Publications by authors named "Mayra A Lara-Pena"
Correction for 'Concentration and temperature dependent interactions and state diagram of dispersions of copolymer microgels' by José Ruiz-Franco , , 2023, , 3614-3628, https://doi.org/10.1039/D3SM00120B.
View Article and Find Full Text PDFWe investigate by means of small angle neutron scattering experiments and numerical simulations the interactions and inter-particle arrangements of concentrated dispersions of copolymer poly(-isopropylacrylamide)-poly(ethylene glycol methyl ether methacrylate) (PNIPAM-PEGMA) microgels across the volume phase transition (VPT). The scattering data of moderately concentrated dispersions are accurately modeled at all temperatures by using a star polymer form factor and static structure factors calculated from the effective potential obtained from simulations. Interestingly, for temperatures below the VPT temperature (VPTT), the radius of gyration and blob size of the particles significantly decrease with increasing the effective packing fraction in the non-overlapping regime.
View Article and Find Full Text PDFArticle Synopsis
- * At low temperatures, the microgels have a loose structure resembling a starlike shape, but as the temperature increases, PEG chains become part of the PNIPAM network, resulting in a unique density profile with two dense regions inside.
- * The location of the PEG chains significantly affects how the microgels interact with each other, revealing that modifying their structure can influence their collective behaviors in new ways.