2026-09-20T10:26:07Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/72809 2023-07-11 col_2142_5131 col_2142_14770 com_2142_5130 com_2142_3518 com_2142_234

Mondal, Paramita Wotring, Erik 2015-01-21T19:48:25Z 2015-01-21T19:48:25Z 2014-12 2015-01-21 2014-12 This research investigated the dispersion behavior of graphene nanoplatelets (GNPs) in water with water reducing admixture (WRA), a type of surfactant. The dosage of GNPs was fixed at 0.2wt% of water, and the dosage of the WRA functioned as the controlled variable. Sedimentation experiments qualitatively characterized the stability of the dispersion. The team characterized the time evolution of particle size with dynamic light scattering (DLS). Ultraviolet-visible spectroscopy (UV-vis) measured the time evolution of the opacity of the suspension. Scanning electron microscopy (SEM) gave a qualitative set of micrographs of the particles taken out of the suspension. The team characterized the surface forces with point of zero charge (PZC) experiments. This research has the potential to improve the future application of GNPs to composite materials. The author also carried out mechanical testing. Notched beams were prepared and tested in three-point bending. The data were then analyzed in keeping with the two-parameter fracture model. The mechanical results were inconclusive, but they suggested a path forward to continued research. Item withdrawn by Laura Spradlin (lspradl2@illinois.edu) on 2014-12-08T17:52:46Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Wotring_Erik.pdf: 1440869 bytes, checksum: 486fbe5de0fc4a83099cc3c957d98c0d (MD5) Made available in DSpace on 2015-01-21T19:48:25Z (GMT). No. of bitstreams: 1 Erik_Wotring.pdf: 2992099 bytes, checksum: c76d55a3851bb84fae1211d51e999185 (MD5) http://hdl.handle.net/2142/72809 en Copyright 2014 Erik Wotring graphene nanoplatelet water reducing admixture superplasticizer mortar two parameter fracture model dynamix light scattering (DLS) ultraviolet-visible spectroscopy (UV-vis) scanning electron microscopy (SEM) sedimentation point of zero charge (PZC) Dispersion of graphene nanoplatelets in water with surfactant and reinforcement of mortar with graphene nanoplatelets text Civil & Environmental Eng 1251 Civil Engineering 0106 University of Illinois at Urbana-Champaign Thesis M.S. MS:Civil Engineering -UIUC 10KS0106MS