Curvature effects upon interactions of polymer-grafted nanoparticles in chemically identical polymer matrices

Trombly, David M.; Ganesan, Venkat

doi:10.1063/1.3493330

Cited by 116 publications

(157 citation statements)

References 57 publications

Supporting

Mentioning

146

Contrasting

Order By: Relevance

“…22,24,26,33,37,42,50,88,90,95,109,[119][120][121][122]125,[143][144][145][146][147][148][149][150] Ganesan et al 22 have shown that the morphologies adopted by grafted NPs in a selective solvent are sensitively determined by the ratio of the NP core size to the native size of the polymeric grafts. Recent work by Jayaraman, 88,89,92 which is in good agreement with experiments, illustrates that the polydispersity of graft lengths can play a critical role in the miscibility of NPs in a polymer matrix with the same chemistry as the brush.…”

Section: Grafted Nanoparticlesmentioning

confidence: 99%

Perspective: Outstanding theoretical questions in polymer-nanoparticle hybrids

Kumar

Ganesan

Riggleman

2017

The Journal of Chemical Physics

Self Cite

171

143

View full text Add to dashboard Cite

This topical review discusses the theoretical progress made in the field of polymer nanocomposites, i.e., hybrid materials created by mixing (typically inorganic) nanoparticles (NPs) with organic polymers. It primarily focuses on the outstanding issues in this field and is structured around five separate topics: (i) the synthesis of functionalized nanoparticles; (ii) their phase behavior when mixed with a homopolymer matrix and their assembly into well-defined superstructures; (iii) the role of processing on the structures realized by these hybrid materials and the role of the mobilities of the different constituents; (iv) the role of external fields (electric, magnetic) in the active assembly of the NPs; and (v) the engineering properties that result and the factors that control them. While the most is known about topic (ii), we believe that significant progress needs to be made in the other four topics before the practical promise offered by these materials can be realized. This review delineates the most pressing issues on these topics and poses specific questions that we believe need to be addressed in the immediate future. Published by AIP Publishing. [http://dx

show abstract

Section: Grafted Nanoparticlesmentioning

confidence: 99%

Perspective: Outstanding theoretical questions in polymer-nanoparticle hybrids

Kumar

Ganesan

Riggleman

2017

The Journal of Chemical Physics

Self Cite

171

143

View full text Add to dashboard Cite

show abstract

“…The cumulative mass distributions, shown in the inset to Figure 3, are almost identical for all matrix molar masses. Since R n /R g > 1, the theory of Trombly and Ganesan 65 predicts that the "wet to dry" transition should occur for N f /N g < 1. This requirement would be fullfilled by studying even shorter matrix chains.…”

Section: Influence Of Grafted Chain Molar Massmentioning

confidence: 99%

Structure of Polymer Layers Grafted to Nanoparticles in Silica–Polystyrene Nanocomposites

2013

View full text Add to dashboard Cite

Abstract:The structural features of polystyrene brushes grafted on spherical silica nanoparticles immersed in polystyrene are investigated by means of a Monte Carlo methodology based on polymer mean field theory. The nanoparticle radii (either 8 nm or 13 nm) are held constant, while the grafting density and the lengths of grafted and matrix chains are varied systematically in a series of simulations. The primary objective of this work is to simulate realistic nanocomposite systems of specific chemistry at experimentally accessible length scales and study the structure and scaling of the grafted brush. The profiles of polymer density around the particles are examined; based on them, the brush thickness of grafted chains is estimated and its scaling behavior is compared against theoretical models and experimental findings. Then, neutron scattering spectra are predicted both from single grafted chains and from the entire grafted corona. It is found that increasing both the grafting density and the grafted chain molar mass drastically alters the brush dimensions, affecting the wetting behavior of the polymeric brush. On the contrary, especially for particles dispersed in high molecular weight matrix, variation of the matrix chain length causes an almost imperceptible change of the density around the particle surface.

show abstract

“…Indeed, recent SCF calculations have shown that wetting-dewetting transition is shifted to much larger values of P/N ratio for highly curved sterically stabilized nanoparticles. [21] This change in the nature of the lock-key PMF from attractive to repulsive with increasing volume fraction (when P > N ) provides one possible way for tuning interactions in sterically stabilized lock-key colloidal systems. Hence, it would be of interest to decompose the total polymer-induced PMF according to Eq.…”

Section: Resultsmentioning

confidence: 99%

Sterically stabilized lock and key colloids: A self-consistent field theory study

Егоров

2011

The Journal of Chemical Physics

View full text Add to dashboard Cite

A self-consistent field theory study of lock and key type interactions between sterically stabilized colloids in polymer solution is performed. Both the key particle and the lock cavity are assumed to have cylindrical shape, and their surfaces are uniformly grafted with polymer chains. The lockkey potential of mean force is computed for various model parameters, such as length of free and grafted chains, lock and key size matching, free chain volume fraction, grafting density, and various enthalpic interactions present in the system. The lock-key interaction is found to be highly tunable, which is important in the rapidly developing field of particle self-assembly.

show abstract

Curvature effects upon interactions of polymer-grafted nanoparticles in chemically identical polymer matrices

Cited by 116 publications

References 57 publications

Perspective: Outstanding theoretical questions in polymer-nanoparticle hybrids

Perspective: Outstanding theoretical questions in polymer-nanoparticle hybrids

Structure of Polymer Layers Grafted to Nanoparticles in Silica–Polystyrene Nanocomposites

Sterically stabilized lock and key colloids: A self-consistent field theory study

Contact Info

Product

Resources

About