Method of obtaining cellulose diacetate with a pregiven chiral structure for highly efficient materials

Shipovskaya, A. B.; Rogacheva, S. M.; Malinkina, О. N.

doi:10.1007/s10570-020-03439-5

Cellulose

2020

DOI: 10.1007/s10570-020-03439-5

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Method of obtaining cellulose diacetate with a pregiven chiral structure for highly efficient materials

A. B. Shipovskaya

S. M. Rogacheva

О. N. Malinkina

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Cited by 3 publications

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“…To address these limitations, cellulose is typically transformed into derivatives like cellulose acetate, nitrocellulose, methylcellulose, and carboxymethyl cellulose. Among them, cellulose acetate is distinguished by its compostable and biodegradable characteristics, making it an excellent choice for producing food packaging materials, textile fibers, paints, 867 photographic films, medical and pharmaceutical products, 16 filtration membranes, 17 bioremediation, 18,19 and membranes for drug delivery systems. 20 The versatility of cellulose acetate in these applications helps to reduce the dependence on fossil fuels in various industrial sectors.…”

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Production and characterization of cellulose acetate using olive tree pruning biomass as feedstock

Rodríguez‐Liébana,

Robles‐Solano,

Jurado‐Contreras

et al. 2024

Biofuels Bioprod Bioref

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Olive tree pruning (OTP) is one of the most abundant sources of biomass waste in the Mediterranean basin. This is especially relevant in southern Spain where olive oil production represents a large part of the economy. Olive tree prunings are mostly either burned or are spread in olive orchards as an organic amendment, or used for heat generation on a domestic scale. However, the lignocellulosic composition of OTP makes it a potential source of biopolymers, thus providing an excellent economic alternative for the olive oil sector. In this work, pretreated OTP fibers were subjected to an optimized alkaline treatment followed by a single‐step bleaching reaction with H2O2. Afterwards, the cellulose pulp was transformed chemically to obtain cellulose acetate. Noncellulosic components were removed effectively from OTP, thus obtaining a pulp highly purified in cellulose with 71% crystallinity and 355 °C maximum degradation temperature. Nevertheless, a very large amount of cellulose (ca. 50%) was eliminated throughout the process, especially during acid pretreatment, which was responsible for 38% solubilization. A similar level of acetylation and degree of substitution was obtained by using acetylation times in the range of 1 to 6 h. No large differences were observed in the infrared spectra and X‐ray diffractograms of the synthesized acetates. However, their thermal stability varied significantly with reaction time, evolving from a multistep degradation pattern to a single and sharp peak between 300 and 400 °C with increasing time. Thermogravimetric curves revealed that at least 5 h (preferably 6 h) were needed to obtain cellulose acetate from OTP with adequate thermal stability for further processing.

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mentioning

confidence: 99%

Production and characterization of cellulose acetate using olive tree pruning biomass as feedstock

Rodríguez‐Liébana,

Robles‐Solano,

Jurado‐Contreras

et al. 2024

Biofuels Bioprod Bioref

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A study of rheological properties of cellulose diacetate in acetone solution at low and high shear rates

Su¹,

Lei²,

Yang³

et al. 2021

Polymer Engineering & Sci

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The rheological properties of cellulose diacetate (CDA) with different intrinsic viscosity (IV) and different concentration in acetone solutions were studied at low and high shear rates. The zero-shear viscosity increased and the structural index increased, when the IV of CDA was increased or the acetone solution concentration was increased. Evidence suggested that a sulfate structure may be forming. It is shown that the increase of hemicellulose and sulfur content is associated with an increase of chain entanglements between CDA molecules and the abnormal increase of solution zero-shear viscosity. At a high shear rate, the correlation curve between inlet pressure drop and solution concentration obtained by Bagley method analysis shows an inflection point, which appears to be the critical concentration at which the cellulose diacetate molecular chains in the solution form a long range entangled elastic network. After the concentration exceeds a certain range of above critical points, the entanglement of the molecular chains in the solution is significantly enhanced. The zero shear viscosity inflection point concentration calculated by the rheological curve with low shear velocity and the inlet pressure drop inflection point concentration calculated by the capillary rheological calculation have good consistency.

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Cellulose acetate from lignocellulosic residues: An eco-friendly approach based on a hydrothermal process

Paiva

Silva

Brisola

et al. 2023

International Journal of Biological Macromolecules

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Method of obtaining cellulose diacetate with a pregiven chiral structure for highly efficient materials

Cited by 3 publications

References 46 publications

Production and characterization of cellulose acetate using olive tree pruning biomass as feedstock

Production and characterization of cellulose acetate using olive tree pruning biomass as feedstock

A study of rheological properties of cellulose diacetate in acetone solution at low and high shear rates

Cellulose acetate from lignocellulosic residues: An eco-friendly approach based on a hydrothermal process

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