Tuning the linear actuation of multiwall carbon nanotube fibers with carbide-derived carbon

Sustainability of Multiwall Carbon Nanotube Fibers and Their Cellulose Composite

“…With increasing frequency (Figure S3a,b), the stress and strain increased to 0.05 Hz and decreased slightly at 0.1 Hz for the CNT fiber. A similar phenomenon is observed by taking the strain and stress of the CNT fiber against Recent research shows that the CNT fiber stress and strain profile (Figure 4a,b) revealed mixed actuation with expansion at negative and positive charging [20]. Mixed actuation properties are not ideal in linear actuators, as the overall stress and strain is reduced, as shown with a stress difference of 0.52 kPa and a strain of 0.01%.…”

“…The strain and stress results against applied frequencies are presented in Figure S3a,b. Recent research shows that the CNT fiber stress and strain profile (Figure 4a,b) revealed mixed actuation with expansion at negative and positive charging [20]. Mixed actuation properties are not ideal in linear actuators, as the overall stress and strain is reduced, as shown with a stress difference of 0.52 kPa and a strain of 0.01%.…”

“…Other paths to combining cellulose with electroactive materials involve using the coating technology of electroactive polymer (EAP), either on cellulose paper [16,17] or cellulose fibers [18], or dipping technology [19]. Multifunctional MWCNT (CNT) can also be made in fiber material using dielectrophoresis (DEP) techniques [20] with high tensile strength. The CNTs are kept together over van der Waals forces, and the porosity/density of those fibers can be controlled over the applied electric field [21].…”

“…The CNTs are kept together over van der Waals forces, and the porosity/density of those fibers can be controlled over the applied electric field [21]. Research has been made using such CNT fiber in linear actuation properties, revealing relatively weak stress and strain [20,22]. Other research using DEP-formed CNT fibers allows the alignment of the CNT to obtain higher tensile strength [23] with various applications in sensors [24] as well as supercapacitors [25].…”

“…The performance of such actuator material should be comparable to that of the pristine CNT fiber. Therefore, our goal in this work is to compare CNT fibers made by dielectrophoresis [20] and Cell-CNT composite fibers made over extrusion. The linear actuation properties and the specific capacitance are compared.…”