A peptidomimetic-based thixotropic organogel showing syneresis-induced anti-adhesion against water and ice

Gumtya, Milan; Mondal, Sahabaj; Kumar, Santosh; Ibukun, Olamilekan Joseph; Haldar, Debasish

doi:10.1039/d1nj04647k

Cited by 2 publications

(3 citation statements)

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“…This is a typical characteristic of gels with a high degree of crosslinks. 51 , 54 Strong gels with G ′ > 3000 Pa could be obtained at the polymer content of 15∼23 wt%, including the limonene gel by PPeOx 10 - b -POx1 6 ( Figure S14 ).…”

Section: Resultsmentioning

confidence: 99%

“…In all cases, the G ′ values are several times up to about one order of magnitude higher than G ″ values over the whole frequency range (ω = 0.01–100 rad s –1 ). This is a typical characteristic of gels with a high degree of crosslinks. , Strong gels with G ′ > 3000 Pa could be obtained at the polymer content of 15∼23 wt%, including the limonene gel by PPeOx 10 - b -POx1 6 (Figure S14).…”

Section: Resultsmentioning

confidence: 99%

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Self-Assembling Oligo(2-oxazoline) Organogelators for the Encapsulation and Slow Release of Bioactive Volatiles

Zhao

Liu

et al. 2022

ACS Omega

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Herein, we report a class of distinctive supramolecular nanostructures in situ-generated from the cationic ring-opening polymerization of a particular 2-oxazoline monomer, i.e., 2-( N - tert -butyloxycarbonylaminomethyl)-2-oxazoline (Ox1). Driven by side-chain hydrogen bonding between neighboring molecules and van der Waals interactions, the growing oligomers of Ox1 precipitate in the form of macroscopic platelets when the degree of polymerization reaches 5–7. A similar self-assembly occurred in the block copolymerization of 2-ethyl-2-oxazoline (EtOx) or 2-pentyl-2-oxazoline (PeOx) and Ox1 as the second monomer. These polymeric aggregates were found to disassemble into rod-like nanoparticles under appropriate conditions, and to form stable organogels in some polar solvents like dimethylformamide as well as in natural liquid fragrances such as ( R )-carvone, citronellal, and ( R )-limonene. Scanning electron microscopy revealed that the morphology of their xerogels was solvent-dependent, mainly with a lamellar or fibrous structure. The rheology measurements confirmed the as-obtained organogels feature an obvious thixotropic character. The storage modulus was about 7–10 times higher than the loss modulus, indicating the physical crosslinking in the gel. The fragrance release profiles showed that the presented supramolecular gel system exhibits good sustained-release effect for the loaded bioactive volatiles.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Self-Assembling Oligo(2-oxazoline) Organogelators for the Encapsulation and Slow Release of Bioactive Volatiles

Zhao

Liu

et al. 2022

ACS Omega

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“…When the shrunken gel is cooled back, it swells again and the hydrogel reforms. Gumtya et al have shown that the gels of compound P ( Figure 54 a) in aromatic solvents, such as benzene, toluene, xylene, dichlorobenzene, are stable at room temperature, but exhibit syneresis when they are cooled at 15 °C [ 126 ].…”

Section: Syneresismentioning

confidence: 99%

Beyond Sol-Gel: Molecular Gels with Different Transitions

Yilmazer

Schwaller

Mésini

2023

Gels

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The existence of sol–gel transitions is one of the most manifest properties of molecular gels. These transitions reflect their nature since they correspond to the association or dissociation of low weight molecules through non-covalent interactions to form the network constitutive of the gel. Most described molecular gels undergo only one gel-to-sol transition upon heating, and the reverse sol-to-gel transition upon cooling. It has been long observed that different conditions of formation could lead to gels with different morphologies, and that gels can undergo a transition from gel to crystals. However, more recent publications report molecular gels which exhibit additional transitions, for instance gel-to-gel transitions. This review surveys the molecular gels for which, in addition to sol–gel transitions, transitions of different nature have been reported: gel-to-gel transitions, gel-to-crystal transition, liquid–liquid phase separations, eutectic transformations, and synereses.

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A peptidomimetic-based thixotropic organogel showing syneresis-induced anti-adhesion against water and ice

Abstract: The self-assembly, organogelation, syneresis, and anti-adhesion properties of a Peptidomimeticcontaining L-phenylalanine and 2,6-dimethylpyridine 3,5-dicarboxylic acid have been studied in detail. The peptidomimetic forms a transparent gel in aromatic solvents such...

Cited by 2 publications

References 42 publications

Self-Assembling Oligo(2-oxazoline) Organogelators for the Encapsulation and Slow Release of Bioactive Volatiles

Self-Assembling Oligo(2-oxazoline) Organogelators for the Encapsulation and Slow Release of Bioactive Volatiles

Beyond Sol-Gel: Molecular Gels with Different Transitions

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