Helical polysilane wrapping onto carbon nanotube: preparation, characterization and infrared emissivity property study

Zhang, Muyang; Zhou, Yuming; He, Min; Zhang, Tao; Bu, Xiaohai

doi:10.1039/c5ra24052b

Cited by 9 publications

(3 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There already exists interaction between polymer chains and CNTs in the solution or melt before polymer crystallization, and some polymer chains may be adsorbed on the surface of CNTs, driven by noncovalent π–π, CH-π, van der Waals interactions, etc. − It is reported in literature that polymer chains may interact with CNTs in two modes: coaxial interaction ,, or helical wrapping. − These two interaction modes have also been confirmed by molecular dynamic simulations, respectively. − When polymer chains are coaxially attached to the CNT surface and align along the axis of CNT, maximal interaction between polymer chains and CNT can be achieved. However, the gauche conformers in the polymer chains must be transformed into trans ones in such an interaction mode, which will lead to a loss in conformational entropy .…”

Section: Resultsmentioning

confidence: 83%

Straight and Rod-like Core–Sheath Crystals of Solution-Crystallized Poly(ε-caprolactone)/Multiwalled Carbon Nanotube Nanocomposites

Zhou

Fan

et al. 2016

Crystal Growth & Design

View full text Add to dashboard Cite

The crystal morphology of poly(ε-caprolactone)/multiwalled carbon nanotube (PCL/MWCNT) blends and MWCNT-g-PCL grafting polymers crystallized in n-hexanol was investigated. Two typical morphologies are observed: a straight and rod-like core–sheath structure with embedded MWCNTs as the core and PCL polycrystals of high crystallinity as the sheath, and a bent double-layer structure with MWCNTs covered by a PCL layer of low crystallinity. It is found that thinner (outer diameter <15 nm) and shorter (length <2 μm) MWCNTs are easier to be straightened by PCL crystals, and the grafted PCL chains have weaker crystallizability due to structural confinement and thus a weaker ability of straightening MWCNTs. Electron diffraction and high-resolution transmission electron microscopy reveal that the PCL crystals are randomly orientated with the b-axis perpendicular to the MWCNT surface. The growth direction of the PCL crystals is not perpendicular to the axis of MWCNT, possibly due to the nucleation effect of the preadsorbed PCL chains in the solution, which helically wrap MWCNTs. This leads to wrapping and straightening of MWCNTs by rigid PCL crystals.

show abstract

Section: Resultsmentioning

confidence: 83%

Straight and Rod-like Core–Sheath Crystals of Solution-Crystallized Poly(ε-caprolactone)/Multiwalled Carbon Nanotube Nanocomposites

Zhou

Fan

et al. 2016

Crystal Growth & Design

View full text Add to dashboard Cite

show abstract

“…Helical polysilanes are now being used in other research areas. For example, recently, helical polysilanes that were wrapped onto carbon nanotubes via surface oxidation resulted in low infrared emissivity of the composite material generated . Promising results were also observed when the conditions were optimized to efficiently generate circularly polarized light using aggregates of helical polysilane suspended in optofluids …”

Section: Helical Polysilanesmentioning

confidence: 99%

Properties and applications of polysilanes

Kumar

Leitao

2020

Applied Organom Chemis

View full text Add to dashboard Cite

show abstract

“…Multicomponent synergistic effects have been widely recognized to work on the infrared emissivity reduction of nanocomposites. [ 14,17 ] To overcome these drawbacks of conventional fillers, it is highly important to explore new possible low infrared emissivity materials toward potential large‐scale application.…”

Section: Introductionmentioning

confidence: 99%

Combined Experimental and DFT Study on 2D MoSe₂ toward Low Infrared Emissivity

Tong

Zhou

et al. 2022

Adv Funct Materials

View full text Add to dashboard Cite

Low infrared emissivity materials play a key role in thermal camouflage or retardation. Among these, fillers can be easily shaped into various flexible forms and normally provide an omnidirectional and polarization-insensitive emissivity. However, conventional fillers suffer from drawbacks of full-waveband ultrahigh reflectivity, unsatisfactory thermal camouflage performances, or poor chemical/thermal stabilities. Herein, 2D MoSe 2 is discovered as a new semiconductor with intrinsic low infrared emissivity after first-principle density functional theory calculation and experimental demonstration on eight types of two-dimensional materials (2DMs). Mechanisms of electron-photon reflection and phonon-photon absorption for the low infrared emissivity are proposed. A two-step microwave-assisted amination process is developed to exfoliate the nanosheets and obtain a desired low infrared emissivity. The as-obtained chitosan modified MoSe 2 (CS@MoSe 2 ) has an ultrahigh spectral reflectivity of 78%-86% in 8-14 µm, and its resin-based coating still exhibits a low infrared emissivity of 0.32 and shows a dramatic reduction in radiation temperature of 28 °C for a hot object at 70 °C. Besides, CS@MoSe 2 can endure a high temperature of 220 °C and is demonstrated with a long-term thermal camouflage efficiency in hot environments. This work will guide 2DMs selection and preparation toward desired infrared radiation properties to satisfy numerous applications.

show abstract

Helical polysilane wrapping onto carbon nanotube: preparation, characterization and infrared emissivity property study

Abstract: Morphological, structural and infrared emissivity properties of HPS/f-MWNTs complexes prepared by the solution blending method were investigated.

Cited by 9 publications

References 31 publications

Straight and Rod-like Core–Sheath Crystals of Solution-Crystallized Poly(ε-caprolactone)/Multiwalled Carbon Nanotube Nanocomposites

Straight and Rod-like Core–Sheath Crystals of Solution-Crystallized Poly(ε-caprolactone)/Multiwalled Carbon Nanotube Nanocomposites

Properties and applications of polysilanes

Combined Experimental and DFT Study on 2D MoSe₂ toward Low Infrared Emissivity

Contact Info

Product

Resources

About

Helical polysilane wrapping onto carbon nanotube: preparation, characterization and infrared emissivity property study

Abstract: Morphological, structural and infrared emissivity properties of HPS/f-MWNTs complexes prepared by the solution blending method were investigated.

Cited by 9 publications

References 31 publications

Straight and Rod-like Core–Sheath Crystals of Solution-Crystallized Poly(ε-caprolactone)/Multiwalled Carbon Nanotube Nanocomposites

Straight and Rod-like Core–Sheath Crystals of Solution-Crystallized Poly(ε-caprolactone)/Multiwalled Carbon Nanotube Nanocomposites

Properties and applications of polysilanes

Combined Experimental and DFT Study on 2D MoSe2 toward Low Infrared Emissivity

Contact Info

Product

Resources

About

Combined Experimental and DFT Study on 2D MoSe₂ toward Low Infrared Emissivity