Influence of different oxidizing systems on cellulose oxidation level: introduced groups versus degradation model

Toshikj, Emilija; Tarbuk, Anita; Grgić, Katia; Mangovska, Biljana; Jordanov, Igor

doi:10.1007/s10570-018-2133-4

Cited by 37 publications

(12 citation statements)

References 43 publications

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“…[12] Sodium periodate can selectively oxidize vicinal hydroxy groups (À OH) of cellulose at C2 and C3 positions to aldehyde groups (À CHO), and simultaneously break the corresponding CÀ C bond of the glucopyranose ring, whereas the hydrogen bonding within the lignocellulose was disrupted. [28] The highly reactive aldehyde groups (À CHO) were easily transferred to the stable carboxyl groups (À COOH) by NaClO 2 and H 2 O 2 mixed solution, which is confirmed by the emergence of a new peak of carboxyl groups (in sodium salt form) at around 1640 cm À 1 in SCCF-10's FTIR spectrum (Figure 2a). [29] Furthermore, the peak of SCCF-10 between 173-178 ppm in the 13 C NMR spectrum can be attributed to À COOH, whereas there is no peak in this range for natural bamboo particles and oxidized bamboo particles, confirming the partial conversion of À OH to À COOH (Figure S2).…”

Section: Resultsmentioning

confidence: 78%

“…In the bamboo particles, lignin and hemicellulose act as fillers and binders that wrap the cellulose microfibrils together to form cell walls in which cellulose microfibrils form a highly aligned arrangement at the nanoscale [12] . Sodium periodate can selectively oxidize vicinal hydroxy groups (−OH) of cellulose at C2 and C3 positions to aldehyde groups (−CHO), and simultaneously break the corresponding C−C bond of the glucopyranose ring, whereas the hydrogen bonding within the lignocellulose was disrupted [28] . The highly reactive aldehyde groups (−CHO) were easily transferred to the stable carboxyl groups (−COOH) by NaClO 2 and H 2 O 2 mixed solution, which is confirmed by the emergence of a new peak of carboxyl groups (in sodium salt form) at around 1640 cm −1 in SCCF‐10’s FTIR spectrum (Figure 2a).…”

Section: Resultsmentioning

confidence: 99%

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Constructing An All‐Natural Bulk Structural Material from Surface‐Charged Bamboo Cellulose Fibers with Enhanced Mechanical and Thermal Properties

et al. 2023

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Bamboo is widely distributed, rapidly regenerable, and incorporates long cellulose fibers, which make it one of the most lightweight and strong natural materials. Processing bamboo into a high-performance structural material for plastic replacement is highly promising but challenging. In this study, an allnatural, high-performance structural material is derived from natural bamboo with superior mechanical and thermal properties that benefit from the introduction of surface charge and further layer-by-layer assembly of bamboo cellulose fibers. The obtained modified bamboo fiber plate (MBFP) transcends the constraints of the natural size and anisotropy of bamboo, showing high flexural strength (ca. 179 MPa) and flexural modulus (ca. 12 GPa). Moreover, the product has an extremely low coefficient of thermal expansion (ca. 11.3 × 10 À 6 K À 1 ), high thermal stability, and superior fire resistance. The excellent mechanical and thermal properties combined with the efficient and rational manufacturing process make MBFP a powerful plastic alternative for furniture, construction, and automotive industries.

