Sadananda Das
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View article: Effects of orientation and wetting on the crystallization behavior of PEG-b-PCL ultra-thin films
Effects of orientation and wetting on the crystallization behavior of PEG-b-PCL ultra-thin films Open
Polyethylene glycol - polycaprolactone block copolymer (PEG - b - PCL) ultrathin films were fabricated via the solution spin - coating and orientation method. The crystal morphology, structure, and the dependence of orientation on the thic…
View article: Strategies toward the Synthesis of Advanced Functional Sorbent Performance for Uranium Uptake from Seawater
Strategies toward the Synthesis of Advanced Functional Sorbent Performance for Uranium Uptake from Seawater Open
A polymer fiber-based adsorbent (AF1) composed of acrylonitrile and itaconic acid functional groups was synthesized by a radiation-induced graft polymerization technique onto hollow-gear shaped polyethylene (PE) fibers. Investigation of th…
View article: First-Principles Integrated Adsorption Modeling for Selective Capture of Uranium from Seawater by Polyamidoxime Sorbent Materials
First-Principles Integrated Adsorption Modeling for Selective Capture of Uranium from Seawater by Polyamidoxime Sorbent Materials Open
Nuclear power is a relatively carbon-free energy source that has the capacity to be utilized today in an effort to stem the tides of global warming. The growing demand for nuclear energy, however, could put significant strain on our uraniu…
View article: Amidoxime Polymers for Uranium Adsorption: Influence of Comonomers and Temperature
Amidoxime Polymers for Uranium Adsorption: Influence of Comonomers and Temperature Open
Recovering uranium from seawater has been the subject of many studies for decades, and has recently seen significant progress in materials development since the U.S. Department of Energy (DOE) has become involved. With DOE direction, the u…
View article: Investigations into the Reusability of Amidoxime-Based Polymeric Adsorbents for Seawater Uranium Extraction
Investigations into the Reusability of Amidoxime-Based Polymeric Adsorbents for Seawater Uranium Extraction Open
The ability to reuse amidoxime-based polymeric adsorbents is a critical component in reducing the overall cost of the technology to extract uranium from seawater. This paper describes an evaluation of adsorbent reusability in multiple reus…
View article: Efficient Functionalization of Polyethylene Fibers for the Uranium Extraction from Seawater through Atom Transfer Radical Polymerization
Efficient Functionalization of Polyethylene Fibers for the Uranium Extraction from Seawater through Atom Transfer Radical Polymerization Open
Brush-on-brush structures are proposed as one method to overcome support effects in grafted polymers. Utilizing glycidyl methacrylate (GMA) grafted on polyethylene (PE) fibers using radiation-induced graft polymerization (RIGP) provides a …
View article: Predicting Selectivity of Uranium vs. Vanadium from First Principles: Complete Molecular Design and Adsorption Modeling
Predicting Selectivity of Uranium vs. Vanadium from First Principles: Complete Molecular Design and Adsorption Modeling Open
Uranium is used as the basic fuel for nuclear power plants, which generate significant amounts of electricity and have life cycle carbon emissions that are as low as renewable energy sources. The extraction of this valuable energy commodit…
View article: Bicarbonate Elution of Uranium from Amidoxime‐Based Polymer Adsorbents for Sequestering Uranium from Seawater
Bicarbonate Elution of Uranium from Amidoxime‐Based Polymer Adsorbents for Sequestering Uranium from Seawater Open
Uranium adsorbed on amidoxime‐based polyethylene fibers in simulated seawater can be quantitatively eluted using 3 M KHCO 3 at 40 °C. Thermodynamic calculations are in agreement with the experimental observation that at high bicarbonate co…
View article: Summary of Adsorption Capacity and Adsorption Kinetics of Uranium and Other Elements on Amidoxime-based Adsorbents from Time Series Marine Testing at the Pacific Northwest National Laboratory
Summary of Adsorption Capacity and Adsorption Kinetics of Uranium and Other Elements on Amidoxime-based Adsorbents from Time Series Marine Testing at the Pacific Northwest National Laboratory Open
The Pacific Northwest National Laboratory (PNNL) has been conducting marine testing of uranium adsorbent materials for the Fuel Resources Program, Department of Energy, Office of Nuclear Energy (DOE-NE) beginning in FY 2012. The marine tes…
View article: New Fiber Materials with Sorption Capacity at 5.0 g-U/kg Adsorbent under Marine Testing Conditions
New Fiber Materials with Sorption Capacity at 5.0 g-U/kg Adsorbent under Marine Testing Conditions Open
The Fuel Resources program of the Fuel Cycle Research and Development program of the Office of Nuclear Energy (NE) has focused on assuring that nuclear fuel resources are available in the United States for a long term. An immense source of…
View article: The Uranium from Seawater Program at the Pacific Northwest National Laboratory: Overview of Marine Testing, Adsorbent Characterization, Adsorbent Durability, Adsorbent Toxicity, and Deployment Studies
The Uranium from Seawater Program at the Pacific Northwest National Laboratory: Overview of Marine Testing, Adsorbent Characterization, Adsorbent Durability, Adsorbent Toxicity, and Deployment Studies Open
The Pacific Northwest National Laboratory's (PNNL) Marine Science Laboratory (MSL) located along the coast of Washington State is evaluating the performance of uranium adsorption materials being developed for seawater extraction under real…
View article: A report on emergent uranyl binding phenomena by an amidoxime phosphonic acid co-polymer
A report on emergent uranyl binding phenomena by an amidoxime phosphonic acid co-polymer Open
XAFS investigations of uranyl binding by an adsorbent polymer reveal different coordination modes than anticipated from previous small molecule studies.