Oxidized cellulose—Survey of the most recent achievements

Coseri, Sergiu; Biliuță, Gabriela; Simionescu, Bogdan C.; Stana‐Kleinschek, Karin; Ribitsch, Volker; Harabagiu, Valeria

doi:10.1016/j.carbpol.2012.03.086

Cited by 155 publications

(72 citation statements)

References 51 publications

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“…The chemical structure of cellulose is changed in a way that hydroxyl groups are oxidized into the corresponding aldehyde structure, i.e., an aldehyde, a ketone, or a carboxyl moiety. Periodates, as specific oxidants, oxidize the vicinal hydroxyl groups at C-2 and C-3 in an anhydroglucose unit (AGU) of cellulose, thereby forming two aldehyde groups (Coseri et al 2013), as depicted in Fig. 1.…”

Section: Periodate Oxidation Of Bamboo Pulp Fibersmentioning

confidence: 99%

Preparation and Characterization of Aldehyde-Functionalized Cellulosic Fibers through Periodate Oxidization of Bamboo Pulp

Wei¹,

Du²,

Liu³

et al. 2016

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a Cellulosic fibers were efficiently disintegrated from bamboo pulp as raw material and then oxidized using sodium periodate to introduce dialdehyde groups on their surfaces. The resultant fibers were characterized using Fourier transform infrared spectroscopy (FT-IR), Xray diffraction (XRD), and thermogravimetric analysis (TGA). FT-IR spectra demonstrated that the characteristic absorption band of aldehyde groups was present at 1735 cm -1 , confirming that aldehyde groups were successfully introduced. XRD showed that the nature of bamboo pulp fibers changed slightly after oxidation, except in the reduction of crystallinity. The aldehyde content increased with the sodium periodate content and reached a maximum of 1.41 mmol/g. The yield loss maximum was 32.4 wt%. TGA results showed that the temperature at the initial and final decomposition of the oxidized fibers was subject to the periodate dosage and that the thermal stability decreased to some extent.

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Section: Periodate Oxidation Of Bamboo Pulp Fibersmentioning

confidence: 99%

Preparation and Characterization of Aldehyde-Functionalized Cellulosic Fibers through Periodate Oxidization of Bamboo Pulp

Wei¹,

Du²,

Liu³

et al. 2016

BioResources

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“…The surface modification of cellulose fibers by selectively converting primary hydroxyl groups to the corresponding carboxylic functions, maintaining the original backbone of the polysaccharide, is of major interest for different applications [46–47]. …”

Section: Reviewmentioning

confidence: 99%

Metal-free aerobic oxidations mediated by N-hydroxyphthalimide. A concise review

Melone¹,

Punta²

2013

Beilstein J. Org. Chem.

151

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SummarySince the beginning of the century, N-hydroxyphthalimide and related compounds have been revealed to be efficient organocatalysts for free-radical processes and have found ample application in promoting the aerobic oxidation of a wide range of organic substrates. When combined with different co-catalysts, they are activated to the corresponding N-oxyl radical species and become able to promote radical chains, involving molecular oxygen, directly or indirectly. Most of the examples reported in the literature describe the use of these N-hydroxy derivatives in the presence of transition-metal complexes. However, eco-friendly standards, including the demand for highly selective transformations, impose the development of metal-free processes, especially for large-scale productions, as in the case of the oxygenation of hydrocarbons. For this reason, many efforts have been devoted in the past decade to the design of new protocols for the activation of N-hydroxy imides in the presence of nonmetal initiators. Herein we provide a concise overview of the most significant and successful examples in this field, with the final aim to furnish a useful instrument for all scientists actively involved in the O2-mediated selective oxidation of organic compounds and looking for environmentally safe alternatives to metal catalysis.

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“…[20][21][22][23][24] Herein, the preoxidation method was proposed to enhance the reactivity of cellulose. The hydroxymethyl groups are converted to carboxyl groups which act as catalytic active sites for both cellulose depolymerization during pretreatment and the subsequent hydrolysis of cellulose to glucose.…”

Section: Introductionmentioning

confidence: 99%