Nanocomposite membranes with high-charge and size-screened phosphorylated nanocellulose fibrils for CO2 separation

Helberg, Ragne Marie Lilleby; Torstensen, Jonathan; Dai, Zhongde; Janakiram, Saravanan; Chinga-Carrasco, Gary; Gregersen, Øyvind Weiby; Syverud, Kristin; Deng, Liyuan

doi:10.1016/j.gee.2020.08.004

Cited by 34 publications

(17 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While none of the materials shows a statistically significant water uptake at 50% RH (i.e., under the conditions at which the mechanical data reported here were measured), they swell rapidly and considerably when the relative humidity is increased to 80 or 90% RH (Figure S6A). In general, the PMETAC/CNC-COONa films show a higher water uptake than the PMETAC/CNC-OH reference materials, on account or the ionic nature of CNC-COONa . Indeed, one intriguing characteristic of PMETAC/CNC-COONa nanocomposites is the ability to redisperse in water upon ultrasonication, as shown in Figure S7 for a 33 wt % PMETAC/CNC-COONa film.…”

Section: Resultsmentioning

confidence: 94%

“…In general, the PMETAC/CNC-COONa films show a higher water uptake than the PMETAC/CNC-OH reference materials, on account or the ionic nature of CNC-COONa. 35 Indeed, one intriguing characteristic of PME-TAC/CNC-COONa nanocomposites is the ability to redisperse in water upon ultrasonication, as shown in Figure S7 for a 33 wt % PMETAC/CNC-COONa film. Due to the hygroscopic nature of PMETAC, the composite films become soft after immersion in the water.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Nanocomposites Assembled via Electrostatic Interactions between Cellulose Nanocrystals and a Cationic Polymer

et al. 2021

View full text Add to dashboard Cite

On account of their high strength and stiffness and their renewable nature, cellulose nanocrystals (CNCs) are widely used as a reinforcing component in polymer nanocomposites. However, CNCs are prone to aggregation and this limits the attainable reinforcement. Here, we show that nanocomposites with a very high CNC content can be prepared by combining the cationic polymer poly[(2-(methacryloyloxy)ethyl) trimethylammonium chloride] (PMETAC) and negatively charged, carboxylated CNCs that are provided as a sodium salt (CNC-COONa). Free-standing films of the composites can be prepared by simple solvent casting from water. The appearance and polarized optical microscopy and electron microscopy images of these films suggest that CNC aggregation is absent, and this is supported by the very pronounced reinforcement observed. The incorporation of 33 wt % CNC-COONa into PMETAC allowed increasing the storage modulus of this already rather stiff, glassy amorphous matrix polymer from 1.5 ± 0.3 to 6.6 ± 0.1 GPa, while the maximum strength increased from 11 to 32 MPa. At this high CNC content, the reinforcement achieved in the PMETAC/CNC-COONa nanocomposite is much more pronounced than that observed for a reference nanocomposite made with unmodified CNCs (CNC-OH).

show abstract

Section: Resultsmentioning

confidence: 94%

Section: ■ Results and Discussionmentioning

confidence: 99%

Nanocomposites Assembled via Electrostatic Interactions between Cellulose Nanocrystals and a Cationic Polymer

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Figure 14 depicts the mechanism of CO2/N2 separation employing PVA/CNC as the active layer. Helberg et al (2021) [47] synthesized highcharge nanocellulose (H-P-CNF) and high-charge nanocellulose with screened size (H-P-CNF-S) and integrated them into a PVA matrix for CO2/N2 separation. The CO2 permeability of the H-P-CNF-S/PVA membrane was 160% higher than that of the neat PVA.…”

Section: Nanocellulose For Gas Separationmentioning

confidence: 99%

“…The hydroxyl group at the sixth position acts as a primary alcohol which is 10 times more reactive than the other hydroxyl groups. The hydroxyl group at the second position is found to be double to that of the third position, of which both serve as secondary alcohols [ 44 , 47 ]. This phenomenon is caused by the steric hindrance of each hydroxyl group, as the hydroxyl group in the sixth position is attached to a carbon atom that is only bonded to one alkyl group, whereas the carbon atom carrying the hydroxyl groups in the second and third positions is bonded to two alkyl groups [ 19 , 48 ].…”

Section: Desirable Features Of Nanocellulose From Membrane Technology...mentioning

confidence: 99%

See 1 more Smart Citation

Recent Development and Environmental Applications of Nanocellulose-Based Membranes

et al. 2022

View full text Add to dashboard Cite

Extensive research and development in the production of nanocellulose production, a green, bio-based, and renewable biomaterial has paved the way for the development of advanced functional materials for a multitude of applications. From a membrane technology perspective, the exceptional mechanical strength, high crystallinity, tunable surface chemistry, and anti-fouling behavior of nanocellulose, manifested from its structural and nanodimensional properties are particularly attractive. Thus, an opportunity has emerged to exploit these features to develop nanocellulose-based membranes for environmental applications. This review provides insights into the prospect of nanocellulose as a matrix or as an additive to enhance membrane performance in water filtration, environmental remediation, and the development of pollutant sensors and energy devices, focusing on the most recent progress from 2017 to 2022. A brief overview of the strategies to tailor the nanocellulose surface chemistry for the effective removal of specific pollutants and nanocellulose-based membrane fabrication approaches are also presented. The major challenges and future directions associated with the environmental applications of nanocellulose-based membranes are put into perspective, with primary emphasis on advanced multifunctional membranes.

show abstract

Fast‐current‐driven synthesis of ultrathin ZIF‐8 membrane on ceramic tube for propene/propane separation

et al. 2022

View full text Add to dashboard Cite

MOF membranes are very promising in molecular separation, but it is still a challenge for industrial applications due to the complex and time-consuming synthesis. We use the fast current-driven synthesis (FCDS) method to achieve controlled growth of ZIF-8 membranes on porous graphite-coated ceramic tubes by controlling the growth time and current density. Grown for 30 min at a current density of 0.74 mA/cm 2 , the

show abstract

Nanocomposite membranes with high-charge and size-screened phosphorylated nanocellulose fibrils for CO2 separation

Cited by 34 publications

References 27 publications

Nanocomposites Assembled via Electrostatic Interactions between Cellulose Nanocrystals and a Cationic Polymer

Nanocomposites Assembled via Electrostatic Interactions between Cellulose Nanocrystals and a Cationic Polymer

Recent Development and Environmental Applications of Nanocellulose-Based Membranes

Fast‐current‐driven synthesis of ultrathin ZIF‐8 membrane on ceramic tube for propene/propane separation

Contact Info

Product

Resources

About