Anisotropic electrical and thermal characteristics of carbon nanotube-embedded wood

Kim, Do Hyun; Na, In Yeob; Jang, Hae‐Dong; Kim, Hong Dae; Kim, Gyu Tae

doi:10.1007/s10570-019-02485-y

Cited by 14 publications

(9 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This was followed up with further Raman spectroscopic analysis of elastic wood@CNT. It is well known that the Raman spectra of CNT exhibit a G-band associated with tangential vibrational modes around 1582 cm −1 , while the D-band around 1350 cm −1 originates from disorder or defects [ 45 ]. Based on this, the loading of MWCNT can be confirmed by examining the G-band of the Raman spectra measured from each sample.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Properties Study of Wood-Based Cushioning Materials

Pei

Gou

et al. 2023

Polymers

View full text Add to dashboard Cite

Traditional cushioning package materials, such as Expended Polystyrene (EPS) and Expanded Polyethylene (EPE), were made with petroleum-based plastics, which are harmful to the environment. It is crucial to develop renewable bio-based cushioning materials that can replace the aforementioned foams due to the rising energy demands of human society and the depletion of fossil fuels. Herein, we report an effective strategy for creating anisotropic elastic wood with special spring-like lamellar structures. Selective removal of lignin and hemicellulose by simple chemical treatment and thermal treatment of the samples after freeze-drying results in an elastic material with good mechanical properties. The resulting elastic wood has a reversible compression rate of 60% and a high elastic recovery (99% height retention after 100 cycles at 60% strain). Drop tests revealed that the elastic wood has excellent cushioning properties. In addition, the chemical and thermal treatments also enlarge the pores in the material, which is favorable for subsequent functionalization. By loading the elastic wood with a muti-walled carbon nanotube (MWCNT), electromagnetic shielding properties are achieved, while the mechanical properties of elastic wood remain unchanged. Electromagnetic shielding materials can effectively suppress various electromagnetic waves propagating through space and the resulting electromagnetic interference and electromagnetic radiation, improve the electromagnetic compatibility of electronic systems and electronic equipment, and ensure the safety of information.

show abstract

Section: Resultsmentioning

confidence: 99%

Preparation and Properties Study of Wood-Based Cushioning Materials

Pei

Gou

et al. 2023

Polymers

View full text Add to dashboard Cite

show abstract

“…The difference can be interpreted by a grain boundary effect formed by fibers of wood. [26] Electrons flowing to perpendicular to wood grain direction pass through the geometrical grain boundary, resulting in longer transmission distance and narrower conductive paths for electrons.…”

Section: Resultsmentioning

confidence: 99%

Anisotropic MXene@Wood Composites for Tunable Electromagnetic Interference Shielding

Wei

Dai

Zhang

et al. 2022

Preprint

View full text Add to dashboard Cite

To comply with the increasingly complex and changeful application environment, realizing effective shielding effectiveness (SE) adjustment is the trend of next-generation electromagnetic interference (EMI) shielding materials. Herein, we utilize the natural wood as substrate, and MXene sheets are coated to the wood surface to develop anisotropic MXene@wood (M@W) composites with outstanding EMI shielding performance. The M@W displays apparent different properties between cross section and tangential section, in terms of pore structure, dielectric properties, polarization relaxation, impedance matching condition, and EMI SE. In the tangential section, the angle between wood grain and the electric field direction of incident electromagnetic wave governs the shielding performance. The EMI SE ranges from 57.6 dB to 27.4 dB when the angle changes from 0° (parallel to grain of wood) to 90° (perpendicular to grain of wood). This finding provides invaluable guidance for the design of anisotropic materials with convenient EMI shielding performance regulation.

show abstract

“…2 Wood substrates were treated with multiwalled carbon nanotubes as a conductive material for smallscale applications. 14,15 A novel multifunctional particleboard was developed with a mixture of graphene oxide, phosphoric acid, and melamine as conductive components, which applied as a coating on the surface of the particleboard. 16 Impregnation of the wood structure with salt-based protective agents, intrinsically conductive polymers, and low-melting metals has also been attempted to improve the electrical conductivity of wood products.…”

Section: Introductionmentioning

confidence: 99%

“…Wood substrates were treated with multiwalled carbon nanotubes as a conductive material for small‐scale applications 14,15 . A novel multifunctional particleboard was developed with a mixture of graphene oxide, phosphoric acid, and melamine as conductive components, which applied as a coating on the surface of the particleboard 16 .…”

Section: Introductionmentioning

confidence: 99%

Development of electrically conductive wood‐based composites using carbon nets

Rezanezhad,

Shalbafan,

Thoemen

2023

Polymer Composites

View full text Add to dashboard Cite

A novel conductive composite material was developed using woven carbon nets. For this purpose, carbon nets with different mesh sizes of 25, 100, 225, and 400 mm2 were woven, using two different carbon yarns with widths of 2 and 0.5 mm. The woven carbon nets were used before and after the core layer formation during mat forming of the particleboard. It was found that the insertion of carbon nets into the panel structure not only transforms insulated particleboard into a highly conductive composite but also significantly improves the flexural properties of the composite. However, the internal bond strength and physical properties of the composites were negatively affected by the presence of carbon nets in the panel structure, although their values were still above the minimum requirements of the standard values. Increasing the mesh area of the carbon nets and using thinner carbon yarns to weave the nets had a negative effect on the electrical and mechanical properties of the composites. In addition, a demonstration object was made of conductive composites to integrate lighting and a smartphone charging port into the object and prove the applicability of the developed composites for the furniture industry.Highlights Composites with carbon nets with smaller mesh area showed higher conductivity. The smaller the width of the carbon yarn, the higher the electrical resistance. The carbon net in the composites led to a decrease in internal bond strength. The carbon nets improved the flexural properties of the composites. Thickness swelling was significantly reduced by the use of carbon nets.

show abstract

Anisotropic electrical and thermal characteristics of carbon nanotube-embedded wood

Cited by 14 publications

References 22 publications

Preparation and Properties Study of Wood-Based Cushioning Materials

Preparation and Properties Study of Wood-Based Cushioning Materials

Anisotropic MXene@Wood Composites for Tunable Electromagnetic Interference Shielding

Development of electrically conductive wood‐based composites using carbon nets

Contact Info

Product

Resources

About