DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Hollow‐Structured Materials for Thermal Insulation

Journal Article · · Advanced Materials

Abstract Heating and cooling represent a significant portion of overall energy consumption of our society. Due to the diffusive nature of thermal energy, thermal insulation is critical for energy management to reduce energy waste and improve energy efficiency. Thermal insulation relies on the reduction of thermal conductivity of appropriate materials that are engineerable in compositions and structures. Hollow‐structured materials (HSMs) show a great promise in thermal insulation since the existence of high‐density gaseous voids breaks the continuity of heat‐transport pathways in the HSMs to lower their thermal conductivities efficiently. Herein, a timely overview of the recent progress in developing HSMs for thermal insulation is presented, with the focus on summarizing the strategies for creating gaseous voids in solid materials and thus synthesizing various HSMs. Systematic analysis of the documented results reveals the relationship of thermal conductivities of the HSMs and the size and density of voids, i.e., reducing the void size below ≈350 nm is more favorable to decrease the thermal conductivity of the HSMs because of the possible confinement effect originated from the nanometer‐sized voids. The challenges and promises of the HSMs faced in future research are also discussed.

Sponsoring Organization:
USDOE
Grant/Contract Number:
DE‐AR0000739
OSTI ID:
1480143
Journal Information:
Advanced Materials, Journal Name: Advanced Materials Vol. 31 Journal Issue: 38; ISSN 0935-9648
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English
Citation Metrics:
Cited by: 207 works
Citation information provided by
Web of Science

References (133)

