Keywords
3D printing
chitosan
hydrogel
mechanical properties
rheology
Abstract
The 3D printing with curing via post extrusion heating for inks based on a chitosan/β-glycerophosphate/NaHCO3 (CS/GP/NaHCO3) mixture was demonstrated. The effect of molecular weight, deacetylation degree of chitosan, and solution concentration on the gelation process was investigated: the composition containing 2% of CS (molecular weight 900 kDa and deacetylation degree of 68%) and 0.1 m acetic acid mixed with GP in 0.4 m NaHCO3 demonstrated optimal rheological characteristics for direct ink writing. Mechanical properties of printed gels were in line with physically crosslinked 3D printed CS based ones reported in literature and higher than for 3D printed CS/GP systems.
Funders
Ministry of Education and Science of the Russian Federation
1023031700043-2-1.4.4
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