High aspect ratio cellulose nanofibrils from macroalgae Laminaria hyperborea cellulose extract via a zero-waste low energy process

Onyianta, Amaka J.; O’Rourke, Dominic; Sun, Dongyang; Popescu, Carmen Mihaela; Dorris, Mark

doi:10.1007/s10570-020-03223-5

Cited by 30 publications

(8 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The GP corresponds to the lowest concentration at which the fibres form a continuous network (i.e. point of network formation) (Onyianta et al 2020). However, this method is dependent on the ability of the fibres to form sediments, which requires the fibres to be large enough to settle (Tanaka et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Rapid cellulose nanomaterial characterisation by rheology

et al. 2023

View full text Add to dashboard Cite

Cellulose nanomaterial (CNM) aspect ratio strongly influences sheet formation and resulting mechanical, optical, and barrier properties. However, there is a lack of fast and reliable methods for CNM aspect ratio determination, limiting the reliable production of nanocellulose at industrial-scale. Current laboratory approaches comprise microscopic (e.g. atomic force microscopy (AFM) and transmission electron microscopy (TEM)), and sedimentation methods, which are time-consuming and limited to specific CNM fibre sizes. Here, we describe a new rheological method to determine the aspect ratios for the whole size range of cellulose fibres using rheology. Cellulose nanocrystals (CNCs), cellulose nanofibres (CNFs), and wood fibres in the form of Bleached Eucalyptus Kraft (BEK) were investigated. The aspect ratios of these three scales of cellulose fibres were determined by measuring the specific viscosity profiles of their suspensions at different concentrations from high to low shear rates (2000–0.001 s−1), and evaluating whether the fibre suspensions exhibited entangled or disentangled behaviour. The rheological results agreed well with those produced by AFM and sedimentation methods. Furthermore, cellulose fibre aspect ratios determined with specific viscosity measurements were generated in 5 hours for each feedstock, while sedimentation and AFM required at least 2 days to produce the same results. Ultimately, we demonstrate that rheology is a rapid and accurate method to determine the aspect ratio for the whole range of cellulose fibre sizes, a critical step towards facilitating their full-scale application.

show abstract

Section: Introductionmentioning

confidence: 99%

Rapid cellulose nanomaterial characterisation by rheology

et al. 2023

View full text Add to dashboard Cite

show abstract

“…First, freeze‐dried CNCs were obtained from Laminaria hyperborea seaweed cellulose via an acid‐hydrolysis approach. [ 44,86 ] In a typical synthesis procedure, 5.12 g of PEI (ULTEM 1000) was dissolved in 20 mL of 1‐methyl‐2‐pyrrolidone (NMP) by magnetic stirring at room temperature for 12 h, followed by dispersing 5 wt% of CNCs (based on the weight of PEI) in the above mixture under tip sonication at 15% to obtain a homogenous solution. Then, the resulting spinning solution was pumped at a flow rate of 1.0 mL h −1 through a stainless‐steel syringe needle connected to a high‐voltage power supply carrying a DC voltage of 20 kV.…”

Section: Methodsmentioning

confidence: 99%

“…[ 42,43 ] Notably, when the CNCs are extracted from the waste cellulose fraction of alginate production from brown seaweed, that otherwise would have gone into landfills, it exemplifies a circular and sustainable system of turning a ubiquitous biomass or waste into high‐value products. [ 44 ]…”

Section: Introductionmentioning

confidence: 99%

Stable Sodium‐Metal Batteries in Carbonate Electrolytes Achieved by Bifunctional, Sustainable Separators with Tailored Alignment

Wang

Zhang

et al. 2022

Advanced Materials

Self Cite

View full text Add to dashboard Cite

Sodium (Na) is the most appealing alternative to lithium as an anode material for cost‐effective, high‐energy‐density energy‐storage systems by virtue of its high theoretical capacity and abundance as a resource. However, the uncontrolled growth of Na dendrites and the limited cell cycle life impede the large‐scale practical implementation of Na‐metal batteries (SMBs) in commonly used and low‐cost carbonate electrolytes. Herein, the employment of a novel bifunctional electrospun nanofibrous separator comprising well‐ordered, uniaxially aligned arrays, and abundant sodiophilic functional groups is presented for SMBs. By tailoring the alignment degree, this unique separator integrates with the merits of serving as highly aligned ion‐redistributors to self‐orientate/homogenize the flux of Na‐ions from a chemical molecule level and physically suppressing Na dendrite puncture at a mechanical structure level. Remarkably, unprecedented long‐term cycling performances at high current densities (≥1000 h at 1 and 3 mA cm−2, ≥700 h at 5 mA cm−2) of symmetric cells are achieved in additive‐free carbonate electrolytes. Moreover, the corresponding sodium–organic battery demonstrates a high energy density and prolonged cyclability over 1000 cycles. This work opens up a new and facile avenue for the development of stable, low‐cost, and safe‐credible SMBs, which could be readily extended to other alkali‐metal batteries.

show abstract

“…Due to the shortage of nonrenewable resources and deterioration of the environment intensify, the importance of cellulose-based materials has increased in recent years (Onyianta et al 2020;You et al 2022). Cellulose is a renewable and abundant natural polymeric material that can be obtained from cotton, wood, bamboo, hemp, bagasse, straw and many other materials (Tajima et al 2022;Ono et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Hydrophobic and mechanical strength enhancement of hemp fabric and paper enabled by waterborne polyurethane-derived functional coating

Zhao

Sui

Zhang

et al. 2023

Preprint

View full text Add to dashboard Cite

Cellulosic-based materials such as hemp fabric and paper have combined characteristics of renewability, biodegradability, flexibility, and recyclability. However, regular products are not suitable for use in unconventional applications due to inherent limitations, and accordingly, enabling new capabilities is a necessity. To this end, the conversion of regular hemp fabric and paper into high-strength product with hydrophobic function via surface engineering was explored. The fluorinated waterborne polyurethane (FWPU) emulsions were first synthesized as functional coatings by in-situ polymerization. The structure and properties of the FWPU emulsion and film were characterized by FTIR, XRD, SEM TG, XPS. The results showed that the grafting of perfluorooctanol imparts WPU film excellent hydrophobicity, the water contact angle increases from 71.2º to 105.95º. After the FWPU coating, the water contact angle of the hemp fabric and paper increases from 0º to 117.10º and 112.77°, respectively. Quite encouragingly, the coating generation of waterborne polyurethane-derived functional additives led to the increase of mechanical strength by more than x and x times, in the case of qualitative filter paper and hemp fabric. Overall, this functionalized waterborne polyurethane coating would direct paper and hemp fabric toward diversified applications.

show abstract

High aspect ratio cellulose nanofibrils from macroalgae Laminaria hyperborea cellulose extract via a zero-waste low energy process

Cited by 30 publications

References 39 publications

Rapid cellulose nanomaterial characterisation by rheology

Rapid cellulose nanomaterial characterisation by rheology

Stable Sodium‐Metal Batteries in Carbonate Electrolytes Achieved by Bifunctional, Sustainable Separators with Tailored Alignment

Hydrophobic and mechanical strength enhancement of hemp fabric and paper enabled by waterborne polyurethane-derived functional coating

Contact Info

Product

Resources

About