Skip to Main Content U.S. Department of Energy
Energy and Environment Directorate

Daniel Merkel

Pacific Northwest National Laboratory
PO Box 999
Richland, WA 99352
(509) 372-4891

PNNL Publications

2024

  • Qiao Y., Y. Shin, J.L. Ramos, M.H. Engelhard, R.J. Seffens, D.R. Merkel, and K.L. Simmons. 2024. "Plasma Treatment on Both Adhesive Tape and Adherends for Significantly Enhanced CFRTP-related Adhesive Joints." Applied Surface Science 649. PNNL-SA-189464. doi:10.1016/j.apsusc.2023.159092
  • Yu Z., N. Kanbargi, S. Gupta, Y. Shin, Y. Qiao, C.C. Bowland, and D.R. Merkel, et al. 2024. "Acrylonitrile-butadiene-lignin thermoplastic rubber adhesive for enhanced metal-to-metal joining." Polymer Composites 45, no. 8:7178-7190. PNNL-SA-195240. doi:10.1002/pc.28258

2023

  • Clelland D.T., E.K. Nickerson, and D.R. Merkel. 2023. "DIRECT MEASUREMENT AND CALCULATION OF RUBBER BULK MODULUS BY PISTON-CYLINDER METHOD USING CONVENTIONAL MECHANICAL TESTING EQUIPMENT." Polymer Testing 125. PNNL-SA-184412. doi:10.1016/j.polymertesting.2023.108135
  • Qiao Y., S. Ko, A. Samanta, D.R. Merkel, Y. Shin, A.D. Guzman, and E.K. Nickerson, et al. 2023. "A Micro-scale Numerical Investigation of Internal and Interfacial Void Defects in Adhesive on Failure Behavior of Adhesively-Bonded Materials with Rough Surfaces." In ASME Aerospace Structures, Structural Dynamics, and Materials Conference (SSDM 2023), June 19-21, 2023, San Diego, CA, Paper No: SSDM2023-105653, V001T03A001. New York, New York:ASME. PNNL-SA-181181. doi:10.1115/SSDM2023-105653
  • Qiao Y., Y. Shin, M. Pallaka, E.K. Nickerson, D.R. Merkel, R.J. Seffens, and A. Ortiz, et al. 2023. "Plasma Surface Modification Coupled with Thermal and Step-over Distance Effects on Significant Fracture Improvement of Adhesively-bonded Metal-CFRTP Dissimilar Materials." Composites Science and Technology 232. PNNL-SA-174296. doi:10.1016/j.compscitech.2022.109833
  • Shin Y., Y. Qiao, Y. Ni, J.L. Ramos, E.K. Nickerson, D.R. Merkel, and K.L. Simmons. 2023. "Interfacial bond characterization of epoxy adhesives to aluminum alloy and carbon fiber-reinforced polyamide by vibrational spectroscopy." Surfaces and Interfaces 42, no. Part A:Art. No. 103346. PNNL-SA-185204. doi:10.1016/j.surfin.2023.103346

2022

  • Clelland D.T., D.R. Merkel, E.K. Nickerson, K.P. Brooks, V.V. Joshi, C.A. Lavender, and Z.F. Huber. 2022. "Forming Complex Nuclear Fuel Shapes in High-Loaded Silicide Surrogates." In Proceedings of the 42nd International Meeting on Reduced Enrichment for Research and Test Reactors (RERTR 2022), October 3-5, 2022, Vienna, Austria. Lemont, Illinois:Argonne National Laboratory. PNNL-SA-178118.
  • Qiao Y., D.R. Merkel, E.K. Nickerson, R.J. Seffens, Y. Shin, M. Pallaka, and J.L. Ramos, et al. 2022. "The Roles of Interface, Adherend, and Adhesive in Plasma- and Other-treated Joints of Metals and FRP Materials Under Shear Deformation." In Proceedings of the American Society for Composites - 37th Technical Conference, (ASC 2022), September 19-21, 2022, Tucson, AZ, edited by O. Zhupanska and E. Madenci. Lancaster, Pennsylvania:DEStech Publications, Inc. PNNL-SA-174097. doi:10.12783/asc37/36378
  • Qiao Y., D.R. Merkel, E.K. Nickerson, Y. Shin, R.J. Seffens, A. Ortiz, and K.L. Simmons. 2022. "Mode I Tensile Fracture Behavior of Adhesively-bonded Metal-Metal, Metal-CFRP, and CFRP-CFRP Bi-material Combinations Analyzed by Size Effect Method." Composites. Part A, Applied science and manufacturing 160. PNNL-SA-170430. doi:10.1016/j.compositesa.2022.107025
  • Qiao Y., Y. Shin, E.K. Nickerson, D.R. Merkel, A. Ortiz, and K.L. Simmons. 2022. "Adhesively-bonded Metal-CFRTP Bi-materials: Enhanced Crack Growth Resistance via Plasma and Quantified Fracture via Size Effect Method." In Proceedings of the American Society for Composites - 37th Technical Conference, (ASC 2022), September 19-21, 2022, Tucson, AZ, edited by O. Zhupanska and E. Madenci. Lancaster, Pennsylvania:DEStech Publications, Inc. PNNL-SA-173713. doi:10.12783/asc37/36496
  • Shin Y., Y. Qiao, N.L. Canfield, Z. Yu, H. Meyer, D.R. Merkel, and E.K. Nickerson, et al. 2022. "Significant slowdown of plasma-optimized surface energy deactivation by vacuum sealing for efficient adhesive bonding." Composites Part B: Engineering 240. PNNL-SA-170346. doi:10.1016/j.compositesb.2022.110001
  • Simmons K.L., L.D. Fring, W. Kuang, Y. Shin, Y. Chou, Y. Ni, and Y. Qiao, et al. 2022. Gap Analysis on the Impacts of Hydrogen Addition to the North American Natural Gas Infrastructure Polyethylene Pipelines. PNNL-33736. Richland, WA: Pacific Northwest National Laboratory. Gap Analysis on the Impacts of Hydrogen Addition to the North American Natural Gas Infrastructure Polyethylene Pipelines

