Stability and aging of solubilized dialdehyde cellulose

Münster, Lukáš; Vı́cha, Jan; Klofáč, Jiří; Masař, Milan; Kucharczyk, Pavel; Kuřitka, Ivo

doi:10.1007/s10570-017-1314-x

Cited by 64 publications

(78 citation statements)

References 30 publications

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“…In addition to the above-described intramolecular interactions comprising the potential structural moieties shown in Figure 1 , the formation of intermolecular hemiacetal cross-links is likely for cellulose samples of high carbonyl content exceeding 60–80 mmol kg –1 as proposed by Potthast et al 33 and Morooka et al 34 The existence of both intra- and intermolecular hemiacetal moieties in aqueous solutions of 2,3-dialdehyde cellulose has been recently confirmed by NMR studies. 8 …”

Section: Resultsmentioning

confidence: 99%

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Transparent, Flexible, and Strong 2,3-Dialdehyde Cellulose Films with High Oxygen Barrier Properties

et al. 2018

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2,3-Dialdehyde cellulose (DAC) of a high degree of oxidation (92% relative to AGU units) prepared by oxidation of microcrystalline cellulose with sodium periodate (48 °C, 19 h) is soluble in hot water. Solution casting, slow air drying, hot pressing, and reinforcement by cellulose nanocrystals afforded films (∼100 μm thickness) that feature intriguing properties: they have very smooth surfaces (SEM), are highly flexible, and have good light transmittance for both the visible and near-infrared range (89–91%), high tensile strength (81–122 MPa), and modulus of elasticity (3.4–4.0 GPa) depending on hydration state and respective water content. The extraordinarily low oxygen permeation of <0.005 cm3 μm m–2 day–1 kPa–1 (50% RH) and <0.03 cm3 μm m–2 day–1 kPa–1 (80% RH) can be regarded as a particularly interesting feature of DAC films. The unusually high initial contact angle of about 67° revealed a rather low hydrophilicity compared to other oxidatively modified or unmodified cellulosic materials which is most likely the result of inter- and intramolecular hemiacetal and hemialdal formation during drying and pressing.

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Section: Resultsmentioning

confidence: 99%

“…These results are in good agreement with a previous study of the stability and aging of solubilized dialdehyde cellulose of high degree of oxidation which confirmed the prevalent (intramolecular) hemiacetal structure of DAC in solution and the maintained functionality of the masked aldehyde moiety. 8 …”

Section: Resultsmentioning

confidence: 99%

Transparent, Flexible, and Strong 2,3-Dialdehyde Cellulose Films with High Oxygen Barrier Properties

et al. 2018

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“…The analyses were conducted in duplicate. The aldehyde content is then determined according to Equation

true normalA normall normald normale normalh normaly normald normale normalc normalo normaln normalt normale normaln normalt ((), m, m, o, l) = M_{normalN normala normalO normalH} \times (() V_{normalc} - V_{normalb})

…”

Section: Methodsmentioning

confidence: 99%

“…The analyses were conducted in duplicate. The aldehyde content is then determined according to Equation (2) [4,12] Aldehyde content mmol…”

Section: Aldehyde Content Determination By Oxime Titrationmentioning

confidence: 99%

“…Amongt hese derivatives," dialdehyde cellulose" (DAC) is of growingi mportance.T he chemical structure of DAC gives the materialahigh functionality,w hich provides many possibilities for follow-up chemistry.D AC is obtained by selective oxidation of cellulose repeating units by periodate ions, which cause cleavage of the C2ÀC3 bondsa nd the formation of aldehyde groups at these positions. [1][2][3] The dialdehyde groups form reversibly intra-and intermolecular hemiacetal and hemialdal bonds,a sw ell as hydrates, [4] and are thereby "masked". In contrast to native cellulose, DAC is soluble in hot water, [5] at least at degrees of oxidation above approximately 60 %.…”

Section: Introductionmentioning

confidence: 99%

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Resource‐Saving Production of Dialdehyde Cellulose: Optimization of the Process at High Pulp Consistency

et al. 2019

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Oxidation of cellulose with periodate under aqueous conditions yields dialdehyde cellulose, a promising functional cellulose derivative. The main obstacles for this oxidation have been its slow kinetics and the dilute reaction conditions, requiring considerable amounts of water and energy. In this study, these drawbacks are overcome by conducting the oxidation at high cellulosic pulp consistency with a cellulose/water weight ratio of 1:4. The oxidizer, cellulose, and water are efficiently mixed in a ball mill. Oxidation occurs mostly in the subsequent step, during the resting time (no further milling/mixing is required). The reaction and resource efficiency of the process are optimized by experimental design and a maximum aldehyde content of 8 mmol g−1 is obtained with a periodate/cellulose molar ratio of 1.25, a milling time of 2 min, and a resting time of 8 h. The developed method allows fine tuning of the oxidation level and is a key step towards the sustainable periodate oxidation of cellulose also on larger scale.

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Preparation and characterization of cellulose nanocrystals from spent edible fungus substrate

Yang

Liu

et al. 2021

J Sci Food Agric

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BACKGROUND Spent edible fungus substrates were identified as potential sources to produce cellulose derivatives, namely purified cellulose and dicarboxyl cellulose nanocrystal (DCNC). Purified celluloses were obtained via chemical treatments and then oxidized by sequential periodate‐chlorite without mechanical process. The structural properties of the DCNCs were characterized by transmission electron microscopy (TEM), Fourier‐transform infrared (FTIR) spectroscopy, X‐ray diffraction (XRD) and thermal gravimetric analysis (TGA). RESULTS XRD results showed that the cellulose I structure was maintained, however, the crystallinity index decreased after oxidation process. The initial pyrolysis temperature of DCNCs ranged from 242 to 344 °C. TEM results revealed that DCNC was rod‐shaped with an average length and width of 130.88 nm and 7.3 nm, respectively. The average specific surface area (SSA) was 366.67 m2 g–1. The carboxyl content was around 3.485 mmol g–1. Finally, the adsorption capacity for contaminations was 76.98, 126.22, 64.44 and 9.63 mg g–1 for copper ion (Cu2+), lead ion (Pb2+), chromium (Cr3+) and amoxicillin (AMX), respectively. CONCLUSION This work showed a sequentially chemical oxidation for preparing nanocellulose from secondary agricultural waste with many functional applications. © 2021 Society of Chemical Industry.

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Stability and aging of solubilized dialdehyde cellulose

Cited by 64 publications

References 30 publications

Transparent, Flexible, and Strong 2,3-Dialdehyde Cellulose Films with High Oxygen Barrier Properties

Transparent, Flexible, and Strong 2,3-Dialdehyde Cellulose Films with High Oxygen Barrier Properties

Resource‐Saving Production of Dialdehyde Cellulose: Optimization of the Process at High Pulp Consistency

Preparation and characterization of cellulose nanocrystals from spent edible fungus substrate

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