Self-assembled Block Copolymer Membranes with Bioinspired Artificial Channels

الموضوعات

علوم بحتة وطبيعية

الملخص

Nature is an excellent design that inspires scientists to develop smart systems. In therealm of separation technology, biological membranes have been an ideal model forsynthetic membranes due to their ultrahigh permeability, sharp selectivity, and stimuliresponse.In this research, fabrications of bioinspired membranes from block copolymerswere studied. Membranes with isoporous morphology were mainly prepared using selfassemblyand non-solvent induced phase separation (SNIPS).An effective method that can dramatically shorten the path for designing new isoporousmembranes from block copolymers via SNIPS was first proposed by predetermining atrend line computed from the solvent properties, interactions and copolymer block sizesof previously-obtained successful systems. Application of the method to new copolymersystems and fundamental studies on the block copolymer self-assembly were performed.Furthermore, the manufacture of bioinspired membranes was explored using (1)poly(styrene-b-4-hydroxystyrene-b-styrene) (PS-b-PHS-b-PS), (2) poly(styrene-bbutadiene-b-styrene) (PS-b-PB-b-PS) and (3) poly(styrene-b-γ-benzyl-L-glutamate) (PSb-PBLG) copolymers via SNIPS. The structure formation was investigated using smallangleX-ray scattering (SAXS) and time-resolved grazing-Incidence SAXS. The PS-b-PHS-b-PS membranes showed preferential transport for proteins, presumably due to thehydrogen bond interactions within the channels, electrostatic attraction, and suitable poredimension. Well-defined nanochannels with pore sizes of around 4 nm based on PS-b-PB-b-PS copolymers could serve as an excellent platform to fabricate bioinspiredchannels due to the modifiable butadiene blocks. Photolytic addition of thioglycolic acidwas demonstrated without sacrificing the self-assembled morphology, which led to afive-fold increase in water permeance compared to that of the unmodified. Membraneswith a unique feather-like structure and a lamellar morphology for dialysis andnanofiltration applications were obtained from PS-b-PBLG copolymers, which exhibiteda hierarchical self-assembled morphology with confined α-helical polypeptide domains.Our results suggest that bioinspired nanochannels can be designed via block copolymerself-assembly using classical methods of membrane preparation. Investigation of themembrane formation mechanism leads us to a better understanding of the designstrategies for the development of self-assembled nanochannels from block copolymers. Infurther outlook, our research could give a contribution to the discovery of futuregeneration materials for water purification and desalination, as well as biologicalseparation.

روابط وملفات

التعريف والنوع

رقم الوثيقة

ffdf3bdb-2df9-48b2-b917-8b4f70021373

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل دكتوراة

نوع الملف

pdf text

أسماء الملفات

1699184_1.pdf

بيانات النشر

ألقاب المؤلفين

[{"name_ar":" Burhannudin Sutisna","title_ar":"اعداد","title_en":"Preparation"},{"name_ar":" Suzana Pereira","title_ar":"اشراف","title_en":"Supervision"}]

اللغة

English

المصدر والدورية

اسم المصدر

Self-assembled Block Copolymer Membranes with Bioinspired Artificial Channels

المحتوى والصفحات

عدد الصفحات

0

كلمات الباحثين

Block copolymer Membrane Bioinspired channels Self-assembly Water Purification Protein seperation

إشراف وإعداد

الإشراف

Suzana Pereira

الإعداد

Burhannudin Sutisna

الاقتباسات الببليوغرافية