2022
DOI: 10.1021/acs.macromol.2c00874
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Investigating the Kinetics and Structure of Network Formation in Ultraviolet-Photopolymerizable Starch Nanogel Network Hydrogels via Very Small-Angle Neutron Scattering and Small-Amplitude Oscillatory Shear Rheology

Abstract: While photopolymerization has been broadly used to fabricate hydrogels, the kinetics of the structural evolution of such hydrogels during photopolymerization and how the kinetics relate to ultimate hydrogel properties are not well-understood. Herein, small-amplitude oscillatory shear rheology (bulk scale) and time-resolved very small-angle neutron scattering (vSANS, microscale) are used in tandem to investigate the kinetics of the photopolymerization of methacrylated starch building blocks with different conce… Show more

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Cited by 4 publications
(4 citation statements)
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“…The slower cross-linking of CSNB-GelSH in comparison with DexNB-GelSH might be caused by the negatively charged nature of chondroitin sulfate in combination with negatively charged gelatin above its iso-electric point (IEP) of 4.8–5.0, which leads to a slower approaching of the polymer chains due to repulsive forces. , The latter phenomenon was described by Majcher et al They executed research on the cross-linking kinetics of starch in uncharged, cationic, and anionic forms. Both the charged derivatives significantly increased the photoinduced gelation time . However, all thiol-NB hydrogels exhibited faster cross-linking kinetics compared to GelMA.…”
Section: Resultsmentioning
confidence: 92%
See 2 more Smart Citations
“…The slower cross-linking of CSNB-GelSH in comparison with DexNB-GelSH might be caused by the negatively charged nature of chondroitin sulfate in combination with negatively charged gelatin above its iso-electric point (IEP) of 4.8–5.0, which leads to a slower approaching of the polymer chains due to repulsive forces. , The latter phenomenon was described by Majcher et al They executed research on the cross-linking kinetics of starch in uncharged, cationic, and anionic forms. Both the charged derivatives significantly increased the photoinduced gelation time . However, all thiol-NB hydrogels exhibited faster cross-linking kinetics compared to GelMA.…”
Section: Resultsmentioning
confidence: 92%
“…Both the charged derivatives significantly increased the photoinduced gelation time. 34 However, all thiol-NB hydrogels exhibited faster cross-linking kinetics compared to GelMA. The latter was described before by Van Damme et al 35 comparing the kinetics of GelMA with GelNB-GelSH hydrogels.…”
Section: Hydrogel Development and Characterizationmentioning
confidence: 96%
See 1 more Smart Citation
“…Time-resolved small angle scattering is often applied for the analysis of structural changes and rheological properties of hydrogel systems. A recent study focused on the effect of photopolymerization synthesis method on the kinetics of the network morphology of Starch hydrogels [ 51 ]. Evolution of the network formation was captured through repeated alternating steps of very small-angle neutron scattering (vSANS) measurements and exposure of samples to UV light.…”
Section: Application Of Small Angle Neutron Scattering On Nanostructu...mentioning
confidence: 99%