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Section: Resultsmentioning

confidence: 78%

Section: Resultsmentioning

confidence: 99%

Constructing An All‐Natural Bulk Structural Material from Surface‐Charged Bamboo Cellulose Fibers with Enhanced Mechanical and Thermal Properties

et al. 2023

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“…The desorption of incorporated alkali under longer time provides expedient alkaline condition for oxidation on cellulose, from which delocalization derives and inhibits further esterification. A recent study concerning oxidizing systems and degradation model of cellulose has already been reported [22]. Actually, this controllable oxidation combined with minute grafting on cellulose optimizes the interfacial adhesion of composite.…”

Section: Ftir Analysismentioning

confidence: 99%

Interface Reinforcement of Pulp Fiber Based ABS Composite with Hydrogen Bonding Initiated Interlinked Structure via Alkaline Oxidation and tert-Butyl Grafting on Cellulose

Zhu

2019

Polymers

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Interface optimization in preparing natural fiber based biocomposite becomes a key factor that determines overall properties, especially mechanical performance. The solution for upgrading interfacial adhesion stemmed from polar fiber and nonpolar polymer remains unclear. Here, a kind of pulp fiber/acrylonitrile-butadiene-styrene (ABS) composite with content ratio of 1:1 was fabricated by functionalizing the cellulose fiber to coordinate interaction between fiber and ABS. With addition of 5 wt % polyacrylamide (PAM) there existed an interlinked three-element structure in composite. Three types of treatment to cellulose fiber, including alkali immersion, pivaloyl chloride grafting for 10 h and 20 h were conducted. Pulp fiber that was treated with alkali for one hour, followed by pivaloyl chloride reaction for ten hours, proved to be effective for interfacial adhesion. X-ray Photoelectron Spectroscopy (XPS) analysis reveals 21.9% of carbonyl and 12.1% of ester function in this fiber, which corresponds to oxidation and grafting. For its composite SEM picture displays that most of cellulose fiber are rooted in ABS and evident traces of tearing or fracture can be observed after tension test. DMA test indicates that this modified pulp fiber/ABS composite exhibits great compatibility, because of combined loss modulus peak ranging from 80 °C to 100 °C. Moreover, the well miscible composite has a tensile strength of 58.1 MPa and elastic modulus of 2515 MPa, increasing by nearly 50% and 60% from those of pure ABS, respectively.

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“…In another works, potassium permanganate was used to oxidize the cellulose, the oxidation leads to introduce the carboxyl groups into the oxidized polymer (Milanovic et al 2021;Zhou et al 2018) .Cotton yarns were oxidized with potassium periodate solution with TEMPO systems. Sodium chlorite was also employed for the same purpose and yielded (Toshikj et al 2019). However, Microwave radiation was never used in the oxidation of cellulose.…”

Section: Introductionmentioning

confidence: 99%

Effective Degradation of Cellulose by Microwave Irradiation in Alkaline Solution

Jabareen

Maruthapandi

Saravanan

et al. 2021

Preprint

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The utilization of lignocellulosic biomass is effective to produce chemicals and fuels, which are of importance for the establishment of a sustainable society. The conversion of cellulose, which is the main component of the lignocellulosic biomass, into significant chemicals that can be further converted to different chemicals or fuels in the subsequent step, under gentle conditions is a promising route. Organic acids such as acetic acid, glycolic acid and formic acid are significant chemicals are examples of such products. A novel method to producing important platform chemicals from Micro-crystalline cellulose was developed. Micro-crystalline cellulose was degraded as a result of an oxidation with potassium chlorate by microwave radiation, in a one-pot procedure, efficient reaction conditions such as short reaction time and full conversion of the cellulose were identified. The reaction products have been analyzed by 1H, 13C NMR, XPS, TGA and XRD.

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Influence of different oxidizing systems on cellulose oxidation level: introduced groups versus degradation model

Cited by 37 publications

References 43 publications

Constructing An All‐Natural Bulk Structural Material from Surface‐Charged Bamboo Cellulose Fibers with Enhanced Mechanical and Thermal Properties

Constructing An All‐Natural Bulk Structural Material from Surface‐Charged Bamboo Cellulose Fibers with Enhanced Mechanical and Thermal Properties

Interface Reinforcement of Pulp Fiber Based ABS Composite with Hydrogen Bonding Initiated Interlinked Structure via Alkaline Oxidation and tert-Butyl Grafting on Cellulose

Effective Degradation of Cellulose by Microwave Irradiation in Alkaline Solution

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