Strain Sensitivity of Carbon Nanotubes Modified Cellulose

Toomadj, Farshad; Farjana, Sadia; Sanz‐Velasco, Anke; Naboka, Olga; Lundgren, Per; Rodríguez, Katia; Toríz, Guillermo; Gatenholm, Paul; Enoksson, Peter

doi:10.1016/j.proeng.2011.12.334

Cited by 5 publications

(2 citation statements)

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“…There are different manufacturing methods for the fabrication of CNT-cellulose nanocomposites, but all the methods typically include (1) a phase of dispersing CNTs into a solution, and (2) an impregnation phase into the cellulose substrates (e.g., paper, filter paper) [ 15 , 16 , 20 , 21 , 22 , 23 ]. Alternatively, the dispersion can be used as a wet component with bacterial cellulose [ 24 , 25 ], with cellulose I and regenerated cellulose fibers [ 13 , 18 , 26 ] or in an aerogel form [ 17 ]. The processing of nanocellulose in an aqueous medium is the most common way due to its tendency to react with water, and strong affinity to itself and hydroxyl group containing materials [ 12 ].…”

Section: Introductionmentioning

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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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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Section: Introductionmentioning

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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“…Flexible conductive nanocomposites based on BC modified with double-walled carbon nanotubes (DWCNTs) and MWCNTs was reported by Toomadj et al 44 They prepared nanocomposite by immersing BC pellicles in the different concentration of CNT solutions for 24-72 h followed by washing and drying the samples. In order to study the electromechanical properties of modified nanocellulose composite, constant tensile stress was applied to the samples and the change in resistance was registered by a standard multimeter.…”

Section: Cellulose In Actuator/strain Sensormentioning

confidence: 99%

Cellulosic Nanomaterials for Sensing Applications

Abdi

Abdullah

Tahir

et al. 2014

Materials and Energy

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This chapter provides an overview of recent progress made in the area of cellulosebased nanocomposites for sensing application. Since nanocellulose shows high tensile strength and good water dispersibility and hydrophilic properties, it has been used to improve mechanical and dispersibility properties of the materials. Porous structure of the hydrolyzed polymeric cellulose minimizes barriers to mass transport between the analyte and immobilized indicator decreases the response time. The applications and new advances covered in this chapter are the use of nanocellulose in ion exchange membrane, glucose biosensor, actuators/strain sensor, and heavy metal ion sensor. This chapter will also include the application of cellulose nanocrystals with high surface area and negative charge in biosensor application and separation technologies. The high energy interaction between binding site on the cellulose nanocrystal film and the cationic species combined with the permselective properties make the cellulose film prime candidate for application in sensor devices and permselective membranes. IntroductionRecently, nanocelluloses as a biorenewable and biocompatible resource have received great attention to the scientists due to their unique structural and physical properties such as tensile, optical, and electrical properties. Because of these properties, they have been widely studied for application in materials, actuators/sensors, drug delivery system, and biomedical science. 1 Natural cellulose fibers are bundles of microfibrils which consist of crystalline and amorphous domains. Amorphous regions can be removed by hydrolysis process left behind the crystalline cellulose, which are called nanocrystals. Cellulose nanocrystals (CNCs) are long and straight crystals of cellulose with very large modulus elasticity and strength that can be used as biodegradable additives in nanocomposite materials. 2 Using cellulose nanosized as filler elements instead of other filler materials make the product efficient, biocompatible, cost-effective and, environmental friendly for fabrication of nanocomposite structure. 197Handbook of Green Materials Downloaded from www.worldscientific.com by KAINAN UNIVERSITY on 02/05/15. For personal use only.

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Bacterial Cellulose and its Multifunctional Composites: Synthesis and Properties

Thiruvengadam¹,

Vitta²

2014

Nanocellulose Polymer Nanocomposites

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Strain Sensitivity of Carbon Nanotubes Modified Cellulose

Cited by 5 publications

References 10 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

Cellulosic Nanomaterials for Sensing Applications

Bacterial Cellulose and its Multifunctional Composites: Synthesis and Properties

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