Oxone®-Mediated TEMPO-Oxidized Cellulose Nanomaterials form I and form II

Moore, John P.; Dachavaram, Soma Shekar; Bommagani, Shobanbabu; Penthala, Narsimha Reddy; Venkatraman, Priya; Foster, E. Johan; Crooks, Peter A.; Hestekin, Jamie A.

doi:10.3390/molecules25081847

Cited by 3 publications

(6 citation statements)

References 36 publications

(61 reference statements)

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“…A reduction in peaks at 896 cm −1 and 986 cm −1 was observed for paper produced from TMF. Notably, TEMPO-oxidized cellulose is distinguished from other samples by the shift and merging of stretching at 1598 cm −1 , owing to the presence of the C=O moiety of carboxylate groups on fibrils [37][38][39]. The carboxylate band in the spectrum of 100% TMF sheets masked the OH bending of adsorbed water at 1635-1638 cm −1 [40].…”

Section: Resultsmentioning

confidence: 99%

Effects of Modified Cellulose Fiber and Nanofibril Integration on Basic and Thermo-Mechanical Properties of Paper

Teke,

Atik,

Bertoncelj

et al. 2023

Forests

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This study investigates the influence of fiber modification methods and beating degrees on the properties of paper sheets. Two different methods were used to modify fibers: NaOH + urea and TEMPO ((2,2,6,6-tetramethylpiperidin-1-yl)oxidanyl) and blended with traditional paper fibers. Subsequently, we evaluated the resulting sheets for their optical, strength, and thermo-mechanical characteristics. Notably, we also scrutinized sheets created exclusively with 100% TEMPO-modified fibers. The addition of modified fibers led to improvements in several strength properties, but it had a noteworthy negative impact on the optical properties of TEMPO-treated fibers compared to the other papers. Furthermore, thermal analysis revealed that the contraction rates of the samples increased considerably up to 40–50 °C for the out-of-plane direction and surpassed 130 °C for the in-plane direction. In general, the inclusion of modified fibers had a significant effect on thermo-mechanical properties. Specifically, TEMPO modification resulted in an increase in the maximum in-plane contraction ratio, shifting it from −0.40% to −0.59%, along with its corresponding temperature. This research underscores the potential of modified fibers to enhance paper properties and contribute to the development of more sustainable paper-based products.

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Section: Resultsmentioning

confidence: 99%

Effects of Modified Cellulose Fiber and Nanofibril Integration on Basic and Thermo-Mechanical Properties of Paper

Teke,

Atik,

Bertoncelj

et al. 2023

Forests

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“…Utilizing the procedure from Moore et al, OTO-CNMs Form I and Form II were synthesized and used in conjunction with cellulose triacetate (CTA) from Acros Organics (Fair Lawn, NJ, USA), N-methyl pyrrolidone (NMP) from VWR (Radnor, PA, USA), and deionized water to create novel membranes for filtration [21]. The proteins used for ultrafiltration and dialysis characterization were bovine serum albumin (BSA), lysozyme, and urea supplied from VWR.…”

Section: Methodsmentioning

confidence: 99%

“…Form I is partially oxidized, and Form II is fully oxidized. They were both found to have a novel crystalline structure [21]. Neither Form I or Form II has been tested within polymer-based filtration studies.…”

Section: Introductionmentioning

confidence: 99%

Oxone®-Mediated TEMPO-Oxidized Cellulose Nanomaterial Ultrafiltration and Dialysis Mixed-Matrix Hollow Fiber Membranes

et al. 2020

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Recent exploration of cellulose nanomaterials has resulted in the creation of Oxone®-Mediated TEMPO-Oxidized Cellulose Nanomaterials (OTO-CNMs). These materials, when incorporated into a polymer matrix, have properties showing increased flux, decreased membrane resistance, and improved clearance, making them an ideal material for dialysis. This study is the first to focus on the implementation of OTO-CNMs into hollow fiber membranes and a comparison of these membranes for ultrafiltration and dialysis. Ultrafiltration and dialysis were performed using bovine serum albumin (BSA), lysozyme, and urea to analyze various properties of each hollow fiber membrane type. The results presented in this study provide the first quantitative evaluation of the clearance and sieving characteristics of Oxone®-Mediated TEMPO-Oxidized Cellulose-Nanomaterial-doped cellulose triacetate mixed-matrix hemodialyzers. While the cellulose nanomaterials increased flux (10–30%) in ultrafiltration mode, this was offset by increased removal of albumin. However, in dialysis mode, these materials drastically increased the mass transfer of components (50–100%), which could lead to significantly lower dialysis times for patients. This change in the performance between the two different modes is most likely due to the increased porosity of the cellulose nanomaterials.

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“…TEMPO oxidized cellulose contains carboxylate groups which make the material more hydrophilic, thereby improving solubility. The TEMPO oxidation process has been explored previously [25][26][27][28] . Although TEMPO oxidized cellulose produces materials that are present in crystalline nanofibrils that form larger fibrous structures in the native form, modifying these biopolymers via dissolution and precipitation is possible 29 .…”

mentioning

confidence: 99%

“…Although TEMPO oxidized cellulose produces materials that are present in crystalline nanofibrils that form larger fibrous structures in the native form, modifying these biopolymers via dissolution and precipitation is possible 29 . TEMPO oxidized cellulose has also been used to modify ultrafiltration membranes 28,30 .…”

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confidence: 99%

High flux novel polymeric membrane for renal applications

Hestekin,

Pakkaner,

Hestekin

et al. 2023

Sci Rep

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Biocompatibility and the ability to mediate the appropriate flux of ions, urea, and uremic toxins between blood and dialysate components are key parameters for membranes used in dialysis. Oxone-mediated TEMPO-oxidized cellulose nanomaterials have been demonstrated to be excellent additives in the production and tunability of ultrafiltration and dialysis membranes. In the present study, nanocellulose ionic liquid membranes (NC-ILMs) were tested in vitro and ex vivo. An increase in flux of up to two orders of magnitude was observed with increased rejection (about 99.6%) of key proteins compared to that of polysulfone (PSf) and other commercial membranes. NC-ILMs have a sharper molecular weight cut-off than other phase inversion polymeric membranes, allowing for high throughput of urea and a uremic toxin surrogate and limited passage of proteins in dialysis applications. Superior anti-fouling properties were also observed for the NC-ILMs, including a > 5-h operation time with no systemic anticoagulation in blood samples. Finally, NC-ILMs were found to be biocompatible in rat ultrafiltration and dialysis experiments, indicating their potential clinical utility in dialysis and other blood filtration applications. These superior properties may allow for a new class of membranes for use in a wide variety of industrial applications, including the treatment of patients suffering from renal disease.

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Oxone®-Mediated TEMPO-Oxidized Cellulose Nanomaterials form I and form II

Cited by 3 publications

References 36 publications

Effects of Modified Cellulose Fiber and Nanofibril Integration on Basic and Thermo-Mechanical Properties of Paper

Effects of Modified Cellulose Fiber and Nanofibril Integration on Basic and Thermo-Mechanical Properties of Paper

Oxone®-Mediated TEMPO-Oxidized Cellulose Nanomaterial Ultrafiltration and Dialysis Mixed-Matrix Hollow Fiber Membranes

High flux novel polymeric membrane for renal applications

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