfluence of formulated chemical cleaning reagents on the surface properties and separation efficiency of nanofiltration membranes
This study investigated the impact of two caustic and one acidic cleaning formulations (namely MC11, PC98, and MC3, respectively) on the properties and separation efficiency of three different nanofiltration (NF) membranes (namely NF270, NF90 and TFC-SR100). Overall, the impact of chemical cleaning on surface properties and rejection was membrane and cleaning reagent specific. It was driven mos...
متن کاملthe study of bright and surface discrete cavity solitons dynamics in saturable nonlinear media
امروزه سالیتون ها بعنوان امواج جایگزیده ای که تحت شرایط خاص بدون تغییر شکل در محیط منتشر می-شوند، زمینه مطالعات گسترده ای در حوزه اپتیک غیرخطی هستند. در این راستا توجه به پدیده پراش گسسته، که بعنوان عامل پهن شدگی باریکه نوری در آرایه ای از موجبرهای جفت شده، ظاهر می گردد، ضروری است، زیرا سالیتون های گسسته از خنثی شدن پراش گسسته در این سیستم ها بوسیله عوامل غیرخطی بوجود می آیند. گسستگی سیستم عامل...
ذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Small science
سال: 2022
ISSN: ['2688-4046']
DOI: https://doi.org/10.1002/smsc.202200026