TEMPO-mediated oxidation cellulose pulp modified with Monosodium Glutamate (MSG)

Masruchin, Nanang; Kurniawan, Yudhi Dwi; Kusumah, Sukma Surya; Amanda, Putri; Suryanegara, Lisman; Nuryawan, Arif

doi:10.1088/1755-1315/374/1/012010

Cited by 7 publications

(5 citation statements)

References 21 publications

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“…As a result, the surface of the hydrogel beads displayed a granulated structure (Figure 5(c)). This observation indicated that the pores were now filled with dye, which was in good accordance with the findings reported in the literature for similar works [27,29].…”

Section: Morphology Of Biocomposite Beadssupporting

confidence: 93%

“…Sodium alginate, CaCl2, polyethyleneimine (PEI) with an average MW of ~270.000 and Congo Red were purchased from Sigma Aldrich. The TEMPOoxidized cellulose nanofibrils were prepared according to our previous work [28,29].…”

Section: Methodsmentioning

confidence: 99%

“…The FTIR spectrum of TOCNF, PEI, and TOCNF-PEI are displayed in Figure 2. The carbonyl stretching vibration of TOCNF was displayed by a peak centered at 1,606 cm −1 [29]. The shouldered peak located between 1,600 and 1,800 cm −1 in TOCNF-PEI spectrum seemed to be an overlap of 3 separated peaks, representing N-H bending at 1,615 cm −1 , C=O stretching of -COOand -COOH at 1,660 and 1,710 cm −1 , respectively [26].…”

Section: Preparation Of Hydrogel Beadsmentioning

confidence: 98%

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Adsorption of Congo Red from Aqueous Solutions by Alginate-Nanocellulose-Polyethyleneimine Hydrogel Beads

Amanda,

Kurniawan,

Prasetiyo

et al. 2023

Trends Sci

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Biobased adsorbents have been developed for the removal of dye contaminants in aqueous solution. Hydrogel beads from alginate containing TEMPO-oxidized cellulose nanofibers (TOCNF) grafted with polyethyleneimine (PEI), namely Al/TOCNF-PEI, were prepared and evaluated as a new adsorbent for Congo Red (CR). The Al/TOCNF-PEI hydrogel beads were made with various concentrations of TOCNF/PEI, the optimum concentration is 45 wt% or Al/TOCNF-PEI45. The hydrogel was characterized by using Fourier-Transform Infrared spectroscopy and Scanning Electron Microscopy. The adsorption performance of the Al/TOCNF-PEI hydrogel beads towards CR was investigated in terms of changing of TOCNF-PEI content, initial concentration, pH, contact time, and adsorbent dosage. The maximum capacity of the adsorbent for CR was found to be 9.437 mg/g at the optimal conditions (pH = 3; T = RT) with the removal efficiency reaching 95 %. This result was ascribed to occur due to the electrostatic attraction between the protonated hydroxyl group and ammonium moiety of the hydrogel beads and the anionic sulfonate group of the CR. Upon fitting the adsorption data, the adsorption mechanism was consistent with the Freundlich isotherm and pseudo-second-order kinetic models. Based on this finding, the low-cost Al/TOCNF-PEI45 hydrogel beads demonstrated a great potential for the removal of hazardous dyes in wastewater. HIGHLIGHTS Biocomposites bead of Alginate containing TEMPO-oxidized cellulose nano fibers (TOCNF) grafted with polyethyleneimine (PEI) is promising Biobased adsorbents for removal congo red in aqueous solution. The biocomposite shows strong adsorption due to the electrostatic attraction between the protonated hydroxyl group and ammonium moiety of the hydrogel beads and the anionic sulphonate group of the CR. The high removal percentage was achieved at low starting dye concentration and pH, and high adsorbent doses Freundlich’s isotherm suggests multilayer adsorption of Congo red onto biocomposite beads GRAPHICAL ABSTRACT

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Section: Morphology Of Biocomposite Beadssupporting

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Section: Preparation Of Hydrogel Beadsmentioning

confidence: 98%

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Adsorption of Congo Red from Aqueous Solutions by Alginate-Nanocellulose-Polyethyleneimine Hydrogel Beads

Amanda,

Kurniawan,

Prasetiyo

et al. 2023

Trends Sci

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“…Whereas the thermal degradation of pure cellulose is around 345 • C, for the TEMPOoxidized cellulose and the cellulose nanofiber, it happened at 245 • C. This significant decrease can be due to lower thermal degradation of carboxylate anions (COO-) on the C6 carbon of cellulose chain [34,55]. It can also be claimed that the reduction in cellulose crystallinity, resulting from its oxidation, is another contributing factor to the decrease in degradation temperature, as corroborated by the Crystallinity index (CrI) in the XRD analysis [56].…”

