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Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
Published on: February 7, 2017
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Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
Oleg V Kulikov1, Dumindika A Siriwardane2, Gregory T McCandless2
1Department of Chemistry and Biochemistry, University of Texas at Dallas; oleg.kulikov.chem@gmail.com.
Journal of Visualized Experiments : Jove
|March 14, 2017
Summary
Researchers developed a simple method to create diverse polycarbodiimide structures, like rings and spheres, driven by polymer chain interactions. These self-assembled polymer architectures show promise for drug delivery and novel materials.
Area of Science:
- Polymer Chemistry
- Materials Science
- Nanotechnology
Background:
- Polycarbodiimides (PCDs) are versatile polymers with potential applications in various fields.
- Controlling the self-assembly of polymers into specific secondary structures is crucial for advanced material design.
- Hydrophobic interactions play a significant role in dictating polymer aggregation and morphology.
Purpose of the Study:
- To develop a facile method for preparing diverse polycarbodiimide-based secondary structures.
- To investigate the influence of solvent polarity and concentration on polymer aggregation.
- To explore the potential applications of these self-assembled architectures.
Main Methods:
- Synthesis of polycarbodiimide-g-polystyrene copolymers (PS-PCDs) using coordination-insertion polymerization, copper(I)-catalyzed azide alkyne cycloaddition (CuAAC) click chemistry, and atom transfer radical polymerization (ATRP).
- Morphological characterization using atomic force microscopy (AFM) and scanning electron microscopy (SEM).
- Investigation of polymer aggregation in different solvents (CHCl3, THF, THF/EtOH) at varying concentrations.
Main Results:
- A facile method was established for preparing various polycarbodiimide secondary structures, including nano-rings, craters, fibers, and spherical particles.
- Morphological outcomes were significantly influenced by hydrophobic side-chain interactions within the polycarbodiimide strands.
- PS-PCDs formed toroidal architectures in CHCl3 at low concentrations and discrete spherical particles in more polar solvents (THF, THF/EtOH) in a concentration-dependent manner.
Conclusions:
- The study successfully demonstrated a method for directed self-assembly of polycarbodiimide-based architectures.
- The findings highlight the critical role of solvent environment and polymer concentration in controlling self-assembly.
- The prepared polycarbodiimide structures hold potential for applications as drug carriers and in the development of novel functional materials.
