Sequential Infiltration Synthesis of Al2O3 in Polyethersulfone Membranes

We report the sequential infiltration synthesis (SIS) of aluminum oxide (Al 2 O 3 ) into polyethersulfone (PES) ultrafiltration (UF) membranes to form hybrid nanocomposites. SIS relies on chemical interactions between precursor vapors and polymer functional groups, and enables nucleation and growth...

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Bibliographic Details
Published in:JOM (1989) 2019, Vol.71 (1), p.212-223
Main Authors: Waldman, Ruben Z., Choudhury, Devika, Mandia, David J., Elam, Jeffrey W., Nealey, Paul F., Martinson, Alex B. F., Darling, Seth B.
Format: Article
Language:English
Subjects:
Aluminum
Aluminum oxide
Application of Atomic Layer Deposition for Functional Nanomaterials
Atomic layer epitaxy
Chemistry/Food Science
Earth Sciences
Electrons
Ellipsometry
Engineering
Environment
Fourier transforms
Functional groups
Infiltration
Inorganic materials
Mechanical properties
Membranes
Nanocomposites
Nucleation
Organic chemistry
Photoelectrons
Physics
Plasma etching
Polyethersulfones
Polymers
Prepolymers
Silicon wafers
Synthesis
Ultrafiltration
Viability
Zinc oxides
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Summary:We report the sequential infiltration synthesis (SIS) of aluminum oxide (Al 2 O 3 ) into polyethersulfone (PES) ultrafiltration (UF) membranes to form hybrid nanocomposites. SIS relies on chemical interactions between precursor vapors and polymer functional groups, and enables nucleation and growth of inorganic materials to controlled depth. Using in situ Fourier-transform infrared spectroscopy and ellipsometry measurements, we demonstrate that trimethylaluminum associates with the sulfonyl groups in PES, extending the library of SIS-modified polymer nanocomposites to a previously undescribed polymer system and new application space: PES UF membranes. Depth-profiled x-ray photoelectron spectroscopy showed that the trimethylaluminum purge time dictates the extent of Al 2 O 3 infiltration. Energy dispersive spectroscopy revealed the differences between SIS and atomic layer deposition in the membranes. This work demonstrates the viability of SIS to access the entire macroporous volume of PES UF membranes.
ISSN:1047-4838
1543-1851
DOI:10.1007/s11837-018-3142-3