Micellar Self-Assembly of Block Copolymers for Fabrication of Nanostructured Membranes

  • Debora S. Marques

Student thesis: Doctoral Thesis

Abstract

This research work examines the process of block copolymer membrane fabrication by self-assembly combined by non-solvent induced phase separation. Self-assembly takes place from the preparation of the primordial solution until the moment of immersion in a non-solvent bath. These mechanisms are driven thermodynamically but are limited by kinetic factors. It is shown in this work how the ordering of the assembly of micelles is improved by the solution parameters such as solvent quality and concentration of block copolymer. Order transitions are detected, yielding changes in the morphology. The evaporation of the solvents after casting is demonstrated to be essential to reach optimum membrane structure. The non-solvent bath stops the phase separation at an optimum evaporation time.
Date of AwardNov 2013
Original languageEnglish
Awarding Institution
  • Physical Science and Engineering
SupervisorSuzana Nunes (Supervisor)

Keywords

  • Block Copolymer
  • Self-assembly
  • Membrane

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