Solvent-free synthesis and characterization of allyl chitosan derivatives

Abstract

The allyl chitosan derivatives are synthesized, characterized and evaluated as photosensitive components for creation of biomedical materials with well-defined architectonics.

Stereolithography apparatus and digital light processing-based 3D bioprinting for tissue fabrication

“…91 With the introduction of the allyl group, the modified chitosan was crosslinked under the UV light in less than a minute. 92 These photocurable materials demonstrated the potential capability of applications on SLA/DLP-based 3D bioprinting, enabling them to fabricate complex constructs with higher resolution effectively.…”

Biopolymeric additive manufacturing: The bidirectional interplay of synthetic and natural systems

“…Many variations of stereolithography exist today, with differences in sample stage orientation and light source. Stereolithography has been employed with cellulose nanofibril inclusions, [63] gelatin bioinks, [64] chitosan derivatives, [65] and PHA-based oligomers [66].…”

Quantitative analysis of degree of substitution/molar substitution of etherified polysaccharide derivatives

“…According to different etherification substrates, several methods used to determine DS/MS have been proposed. For alkylation of chitosan, the DS per glucosamine unit was often determined by titration [ 105 , 106 ], C/N ratio of elemental analysis and NMR analysis [ 103 ].…”

“…With the first approach, the extent of reaction and DS determination are derived by analyzing the change of bromide ions, that is to say, the generation rate of bromide ions is the conversion rate of etherification, and the DS of ethers can be calculated by the equation 7 further [ 106 ], where M is molar mass of the alkyl group; c is the concentration of silver nitrate standard solution (mol/L); V is the volume of consuming silver nitrate standard solution (mL); m is the weight of ethers.…”