Preparation of Monolithic Silica Aerogel of Low Thermal Conductivity by Ambient Pressure Drying journal July 2007
On thermal conductivity of micro- and nanocellular polymer foams journal January 2013
Effect of microstructure and physical parameters of hollow glass microsphere on insulation performance journal June 2011
Comparative studies of the physical and hydrophobic properties of TEOS based silica aerogels using different co-precursors journal January 2003
Thermal conductivity of open-cell polyolefin foams journal January 2007
Experimental validation of the Knudsen effect in nanocellular polymeric foams journal January 2015
Thermal conductivity of low density carbon aerogels journal July 2011
Gaseous heat conduction at low pressures and temperatures journal April 1959
High and low thermal conductivity of amorphous macromolecules journal January 2017
Hollow glass microsphere HDPE composites for low energy sustainability journal March 2010
Silicon rubber/hollow glass microsphere composites: Influence of broken hollow glass microsphere on mechanical and thermal insulation property journal April 2013
Porous media gas diffusivity from a free path distribution model journal June 1985
Low-density and structure-tunable microcellular PMMA foams with improved thermal-insulation and compressive mechanical properties journal October 2017
Thermal Conductivity, Heat Capacity, and Elastic Constants of Water-Soluble Polymers and Polymer Blends journal January 2016
Templated cross-linking reactions for designing nanoporous materials journal September 2007
Experimental characterization and theoretical modeling of the infrared-optical properties and the thermal conductivity of foams journal December 2015
Nanocellular polymer foams as promising high performance thermal insulation materials journal April 2015
Heat transfer in open cell polyurethane foam insulation journal November 1998
Radiative heat transfer study on silica aerogel and its composite insulation materials journal February 2013
Polymer nanocomposite foams journal January 2013
Rigid polyurethane foams with infused nanoclays: Relationship between cellular structure and thermal conductivity journal July 2016
A structural and thermal conductivity study of highly porous, hierarchical polyhedral nanofoam shells made by condensing silica in microemulsion films on the surface of emulsified oil drops journal January 2013
Advanced bimodal polystyrene/multi-walled carbon nanotube nanocomposite foams for thermal insulation journal August 2017
Thermal conductivity of powder silica hollow spheres journal November 2011
Gas Diffusion, Energy Transport, and Thermal Accommodation in Single-Walled Carbon Nanotube Aerogels journal August 2012
Thermal and electrical conductivity of monolithic carbon aerogels journal January 1993
Thermal transport in nano-porous insulation of aerogel: Factors, models and outlook journal October 2015
Correlation between structure and thermal conductivity of organic aerogels journal August 1995
Ballistic Phonon Transport in Holey Silicon journal April 2015
Thermal characterization of carbon-opacified silica aerogels journal June 1995
High thermal insulation and compressive strength polypropylene foams fabricated by high-pressure foam injection molding and mold opening of nano-fibrillar composites journal October 2017
Aerogels—Airy Materials: Chemistry, Structure, and Properties journal February 1998
Super insulating aerogel glazing journal November 2005
Effect of hybrid hollow microspheres on thermal insulation performance and mechanical properties of silicone rubber composites journal November 2017
Thermal conductivity of plastic foams journal April 1983
Prediction of the Effective Thermal Conductivity of Hollow Sphere Foams journal February 2018
Formation and characterization of polyurethane-vermiculite clay nanocomposite foams journal September 2008
Thermal and Electrical Transport in Ultralow Density Single-Walled Carbon Nanotube Networks journal April 2013
Understanding Thermal Insulation in Porous, Particulate Materials journal September 2017
Improved transparent thermal insulation using nano-spaces journal May 2015
Diffusons, locons and propagons: Character of atomie yibrations in amorphous Si journal November 1999
Relationship between pore size and the gas pressure dependence of the gaseous thermal conductivity journal June 2007
Modeling of rarefied gas heat conduction between wafer and susceptor journal January 1998
Development of micro / nano-size hollow silicate particles for thermal energy saving application journal January 2016
Minimal contact formation between hollow glass microparticles toward low-density and thermally insulating composite materials journal February 2017
Thermal conductivity of polymer filled with carbon materials: Effect of conductive particle chains on thermal conductivity journal May 1985
Thermal conductivity of polyurethane foams journal June 1999
Effects of organoclay on the thermal insulating properties of rigid polyurethane poams blown by environmentally friendly blowing agents journal December 2007
An empirical model to predict temperature-dependent thermal conductivity of amorphous polymers journal May 2017
Aerogels Handbook book January 2011
The Relation between Heat Conductivity and Structure in Silica Aerogel journal January 1935
Structural regulation of hollow spherical TiO2 by varying titanium source amount and their thermal insulation property journal January 2018
Hollow silica sphere colloidal crystals: insights into calcination dependent thermal transport journal January 2015
Thermally insulating and fire-retardant lightweight anisotropic foams based on nanocellulose and graphene oxide journal November 2014
Testing the minimum thermal conductivity model for amorphous polymers using high pressure journal May 2011
Thermal conductivities study on silica aerogel and its composite insulation materials journal May 2011
Lightweight, super-elastic, and thermal-sound insulation bio-based PEBA foams fabricated by high-pressure foam injection molding with mold-opening journal June 2018
Effect of wall thickness of hollow TiO2 spheres on properties of polyacrylate film: Thermal insulation, UV-shielding and mechanical property journal November 2017
Effective thermal conductivity of the solid backbone of aerogel journal September 2013
Effects of solid–gas coupling and pore and particle microstructures on the effective gaseous thermal conductivity in aerogels journal July 2012
Comparison of atomic-level simulation methods for computing thermal conductivity journal April 2002
Development of hydrophobic and optically transparent monolithic silica aerogels for window panel applications journal October 2016
Thermal conductivity of single-walled carbon nanotubes journal June 1999
Low density thermoplastic nanofoams nucleated by nanoparticles journal May 2013
Vacuum insulation panels for building applications: A review and beyond journal February 2010
Radiation heat transfer in foam insulation journal January 1987
Nanostructured interpenetrated organic-inorganic aerogels with thermal superinsulating properties journal November 2016