Section: Thermal Properties Of Nanofibers (Tga)mentioning

confidence: 99%

Microwave-Assisted Chemical Purification and Ultrasonication for Extraction of Nano-Fibrillated Cellulose from Potato Peel Waste

Sadeghi-Shapourabadi,

Elkoun,

Robert

2023

Macromol

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Nanofibrillated cellulose was extracted from potato peel waste using a fast and green method with a simple process. To extract cellulose and eliminate non-cellulosic constituents, alkaline and hydrogen peroxide treatments were performed under microwave irradiation. The nanofibrillated cellulose was extracted from purified cellulose via TEMPO oxidation followed by ultrasonication. The TEM, FTIR, XRD, and TGA experiments were used to evaluate the structural, crystalline, and thermal properties of cellulose fiber and nanofiber. The chemical and FTIR analysis of bleached fibers indicates that almost all non-cellulosic components of biomass have been eliminated. The diameter of the extracted nanofibers is in the range of 4 to 22 nm. In terms of crystallinity, extracted nanocellulose had 70% crystallinity, compared to 17% for unprocessed lignocellulose fibers, which makes it an excellent choice for use as a reinforcement phase in biobased composites. Thermogravimetric analysis reveals that cellulose nanofibers are less thermally stable than potato peel pure cellulose, but it has a higher char content (28%) than pure cellulose (6%), which signifies that the carboxylate functionality acts as a flame retardant. The comparison between cellulose derived from microwave and conventional extraction methods confirmed that their impact on the removal of non-cellulosic materials is nearly identical.

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“…Moreover, TOCNF aqueous dispersions can switch reversibly from an elastic-to a viscousdominated regime, a behaviour typical of thixotropic materials (Mendoza et al 2018). Furthermore, the gelation process of TOCNF aqueous dispersions can be improved and tuned by varying different conditions, like pH (Saito et al 2011), temperature, surfactants (Crawford et al 2012;Quennouz et al 2016), and electrolytes (Dong et al 2013;Fukuzumi et al 2014;Masruchin et al 2019;Fiorati et al 2020) concentration. Among all these approaches, the addition of polyvalent electrolytes (e.g.…”

mentioning

confidence: 99%

TEMPO-oxidized cellulose nanofibril/polyvalent cations hydrogels: a multifaceted view of network interactions and inner structure

et al. 2023

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In the last years, hydrogels from renewable biopolymers and low-cost row materials are a hot topic for biomedical applications. In this context, cellulose nanofibrils are considered suitable building blocks for the synthesis of many biocompatible products, with a variety of chemical-physical properties. Herein we report a multi-technique and multi-scale study, from the molecular to the nanometric length scale, of the sol–gel transition observed in aqueous solutions of TEMPO-oxidized nano-sized cellulose fibrils (TOCNFs), when in the presence of polyvalent cations (Mg2+ and Ca2+). We combine the data from Small Angle Neutron Scattering (SANS), which provide information about the inner structure of the nanofibril, with those from UV Resonant Raman (UVRR) spectroscopy, which is a sensitive probe of the intra- and inter-molecular interactions in the gel and the liquid state. The transition between the gel and the liquid phases is investigated as a function of the concentration of both TOCNFs and cations, the nature of the latter, and the pH at which the phenomenon is observed. SANS analysis reveals that ion concentration induces an anisotropic swelling in the nanofibrils which, at the same time, become more and more flexible. The nanofibrils flexibility is also dependent on TOCNF concentration and pH value. UVRR allows us to elucidate the structural organization and hydrogen-bonding properties of water in aqueous TOCNF dispersions and gels, showing how water molecules partially lose their typical bulk-like tetrahedral organization when ions are added, and the gel phase is formed. Graphical abstract

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TEMPO-mediated oxidation cellulose pulp modified with Monosodium Glutamate (MSG)

Cited by 7 publications

References 21 publications

Adsorption of Congo Red from Aqueous Solutions by Alginate-Nanocellulose-Polyethyleneimine Hydrogel Beads

Adsorption of Congo Red from Aqueous Solutions by Alginate-Nanocellulose-Polyethyleneimine Hydrogel Beads

Microwave-Assisted Chemical Purification and Ultrasonication for Extraction of Nano-Fibrillated Cellulose from Potato Peel Waste

TEMPO-oxidized cellulose nanofibril/polyvalent cations hydrogels: a multifaceted view of network interactions and inner structure

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