Enzymatic Deconstruction of Sugarcane Bagasse and Straw to Obtain Cellulose Nanomaterials

Aguiar, Jéssica de; Bondancia, Thalita J.; Claro, Pedro Ivo Cunha; Mattoso, Luiz H. C.; Farinas, Cristiane S.; Marconcini, J. M.

doi:10.1021/acssuschemeng.9b06806

Cited by 133 publications

(75 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This can be explained by direct competition between these classes of compounds: high production of one generally means low production of the other. In a recent study by Aguiar et al [ 11 ] on the production of CNCs from hydrolysis of pretreated sugarcane and straw, the authors reported the production of a glucose stream with 84 and 75 g/L, respectively; the yield of CNCs production was 11.3% and 12%, respectively, markedly inferior to the levels usually obtained by acid hydrolysis, as pointed out by the authors. Bondancia et al [ 55 ] reported the production of a glucose stream with 91 g/L and the presence of CNF structures in the final spent solid with a CI of 83%, opposed to 72% before hydrolysis.…”

Section: Nanocellulose Production By Enzymatic Hydrolysismentioning

confidence: 85%

“…Regarding the extraction of CNCs, the most common procedure consists on a sonication step after hydrolysis, allowing an intense fragmentation of NC into particles within a nanoscale size range [ 62 ] and their efficient dispersion, even though some authors have also described its use before hydrolysis [ 67 ]. Some studies have equally reported the application of sulfuric acid [ 42 , 68 ] or other chemicals [ 2 ] after enzymatic hydrolysis or, in total opposite, no treatment after enzymatic hydrolysis [ 11 , 48 , 69 , 70 , 71 ].…”

Section: Nanocellulose Production By Enzymatic Hydrolysismentioning

confidence: 99%

“…In the specific context of NC production, the common pH range is 4–5.8, with only a few exceptions; both Li et al [ 46 ] and Paakko et al [ 63 ] already reported the utilization of a pH of 7. This range of pH values is especially relevant for the cases when enzymatic treatment is preceded by an alkaline [ 11 , 101 ] or acidic [ 65 , 102 ] treatment, intended for hemicellulose/lignin removal, or the first step of NC production; this would require intensive washing and/or pH adjustment (e.g., dialysis) prior to the addition of enzymes.…”

Section: Nanocellulose Production By Enzymatic Hydrolysismentioning

confidence: 99%

“…The production of NC using strong acid hydrolysis, though, is not compatible with a biorefinery scheme, since costly steps of neutralization are required previous to the fermentation process, and other thermochemical processes (such as pyrolysis, liquefaction, and gasification) are not possible due to the high degree of depolymerization of macromolecules into monomers [ 10 ]. Therefore, the enzymatic hydrolysis route to obtain NC is shown as a promising alternative to chemical catalysis, as it is compatible with biological processes and yields nanostructures easier to functionalize and with high thermal stability [ 11 ]. The use of enzymes in processes of NC production is less explored in the literature comparatively to chemical and mechanical processes.…”

Section: Introductionmentioning

confidence: 99%

“…The use of enzymes in processes of NC production is less explored in the literature comparatively to chemical and mechanical processes. Nevertheless, several authors have evaluated this strategy in combination with other treatments and/or integrated with the production of biofuels [ 2 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Nanocellulose Production: Exploring the Enzymatic Route and Residues of Pulp and Paper Industry

et al. 2020

View full text Add to dashboard Cite

Increasing environmental and sustainability concerns, caused by current population growth, has promoted a raising utilization of renewable bio-resources for the production of materials and energy. Recently, nanocellulose (NC) has been receiving great attention due to its many attractive features such as non-toxic nature, biocompatibility, and biodegradability, associated with its mechanical properties and those related to its nanoscale, emerging as a promising material in many sectors, namely packaging, regenerative medicine, and electronics, among others. Nanofibers and nanocrystals, derived from cellulose sources, have been mainly produced by mechanical and chemical treatments; however, the use of cellulases to obtain NC attracted much attention due to their environmentally friendly character. This review presents an overview of general concepts in NC production. Especial emphasis is given to enzymatic hydrolysis processes using cellulases and the utilization of pulp and paper industry residues. Integrated process for the production of NC and other high-value products through enzymatic hydrolysis is also approached. Major challenges found in this context are discussed along with its properties, potential application, and future perspectives of the use of enzymatic hydrolysis as a pretreatment in the scale-up of NC production.

show abstract

Section: Nanocellulose Production By Enzymatic Hydrolysismentioning

confidence: 85%

Section: Nanocellulose Production By Enzymatic Hydrolysismentioning

confidence: 99%

Section: Nanocellulose Production By Enzymatic Hydrolysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Nanocellulose Production: Exploring the Enzymatic Route and Residues of Pulp and Paper Industry

et al. 2020

View full text Add to dashboard Cite

show abstract

Nanoparticle Decorated Cellulose Nanocrystals (CNC) Composites for Energy, Catalysis, and Biomedical Applications

