Wet spun fibers from solutions of cellulose in an ionic liquid with suspended carbon nanoparticles

Härdelin, Linda; Hagström, Bengt

doi:10.1002/app.41417

Cited by 17 publications

(14 citation statements)

References 29 publications

(32 reference statements)

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“…At early stages of the project, carbon filled conductive cellulose fibres and piezoelectric monofilaments were considered as sweat and heart rate sensors in the garment [44,45]. This possibility was, however, postponed for future development, as the necessary technology was not readily available at the time.…”

Section: User Perceptions Of Wearablesmentioning

confidence: 99%

An upper body garment with integrated sensors for people with neurological disorders – early development and evaluation

et al. 2019

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Background: In neurology and rehabilitation the primary interest for using wearables is to supplement traditional patient assessment and monitoring in hospital settings with continuous data collection at home and in community settings. The aim of this project was to develop a novel wearable garment with integrated sensors designed for continuous monitoring of physiological and movement related variables to evaluate progression, tailor treatments and improve diagnosis in epilepsy, Parkinson's disease and stroke. In this paper the early development and evaluation of a prototype designed to monitor movements and heart rate is described. An iterative development process and evaluation of an upper body garment with integrated sensors included: identification of user needs, specification of technical and garment requirements, garment development and production as well as evaluation of garment design, functionality and usability. The project is a multidisciplinary collaboration with experts from medical, engineering, textile, and material science within the wearITmed consortium. The work was organized in regular meetings, task groups and hands-on workshops. User needs were identified using results from a mixedmethods systematic review, a focus group study and expert groups. Usability was evaluated in 19 individuals (13 controls, 6 patients with Parkinson's disease) using semi-structured interviews and qualitative content analysis. Results: The garment was well accepted by the users regarding design and comfort, although the users were cautious about the technology and suggested improvements. All electronic components passed a washability test. The most robust data was obtained from accelerometer and gyroscope sensors while the electrodes for heart rate registration were sensitive to motion artefacts. The algorithm development within the wearITmed consortium has shown promising results.

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Section: User Perceptions Of Wearablesmentioning

confidence: 99%

An upper body garment with integrated sensors for people with neurological disorders – early development and evaluation

et al. 2019

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“…Härdelin and Hagström dispersed carbon black (CB) and graphene nanoplatelets (GNP) in an IL ([Emim]OAc) based cellulose solution using shear mixing and produced carbon filler-loaded cellulose fibers using the wet-spinning method (Härdelin and Hagström 2015). The presence of CB and GNP particles in the spin dope led to the formation of micropores in the fiber.…”

Section: Wet Spinningmentioning

confidence: 99%

Cellulose-based fiber spinning processes using ionic liquids

et al. 2022

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Cellulose, a natural, renewable, and environment friendly biopolymer, has been considered as a sustainable feedstock in the near future. However, only 0.3% of cellulose is today processed since it is not soluble in conventional solvents due to the strong hydrogen bonding network and highly ordered structure. Hence, the search of effective and eco-friendly solvents for cellulose dissolution has been a key pillar for decades. In the recent years, ionic liquids (ILs) have been proposed as green solvents for cellulose and have been applied for the production of cellulose-based fibers. This review aims to focus the attention toward fiber spinning methods of cellulose based on ILs, as well as recent progress in cellulose dissolution using ILs. Moreover, the development of cellulosic fibers blended with other biopolymers, and cellulose composites are presented. Finally, different applications of cellulose fibers and composites are summarized and discussed.

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“…Then the electrical conductivity γ (S/m) of the fiber was acquired from the reciprocal of the resistivity, i.e., γ = L/(R × A). 32,33 Tensile Strength. The mechanical properties of the MWCNTs-rGOs-cellulose fibers were measured by a Dynamic Mechanical Analyzer (DMA Q800) at 30 °C with a rate force and upper force limit of 0.05 N/min and 18 N, respectively.…”

Section: ■ Introductionmentioning

confidence: 99%

Preparation of MWCNTs-Graphene-Cellulose Fiber with Ionic Liquids

Liu

Wang

Nie

et al. 2019

ACS Sustainable Chem. Eng.

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The conductive multiwalled carbon nanotubes (MWCNTs)-graphene sheets (rGOs)-cellulose fiber was prepared with an eco-friendly wet-spinning method in which ionic liquid (IL) was used as both green solvent and dispersant. It was found that the selected IL 1-ethyl-3methylimidazolium diethyl phosphate (EmimDep) shows remarkable capacities for dissolving cellulose and dispersing MWCNTs, and the synergistic effect of MWCNTs, rGOs, and cellulose results in a high electrical conductivity of 1195 S/m of MWCNTs-rGOs-cellulose fibers. Macropores and the double-layer structure of MWCNTs and rGOs can be observed by SEM in the studied fibers, and the number of macropores decreased with increasing rGOs amount, which is consistent with the result of the specific surface area. In addition, the prepared MWCNTs-rGOs-cellulose fibers present a nearly perfect electrical double-layer structure. The MWCNTs-rGOs-cellulose fiber with a mass ratio of 2:3:1 shows the best performance as the electrode candidate, with an electrical conductivity of 1195 S/m, specific capacitance of 597 mF/cm 2 , and specific surface area of 91 m 2 /g. Furthermore, the results from the molecular dynamics (MD) simulation evidenced that EmimDep can disperse CNTs effectively at 363.15 K, 1 atm compared to rGOs; the synergy effect of CNT and rGO exhibit great potential to enhance the dispersion than each individual component.

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Wet spun fibers from solutions of cellulose in an ionic liquid with suspended carbon nanoparticles

Cited by 17 publications

References 29 publications

An upper body garment with integrated sensors for people with neurological disorders – early development and evaluation

An upper body garment with integrated sensors for people with neurological disorders – early development and evaluation

Cellulose-based fiber spinning processes using ionic liquids

Preparation of MWCNTs-Graphene-Cellulose Fiber with Ionic Liquids

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