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Title: Elucidating the Variable-Temperature Mechanical Properties of a Negative Thermal Expansion Metal–Organic Framework

Abstract

Here, we report the first experimental study into the thermomechanical and viscoelastic properties of a metal–organic framework (MOF) material. Nanoindentations show a decrease in the Young’s modulus, consistent with classical molecular dynamics simulations, and hardness of HKUST-1 with increasing temperature over the 25–100 °C range. Variable-temperature dynamic mechanical analysis reveals significant creep behavior, with a reduction of 56% and 88% of the hardness over 10 min at 25 and 100 °C, respectively. This result suggests that, despite the increased density that results from increasing temperature in the negative thermal expansion MOF, the thermally induced softening due to vibrational and entropic contributions plays a more dominant role in dictating the material’s temperature-dependent mechanical behavior.

Authors:
ORCiD logo [1];  [2]; ORCiD logo [3]; ORCiD logo [1];  [2]; ORCiD logo [2]
  1. Univ. of Amsterdam (Netherlands). Van‘t Hoff Inst. for Molecular Sciences (HIMS)
  2. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  3. Univ. of Cambridge (United Kingdom). Dept. of Materials Science and Metallurgy
Publication Date:
Research Org.:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1464192
Report Number(s):
SAND-2018-7644J
Journal ID: ISSN 1944-8244; 665803
Grant/Contract Number:  
AC04-94AL85000; NA0003525; UvA385
Resource Type:
Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 10; Journal Issue: 25; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; dynamic mechanical analysis; elasticity; HKUST-1; mechanical properties; metal−organic frameworks; molecular dynamics; nanoindentations; negative thermal expansion

Citation Formats

Heinen, Jurn, Ready, Austin D., Bennett, Thomas D., Dubbeldam, David, Friddle, Raymond W., and Burtch, Nicholas C. Elucidating the Variable-Temperature Mechanical Properties of a Negative Thermal Expansion Metal–Organic Framework. United States: N. p., 2018. Web. doi:10.1021/acsami.8b06604.
Heinen, Jurn, Ready, Austin D., Bennett, Thomas D., Dubbeldam, David, Friddle, Raymond W., & Burtch, Nicholas C. Elucidating the Variable-Temperature Mechanical Properties of a Negative Thermal Expansion Metal–Organic Framework. United States. doi:10.1021/acsami.8b06604.
Heinen, Jurn, Ready, Austin D., Bennett, Thomas D., Dubbeldam, David, Friddle, Raymond W., and Burtch, Nicholas C. Tue . "Elucidating the Variable-Temperature Mechanical Properties of a Negative Thermal Expansion Metal–Organic Framework". United States. doi:10.1021/acsami.8b06604. https://www.osti.gov/servlets/purl/1464192.
@article{osti_1464192,
title = {Elucidating the Variable-Temperature Mechanical Properties of a Negative Thermal Expansion Metal–Organic Framework},
author = {Heinen, Jurn and Ready, Austin D. and Bennett, Thomas D. and Dubbeldam, David and Friddle, Raymond W. and Burtch, Nicholas C.},
abstractNote = {Here, we report the first experimental study into the thermomechanical and viscoelastic properties of a metal–organic framework (MOF) material. Nanoindentations show a decrease in the Young’s modulus, consistent with classical molecular dynamics simulations, and hardness of HKUST-1 with increasing temperature over the 25–100 °C range. Variable-temperature dynamic mechanical analysis reveals significant creep behavior, with a reduction of 56% and 88% of the hardness over 10 min at 25 and 100 °C, respectively. This result suggests that, despite the increased density that results from increasing temperature in the negative thermal expansion MOF, the thermally induced softening due to vibrational and entropic contributions plays a more dominant role in dictating the material’s temperature-dependent mechanical behavior.},
doi = {10.1021/acsami.8b06604},
journal = {ACS Applied Materials and Interfaces},
number = 25,
volume = 10,
place = {United States},
year = {2018},
month = {6}
}

Journal Article:
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