Changeable wettability of electrospun membrane by adjusting self‐assembly micelles structure of amphiphilic block copolymer. Issue 4 (6th September 2021)

• Record Type: Journal Article
• Authors: Wang, Lingxiao; Liang, Xinyue; Xu, Guilong; Hu, Jian
• Is Part Of: Nano select. Volume 3:Issue 4(2022)
• Page Start: 874
• Page End: 881
• Publication Date: 2021-09-06
• Subjects: amphiphilic -- ATRP -- electrospinning -- self‐assembly; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.5
• DOI: 10.1002/nano.202100200
• Languages: English
• ISSNs: 2688-4011

Abstract

Abstract: Fiber membranes with high specific surface area can be produced when using electrospinning technology combined with amphiphilic block polymers. Due to the solubility difference between the two segments of amphiphilic block polymers, it is easy to be self‐assembly in solvents, which affects the morphology of the spinning fiber and the surface properties of the membrane. In this work, the relationship between the self‐assembly of the amphiphilic block polymer and the morphology of the spinning fiber and the wetting performance of the spinning membrane was explored. Membrane is produced by electrospinning amphiphilic block copolymer PS‐b‐PHEMA (polystyrene‐block‐poly(2‐hydroxyethyl methacrylate) by using co‐solvent system. PS‐b‐PHEMA with controlled molecular weight (Mw) and polymer dispersity index (PDI) was synthesized via atom transfer radical polymerization (ATRP) and characterized by nuclear magnetic resonance (NMR) and gel permeation chromatography (GPC). The electrospun membrane have both super‐hydrophobic and super‐hydrophilic by adjusting the ratio of mixed solvents, demonstrating that the wetting performance of the fiber membrane mainly depends on the shell structure of the self‐assembly micelles. Abstract : In this paper, the self‐assembly is realized according to the different solubility of the block polymer in the solvent, and different micellar core‐shell structures are obtained by adjusting the mixed solvent ratio. The electrospinning technology is combined with block polymers to prepare a series of nanofiber mats with adjustable fiber morphology and wetting properties.