| Autor: |
Hye Rin Yoon, Jong Hak Kim, Du Yeol Ryu, Seongjun Jo, Chang Y. Ryu, Sungmin Park, Taesuk Jun |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
ACS Applied Polymer Materials. 1:584-592 |
| ISSN: |
2637-6105 |
| DOI: |
10.1021/acsapm.9b00050 |
| Popis: |
A simple approach to fabricating nanoporous structures and their functionality is demonstrated using a triblock copolymer of polystyrene-b-poly(methyl methacrylate)-b-poly(tert-butyl acrylate) (PS-b-PMMA-b-PtBA), where a continuous-type morphology is set in PS matrix to form the cylinders consisting of the PMMA and minor PtBA blocks. For directional and uniform nanochannels at the interfaces, a perpendicular orientation of cylinders was exploited near two interfaces of air/polymer and polymer/neutral substrate, sandwiching the random orientation of cylinders in the interior of the film. Nondegradative, selective swelling–deswelling process of cylindrical (PMMA-b-PtBA) blocks generates nanopores as an effective route to precisely tune the pore size. Further, a simple hydrolysis of tBA units functionalizes the nanopore surfaces and walls into poly(acrylic acid) layers. We demonstrate the pH-responsive water permeability of nanoporous membranes and their active switching with respect to biomolecules such as ... |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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