Fractionation of cellulose nanocrystals: enhancing liquid crystal ordering without promoting gelation

C Honorato-Rios, C Lehr, C Schütz, R Sanctuary… - NPG asia …, 2018 - nature.com
Colloids of electrically charged nanorods can spontaneously develop a fluid yet ordered
liquid crystal phase, but this ordering competes with a tendency to form a gel of percolating …

Viscoelasticity Enhancement and Shear Thickening of Perfluorinated Sulfonic Acid Ionomer Dispersions in Water–Alcohol Solvent Mixtures

S Khandavalli, JH Park, HH Winter, DJ Myers… - …, 2023 - ACS Publications
We investigate the effect of dispersion media composition, water-to-isopropanol (IPA) ratio,
on the structure and rheology of perfluorinated sulfonic acid (PFSA) ionomers using short …

The conformational phase diagram of charged polymers in the presence of attractive bridging crowders

K Tripathi, H Garg, R Rajesh… - The Journal of Chemical …, 2023 - pubs.aip.org
Using extensive molecular dynamics simulations, we obtain the conformational phase
diagram of a charged polymer in the presence of oppositely charged counterions and …

Mechanism of chain collapse of strongly charged polyelectrolytes

AM Tom, S Vemparala, R Rajesh, NV Brilliantov - Physical review letters, 2016 - APS
We perform extensive molecular dynamics simulations of a charged polymer in a good
solvent in the regime where the chain is collapsed. We analyze the dependence of the …

Interfacial microstructure of neutral and charged polymer brushes: A density functional theory study

L Qing, J Jiang - The Journal of Chemical Physics, 2022 - pubs.aip.org
Polymer density functional theory (PDFT) is a computationally efficient and robust statistical
mechanics theory for capturing the interfacial microstructure of grafted polymer brushes …

Aggregation dynamics of rigid polyelectrolytes

AM Tom, R Rajesh, S Vemparala - The Journal of Chemical Physics, 2016 - pubs.aip.org
Similarly charged polyelectrolytes are known to attract each other and aggregate into
bundles when the charge density of the polymers exceeds a critical value that depends on …

Aggregation of flexible polyelectrolytes: Phase diagram and dynamics

AM Tom, R Rajesh, S Vemparala - The Journal of chemical physics, 2017 - pubs.aip.org
Similarly charged polymers in solution, known as polyelectrolytes, are known to form
aggregated structures in the presence of oppositely charged counterions. Understanding the …

Unexpected like-charge self-assembly of a biguanide-based antimicrobial polyelectrolyte

AM Zaki, A Troisi, P Carbone - The Journal of Physical Chemistry …, 2016 - ACS Publications
Polyelectrolyte chains dissolved in good solvent are expected to collapse in compact
configurations in the presence of multivalent ions. Here, we show that a weakly charged …

Effect of isopropanol cosolvent on the rheology and spinnability of aqueous polyacrylic acid solutions

S Khandavalli, Y Chen, N Sharma‐Nene… - Journal of Polymer …, 2023 - Wiley Online Library
We investigate the effect of alcohol fraction (isopropanol, IPA) in a binary water‐alcohol
solvent mixture on the shear and extensional rheological properties, as well as the role of …

Potential of mean force between like-charged nanoparticles: Many-body effect

X Zhang, JS Zhang, YZ Shi, XL Zhu, ZJ Tan - Scientific reports, 2016 - nature.com
Ion-mediated interaction is important for the properties of polyelectrolytes such as colloids
and nucleic acids. The effective pair interactions between two polyelectrolytes have been …