Tailor-made hemicellulose-based hydrogels reinforced with nanofibrillated cellulose

Dax, Daniel; Honorato, Camila; Liu, Jun; Xu, Chunlin; Willför, Stefan; Bastidas, M. S.Chávez; Sánchez, Julio; Spoljaric, Steven; Seppälä, Jukka; Mendonça, Regis Teixeira

doi:10.3183/npprj-2015-30-03-p373-384

Cited by 14 publications

(10 citation statements)

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“…The tendency of cellulose to stick together is not confined to the dried state. Both CNCs and CNFs form various types of gels, but in contrast to the rod‐like CNCs, CNFs require very low concentrations (ca. 0.5–1.0 wt%) because of the high number of the interfibrillar junctions enabled by the flexible fibrillary structure.…”

Section: Nanocelluloses As Colloidal‐level Structural Unitsmentioning

confidence: 99%

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Advanced Materials through Assembly of Nanocelluloses

et al. 2018

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There is an emerging quest for lightweight materials with excellent mechanical properties and economic production, while still being sustainable and functionalizable. They could form the basis of the future bioeconomy for energy and material efficiency. Cellulose has long been recognized as an abundant polymer. Modified celluloses were, in fact, among the first polymers used in technical applications; however, they were later replaced by petroleum-based synthetic polymers. Currently, there is a resurgence of interest to utilize renewable resources, where cellulose is foreseen to make again a major impact, this time in the development of advanced materials. This is because of its availability and properties, as well as economic and sustainable production. Among cellulose-based structures, cellulose nanofibrils and nanocrystals display nanoscale lateral dimensions and lengths ranging from nanometers to micrometers. Their excellent mechanical properties are, in part, due to their crystalline assembly via hydrogen bonds. Owing to their abundant surface hydroxyl groups, they can be easily modified with nanoparticles, (bio)polymers, inorganics, or nanocarbons to form functional fibers, films, bulk matter, and porous aerogels and foams. Here, some of the recent progress in the development of advanced materials within this rapidly growing field is reviewed.

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Section: Nanocelluloses As Colloidal‐level Structural Unitsmentioning

confidence: 99%

“…Nanocelluloses have been used to create a wealth of hydrogel types . The simplest case is offered by pristine CNFs, which spontaneously form hydrogels, probably promoted by their length and interacting entanglements.…”

Section: Functional Materials Based On Nanocellulosesmentioning

confidence: 99%

Advanced Materials through Assembly of Nanocelluloses

et al. 2018

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“…Concurrently, it was observed that the concentration of dissolved dye in the solution increased, which could be due to the low stability of hydrogel. In general, it is observed that hydrogels absorb the contaminant until a plateau of stability or equilibrium is attained in the adsorption curve, which is maintained until the hydrogel reaches its maximum swelling capacity, whereupon the sample sorption starts decreasing [ 30 ]. In the case of the hydrogel with CNF, Hy01, a slower response to adsorption is observed, but this response is sustained when nearing 300 min with 76.41 mg of MO per gram of resin.…”

Section: Resultsmentioning

confidence: 99%

“…CNF was obtained by oxidation with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) [ 29 ]. The synthesis was performed using a cellulose sample from Norweigan spruce wood, according to the procedure described by Dax et al [ 30 ]. The suspension used in this study had a concentration of 10.79 mg g −1 .…”

Section: Methodsmentioning

confidence: 99%

Hydrogels Based on Poly([2-(acryloxy)ethyl] Trimethylammonium Chloride) and Nanocellulose Applied to Remove Methyl Orange Dye from Water

et al. 2021

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Bio-based hydrogels that adsorb contaminant dyes, such as methyl orange (MO), were synthesized and characterized in this study. The synthesis of poly([2-(acryloyloxy)ethyl] trimethylammonium chloride) and poly(ClAETA) hydrogels containing cellulose nanofibrillated (CNF) was carried out by free-radical polymerization based on a factorial experimental design. The hydrogels were characterized by Fourier transformed infrared spectroscopy, scanning electron microscopy, and thermogravimetry. Adsorption studies of MO were performed, varying time, pH, CNF concentration, initial dye concentration and reuse cycles, determining that when the hydrogels were reinforced with CNF, the dye removal values reached approximately 96%, and that the material was stable when the maximum swelling capacity was attained. The maximum amount of MO retained per gram of hydrogel (q = mg MO g−1) was 1379.0 mg g−1 for the hydrogel containing 1% (w w−1) CNF. Furthermore, it was found that the absorption capacity of MO dye can be improved when the medium pH tends to be neutral (pH = 7.64). The obtained hydrogels can be applicable for the treatment of water containing anionic dyes.

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“…Adsorbents made of microcrystalline cellulose and CNC removed up to 95% of methylene blue from aqueous media . Polysaccharide based networks reinforced with cellulose nanofibrils (CNF) displayed excellent capacity to remove chromate ions from aqueous media …”

Section: Introductionmentioning

confidence: 99%

Cellulose Based Cryogels as Adsorbents for Organic Pollutants

Toledo

Martins

Pirich

et al. 2019

Macromolecular Symposia

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Cryogels of hydroxypropyl methylcellulose (HPMC) and bacterial cellulose nanocrystals (CNC) were prepared with 0, 5, or 15 wt% contents of CNC. Two types of CNC were used, namely, CNC‐SO4 and CNC, with ζ‐potential values of − (46 ± 1) mV and − (5 ± 1) mV, respectively. Regardless the CNC type or content, all cryogels presented similar density, capillarity constant, contact angle, swelling rate values, and morphology. However, the addition of only 5% of CNC‐SO4 to HPMC cryogels increased the compressive modulus from (120 ± 15) kPa to (150 ± 19) kPa. The cryogels were tested as adsorbents for 17α‐ethinyl estradiol (EE) and methylene blue (MB). In the dilute range, the pollutants removal efficiency of reinforced cryogels was considerably larger than that of neat cryogels. In the more concentrated range, all adsorbents presented similar efficiency. The adsorption isotherms of EE and MB onto cryogels fitted with sigmoidal and Freundlich adsorption models, indicating higher affinity for aerogels with 5% CNC‐SO4. Cryogels could be recycled 10 and 5 times, respectively, for MB and EE adsorption/desorption under flow without losing efficiency, disclosing their potential for preconcentration of pollutants, and environmental remediation.

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Tailor-made hemicellulose-based hydrogels reinforced with nanofibrillated cellulose

Cited by 14 publications

References 0 publications

Advanced Materials through Assembly of Nanocelluloses

Advanced Materials through Assembly of Nanocelluloses

Hydrogels Based on Poly([2-(acryloxy)ethyl] Trimethylammonium Chloride) and Nanocellulose Applied to Remove Methyl Orange Dye from Water

Cellulose Based Cryogels as Adsorbents for Organic Pollutants

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