Aerogel insulation for building applications: A state-of-the-art review journal April 2011
The development of a monolithic aerogel glazed window for an energy retrofitting project journal September 2015
Thermal conductivity of amorphous solids above the plateau journal March 1987
Thermal Conductivity of Silica Aërogel journal June 1934
Hollow Silica as an Optically Transparent and Thermally Insulating Polymer Additive journal December 2015
Thermal conductivity of fiber and opacifier loaded silica aerogel composite journal December 2017
Low-density graphene/carbon composite aerogels prepared at ambient pressure with high mechanical strength and low thermal conductivity journal January 2015
Ultra-tough and super thermal-insulation nanocellular PMMA/TPU journal October 2017
Porous Materials and Supercritical Fluids journal July 2003
Transparent organosilicate hybrid films with thermally insulating and UV-blocking properties based on silica/titania hybrid hollow colloidal shells journal March 2013
Nanoporous polymeric materials: A new class of materials with enhanced properties journal June 2016
Radiative characteristics of opacifier-loaded silica aerogel composites journal September 2013
Chemistry of Aerogels and Their Applications journal November 2002
Drying gels journal June 1989
Radiative properties and heat transfer characteristics of fiber-loaded silica aerogel composites for thermal insulation journal September 2012
Microstructural, mechanical, and thermal‐insulation properties of poly(methyl methacrylate)/silica aerogel bimodal cellular foams journal September 2016
Nanodispersions of carbon nanofiber for polyurethane foaming journal July 2010
Thermal conductivity and compressive properties of hollow glass microsphere filled epoxy–matrix composites journal June 2015
Structure-Property Relationships in Polyolefin Foams journal May 2001
Measurement of thermal conductivity of hollow glass-bead-filled polypropylene composites journal June 2006
Simulation of heat transfer in hollow-glass-bead-filled polypropylene composites by finite element method journal May 2007
Thermally Stable Mesoporous Poly(ether sulfone) Monoliths with Nanofiber Network Structures journal December 2017
A state-of-the-art review on innovative glazing technologies journal January 2015
Low-thermal-conductivity nitrogen-doped graphene aerogels for thermal insulation journal January 2016
Mean free path spectra as a tool to understand thermal conductivity in bulk and nanostructures journal January 2013
Polymer nano-foams for insulating applications prepared from CO2 foaming journal February 2015
Dependence of Thermal Properties of Expandable Polystyrene Particle Foam on Cell Size and Density journal March 2010
Development of high thermal insulation and compressive strength BPP foams using mold-opening foam injection molding with in-situ fibrillated PTFE fibers journal January 2018
Moisture-absorption, dielectric relaxation, and thermal conductivity studies of polymer composites journal September 1998
CO 2 -blown nanocellular foams journal August 2014
Monodisperse Hollow Silica Nanospheres for Nano Insulation Materials: Synthesis, Characterization, and Life Cycle Assessment journal January 2013
Modelling of thermal transport through a nanocellular polymer foam: toward the generation of a new superinsulating material journal January 2017
Prediction of the gaseous thermal conductivity in aerogels with non-uniform pore-size distribution journal December 2012
Low-cost and fast synthesis of nanoporous silica cryogels for thermal insulation applications journal June 2012
Influence of Solid Phase Conductivity and Cellular Structure on the Heat Transfer Mechanisms of Cellular Materials: Diverse Case Studies journal October 2009
Aerogel-based thermal insulation journal April 1998
Advances in Thermal Insulation of Extruded Polystyrene Foams journal May 2011
Fabrication of Hollow TiO$lt;inf$gt;2$lt;/inf$gt; Spheres and Their Effect on Thermal Insulation Property of Polyacrylate Film journal January 2017
Polymethylsilsesquioxane–Cellulose Nanofiber Biocomposite Aerogels with High Thermal Insulation, Bendability, and Superhydrophobicity journal June 2014
Low thermalconductive, transparent and hydrophobic ambient pressure dried silica aerogels with various preparation conditions using sodium silicate solutions journal May 2008
Polymeric nanoporous materials fabricated with supercritical CO 2 and CO 2 -expanded liquids journal January 2014
Thermal conductivity of IR-opacified silica aerogel powders between 10 K and 275 K journal March 1995
Thermal properties of carbon aerogels journal June 1995
Thermal properties predictive model for insulating foams journal January 2005
Synthesis, Properties, and Applications of Hollow Micro-/Nanostructures journal May 2016
Ultralow density, hollow silica foams produced through interfacial reaction and their exceptional properties for environmental and energy applications journal January 2011
Using nanocapsules as building blocks to fabricate organic polymer nanofoam with ultra low thermal conductivity and high mechanical strength journal November 2012
Determination of mesopore size of aerogels from thermal conductivity measurements journal March 2002
Effect of nano‐titanium nitride on thermal insulating and flame‐retardant performances of phenolic foam journal May 2016
Thermal Conductivity of Monolithic Organic Aerogels journal February 1992
Role of renewable energy sources in environmental protection: A review journal April 2011
Tailoring Mechanical Properties of Aerogels for Aerospace Applications journal March 2011
A Simple Approach in the Synthesis of Geometrically Tunable Nano-size Hollow Silicate Particles and the evaluation for Thermal Energy Saving Applications journal January 2016
Preparation and insulation property studies of thermoplastic PMMA-silica nanocomposite foams journal June 2009
Heat transfer in microcellular polystyrene/multi-walled carbon nanotube nanocomposite foams journal November 2015
Thermal transport in binary colloidal glasses: Composition dependence and percolation assessment journal February 2018
Poly(vinylidene fluoride) foams: a promising low- k dielectric and heat-insulating material journal January 2018
Enhanced mechanical, thermal, and electric properties of graphene aerogels via supercritical ethanol drying and high-temperature thermal reduction journal May 2017
Interface and Morphology Control of the Thermal Conductivity in Core-Shell Particle Colloidal Crystals journal November 2017
Composite thin film of silica hollow spheres and waterborne polyurethane: Excellent thermal insulation and light transmission performances journal April 2012
Thermal properties of organic and inorganic aerogels journal March 1994
The effect of heat-transfer passages on the effective thermal conductivity of high filler loading composite materials journal May 2007
Aerogel based nanoporous fibrous materials for thermal insulation journal July 2014
Polystyrene Foams as Core Materials Used in Vacuum Insulation Panel journal May 2008
The Thermal Conductivity of a Polyethylene Foam Block Produced by a Compression Molding Process journal January 2001
Coherent Expanded Aerogels and Jellies journal May 1931