Multi-Functional Properties of MWCNT/PVA Buckypapers Fabricated by Vacuum Filtration Combined with Hot Press: Thermal, Electrical and Electromagnetic Shielding

Abstract

The applications of pure multi-walled carbon nanotubes (MWCNTs) buckypapers are still limited due to their unavoidable micro/nano-sized pores structures. In this work, polyvinyl alcohol (PVA) was added to a uniform MWCNTs suspension to form MWCNT/PVA buckypapers by vacuum infiltration combined with a hot press method. The results showed an improvement in the thermal, electrical, and electromagnetic interference (EMI) shielding properties due to the formation of dense MWCNTs networks. The thermal and electrical properties rose from 1.394 W/m·k to 2.473 W/m·k and 463.5 S/m to 714.3 S/m, respectively. The EMI performance reached 27.08 dB. On the other hand, ABAQUS finite element software was used to simulate the coupled temperature-displacement performance. The electronic component module with buckypapers revealed a homogeneous temperature and thermal stress distribution. In sum, the proposed method looks promising for the easy preparation of multi-functional nanocomposites at low-cost.

Flexible Poly(vinylidene fluoride)-MXene/Silver Nanowire Electromagnetic Shielding Films with Joule Heating Performance

“…17−19 For example, Cao et al fabricated carbon nanotubes (CNTs)/poly(vinyl alcohol) (PVA) shielding buckypaper by a vacuum filtration hot press method. 20 The flexible buckypaper exhibited an average effectiveness of 27.08 dB at a CNT content of 83.3 wt %. Wan et al developed a specific EMI SE of 29 141 dB/(cm 2 g) for a MXene/bacterial cellulose (BC) composite film with a MXene mass fraction of 76.9 wt % by an in situ biosynthesis technique.…”

“…So far, compounding polymer matrices with high-conductivity fillers, such as graphene, carbon nanotubes (CNTs), MXene, , and nanowires to prepare conductive polymer composites (CPCs) have been exploited extensively to supplement or substitute inflexible and high-density metal shields. − For example, Cao et al fabricated carbon nanotubes (CNTs)/poly­(vinyl alcohol) (PVA) shielding buckypaper by a vacuum filtration hot press method . The flexible buckypaper exhibited an average effectiveness of 27.08 dB at a CNT content of 83.3 wt %.…”

High performance of the flow-type one-compartment hydrogen peroxide fuel cell using buckypaper and narrow fuel pathway under physiological conditions

“…This phenomenon can be explained by the interstitial pore feature coming from the intrinsic reticulate CNT network of BP, which contributes to improving the mass transfer of the substrates to the inner electrode and binds the hemin molecules tightly. 43,44 The second significant difference between CNT/PEI/hemin and BP/PEI/hemin is their HPOR behaviors. As shown in Fig.…”

SCOBY-based bacterial cellulose as free standing electrodes for safer, greener and cleaner energy storage technology

“…CNT has been blended with various polymers e.g. CNT-polyimide [ 24 ], CNT-polyvinylidene difluoride (PVdF) [ 25 ], CNT-polyvinyl alcohol (PVA) [ 26 ], CNT-polyethylene oxide (PEO) [ 27 ], CNT-polylactic acid (PLA) [ 28 ] and many more in various applications and industries. The used of CNT as the addictive is due to their excellent electrical conductivity, nucleating effect on graphitization at a low temperature and chemical stability.…”