Direct Dissolution of Cellulose: Background, Means and Applications

Olsson, Carina; Westman, Gunnar

doi:10.5772/52144

Cited by 84 publications

(76 citation statements)

References 144 publications

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“…Therefore, a modified hydrolysis pretreatment for large-scale production with milder reaction conditions has been explored in this study; this modified approach combines Cr(III)-based metal salt and dilute H2SO4. Dilute H2SO4 swells and opens cellulose fibers without degrading the polymers into undesirable by-products (i.e., glucose monomers) (Olsson and Westman 2013). Thus, it is possible to enhance the targeted hydrolysis of glycosidic linkages, such that long polymeric chains of cellulose are broken into nano-dimensional crystalline cellulose particles (Kopania et al 2012).…”

Section: Introductionmentioning

confidence: 99%

A Response Surface Methodology Study: Effects of Trivalent Cr3+ Metal Ion-Catalyzed Hydrolysis on Nanocellulose Crystallinity and Yield

Chen¹,

Lee²,

Hamid³

2016

BioResources

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The preparation of nanocellulose via Cr(NO3)3-assisted sulfuric acid hydrolysis was optimized using response surface methodology (RSM). The experiment was performed using a five-level, four-factor central composite design coupled with RSM in order to optimize nanocellulose crystallinity and product yield. Four factors were evaluated for the preparation of nanocellulose: (1) reaction temperature, (2) hydrolysis time, (3) Cr(NO3)3 concentration, and (4) H2SO4 concentration. Based on the RSM model, the maximum yield and highest crystallinity of nanocellulose was obtained under hydrolysis conditions of 82.2 °C, 0.22 M Cr(NO3)3, and 0.80 M H2SO4 with 1 h of reaction. Furthermore, the physicochemical properties of the obtained nanocellulose were examined, revealing that the amorphous regions were successfully hydrolyzed, while the crystalline region remained unaltered. Morphology analysis also showed that the nanocellulose was an interconnected web-like network. Thus, both H2SO4 and Cr(III) metal salt concentration were important factors that influenced the nanocellulose yield and crystallinity index.

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Section: Introductionmentioning

confidence: 99%

A Response Surface Methodology Study: Effects of Trivalent Cr3+ Metal Ion-Catalyzed Hydrolysis on Nanocellulose Crystallinity and Yield

Chen¹,

Lee²,

Hamid³

2016

BioResources

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“…The polymeric sheets of cellulose are further packed into crystals by hydrophobic interactions. The extensive hydrogen bond network strongly holds the chains together and provides cellulose with its highly ordered hierarchical 3D organization, insolubility in most organic solvents, low density, and fiber cohesiveness (Lindman et al, 2010;Lavoine, 2012;Olsson and Westman, 2013). Cellulose has several crystalline polymorphs: I, II, III, and IV.…”

Section: Cellulose: Structure and Morphologymentioning

confidence: 99%

Cellulose Nanocrystals as Advanced "Green" Materials for Biological and Biomedical Engineering

Sinha¹,

Martin²,

Lim³

et al. 2015

Journal of Biosystems Engineering

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Background: Cellulose is a ubiquitous, renewable and environmentally friendly biopolymer, which has high promise to fulfil the rising demand for sustainable and biocompatible materials. Particularly, the recent progress in the synthesis of highly crystalline cellulose-based nanoscale biomaterials, namely cellulose nanocrystals (CNCs), draws significant attention from many research communities, ranging from bioresource engineering, to materials science and engineering, to biological and biomedical engineering to bionanotechnology. The feasibility of harnessing CNCs' unique biophysicochemical properties has inspired their basic and applied research, offering much promise for new biomaterials with diverse advanced functionalities. Purpose: This review focuses on vital issues and topics on the recent advances in CNC-based biomaterials with potential, in particular, for bionanotechnology and biological and biomedical engineering. The challenges and limitations of CNC technology are discussed as well as potential strategies to overcome them, providing an essential source of information in the exploration of possible and futuristic applications of the CNC-based functional "green" nanomaterials. Conclusion: CNCs offer exciting possibilities for advanced "green" nanomaterials, driving innovative research and development in a wide range of fields, including biological and biomedical engineering.

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“…Solvents are also scarce and it does not dissolve in any of the common liquids. Early industrial processes used complex solvents whose utilization is currently restricted because of environmental and economic issues [22,23]. New "greener" and non-degrading cellulose solvents have been actively sought during the last few decades, including ionic liquids.…”

Section: Cellulosementioning

confidence: 99%

Synergy in food, energy and advanced materials production from biomass

Galembeck

2017

Pure and Applied Chemistry

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Biomass is a sustainable alternative to fossil fuels, as a source of energy and raw materials for industry. However, this is often criticized, based on an alleged competition with food production due to the presumed scarcity of agricultural land. Data from Brazil and Ethiopia show that the creation and dissemination of new agricultural technology actually allows a significant increase in the production of food as well as energy and raw materials from biomass, bringing economic, social and environmental benefits. Moreover, polymers from biomass display unique features that make them suitable as the basis for making advanced materials, with desirable combinations of chemical and physical properties required for some applications. For instance, natural rubber and cellulose have been used to create new complex nanostructured solids capable of performing new functions. Biomass can thus be exploited as a source of new materials as well as petrochemical-like building blocks.

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Direct Dissolution of Cellulose: Background, Means and Applications

Cited by 84 publications

References 144 publications

A Response Surface Methodology Study: Effects of Trivalent Cr3+ Metal Ion-Catalyzed Hydrolysis on Nanocellulose Crystallinity and Yield

A Response Surface Methodology Study: Effects of Trivalent Cr3+ Metal Ion-Catalyzed Hydrolysis on Nanocellulose Crystallinity and Yield

Cellulose Nanocrystals as Advanced "Green" Materials for Biological and Biomedical Engineering

Synergy in food, energy and advanced materials production from biomass

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