Salicyl-imine-chitosan hydrogels: Supramolecular architecturing as a crosslinking method toward multifunctional hydrogels

Mechanical enhancement of amine‐functionalized TiO2 reinforced polyimine composites

“…The absorption at ∼1640 cm −1 indicates the presence of imine bonding (CN) in polyimine, polyimine‐TiO 2 ‐3 and polyimine‐amTiO 2 ‐3. The broad band around 3440 cm −1 indicates the presence of hydrogen bonding in polyimine, polyimine‐TiO 2 ‐3, and polyimine‐amTiO 2 ‐3 …”

Cinnamyl-Imine-Chitosan Hydrogels. Morphology Control

“…Three series of hydrogels based on chitosan and cinnamaldehyde were synthetized by imination reaction followed by the self-ordering of the newly formed imine units into clusters playing the role of chitosan crosslinkers. [8][9][10][11][12][13][14][15] Scheme 1 represents the obtaining of the studied hydrogels,…”

“…It is well documented in literature that the crosslinking degree strongly influences the morphology of the hydrogels. [1][2][3][4][5][6][7][8][9][10][11][12][13][14]18 To see how this parameter influenced the morphology in the particular case of cinnamyl-imine-chitosan hydrogels, SEM images of the corresponding xerogels were acquired at high magnification. Representative images were given for the series L1-L4 ( Figure 2).…”

“…7 To surpass this problem, our group developed a new strategy to crosslink chitosan with monoaldehydes, based on the principles of dynamic covalent chemistry. [8][9][10][11][12][13][14][15] It was demonstrated that using this strategy, biocompatible hydrogels could be successfully obtained, because the method allows using a large variety of monoaldehyde crossslinkers. 9,10,15 One important feature of the hydrogels is their ability to absorb large amounts of water or biologic fluids, which prompt them to mimic the tissues, or to encapsulate large amounts of drug to create drug delivery systems.…”

Operational Procedures in the Theory of the Drug Release from Chitosan Hydrogels

“…The Euler equations corresponding to the functional (8) are: (10) The last two equations represent a harmonic application from the fractal space to the fractal hyperbolic plane. As a consequence of those equations we have, as one can easily verify, the equation: (11) This means that the scalar quantity under the differential gradient operator is constant, real and always positive, being a sum of two squares of some real quantities. Let us note that this quantity with m 2 , where m is real.…”