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Surface Modification of TFC-PA RO Membrane by Grafting Hydrophilic pH Switchable Poly(Acrylic Acid) Brushes
المؤلفون المشاركون
Zhu, Shenmin
Ahmad, Nasir M.
Cheema, Waqas
Abbas, Muhammad Asad
Mushtaq, Shehla
Qiblawey, Hazim
Li, Yao
Zhang, Runnan
Wu, Hong
Jiang, Zhongyi
Sadiq, Rehan
المصدر
Advances in Polymer Technology
العدد
المجلد 2020، العدد 2020 (31 ديسمبر/كانون الأول 2020)، ص ص. 1-12، 12ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2020-05-22
دولة النشر
مصر
عدد الصفحات
12
التخصصات الرئيسية
الملخص EN
The grafting of pH-responsive poly(acrylic acid) (PAA) brushes was carried out on the surface of a commercial TFC-PA membrane using surface-initiated atom transfer radical polymerization (SI-ATRP).
Poly(t-butyl acrylate) was polymerized through the SI-ATRP method followed by its acid hydrolysis to form PAA hydrophilic polymer brushes.
Surface morphology, permeation flux, salt rejection, and pore sizes were investigated.
The contact angle for water was reduced from 50° for a pristine membrane to 27° for the modified membrane due to a modification with the hydrophilic functional group and its brush on membrane surfaces.
The flux rate also increased noticeably at lower pH values relative to higher pH for the modified membranes, while the flux remains stable in the case of pristine TFC-PA membranes.
There is slight transition in the water flux rate that was also observed when going from pH values of 3 to 5.
This was attributed to the pH-responsive conformational changes for the grafted PAA brushes.
At these pH values, ionization of the COOH group takes place below and above pKa to influence the effective pore dimension of the modified membranes.
At a lower pH value, the PAA brushes seem to permit tight structure conformation resulting in larger pore sizes and hence more flux.
On the other hand, at higher pH values, PAA brushes appeared to be in extended conformation to induce smaller pore sizes and result in less flux.
Further, pH values were observed to not significantly affect the NaCl salt rejection with values observed in between 98.8% and 95% and close to that of the pristine TFC-PA membranes.
These experimental results are significant and have immediate implication for advances in polymer technology to design and modify the “switchable membrane surfaces” with controllable charge distribution and surface wettability, as well as regulation of water flux and salt.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Abbas, Muhammad Asad& Mushtaq, Shehla& Cheema, Waqas& Qiblawey, Hazim& Zhu, Shenmin& Li, Yao…[et al.]. 2020. Surface Modification of TFC-PA RO Membrane by Grafting Hydrophilic pH Switchable Poly(Acrylic Acid) Brushes. Advances in Polymer Technology،Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1130392
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Abbas, Muhammad Asad…[et al.]. Surface Modification of TFC-PA RO Membrane by Grafting Hydrophilic pH Switchable Poly(Acrylic Acid) Brushes. Advances in Polymer Technology No. 2020 (2020), pp.1-12.
https://search.emarefa.net/detail/BIM-1130392
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Abbas, Muhammad Asad& Mushtaq, Shehla& Cheema, Waqas& Qiblawey, Hazim& Zhu, Shenmin& Li, Yao…[et al.]. Surface Modification of TFC-PA RO Membrane by Grafting Hydrophilic pH Switchable Poly(Acrylic Acid) Brushes. Advances in Polymer Technology. 2020. Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1130392
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1130392
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
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