Title: Ballistic-diffusive phonon transport in cellulose nanocrystals by ReaxFF molecular dynamics simulations

Journal Article · · International Journal of Heat and Mass Transfer
 [1];  [2];  [3];  [3]
  1. Hangzhou Dianzi Univ. (China); Inst. for Basic Science (IBS), Ulsan (Korea, Republic of); OSTI
  2. Hangzhou Dianzi Univ. (China); Univ. of Missouri, Columbia, MO (United States)
  3. Univ. of Missouri, Columbia, MO (United States)

Cellulose nanocrystals (CNCs), a ubiquitous nano-sized natural biopolymer, have drawn considerable attention in recent years due to their excellent mechanical and chemical properties. However, thermal properties of CNCs, which are critical for their potential applications as structural or functional materials, are less investigated. In this work, their thermal properties were systematically studied by molecular dynamics (MD) simulations in terms of the effects of polymorphs, size, temperature, and strain. It was found that the thermal conductivities depend on the polymorphs of CNCs, but the thermal conductance of unit chain of each polymorph is similar. Moreover, the strong dependence of the thermal conductivities of CNCs on their length and cross-sectional area indicates the existence of remarkable ballistic-diffusive phonon transport. Single chain CNCs can achieve a thermal conductivity of ~6 W/(m∙K), implying their potential as high thermal conductive polymer. The mechanical strain can enhance the alignment of cellulose skeleton, which reduces phonon scattering and thus increases thermal conductivity. Possible underlying mechanism of the varying thermal conductivity was further discussed and attributed to the shift of phonon frequencies and varied degree of orientation. This study reveals the sophisticated ballistic-diffusive phonon transport in CNCs, and pave path to future design of CNC-based materials with desirable thermal properties.

Research Organization:
Univ. of Missouri, Columbia, MO (United States)
Sponsoring Organization:
USDOE; USDOE Office of Fossil Energy (FE)
Grant/Contract Number:
FE0031645
OSTI ID:
1799952
Journal Information:
International Journal of Heat and Mass Transfer, Journal Name: International Journal of Heat and Mass Transfer Vol. 148; ISSN 0017-9310
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (47)

Preparation of Boron Nitride Nanosheet/Nanofibrillated Cellulose Nanocomposites with Ultrahigh Thermal Conductivity via Engineering Interfacial Thermal Resistance journal July 2017
Aerogels with 3D Ordered Nanofiber Skeletons of Liquid-Crystalline Nanocellulose Derivatives as Tough and Transparent Insulators journal July 2014
Cellulose-Builder: A toolkit for building crystalline structures of cellulose journal March 2012
Fast Parallel Algorithms for Short-Range Molecular Dynamics journal March 1995
Recent developments of cellulose materials for lithium-ion battery separators journal July 2017
Systematic characterization of transport and thermoelectric properties of a macroscopic graphene fiber journal September 2016
Chemically doped macroscopic graphene fibers with significantly enhanced thermoelectric properties journal August 2017
Thermal transport in monolayer graphene oxide: Atomistic insights into phonon engineering through surface chemistry journal October 2014
Advanced thermal insulation and absorption properties of recycled cellulose aerogels journal March 2014
Reactive force field simulation on thermal conductivities of carbon nanotubes and graphene journal September 2017
Thermal conductivities of two-dimensional graphitic carbon nitrides by molecule dynamics simulation journal August 2018
Nanocellulose: a new ageless bionanomaterial journal June 2013
High thermal conductivity of polyethylene nanowire arrays fabricated by an improved nanoporous template wetting technique journal April 2011
Crystallite Size Effect on Thermal Conductive Properties of Nonwoven Nanocellulose Sheets journal June 2015
Role of Chain Morphology and Stiffness in Thermal Conductivity of Amorphous Polymers journal January 2016
Thermal Conductance in Cross-linked Polymers: Effects of Non-Bonding Interactions journal April 2017
Biomimetic Optical Cellulose Nanocrystal Films with Controllable Iridescent Color and Environmental Stimuli-Responsive Chromism journal January 2018
In-Plane Anisotropic Thermally Conductive Nanopapers by Drawing Bacterial Cellulose Hydrogels journal March 2017
Multiscale Control of Nanocellulose Assembly: Transferring Remarkable Nanoscale Fibril Mechanics to Macroscale Fibers journal May 2018
Thermal Conductivity in Nanostructured Films: From Single Cellulose Nanocrystals to Bulk Films journal October 2014
ReaxFF:  A Reactive Force Field for Hydrocarbons journal October 2001
ReaxFF Reactive Force Field for Molecular Dynamics Simulations of Hydrocarbon Oxidation journal February 2008
Highly Transparent and Flexible Nanopaper Transistors journal February 2013
High-Contrast, Reversible Thermal Conductivity Regulation Utilizing the Phase Transition of Polyethylene Nanofibers journal August 2013
Cellulose: the structure slowly unravels journal January 1997
Processing bulk natural wood into a high-performance structural material journal February 2018
Experimental study of thermal rectification in suspended monolayer graphene journal June 2017
Length-dependent thermal conductivity in suspended single-layer graphene journal April 2014
High thermal conductivity in amorphous polymer blends by engineered interchain interactions journal November 2014
Polyethylene nanofibres with very high thermal conductivities journal March 2010
High thermal conductivity of chain-oriented amorphous polythiophene journal March 2014
Nanostructured polymer films with metal-like thermal conductivity journal April 2019
Thermal conductance of Teflon and Polyethylene: Insight from an atomistic, single-molecule level journal February 2017
Mechanical performance tailoring of tough ultra-high porosity foams prepared from cellulose I nanofiber suspensions journal January 2010
Cellulose nanomaterials review: structure, properties and nanocomposites journal January 2011
Molecular dynamics simulation of thermal energy transport in polydimethylsiloxane journal April 2011
Thermal properties of the hybrid graphene-metal nano-micro-composites: Applications in thermal interface materials journal February 2012
Effects of polymer topology and morphology on thermal transport: A molecular dynamics study of bottlebrush polymers journal February 2017
Thermal transport in semicrystalline polyethylene by molecular dynamics simulation journal January 2018
Temperature effects in the thermal conductivity of aligned amorphous polyethylene—A molecular dynamics study journal September 2018
Molecular Bridge Thermal Diode Enabled by Vibrational Mismatch journal February 2019
Parametric Model to Analyze the Components of the Thermal Conductivity of a Cellulose-Nanofibril Aerogel journal February 2019
High Thermal Conductivity of Single Polyethylene Chains Using Molecular Dynamics Simulations journal December 2008
Thermal Conductivity of Glasses: Theory and Application to Amorphous Si journal February 1989
Ballistic-Diffusive Heat-Conduction Equations journal March 2001
A radiative cooling structural material journal May 2019
Thermal Transport in Polymers journal January 2014