Towards a cellulose-based society: opportunities and challenges

Wang, Jinwu; Wang, Lu; Gardner, Douglas J.; Shaler, Stephen M.; Cai, Zhiyong

doi:10.1007/s10570-021-03771-4

Cited by 52 publications

(31 citation statements)

References 214 publications

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“…Nowadays, there are several well-known pulp and paper processes at industrial scale, including Kraft, Soda and Sulfite pulping, that uses water and inorganic chemicals, like NaOH, Na2S, SO2 and alkali metals, to enable wood delignification efficiently and to maintain cellulose fibres intact and at desired strength. Cellulose pulp has been used mostly in the manufacture of paper and carboards, but an increasing interest to produce novel cellulose-based materials to substitute petrochemical ones has been observed lately as a clear movement to increase sustainability [7]. This kind of strategy is expected to place pulp and paper industries in the path of the biorefinery concept and could be a model to follow in the bioeconomy activity.…”

Section: Introductionmentioning

confidence: 99%

Biomass delignification with green solvents towards lignin valorisation: ionic liquids vs deep eutectic solvents

Lopes¹

2021

Acta Innovations

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The use of renewable resources as feedstocks to ensure the production of goods and commodities for society has been explored in the last decades to switch off the overexploited and pollutant fossil-based economy. Today there is a strong movement to set bioeconomy as priority, but there are still challenges and technical limitations that must be overcome in the first place, particularly on biomass fractionation. For biomass to be an appellative raw material, an efficient and sustainable separation of its major components must be achieved. On the other hand, the technology development for biomass valorisation must follow green chemistry practices towards eco-friendly processes, otherwise no environmental leverage over traditional petrochemical technologies will be acquired. In this context, the application of green solvents, such as ionic liquids (ILs) and deep eutectic solvents (DES), in biomass fractionation is envisaged as promising technology that encompasses not only efficiency and environmental benefits, but also selectivity, which is a crucial demand to undertake cascade processes at biorefinery level. In particular, this article briefly discusses the disruptive achievements upon the application of ILs and DES in biomass delignification step towards an effective and selective separation of lignin from polysaccharides. The different physicochemical properties of these solvents, their interactions with lignin and their delignification capacity will be scrutinized, while some highlights will be given to the important characteristics of isolated lignin fractions for further valorisation. The advantages and disadvantages between ILs and DES in biomass delignification will be contrasted as well along the article.

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Section: Introductionmentioning

confidence: 99%

Biomass delignification with green solvents towards lignin valorisation: ionic liquids vs deep eutectic solvents

Lopes¹

2021

Acta Innovations

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“…С этим согласуются также данные обработки рамановских спектров и испытаний на трехточечный изгиб с помощью атомносиловых микроскопов [2]. Прочность микроволокон диаметром 8−12 µm (0.8−1.57 GPa) [36,37,64]…”

Section: Discussionunclassified

Локальные Механические Свойства И Кольцевая Структура Древесины, Исследованные Методом Сканирующего Наноиндентирования

Головин¹,

Тюрин²,

Гусев³

et al. 2022

Журнал Технической Физики

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The paper presents the results of scanning of mechanical properties of coniferous (common pine Pinus sylvestris) and deciduous (small-leaved lime Tilia cordata and common oak Quercus robur) trees wood using nanoindentation on crosscut face. Manifold increase in microhardness H and Young’s modulus E has been observed between early and late wood in every annual growth ring. Significant differences in intraring radial dependencies of H and E have been found among studied species. For all studied species the average values of E and H of early wood in each annual ring are found to be independent from ring width, while such dependence for late wood is weak at most. The ring widths measured by nanoindentation coincide with the ones measured by standard optical method within 2-3%. The developed technique and obtained results can be useful 1) to amend the understanding the origins of macromechanical properties of various wood species and their dependence upon microstructural characteristics and growth conditions, 2) to optimize the technologies of growing, reinforcement and subsequent usage of the wood, 3) to develop new independent high resolution methods in dendrochronology.

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“…Detailed characteristics will be elucidated in future reports. By studying ACCs encompassing the entire range of the CNF/AC ratio, nanocomposites with a modulus of 2-12 GPa and strength of 55-110 MPa can be rationally designed and prepared, expanding the engineering space spanned by cellulose-plastic composites [50] and other ACCs [9,10]. 5 offer insights into the mechanical behaviors of composite films.…”

Section: Mechanical and Fracture Surface Analysismentioning

confidence: 99%

Cellulose Nanocomposites of Cellulose Nanofibers and Molecular Coils

et al. 2021

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All-cellulose nanocomposites have been produced from cellulose nanofiber (CNF) suspensions and molecular coil solutions. Morphology and small-angle neutron scattering studies show the exfoliation and dispersion of CNFs in aqueous suspensions. Cellulose solutions in mixtures of ionic liquid and organic solvents were homogeneously mixed with CNF suspensions and subsequently dried to yield cellulose composites comprising CNF and amorphous cellulose over the entire composition range. Tensile tests show that stiffness and strength quantities of cellulose nanocomposites are the highest value at ca. 20% amorphous cellulose, while their fracture strain and toughness are the lowest. The inclusion of amorphous cellulose in cellulose nanocomposites alters their water uptake capacity, as measured in the ratio of the absorbed water to the cellulose mass, reducing from 37 for the neat CNF to less than 1 for a composite containing 35% or more amorphous cellulose. This study offers new insights into the design and production of all-cellulose nanocomposites.

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Towards a cellulose-based society: opportunities and challenges

Cited by 52 publications

References 214 publications

Biomass delignification with green solvents towards lignin valorisation: ionic liquids vs deep eutectic solvents

Biomass delignification with green solvents towards lignin valorisation: ionic liquids vs deep eutectic solvents

Локальные Механические Свойства И Кольцевая Структура Древесины, Исследованные Методом Сканирующего Наноиндентирования

Cellulose Nanocomposites of Cellulose Nanofibers and Molecular Coils

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