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Displaying 26 - 50 of 269

Hierarchical Cellulose Nanocrystal Blends for Bioinspired Damage Tolerant Photonic Films

May 4, 2018
Author(s)
Bharath NMN Natarajan, Ajay Krishnamurthy, Caglar Dogu Emiroglu, Amanda L. Forster, E. J. Foster, Christoph Weder, Douglas M. Fox, Jan Obrzut, Jeffrey W. Gilman
Attempts to emulate strong and tough natural composites using wood cellulose nanocrystals (CNCs) fall short in mechanical performance due to the low shear transfer ability of CNC interfaces in their helicoidal ensembles. This shortcoming is ascribed to the

Road Mapping Workshop Report on Overcoming Barriers to Adoption of Composites in Sustainable Infrastructure

December 20, 2017
Author(s)
Richard J. Sheridan, Jeffrey W. Gilman, John Busel, David Hartman, Gale A. Holmes, Daniel Coughlin, Paul Kelley, Dustin Troutman, Jim Gutierrez, Charles Bakis, Robert Moser, Ellen Lackey, James R. Fekete, Stephanie S. Watson, Jae Hyun Kim, Aaron M. Forster, Ajay Krishnamurthy, Bharath NMN Natarajan, William O'Donnell
The February 2017 “Road Mapping Workshop on Overcoming Barriers to Adoption of Composites in Infrastructure” brought together designers, manufacturers, researchers, and end-users to identify barriers and potential solutions. Composite products produced in

Moisture Uptake Characterization in Nanocellulose Using Microwave Cavity

August 17, 2017
Author(s)
Caglar Emiroglu, Bharath N. Natarajan, Jeffrey W. Gilman, James Alexander Liddle, Jan Obrzut
Cellulose nanocrystal films with different helical modulation lengths are characterized. Films are obtained by tuning the rate of evaporation and surface functionalization. Dielectric constant measurements are performed and the water confinement is

Phase mask-based multimodal superresolution microscopy

July 6, 2017
Author(s)
Ryan Beams, Jeremiah W. Woodcock, Jeffrey W. Gilman, Stephan J. Stranick
We demonstrate a multimodal superresolution microscopy technique based on a phase masked excitation beam in combination with spatially filtered detection. The theoretical foundation for calculating the focus from a non-paraxial beam with an arbitrary

Dielectric Characterization of Confined Water in Chiral Cellulose Nanocrystal Films

April 10, 2017
Author(s)
Bharath N. Natarajan, Caglar Emiroglu, Jan Obrzut, Douglas M. Fox, Beatriz Pazmino, Jack F. Douglas, Jeffrey W. Gilman
A known deterrent to a large scale development and use of cellulose nanocrystals (CNCs) is their affinity for moisture, which has a profound effect on dispersion, wetting, interfacial adhesion, matrix crystallization and water uptake. To quantify the

A Comparison of Quality of Dispersion of Single Wall Carbon Nanotubes Using Different Surfactants and Biomolecules

February 19, 2017
Author(s)
Jeffrey W. Gilman, R Haggenmueller, Sameer Rahatekar, Jeffrey Fagan, Jae H. Chun, Matthew Becker, Rajesh R. Naik, Todd Krauss, Lisa Carlson, Shana O. Kelley, Paul C. Trulove, D M. Fox, John Kadla
The application of single wall carbon nanotubes (SWCNT) in current and future applications crucially depends on the ability to process SWCNT in a solvent to yield high quality dispersions characterized by individual SWCNTs and possessing a minimum of SWCNT

Delamination of Organo-Modified Layered Double Hydroxides in Polyamide 6 by Melt Processing

February 19, 2017
Author(s)
Mauro Zammarano, S Bellayer, Jeffrey W. Gilman, Massimiliano Franceschi, Frederick Beyer, Richard H. Harris Jr., Meriani Sergio
Layered double hydroxide/polyamide 6 nanocomposites (LDH/PA6) were prepared from organo-modified LDH by melt processing. The anionic exchange capacity of LDH was varied in order to investigate its influence on the degree of exfoliation. LDH were dispersed

Development of High Throughput Methods for Polymer Flammability Property Characterization

February 19, 2017
Author(s)
Jeffrey W. Gilman, Rick D. Davis, John R. Shields, D Wentz, L D. Brassell, A B. Morgan, R Lyon, J E. Zanetto
Recently we have developed several new high throughput (HT) methods to quantitatively evaluate the flammability of flame retarded (FR) polymers. The most recent results are due to the efforts of the High Throughput Methods for Materials Flammability

Dielectric Spectroscopy During Extrusion Processing of Polyamide-6 Nanocomposites

February 19, 2017
Author(s)
Rick D. Davis, Anthony J. Bur, Jeffrey W. Gilman, Young Jong Lee, P R. Start
During extrusion processing dielectric spectroscopy was conducted on polyamide-6 (PA6) and organoclay/polyamide-6 nanocomposites. Off-line curve fitting of the on-line dielectric data generated dielectric dispersion parameters that appear sensitive to
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