Supramolecular Organogel Based on Crown Ether and Secondary Ammoniumion Functionalized Glycidyl Triazole Polymers

Abstract

A supramolecular organogel was prepared by mixing the glycidyl triazole polymers (GTP) functionalized with crown ether and secondary ammoniumion at the side groups. The polymers form an organogel above a concentration of 3 wt % via physical cross-links of the inclusion complex. The organogel responds to multiple stimuli, e.g., temperature, acid/base, and chemical species. The number of the effective cross-links estimated from the storage modulus and the affine network model suggests that some part of the binding sites could not work as the physical cross-links. Rheological measurement under large deformation showed that the storage modulus was constant up to 250% strain and larger than the loss modulus up to 600% strain. The high elasticity of the gel is attributable to the material design based on the high-molecular-weight flexible glycidyl polymers with many binding sites in the single polymer chain. The organogel also showed nice self-healing behavior. The molecular diffusion in the gel network was characterized by fluorescence correlation spectroscopy. Although the cross-link of the organogel has dynamic nature due to inclusion complexation, the diffusion behavior of the low-molecular-weight fluorescence tracer was similar to that observed in chemically cross-linked gels.

Tunable mechano-responsive organogels by ring-opening copolymerizations of N-carboxyanhydrides

“…With the construction of organogels from mPEG- b -P(BLG- co -Gly) diblock copolymers being driven by β-sheet formation in the polypeptide segments, a self-healing property of the gel system was expected and demonstrated by a macroscopic self-healing experiment conducted on polymer 11 in DMF at a concentration of 20 wt %._ENREF_51 29 Half of the organogel was blended with 0.01 mL of Alizarin Red S DMF solution for visibility (Fig. 8a).…”

Self-healing polymer materials constructed by macrocycle-based host–guest interactions

“…47 Here, "glycidyl 4-functionalized-1,2,3-triazole polymer" (functionalized GTP)-based organogel functionalized with DB24C8 (host) or DBAS (guest) moieties was rst prepared (Fig. 47 Here, "glycidyl 4-functionalized-1,2,3-triazole polymer" (functionalized GTP)-based organogel functionalized with DB24C8 (host) or DBAS (guest) moieties was rst prepared (Fig.…”

Intrinsic Self-Healing Polymers Based on Supramolecular Interactions: State of the Art and Future Directions

“…Moreover, a mechanical strength of 14.8 kPa and fast self-healing properties distinguished the material. A self-healing supramolecular organogel based on the crosslinks of DB24C8 and DBA, which were separately incorporated in a glycidyl triazole polymer backbone, was described by Ikeda and coworkers [250]. The advantage of this gel is the high elasticity under large deformation as a result of the mobile polymer chains with higher molar masses.…”