High-performance carbon nanofiber coated cellulose filter paper for electromagnetic interference shielding

Mondal, Subhadip; Ganguly, Sayan; Das, Poushali; Bhawal, Poushali; Das, Tushar Kanti; Nayak, Lalatendu; Khastgir, Dipak; Das, Narayan Ch.

doi:10.1007/s10570-017-1441-4

Cited by 72 publications

(32 citation statements)

References 68 publications

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“…% MWCNT. Mondal et al [ 59 ] reported conductivity values after using a dipping method, and they reached 0.85 S/cm with a 12.8 wt. % carbon nanofiber (CNF) content.…”

Section: Resultsmentioning

confidence: 99%

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Effect of Surfactant Type and Sonication Energy on the Electrical Conductivity Properties of Nanocellulose-CNT Nanocomposite Films

Siljander

Keinänen

Räty

et al. 2018

IJMS

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We present a detailed study on the influence of sonication energy and surfactant type on the electrical conductivity of nanocellulose-carbon nanotube (NFC-CNT) nanocomposite films. The study was made using a minimum amount of processing steps, chemicals and materials, to optimize the conductivity properties of free-standing flexible nanocomposite films. In general, the NFC-CNT film preparation process is sensitive concerning the dispersing phase of CNTs into a solution with NFC. In our study, we used sonication to carry out the dispersing phase of processing in the presence of surfactant. In the final phase, the films were prepared from the dispersion using centrifugal cast molding. The solid films were analyzed regarding their electrical conductivity using a four-probe measuring technique. We also characterized how conductivity properties were enhanced when surfactant was removed from nanocomposite films; to our knowledge this has not been reported previously. The results of our study indicated that the optimization of the surfactant type clearly affected the formation of freestanding films. The effect of sonication energy was significant in terms of conductivity. Using a relatively low 16 wt. % concentration of multiwall carbon nanotubes we achieved the highest conductivity value of 8.4 S/cm for nanocellulose-CNT films ever published in the current literature. This was achieved by optimizing the surfactant type and sonication energy per dry mass. Additionally, to further increase the conductivity, we defined a preparation step to remove the used surfactant from the final nanocomposite structure.

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“…% MWCNT. Mondal et al [ 59 ] reported conductivity values after using a dipping method, and they reached 0.85 S/cm with a 12.8 wt. % carbon nanofiber (CNF) content.…”

Section: Resultsmentioning

confidence: 99%

“… Comparison of obtained electrical conductivity of NFC-CNT nanocomposite films from the current literature. Pink star (letter k) refers to our data (Triton X-100), while other letters refer to a [ 9 ], b [ 56 ], c [ 57 ], d [ 58 ], e [ 22 ], f [ 9 ], g [ 24 ], h [ 57 ], i [ 59 ], j [ 15 ], l [ 32 ] and m [ 27 ]. …”

Section: Figurementioning

confidence: 99%

Effect of Surfactant Type and Sonication Energy on the Electrical Conductivity Properties of Nanocellulose-CNT Nanocomposite Films

Siljander

Keinänen

Räty

et al. 2018

IJMS

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“…It was a kind of physical interaction between CNTs and GNPs, which was formed by Van der Waals forces. Besides, when the contact length and orientations were appropriate, there emerged π-π interaction between CNTs and GNPs, leading to a closer bond [20,21,44,45]. The large surface of the GNPs provided sufficient adsorption space for the CNTs to got sound dispersion.…”

Section: Morphologymentioning

confidence: 99%

Calculations of factors that affect thermal conductivity in epoxy composites with hybrid carbon nanotube and graphene nano platelet

Wang

Xiao

Fan

et al. 2020

Mater. Res. Express

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Carbon Nanotubes (CNTs) and Graphene Nano Platelets (GNPs) had been used to enhance the thermal conductivity of the epoxy composites and show a synergistic effect. Complex service conditions also put forward the requirements for the structural design of the composites to get better performance. Researches should be done to further understand the mechanism of enhancement in composites and find ways to assist the design and optimization of the structure. In this research, epoxy composites with CNTs, GNPs and hybrid CNTs-GNPs (5:2) were prepared, whose total content of fillers was kept constant at 0.4 vol%. Test of specific surface area shew the hybrid fillers had less aggregation and the composites with hybrid fillers had the highest thermal conductivity. Observing the microstructure of the composites, CNTs were absorbed on the surface of GNPs, forming a crossnetwork which could improve aggregation and provide channels for the heat. A series of finite element models were established using scripts to find the factors that affect the forming of network and heat flow. A parameter was created to reflect the distribution of the fillers: distance of non-network(DNN). Positions, orientations, ratios, shapes, and sizes are all factors. The effect of angles depends on the relative positions of the fillers. A proper bending degree of CNTs would have better enhancement. The vertical-structure network was created manually and heat flux on the network was shown: GNPs expanded the area of network for the acceptance and release of heat. CNTs provide efficient channels for the multidirectional heat flow. The combination of the geometry expanded the influence region of the network.

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“…16 Smooth CNF films have also potential as substrate for printing conductive structures and transistors. [24][25][26][27][28][29][30][31] Especially, in the context of today's massive boom of wireless sensor systems for pervasive monitoring of parameters in virtually all areas of human society, the importance of an environmentally sustainable model of production of electronic components and whole systems is becoming increasingly important. Importantly, when compared to plastic foil, conventionally used for sensor fabrication, CNF films are renewable and biodegradable in nature.…”

Section: Introductionmentioning

confidence: 99%

Wide range humidity sensors printed on biocomposite films of cellulose nanofibril and poly(ethylene glycol)

Syrový

Maronová

Kuberský

et al. 2019

J of Applied Polymer Sci

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Cellulose nanofibril (CNF) films were prepared from side streams generated by the sugarcane industry, that is, bagasse. Two fractionation processes were utilized for comparison purposes: (1) soda and (2) hot water and soda pretreatments. 2,2,6,6-Tetramethylpiperidinyl-1-oxyl-mediated oxidation was applied to facilitate the nanofibrillation of the bagasse fibers. Poly(ethylene glycol) (PEG) was chosen as plasticizer to improve the ductility of CNF films. The neat CNF and biocomposite films (CNF and 40% PEG) were used for fabrication of self-standing humidity sensors. CNF-based humidity sensors exhibited high change of impedance, within four orders of magnitude, in response to relative humidity (RH) from 20 to 90%. The use of plasticizer had an impact on sensor kinetics. While the biocomposite film sensors showed slightly longer response time, the recovery time of these plasticized sensors was two times shorter in comparison to sensors without PEG. This study demonstrated that agroindustrial side streams can form the basis for high-end applications such as humidity sensors, with potential for, for example, packaging and wound dressing applications.

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High-performance carbon nanofiber coated cellulose filter paper for electromagnetic interference shielding

Cited by 72 publications

References 68 publications

Effect of Surfactant Type and Sonication Energy on the Electrical Conductivity Properties of Nanocellulose-CNT Nanocomposite Films

Effect of Surfactant Type and Sonication Energy on the Electrical Conductivity Properties of Nanocellulose-CNT Nanocomposite Films

Calculations of factors that affect thermal conductivity in epoxy composites with hybrid carbon nanotube and graphene nano platelet

Wide range humidity sensors printed on biocomposite films of cellulose nanofibril and poly(ethylene glycol)

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