Abstract
Combining the unique corona structure of worm‐like patchy micelles immobilized on a polymer fiber with the molecular self‐assembly of 1,3,5‐benzenetricarboxamides (BTAs) leads to hierarchical superstructures with a fir‐tree‐like morphology. For this purpose, worm‐like patchy micelles bearing pendant, functional tertiary amino groups in one of the corona patches were prepared by crystallization‐driven self‐assembly and immobilized on a supporting polystyrene fiber by coaxial electrospinning. The obtained patchy fibers were then immersed in an aqueous solution of a tertiary amino‐functionalized BTA to induce patch‐mediated molecular self‐assembly to well‐defined fir‐tree‐like superstructures upon solvent evaporation. Interestingly, defined superstructures are obtained only if the pendant functional groups in the surface patches match with the peripheral substituents of the BTA, which is attributed to a local increase in BTA concentration at the polymer fibers’ surface.
Highlights
Combining the unique corona structure of wormlike patchy micelles immobilized on a polymer fiber with the molecular self-assembly of 1,3,5-benzenetricarboxamides (BTAs) leads to hierarchical superstructures with a fir-treelike morphology
These results indicate that the patchy surface of the fibers is able to initiate the molecular self-assembly of BTA-Methyl
To get a closer insight into the superstructure formation via molecular self-assembly of BTA-Methyl mediated by the functional PDMA patches at the surface of PScore/SEDMA fibers, electrospun polymer fibers with immobilized, nonfunctional patchy micelles (PScore/SEM) and neat PS fibers were prepared and used as reference (Figure 2)
Summary
Combining the unique corona structure of wormlike patchy micelles immobilized on a polymer fiber with the molecular self-assembly of 1,3,5-benzenetricarboxamides (BTAs) leads to hierarchical superstructures with a fir-treelike morphology. As building block for the molecular self-assembly (Scheme 1 B) BTA-Methyl was selected featuring peripheral tertiary N,N-dimethylaminoethyl substituents[11] which match the pendant functional groups in the PDMA patches of the SEDMA micelles.
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