2021

  • Cosimbescu L., D.R. Merkel, J.T. Darsell, and G. Petrossian. 2021. "Simple but tricky: Investigations of terephthalic acid purity obtained from mixed PET waste." Industrial and Engineering Chemistry Research 60, no. 35:12792-12797. PNNL-SA-162009. doi:10.1021/acs.iecr.1c02604
  • Merkel D.R., E.K. Nickerson, R.J. Seffens, K.L. Simmons, C.W. San Marchi, B.J. Kagay, and J.A. Ronevich. 2021. "Effect of hydrogen on tensile properties of 304L stainless steel at cryogenic temperatures." In Proceedings of the ASME Pressure Vessels & Piping Conference (PVP 2021), July 13-15, 2021, Virtual, Online, 4, Paper No: PVP2021-62436, V004T06A055. New York, New York:ASME. PNNL-SA-159130. doi:10.1115/PVP2021-62436
  • Nguyen B., H. Roh, D.R. Merkel, and K.L. Simmons. 2021. "A Predictive Modeling Tool for Damage Analysis and Design of Hydrogen Storage Composite Pressure Vessels." International Journal of Hydrogen Energy 46, no. 39:20573-20585. PNNL-SA-159535. doi:10.1016/j.ijhydene.2021.03.139
  • Nguyen B., H. Roh, D.R. Merkel, K.I. Johnson, and K.L. Simmons. 2021. "A Multiscale Modeling Approach to Cryocompressed Hydrogen Storage Pressure Vessels - Part II: Constitutive Modeling and Finite Element Analysis." In International SAMPE Technical Conference & Exposition (SAMPE neXus 2021), June 29-July 1, 2021, VIrtual, Online, 2021-June, 1202 - 1210. Diamond Bar, California:Society for the Advancement of Material and Process Engineering. PNNL-SA-150459.

2020

  • Kuang W., S. Lee, B. Zhao, L.S. Fifield, K.L. Simmons, J. Zhang, and T.T. Bisel, et al. 2020. Malleable Thermosets (Vitrimers) from CO2 and Plants. PNNL-30668. Richland, WA: Pacific Northwest National Laboratory. Malleable Thermosets (Vitrimers) from CO2 and Plants
  • Merkel D.R., G. Petrossian, D.T. Clelland, and K.L. Simmons. 2020. "A Mechanical Test Frame for Property Evaluations at Cryogenic Temperature." In International SAMPE Technical Conference and Exhibition, June 1, 2020, Virtual, Online, 2020-June. Diamond Bar, California:Society for the Advancement of Material and Process Engineering. PNNL-SA-150569.
  • Merkel D.R., W. Kuang, D. Malhotra, G. Petrossian, L. Zhong, K.L. Simmons, and J. Zhang, et al. 2020. "Waste PET Chemical Processing to Terephthalic Amides and Their Effect on Asphalt Performance." ACS Sustainable Chemistry & Engineering 8, no. 14:5615-5625. PNNL-SA-150317. doi:10.1021/acssuschemeng.0c00036
  • Nguyen B., D.R. Merkel, K.I. Johnson, D.W. Gotthold, K.L. Simmons, and H. Roh. 2020. "Modeling The Effects of Loading Scenario and Thermal Expansion Coefficient on Potential Failure of Cryo-compressed Hydrogen Vessels." International Journal of Hydrogen Energy 45, no. 46:24883-24894. PNNL-SA-146107. doi:10.1016/j.ijhydene.2019.09.200

2019

  • Simmons K.L., L. Cosimbescu, J. Zhang, D.R. Merkel, and W. Kuang. 2019. Polymer and Composite Recycle and Upcycling. PNNL-29340. Richland, WA: Pacific Northwest National Laboratory. Polymer and Composite Recycle and Upcycling

Energy and Environment

Core Research Areas

Contacts