Cationic functionalization of cellulose monoliths using a urea-choline based deep eutectic solvent and their applications

Yang, Zhaohang; Asoh, Taka‐Aki; Uyama, Hiroshi

doi:10.1016/j.polymdegradstab.2018.12.015

Cited by 24 publications

(13 citation statements)

References 34 publications

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“…Over 32 billion kilograms of high volume, low value and underutilized lignocellulosic biomaterial are produced from agricultural by-products annually, creating significant disposal problems [ 27 ]. In terms of pretreatment methods, deep eutectic solvents (DES) have been heralded as the most promising environmentally benign solvents to replace volatile organic solvents due to their almost null toxicity and total biodegradability [ 28 ]. DES are a fluid obtained by simply mixing two or three cheap and safe components with lower melting point than any of the original components [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

Cationic Lignocellulose Nanofibers from Agricultural Waste as High-Performing Adsorbents for the Removal of Dissolved and Colloidal Substances

et al. 2022

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The accumulation of dissolved and colloidal substances (DCS) in the increasingly closed paper circulating water system can seriously lower the productivity and safety of papermaking machines, and it has been a challenge to develop an adsorbent with low cost, high adsorption efficiency and large adsorption capacity for DCS removal. In this study, cationic lignocellulose nanofibers (CLCNF) were obtained by cationic modification of agricultural waste bagasse in deep eutectic solvents (DES) followed by mechanical defibrillation, and then CLCNF were employed as an adsorbent for DCS model contaminant polygalacturonic acid (PGA) removal. CLCNF was characterized by transmission electron microscopy, Fourier transform infrared, elemental analysis, X-ray diffraction, and thermogravimetric analysis. The analytical results confirmed the successful preparation of CLCNF with 4.6–7.9 nm diameters and 0.97–1.76 mmol/g quaternary ammonium groups. The effects of quaternary ammonium group contents, pH, contact time and initial concentration of PGA on the adsorption were investigated in a batch adsorption study. According to the results, the cationic modification significantly enhanced the adsorption of PGA by CLCNF and the adsorption performance increased with the increase of the quaternary ammonium group contents. The adsorption of PGA on CLCNF followed the pseudo-second-order and the fitted Langmuir isotherm model. The adsorption showed fast initial kinetics and the experimental maximum adsorption capacity was 1054 mg/g, which is much higher than PGA adsorbents previously reported in the literature. Therefore, CLCNF with high cationic group content developed in this paper is a promising adsorbent for DCS removal.

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Section: Introductionmentioning

confidence: 99%

Cationic Lignocellulose Nanofibers from Agricultural Waste as High-Performing Adsorbents for the Removal of Dissolved and Colloidal Substances

et al. 2022

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“…These attractive features make cellulose-based membranes a potential candidate for biomedical applications [13][14][15][16][17][18]. Various methods, including freeze-drying and thermally induced phase separation (TIPS), have been developed for fabricating cellulose-based porous membranes, especially cellulose monoliths [13,15,19]. The controllable and reproducible porous monoliths have been recognized as important materials for biomedical applications because their function depends on their pore and skeletal structures [20].…”

Section: Introductionmentioning

confidence: 99%

“…The controllable and reproducible porous monoliths have been recognized as important materials for biomedical applications because their function depends on their pore and skeletal structures [20]. Therefore, the TIPS method has been generally utilized to fabricate cellulose monoliths due to its excellent versatility, simplicity, and controllability in determining morphology and pore structure, and is based on thermodynamically induced phase separation of polymer-rich and polymer-lean phases [15,19].…”

Section: Introductionmentioning

confidence: 99%

Photodynamic Activity of Protoporphyrin IX-Immobilized Cellulose Monolith for Nerve Tissue Regeneration

Lee

Kim

Kwon

et al. 2022

IJMS

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The development of nerve conduits with a three-dimensional porous structure has attracted great attention as they closely mimic the major features of the natural extracellular matrix of the nerve tissue. As low levels of reactive oxygen species (ROS) function as signaling molecules to promote cell proliferation and growth, this study aimed to fabricate protoporphyrin IX (PpIX)-immobilized cellulose (CEPP) monoliths as a means to both guide and stimulate nerve regeneration. CEPP monoliths can be fabricated via a simple thermally induced phase separation method and surface modification. The improved nerve tissue regeneration of CEPP monoliths was achieved by the activation of mitogen-activated protein kinases, such as extracellular signal-regulated kinases (ERKs). The resulting CEPP monoliths exhibited interconnected microporous structures and uniform morphology. The results of in vitro bioactivity assays demonstrated that the CEPP monoliths with under 0.54 ± 0.07 μmol/g PpIX exhibited enhanced photodynamic activity on Schwann cells via the generation of low levels of ROS. This photodynamic activation of the CEPP monoliths is a cell-safe process to stimulate cell proliferation without cytotoxic side effects. In addition, the protein expression of phospho-ERK increased considerably after the laser irradiation on the CEPP monoliths with low content of PpIX. Therefore, the CEPP monoliths have a potential application in nerve tissue regeneration as new nerve conduits.

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“…Recently, DES has been applied for organic synthesis, catalysis, material chemistry, and electrochemistry [24]. Lately, studies on the use of DES in cellulose functionalization (e.g., cationic functionalization, phosphine functionalization, and carbamate functionalization) and the preparation of various types of nanocellulose have emerged [25][26][27]. Sulfamic acid (amidosulfonic acid) is an inorganic solid acid formed by treating urea with a mixture of sulfur trioxide and sulfuric acid.…”

Section: Introductionmentioning

confidence: 99%

Facile Preparation and Characteristic Analysis of Sulfated Cellulose Nanofibril via the Pretreatment of Sulfamic Acid-Glycerol Based Deep Eutectic Solvents

Xue

et al. 2021

Nanomaterials

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A deep eutectic solvent (DES) composed of sulfamic acid and glycerol allowed for the sustainable preparation of cellulose nanofibrils (CNF) with simultaneous sulfation. The reaction time and the levels of sulfamic acid demonstrated that fibers could be swelled and sulfated simultaneously by a sulfamic acid-glycerol-based DES and swelling also promoted sulfation with a high degree of substitution (0.12). The DES-pretreated fibers were further nanofibrillated by a grinder producing CNF with diameters from 10 nm to 25 nm. The crystallinity ranged from 53–62%, and CNF maintained the original crystal structure. DES pretreatment facilitated cellulose nano-fibrillation and reduced the energy consumption with a maximum reduction of 35%. The films prepared from polyvinyl alcohol (PVA) and CNF showed good UV resistance ability and mechanical properties. This facile and efficient method provided a more sustainable strategy for the swelling, functionalization and nano-fibrillation of cellulose, expanding its application to UV-blocking materials and related fields.

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Cationic functionalization of cellulose monoliths using a urea-choline based deep eutectic solvent and their applications

Cited by 24 publications

References 34 publications

Cationic Lignocellulose Nanofibers from Agricultural Waste as High-Performing Adsorbents for the Removal of Dissolved and Colloidal Substances

Cationic Lignocellulose Nanofibers from Agricultural Waste as High-Performing Adsorbents for the Removal of Dissolved and Colloidal Substances

Photodynamic Activity of Protoporphyrin IX-Immobilized Cellulose Monolith for Nerve Tissue Regeneration

Facile Preparation and Characteristic Analysis of Sulfated Cellulose Nanofibril via the Pretreatment of Sulfamic Acid-Glycerol Based Deep Eutectic Solvents

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