Facile, shear-induced, rapid formation of stable gels of chitosan through in situ generation of colloidal metal salts

Abstract

A novel method of preparing chitosan gels using in situ generated negatively-charged colloidal salts of a variety of metal ions is described.

Straightforward intra/intermolecular cyclization to AIE-active cyclic TPE: selectively distinguishing benzaldehyde and a temperature sensor

“…Stimulus-responsive fluorescent materials tightly associated with intelligent materials have attracted extensive attention owing to their response to external stimulation, and these responsive fluorescent materials were widely applied in a variety of fields such as biomedical imaging, stimulus-responsive sensors, optoelectronic devices, and organic solid state lasers. [1][2][3][4][5][6][7][8][9][10] The mechanisms of the change in stimulus-responsive fluorescent materials are through alteration of the molecular packing 11 mode or chemical reactions. [12][13][14][15] Recently, the modification of the molecular packing mode has been a main strategy for the design of intelligent luminescent materials since the solid-state chemical reaction frequently involves relatively low conversion efficiency.…”

Mechanistic Analysis and Control of Electro‐Fabrication with Soft Matter: Polysaccharide Self‐Assembly with Electrochemically Produced Metal Ions

“…This is defined as supramolecular complexation or chelation, and it provides a versatile means for noncovalent crosslinking, endowed with functionalities that are derived from the presence of organometallic crosslinking sites. This has been of interest to the field of soft chemistry, as the physicochemical properties of chelated hydrogels can be tailored to suit applications in self healing, [2,[5][6][7][8][9] antibiotic, [6,[10][11][12] wound healing, [12][13][14][15] drug delivery, [16,17] mechanical actuation, [6,[18][19][20][21][22][23] stimuli responsive materials by redox [24] or homogeneous reactions, [7,[25][26][27][28] catalysis, [29][30][31] sensing, [32,33] bioinspired materials with fluorescent, [34] adhesive properties, [4] among others. Seeking to harness the capabilities of these materials, several publications have evaluated the interaction of metal ions and biomacromolecules, most notably, histidine-containing proteins, [3,7,35] alginate, [29,36] chitosan, [13,25,…”