Solution Small-Angle X-ray Scattering as a Screening and Predictive Tool in the Fabrication of Asymmetric Block Copolymer Membranes

被引：97

作者：

Dorin, Rachel Mika ^{[3
]}

Marques, Debora Salomon ^{[1
]}

Sai, Hiroaki ^{[3
]}

Vainio, Ulla ^{[4
]}

Phillip, William A. ^{[5
]}

Peinemann, Klaus-Viktor ^{[2
]}

Nunes, Suzana P. ^{[1
]}

Wiesner, Ulrich ^{[3
]}

机构：

[1] King Abdullah Univ Sci & Technol, Water Desalinat & Reuse Ctr, Thuwal 239556900, Saudi Arabia

[2] King Abdullah Univ Sci & Technol, Adv Membrane & Porous Mat Ctr, Thuwal 239556900, Saudi Arabia

[3] Cornell Univ, Dept Mat Sci & Engn, Ithaca, NY 14853 USA

[4] DESY, HASYLAB, D-22607 Hamburg, Germany

[5] Univ Notre Dame, Dept Chem & Biomol Engn, Notre Dame, IN 46556 USA

来源：

ACS MACRO LETTERS | 2012年 / 1卷 / 05期

基金：

美国国家科学基金会;

关键词：

FILTRATION MEMBRANES; NANOPOROUS MEMBRANES; PHASE-BEHAVIOR; NANOCHANNELS; SELECTIVITY; DIFFUSION; SOLVENTS; FILMS;

D O I：

10.1021/mz300100b

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Small-angle X-ray scattering (SAXS) analysis of the diblock copolymer poly(styrene-b-(4-vinyl)pyridine) in a ternary solvent system of 1,4-dioxane, tetrahydrofuran, and N,N-dimethylformamide, and the triblock terpolymer poly(isoprene-b-styrene-b-(4-vinyl)pyridine) in a binary solvent system of 1,4-dioxane and tetrahydrofiiran, reveals a concentration-dependent onset of ordered structure formation. Asymmetric membranes fabricated from casting solutions with polymer concentrations at or slightly below this ordering concentration possess selective layers with the desired nanostructure. In addition to rapidly screening possible polymer solution concentrations, solution SAXS analysis also predicts hexagonal and square pore lattices of the final membrane surface structure. These results suggest solution SAXS as a powerful tool for screening casting solution concentrations and predicting surface structure in the fabrication of asymmetric ultrafiltration membranes from self-assembled block copolymers.

引用

页码：614 / 617

页数：4

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