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Search Publications by: Edwin P Chan (Fed)

Displaying 26 - 50 of 117

Entanglement Density-Dependent Energy Absorption of Polycarbonate Films via Supersonic Fracture

June 18, 2019

Author(s)

Edwin P. Chan, Wanting Xie, Sara V. Orski, Jae-Hwang Lee, Christopher L. Soles

The fracture behavior of glassy polymers is strongly coupled to molecular parameters such as entanglement density as well as extrinsic parameters such as strain rate and test temperature. Here we use laser-induced impact projectile testing (LIPIT) to study

Characterizing salt permeability in polyamide desalination membranes using electrochemical impedance spectroscopy

April 27, 2019

Author(s)

Devin L. Shaffer, Kathleen E. Feldman, Edwin Chan, Gery R. Stafford, Christopher Stafford

Improving the performance of desalination membranes requires better measurements of salt permeability in the polyamide separating layer to elucidate the thermodynamic and kinetic components of membrane permselectivity. In this work, electrochemical

Corona Treatment for High-Throughput, Layer-by-Layer Nano-Transfer Molding

April 2, 2019

Author(s)

Michael Deagan, Edwin Chan, Linda S. Schadler, Chaitanya Ullal

Corona discharge treatment offers a facile, robust, and scalable technique for adhesion promotion in nano-transfer molding. In contrast to conventional plasma treatment, which requires vacuum operation, corona treatment at ambient pressure enabled

Creating Aligned Nanopores by Magnetic Field Processing of Block Copolymer/Homopolymer Blends

February 26, 2019

Author(s)

Yekaterina Rokhlenko, Dimitrios Moschovas, Christina Miskaki, Edwin Chan, Apostolos Avgeropoulos, Chinedum Osuji

Size Effects in Plasma-Enhanced Nano-Transfer Adhesion

November 2, 2018

Author(s)

Michael Deagan, Edwin Chan, Linda Schadler, Chaitanya Ullal

Model Polymer Thin Films to Measure Structure & Dynamics of Confined, Swollen Networks

August 1, 2018

Author(s)

Sara V. Orski, Edwin P. Chan, Kirt A. Page, Kathryn L. Beers

In this chapter, we discuss applying X-ray reflectivity to study the structure and dynamics of dense and ultrathin polymer films upon exposure to solvent vapors. These vapor swelling studies permit the measurement of thermodynamic parameters using

Poroelastic Fracture Transition of a Biopolymer Gel

May 24, 2018

Author(s)

Edwin P. Chan, Bradley R. Frieberg, Ronald L. Jones, Ray-Shimry Garatsa, John Bachert, Benjamin Crawshaw

Controlling the fracture behavior of thermoreversible biopolymer gels is important in many con- sumer based applications. For example, gelatin gels are used in the encapsulation and release in vitamin capsules, the manipulation of texture in gelled foods

Functional Group Quantification of Polymer Nanomembranes with Soft X-rays

March 15, 2018

Author(s)

Daniel F. Sunday, Edwin P. Chan, Sara V. Orski, Ryan C. Nieuwendaal, Christopher M. Stafford

Ring-Opening Metathesis Polymerization as a Robust Platform to Bottlebrush Polymer Networks

March 14, 2018

Author(s)

Joel M. Sarapas, Edwin P. Chan, Emma M. Rettner, Kathryn L. Beers

To fully explore bottlebrush polymer networks as model entanglement-free materials, a robust and versatile synthetic platform is required. Ring-opening metathesis polymerization is a highly controlled, rapid, and functional group tolerant polymerization

Studying Water and Solute Transport through Desalination Membranes via Neutron Radiography

October 25, 2017

Author(s)

Devin L. Shaffer, Jacob M. LaManna, David L. Jacobson, Daniel S. Hussey, Menachem Elimelech, Edwin P. Chan

Neutron radiography, a non-destructive imaging technique, is applied to study water and solute transport through desalination membranes. Specifically, we use neutron radiography to quantify lithium chloride draw solute concentrations across a thin-film

Quantifying the sensitivity of the network structure and properties from simultaneous measurements during photopolymerization

May 5, 2017

Author(s)

Swarnavo Sarkar, Sheng Lin-Gibson, Edwin P. Chan, Martin Y. Chiang, Paula J. Baker

We present a method that combines experimental and computational approaches to assess a comprehensive set of structural and functional evolution during a network formation process via photopolymerization. Our work uses the simultaneous measurement of the

Thin film composite reverse osmosis membranes prepared via layered interfacial polymerization

April 1, 2017

Author(s)

Wansuk Choi, Soon J. Kwon, Jong S. Lee, Joona Bang, Edwin Chan, Jung-Hyun Lee

Reverse osmosis via a thin-film composite (TFC) membrane is currently the most energy efficient commercial process for water desalination1. The retention of salt ions and permeation of water are enabled by the permselective layer of the TFC membrane, with

Thickness-dependent Swelling of Molecular Layer-by-Layer Polyamide Nanomembranes

March 1, 2017

Author(s)

Edwin P. Chan, Stephen Lee

The thickness-dependent water vapor swelling of molecular layer-by-layer polyamide films is studied via specular X-ray reflectivity. The maximum swelling ratio of these ultrathin films scale inversely with thickness but more importantly show a dual-mode