Raghuwanshi,

Garnier

2024

Adv Funct Materials

View full text Add to dashboard Cite

Decorating cellulose nanocrystals(CNC) with nanoparticles(NPs) allows to engineer novel CNC/NPs composites for advanced technologies and applications. NPs are well‐known for their unique and highly efficient properties. However, NPs present challenges and limitations due to their aggregation, non‐uniform growth, size distribution, and nanotoxicity. CNC surface overcomes most of these drawbacks by providing an attractive matrix/template to grow NPs of desirable morphology, distribution, and functionality. CNC has distinctive properties such as biodegradability, high surface area, low cost, good mechanical strength, surface functionality, and chiral nematic self‐assembly. CNC/NPs composites combine the unique properties of both CNC and NPs. This review highlights the unique characteristics of CNC, NPs, and their composites for energy, catalysis, and biomedical applications. First, different production methods for CNC with their effect on morphology, crystallinity index, and yield are presented. Both organic and inorganic NPs are used to decorate either a pristine or a functionalized CNC surface. In situ nucleation and growth methods are compared with the direct incorporation of pre‐formed NPs on the CNC surface. Applications of CNC/NPs composites are reviewed for energy storage material, conductive materials, catalysts, antibacterial agents, biosensors, and bioimaging. Finally, the current challenges and perspectives are presented for unleashing new possibilities in developing functional CNC‐NPs composites.

show abstract

Recent Progress in Production Methods for Cellulose Nanocrystals: Leading to More Sustainable Processes

Tang

Yang

Vignolini

2022

Advanced Sustainable Systems

View full text Add to dashboard Cite

202100100polymers, hemicelluloses and lignin, further assembling into cellulose fibers. Cellulose microfibrils are semicrystalline as the tight packing of cellulose chains at the biosynthesis site leads to the formation of crystalline regions which are stabilized by intra-and intermolecular hydrogen bonds as well as dispersion forces. [4] These crystalline regions are periodically separated by very short areas (a few nanometers) where the molecules are disordered but still aligned along the fiber axis. [5,6] These disordered regions are crucial to CNCs preparation and determines the length of resulting CNCs upon chemical treatments. Recent studies suggest such defects are artificially formed during processing, such as drying, rather than inherent to the native microfibril structures. [7,8] CNCs, also known as nanowhiskers, are colloidal rodshaped particles characterized by high crystallinity. [9] They can be extracted from various cellulose sources from plants such as wood pulp, cotton, and ramie, to tunicate and bacteria. [10] Due to their low densities (about 1.6 g cm −3 [11] ) and impressive mechanical strengths (Young's modulus above 100 GPa in the axial direction, similar to that of Kevlar [12,13] ), CNCs have found applications as reinforcement agents in polymer nanocomposites, [14] oxygen and moisture barriers, [14] and for smart coatings in photonic applications, [15] electronic materials, [16] biodegradable packing and food ingredients. [17] The growing interest in such a novel biomaterial has resulted in accelerated industrial production of CNCs, with several companies active in the sector. [18][19][20] As an example, Celluforce is a fully functioning industrial plant in Canada that uses wood pulp as a raw material to produce up to 300 tons of CNCs annually. Melodea Ltd is currently operating a pilot-scale production line that produces sulfated CNCs in Israel (producing 100 kg per day), which, once fully scaled-up, should ultimately be able to produce 200 tons of CNCs per year in Sweden. The University of Maine Process Development Center, based in the US, can produce 90 kg of sulfated CNCs a week from dissolving wood pulp. GranBio (formerly American Process) exploits agricultural residues to produce CNCs using sulfur dioxide/ethanol mixtures with a production capacity of 0.5 ton per day. Blue Goose Biorefineries and Anomera (both in Canada) are producing carboxylated CNCs from viscose grade dissolving pulp with a capacity of about 100-150 kg per week.However, so far, the production of CNCs on an industrial scale mainly relies on sulfuric acid hydrolysis. The first successful preparation of an aqueous colloidal cellulose solution was by Rånby in 1949 using 2.5 N sulfuric acid. [21,22] Since then,

show abstract

Enzymatic Deconstruction of Sugarcane Bagasse and Straw to Obtain Cellulose Nanomaterials

Cited by 133 publications

References 61 publications

Nanocellulose Production: Exploring the Enzymatic Route and Residues of Pulp and Paper Industry

Nanocellulose Production: Exploring the Enzymatic Route and Residues of Pulp and Paper Industry

Nanoparticle Decorated Cellulose Nanocrystals (CNC) Composites for Energy, Catalysis, and Biomedical Applications

Recent Progress in Production Methods for Cellulose Nanocrystals: Leading to More Sustainable Processes

Contact Info

Product

Resources

About