TY - JOUR
T1 - Gelation Kinetics-Structure Analysis of pH-triggered Low Molecular Weight Hydrogelators
AU - Lakshminarayanan, Vasudevan
AU - Chockalingam, Cindhuja
AU - Mendes, Eduardo
AU - van Esch, Jan H.
PY - 2021
Y1 - 2021
N2 - Properties such as shear modulus, gelation time, structure of supramolecular hydrogels are strongly dependent on self-assembly, gelation triggering mechanism and processes used to form the gel. In our work we extend reported rheology analysis methodologies to pH-triggered supramolecular gels to understand structural insight using a model system based on N−N’ Dibenzoyl-L-Cystine pH-triggered hydrogelator and Glucono-δ-Lactone as the trigger. We observed that Avrami growth model when applied to time-sweep rheological data of gels formed at lower trigger concentrations provide estimates of fractal dimension which agree well compared with visualization of the microstructure as seen via Confocal Laser Scanning Microscopy, for a range of gelator concentrations.
AB - Properties such as shear modulus, gelation time, structure of supramolecular hydrogels are strongly dependent on self-assembly, gelation triggering mechanism and processes used to form the gel. In our work we extend reported rheology analysis methodologies to pH-triggered supramolecular gels to understand structural insight using a model system based on N−N’ Dibenzoyl-L-Cystine pH-triggered hydrogelator and Glucono-δ-Lactone as the trigger. We observed that Avrami growth model when applied to time-sweep rheological data of gels formed at lower trigger concentrations provide estimates of fractal dimension which agree well compared with visualization of the microstructure as seen via Confocal Laser Scanning Microscopy, for a range of gelator concentrations.
KW - confocal microscopy
KW - fractal dimension
KW - hydrogelator
KW - kinetics
KW - rheology
UR - http://www.scopus.com/inward/record.url?scp=85116469923&partnerID=8YFLogxK
U2 - 10.1002/cphc.202100276
DO - 10.1002/cphc.202100276
M3 - Article
AN - SCOPUS:85116469923
VL - 22
SP - 2256
EP - 2261
JO - ChemPhysChem: a European journal of chemical physics and physical chemistry
JF - ChemPhysChem: a European journal of chemical physics and physical chemistry
SN - 1439-4235
IS - 21
ER -