Mitchell Maw, Benjamin J. Morgan, Erfan Dashtimoghadam, Yuan Tian, Egor A. Bersenev, Alina V. Maryasevskaya, Dimitri A. Ivanov, Krzysztof Matyjaszewski, Andrey V. Dobrynin, and Sergei S. Sheiko We unveil universal correlations between architectural parameters and nonlinear elastic properties of brush polymer networks. A comprehensive library of poly(n-butyl acrylate), poly(dimethylsiloxane), … Read more
Michael Jacobs, Heyi Liang, and Andrey V. Dobrynin Hybrid networks are made of different types of polymer strands, which could differ by their degrees of polymerization (DPs), chemical structure, or rigidity (Kuhn length). Examples of such networks include biological networks … Read more
Control the hydrolytic degradation of poly(ester urea)-based biomaterials through the chemical structure.
Connor J. Stubbs, Joshua C. Worch, Hannah Prydderch, Zilu Wang, Robert T. Mathers, Andrey V. Dobrynin, Matthew L. Becker, and Andrew P. Dove Stereochemistry in polymers can be used as an effective tool to control the mechanical and physical properties of … Read more
Ryan Sayko, Zilu Wang, Heyi Liang, Matthew L. Becker, and Andrey V. Dobrynin We performed coarse-grained molecular dynamics simulations of swelling and degradation of copolymer films confined within polymer networks with different values of shear modulus. The microphase separated copolymer … Read more
Capture the features of CLIP 3D printing techniques to optimize the printer design for printing soft materials.
Zilu Wang, Heyi Liang, and Andrey V. Dobrynin 3-D printing is a revolutionary manufacturing technique which makes it possible to fabricate objects of any shape and size that are hard to reproduce by traditional methods. We develop a coarse-grained molecular … Read more
Understand rolling dynamics and contact mechanics of active nanoparticles as drug delivery vehicles.
Yuan Tian, Heyi Liang, and Andrey V. Dobrynin The motion of nanoparticles on soft surfaces is the result of interplay between capillary, elastic and friction forces. To elucidate the importance of the different contributions controlling nanoparticle rolling dynamics on soft … Read more
Yuan Tian, Heyi Liang, and Andrey V. Dobrynin Self-propelled elastic shells capable of transducing energy to rolling motion could have potential applications as drug delivery vehicles. To understand the dynamics of the nanoscale size elastic shells, we performed molecular dynamics … Read more
Understand the effect of electrostatic interactions in determining static and dynamic properties in solutions and gels.
Michael Jacobs, Carlos G. Lopez, and Andrey V. Dobrynin We implemented a scaling approach, based on the relationship between the solution correlation length ξ = lgν/B and the number of repeat units per correlation blob g for polymers with repeat … Read more
Ryan Sayko, Yuan Tian, Heyi Liang, and Andrey V. Dobrynin Coarse-grained molecular dynamics simulations, random phase approximation (RPA) approach, and scaling analysis are used to study static and dynamic properties of concentrated polyelectrolyte solutions of positively charged chains with the … Read more
Create a hydrophobic graphene/polymer composite foam that can absorb organic solvents.
Zilu Wang, Yuan Tian, Heyi Liang, Douglas H. Adamson, and Andrey V. Dobrynin We use a combination of the coarse-grained molecular dynamics simulations and finite difference method calculations to study electromechanical coupling in composite polymer/graphene foams. In these foams, graphene … Read more
Zilu Wang, Heyi Liang, Douglas H. Adamson, and Andrey V. Dobrynin We use coarse-grained molecular dynamics simulations to study the formation of composite polymeric foams made by templated polymerization of emulsions stabilized by graphene sheets (G-sheets) acting as 2D surfactants. … Read more
Understand the adhesion and wetting properties of nanoparticle/soft matter interfaces.
Ryan Sayko, Zhen Cao, Heyi Liang, and Andrey V. Dobrynin Nanoparticles have been recently shown to be able to act as effective adhesives capable of binding two soft materials together. We performed coarse-grained molecular dynamics simulations to study contact mechanics … Read more
Yuan Tian, Maria Ina, Zhen Cao, Sergei S. Sheiko, and Andrey V. Dobrynin Knowledge of the work of adhesion and surface tension directs the design of new materials for coatings, adhesives, and lubricants. We develop an approach to determine both … Read more
Utilize the properties of polymer solutions to extract molecular parameters of polymer chains.
Ryan Sayko, Michael Jacobs, and Andrey V. Dobrynin Knowledge of the interaction parameters for polymers in different solvents is crucial for exploring the viscoelastic properties and processing capabilities of polymer solutions. Here, we apply a scaling theory of semidilute polymer solutions … Read more
Ryan Sayko, Michael Jacobs, and Andrey V. Dobrynin We apply a scaling theory of semidilute polymer solutions to quantify solution properties of polysaccharides such as galactomannan, chitosan, sodium carboxymethyl cellulose, hydroxypropyl methyl cellulose, methyl cellulose, xanthan, apple pectin, cellulose tris(phenyl … Read more