Fabrication of novel bioactive hydroxyapatite-chitosan-silica hybrid scaffolds: Combined the sol-gel method with 3D plotting technique

Biocompatible Glycine‐Assisted Catalysis of the Sol‐Gel Process: Development of Cell‐Embedded Hydrogels

“…We have also demonstrated that short peptide sequences inspired from collagen could also be used to obtain hydrogels in which cells can be embedded . However, only few examples of sol‐gel process hydrogels applied to 3D‐printing have been published, most of the time incompatible with cell encapsulation due to reaction conditions (acidic conditions or use of toxic catalysts) …”

“…[16] However, only few examples of sol-gel process hydrogels applied to 3D-printing have been published, most of the time incompatible with cell encapsulation due to reaction conditions (acidic conditions or use of toxic catalysts). [10,17,18] The main complexity of using bioink based on chemical hydrogel is to control its viscosity, as it increases simultaneously with the reticulation. For this reason, a suitable 'printing window' has to be determined, i. e. a period when the viscosity is sufficient to print with retention of the shape and without flowing, For extrusion printing, this window should be comprised between 30 and 6.10 7 mPa.s, depending of the nozzle's size, shape and the type of extruder (e. g. endless screw, air compressor).…”

Preparation and Enrichment Properties of Magnetic Dodecyl Chitosan/Silica Composite for Emerging Bisphenol Contaminants

“…The stretching vibrations of N–H bonds at 3427 cm −1 and amide band I at 1656 cm −1 from chitosan were both appeared in the spectrums of Fe 3 O 4 @CTS/SiO 2 composite ( Figure 1 c) and Fe 3 O 4 @CTS/SiO 2 -C 12 composite ( Figure 1 d). The presence of bands centered at 793 and 1094 cm −1 were most probably due to Si–O vibration, which confirmed the presence of a siliceous network in the composite [ 23 ]. Moreover, the intensity of the peaks at 2925 and 2864 cm −1 that belonged to the stretching vibrations of C–H bond were obviously increased in the spectrum of Fe 3 O 4 @CTS/SiO 2 -C 12 composite.…”

“…Compared with the self-cross-linking, more researchers focused on compositing chitosan with other distinctive materials like bentonite [ 19 ], active charcoal [ 20 ], and polymer [ 21 ]. Among various chitosan composites, the compositing of chitosan with silica can improve more efficiently the phy-chemical properties of chitosan-based composites including the mechanical stability, porous structure, specific surface area, as well as high biocompatibility [ 22 , 23 ]. Various silicon alkoxide with active groups can be chosen as the precursors of silica components to modify the characteristic of chitosan/silica composites [ 24 ].…”

Synergistic Fabrication of Dose–Response Chitosan/Dextran/β-Glycerophosphate Injectable Hydrogel as Cell Delivery Carrier for Cardiac Healing After Acute Myocardial Infarction

“…These outcomes suggested that the C-(1.0 D)@b-GP hydrogels demonstrated a stable and high degradation ratio for 4 weeks, and this may will deliver the promising possessions for its application in vivo. [50][51][52] The biocompatibility and suitability of the fabricated hydrogel matrixes were examined via in vitro methods. The in vitro cell viability and cell proliferations were investigated by using human coronary artery endothelial cells (HCAECs) cultured on the prepared hMSCs-CD@b-GP and the values were quantitatively measured as exhibited in Figure 3.…”