Self-Assembly in Poly(dimethylsiloxane)–Poly(ethylene oxide) Block Copolymer Template Directed Synthesis of Linde Type A Zeolite

作者: Lucio Bonaccorsi , Pietro Calandra , Mikhail A. Kiselev , Heinz Amenitsch , Edoardo Proverbio

DOI: 10.1021/LA400951S

关键词: Ethylene oxideAmphiphilePolymer chemistryHydrothermal synthesisSmall-angle X-ray scatteringCopolymerZeoliteSelf-assemblyMaterials scienceOxide

摘要: We describe the hydrothermal synthesis of zeolite Linde type A (LTA) submicrometer particles using a water-soluble amphiphilic block copolymer poly(dimethylsiloxane)-b-poly(ethylene oxide) as template. The formation and growth intermediate aggregates in presence diblock have been monitored by small-angle X-ray scattering (SAXS) above critical micellar concentration at constant temperature 45 °C. early stage process was characterized incorporation LTA components into surface with primary units 4.8 nm core–shell morphology. During this period, restricted to an initial time 1–3 h, structure does not show significant changes, while subsequent aggregation among these takes place. shape transition SAXS profile late has connected ...

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