A5034644621- Polymer Nanocomposites and Properties
- Conducting polymers and applications
- Microfluidic and Capillary Electrophoresis Applications
- Protein purification and stability
- Monoclonal and Polyclonal Antibodies Research
- Surface Modification and Superhydrophobicity
- Electrochemical sensors and biosensors
- Membrane Separation Technologies
- Polymer crystallization and properties
- Membrane Separation and Gas Transport
- Analytical Chemistry and Sensors
- Electrochemical Analysis and Applications
- Solar-Powered Water Purification Methods
- Organic Electronics and Photovoltaics
- Nanopore and Nanochannel Transport Studies
- Protein Structure and Dynamics
- Advanced Sensor and Energy Harvesting Materials
- Electrohydrodynamics and Fluid Dynamics
- Fuel Cells and Related Materials
- Spectroscopy and Quantum Chemical Studies
- Lipid Membrane Structure and Behavior
- Polymer Surface Interaction Studies
- Advanced Polymer Synthesis and Characterization
- Photopolymerization techniques and applications
- Material Dynamics and Properties
University of Pennsylvania
2017-2024
The University of Texas at Austin
2021-2023
University of Massachusetts Lowell
2008-2022
California University of Pennsylvania
2017-2019
Philadelphia University
2017-2019
Rubber Board
2018
Massachusetts Institute of Technology
2015
Interfacial evaporation using porous hydrogels has demonstrated highly effective solar performance under natural sunlight to ensure an affordable clean water supply. However, it remains challenging realize scalable and ready-to-use hydrogel materials with durable mechanical properties. Here, self-assembled templating (SAT) is developed as a simple yet method fabricate large-scale elastic evaporators excellent desalination performance. The interconnected structure of the low tortuosity...
Nanofibers of polyaniline and oligoanilines controlled molecular weight, e.g., tetraaniline, octaaniline, hexadecaaniline, are synthesized using a versatile high ionic strength aqueous system that permits the use H2O2 with no added catalysts as mild oxidizing agent. Films deposited on plastic substrates show robust reversible chemiresistor response to NO2 vapor at room temperature in ambient air (100−5 ppm).
Attractive protein–protein interactions in concentrated monoclonal antibody (mAb) solutions may lead to the formation of clusters that increase viscosity. Here, we propose an analytical model relates mAb solution viscosity clustering by accounting for contributions suboptimal packing within a cluster and fractal dimension. The influence short-range, anisotropic attractions long-range Coulombic repulsion on properties is investigated analyzing cluster-size distributions, dimensions, radial...
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication the EditorNEXTOrigin of Bulk Nanoscale Morphology in Conducting PolymersSumedh P. Surwade, Neha Manohar, and Sanjeev K. Manohar*View Author Information Department Chemical Engineering, University Massachusetts Lowell, 01854* Corresponding author: e-mail [email protected]; Ph 978-934-3162.Cite this: Macromolecules 2009, 42, 6, 1792–1795Publication Date (Web):March 2, 2009Publication History Received21 January 2009Revised18...
The effects of a subclass monoclonal antibodies (mAbs) on protein-protein interactions, formation reversible oligomers (clusters), and viscosity (η) are not well understood at high concentrations. Herein, we quantify short-range anisotropic attraction between the complementarity-determining region (CDR) CH3 domains (K
Understanding phase transitions of fluids confined within nanopores is important for a wide variety technological applications. It well known that in typically demonstrate freezing-point depressions, ΔTf, described by the Gibbs-Thomson (GT) equation. Herein, we highlight and correct several thermodynamic inconsistencies conventional use GT equation, including fact enthalpy melting, ΔHm, solid-liquid surface energy, γ(SL), are functions pore diameter, complicating their prediction. We propose...
Despite their wide potential utility, the manufacture of polymer–nanoparticle (NP) composites with high filler fractions presents significant challenges because difficulties associated dispersing and mixing volume NPs in polymer matrices. Polymer-infiltrated nanoparticle films (PINFs) circumvent these issues, allowing fabrication functional extremely (>50 vol %). In this work, we present a one-step, room-temperature method for porous PINF through solvent-driven infiltration (SIP) into NP...
Understanding the dynamics of polymers in confined environments is pivotal for diverse applications ranging from polymer upcycling to bioseparations. In this study, we develop an entropic barrier model using self-consistent field theory that considers effect attractive surface interactions, solvation, and confinement on kinetics. model, consider translocation a one cavity into second through single-segment-width nanopore. We find that, good solvent (i.e., excluded volume, u0 > 0), there...
Abstract Interfacial evaporation using porous hydrogels has demonstrated highly effective solar performance under natural sunlight to ensure an affordable clean water supply. However, it remains challenging realize scalable and ready‐to‐use hydrogel materials with durable mechanical properties. Here, self‐assembled templating (SAT) is developed as a simple yet method fabricate large‐scale elastic evaporators excellent desalination performance. The interconnected structure of the low...
A facile process to fabricate multiphasic nanocomposite films consisting of polymer blends and high loadings nanoparticles is developed.
Dynamics of polymer motion into solvent-filled interstices nanoparticle packings can be controlled by tuning the polymer–nanoparticle interactions, whose effect on rate infiltration is non-monotonic as shown MD simulations.
Understanding protein-protein interactions and formation of reversible oligomers (clusters) in concentrated monoclonal antibody (mAb) solutions is necessary for designing stable, low viscosity (η) formulations processing subcutaneous injection. Here we characterize the strength (K) short-range anisotropic attractions (SRA) 75-200 mg/mL mAb2 at different pH cosolute conditions by analyzing structure factors (Seff(q)) from small-angle X-ray scattering (SAXS) using coarse-grained molecular...
Aniline and its ring-substituted derivatives are oxidatively polymerized by H2O2 to the corresponding electrically conductive emeraldine oxidation state in dilute aqueous acids when 5 M CaCl2 is added as an ionic strength booster. Evidence consistent with intermediacy of HOCl primary oxidant presented, which formed situ this system. This study significantly advances scope our previous report on aniline polymerization using H2O2/NaCl/HCl For example, H2O2/CaCl2/HCl system increases reaction...
Abstract Bulk quantities of parent polythiophene nanofibers can be synthesized rapidly and in one step by chemical oxidative polymerization thiophene FeCl3 using freeze-dried vanadium pentoxide as seeds.
Nanocomposite films containing a high volume fraction (> 50vol%) of nanoparticles (NPs) in polymer matrix are promising for their functionality and use as structural coatings, also provide unique platform to understand behavior under strong confinement. Previously, we developed novel technique fabricate such nanocomposites at room temperature using solvent-driven infiltration (SIP) into NP packings. In the SIP process, bilayer made an underlying film dense packing NPs is exposed solvent...
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionNEXTORIGINAL ARTICLEThis notice is a correctionCorrection to "Nanostructured Polyanilines Using the H2O2/CaCl2 Oxidant System"Lekha PapammagariLekha PapammagariDepartment of Chemical Engineering, University Massachusetts Lowell, 01854, United StatesMore by Lekha Papammagari, Srikanth Rao AgnihotraSrikanth AgnihotraDepartment Agnihotra, Purnatosh SahaPurnatosh SahaDepartment Plastics Saha, Neha ManoharNeha ManoharDepartment...