AI Article Synopsis
- This study presents a new method for controlling the self-assembly of micelle-forming amphiphilic block copolymers, specifically PEO-PTMSPMA, using a reactive additive, TEOS.
- The addition of TEOS enhances the hydrophobicity of the polymer, allowing for a gradual transition in structure from micelles to vesicles and larger compound vesicles.
- High concentrations of TEOS also enable the conversion of these polymer assemblies into various silica nanomaterials, which traditional methods cannot easily produce.
Article Abstract
Control of polymer assemblies in solution is of great importance to determine the properties and applications of these polymer nanostructures. We report a novel co-self-assembly strategy to control the self-assembly outcomes of a micelle-forming amphiphilic block copolymer (BCP) of poly(ethylene oxide) (PEO) and poly[3-(trimethoxysilyl)propyl methacrylate] (PTMSPMA), PEO--PTMSPMA. With a reactive and hydrophobic additive tetraethyl orthosilicate (TEOS), the assembly nanostructures of PEO--PTMSPMA are tunable. The swelling of the PTMSPMA block by hydrophobic TEOS increases the hydrophobic-to-hydrophilic ratio that enables a continuous morphological evolution from spherical micelles to vesicles and eventually to large compound vesicles. TEOS that co-hydrolyzes with the PTMSPMA block can further stabilize and fix these hybrid nanostructures. With high TEOS concentrations, these polymer assemblies can be further converted through thermal annealing into unique silica nanomaterials, including nanospheres, hollow nanoparticles with dual shells, and mesoporous silica frameworks that cannot be synthesized through conventional syntheses otherwise.
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| http://dx.doi.org/10.1021/acs.langmuir.1c01554 | DOI Listing |
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