Thermal insulation characteristics of a lightweight, porous nanomaterial in high-temperature environments

Ren, Haoyuan; Wu, Dafang; Li, Junning; Wu, Wenjun

doi:10.1016/j.matdes.2017.11.059

Cited by 27 publications

(19 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, the development of nanotechnology offers an opportunity to engineer a new generation of porous ceramics with enriched pore hierarchy which can approach the theoretical limits of various properties . Among these nanoscale materials, 1D nanomaterials, such as nanofibers, nanowires, nanotubes, and nanorods, are recognized as a class of most promising materials .…”

Section: Introductionmentioning

confidence: 99%

Three‐dimensional (3D) flexible nanofibrous network knitting on hierarchical porous architecture

et al. 2018

View full text Add to dashboard Cite

Hierarchical structured porous ceramics have attracted tremendous research interests because of their numerous excellent properties including robust mechanical strength and large surface area. In this work, silicon carbide (SiC)-based porous ceramics with three levels of pore hierarchy are fabricated from silicon particlestabilized foams and a subsequent one-step calcination after they were embedded with coke. Three-dimensional (3D) flexible nanofibrous network is adhered and wrapped on cell walls of porous ceramics, which is readily fine-tuned and tailored by the temperature to provide optimized pore structure. The resultant SiC-based porous ceramics present a density of 1.03 g/cm 3 at a porosity of 72% with a large quantity of hierarchical micro-and macropores. This hierarchical structure leads to robust compressive strength (23.52 MPa) and large surface area (64.32 m 2 /g). The fabrication method is straightforward and sought-after, providing a facile technical route for advanced hierarchical porous ceramics used in filtration and catalysis fields.flexible nanofibrous network, hierarchical porous architecture, mechanical properties, particle-stabilized foam, porous ceramics

show abstract

Section: Introductionmentioning

confidence: 99%

Three‐dimensional (3D) flexible nanofibrous network knitting on hierarchical porous architecture

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Nanomaterials are used in a variety of products including paints, filters, insulators, and lubricants; their very small scales impart specific properties, and they have become invaluable tools in materials science [42][43][44][45]. Recently, nanomaterials have been applied in biosensing, bioimaging, tumor diagnosis, and anti-biofouling [46,47].…”

Section: Introductionmentioning

confidence: 99%

Multi-functionalization Strategies Using Nanomaterials: A Review and Case Study in Sensing Applications

Song

Min

Kim

et al. 2021

Int. J. of Precis. Eng. and Manuf.-Green Tech.

View full text Add to dashboard Cite

Remarkable advances in nanomaterials and nanotechnology have led researchers in various fields. The scale effects imparted by nanomaterials are associated with unexpected macroscale phenomena and properties that find many applications. However, multi-functionalization may be accompanied by physical and commercial limitations. Therefore, research must proceed in several different directions. Here, we define multi-functionalization and the electrical applications thereof in terms of increasing performance, addition of new and valuable properties, and multi-physics in play. We deal with sensors, actuators, energy harvesters, and solar cells and explore research that seeks to increase sensitivity, append “stretchability”, and facilitate untethered communication. Furthermore, we analyze research trends in materials use and manufacturing, and highlight useful fabrication methods. With the aim of predicting future research trends, our review presents a roadmap that will aid research on sensing and multi-functional applications.

show abstract

“…Highly porous materials are currently of great interest in thermal insulation applications . According to the study of Spagnol et al, the main contribution to the thermal insulation efficiency of nanomaterials is gas conduction (62%), contrary to solid conduction (24%), and radiation (14%).…”

Section: Introductionmentioning

confidence: 99%

“…Highly porous materials are currently of great interest in thermal insulation applications. [19][20][21][22] According to the study of Spagnol et al, 23 the main contribution to the thermal insulation efficiency of nanomaterials is gas conduction (62%), contrary to solid conduction (24%), and radiation (14%). For heat insulation in air, pores of diameters smaller than the mean free path of the gas molecules lead to the Knudsen effect, 24 which further reduces the thermal conductivity due to pores of very small size.…”

mentioning

confidence: 99%

Polystyrene nanofibers for nonwoven porous building insulation materials

Datsyuk

Trotsenko

Peikert³

et al. 2019

Engineering Reports

View full text Add to dashboard Cite

The building industry makes a great effort to reduce energy consumption. The use of nanotechnology is one of the approaches to surpassing the properties of conventional insulation materials. In this work, an industrial cost‐effective method to manufacture highly porous materials with excellent thermal insulation properties is described. The materials are prepared from polystyrene recovered from the building sector and electrospun as nanofiber‐based sheets. Varying electrospinning parameters allow controlling the morphology of the produced materials. The materials are obtained with differences in interfiber and inner‐fiber porosity and morphology. The thermal conductivity of the freestanding and compressed materials is evaluated. Those differences affect the insulation performance: the materials with higher interfiber porosity show better thermal insulation in the freestanding state. An increase of the inner‐fiber porosity leads to better insulation in the compressed samples. Insertion of carbon nanomaterials reduces the effects of the infrared Radiation. Nanofiber‐based insulation materials from the recycled expanded polystyrene (EPS) show thermal conductivity values of 20 to 25 mW/mK (ie, 20% to 30% below the thermal conductivity of the commercial EPS). The effect of integrating polystyrene nanofiber sheets into conventional wall‐building materials is also investigated in terms of thermal insulation. The nanofiber insulation sheets are sandwiched between two pieces of the building materials resulting in a drastic increase of the insulation effect. The materials have a great potential in using, for example, as thermal insulation for the restoration of historic buildings in the narrow central parts of the old towns.

show abstract

Thermal insulation characteristics of a lightweight, porous nanomaterial in high-temperature environments

Cited by 27 publications

References 13 publications

Three‐dimensional (3D) flexible nanofibrous network knitting on hierarchical porous architecture

Three‐dimensional (3D) flexible nanofibrous network knitting on hierarchical porous architecture

Multi-functionalization Strategies Using Nanomaterials: A Review and Case Study in Sensing Applications

Polystyrene nanofibers for nonwoven porous building insulation materials

Contact Info

Product

Resources

About