Modification of microcrystalline cellulose structural properties by ball-milling and ionic liquid treatments and their correlation to enzymatic hydrolysis rate and yield

Gomide, Felipe Tadeu Fiorini; Silva, Ayla Sant’Ana da; Bon, Elba P. S.; Alves, Tito Lívio Moitinho

doi:10.1007/s10570-019-02578-8

Cited by 26 publications

(7 citation statements)

References 49 publications

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“…In contrast, PP showed no effect on the enzymatic hydrolysis of Avicel regardless of the amount of PP added, indicating no significant interaction between Avicel and PP and/or no apparent inhibition to enzymes. The low glucose yield of Avicel may be mainly ascribed to its higher CrI (Gomide et al 2019 ; Ling et al 2017 ) than cellulose in PSA-Ba substrate (Additional file 1: Fig. S4).…”

Section: Resultsmentioning

confidence: 99%

Understanding the promoting effect of non-catalytic protein on enzymatic hydrolysis efficiency of lignocelluloses

Gong

Yang

Song

et al. 2021

Bioresour. Bioprocess.

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Lignin deposits formed on the surface of pretreated lignocellulosic substrates during acidic pretreatments can non-productively adsorb costly enzymes and thereby influence the enzymatic hydrolysis efficiency of cellulose. In this article, peanut protein (PP), a biocompatible non-catalytic protein, was separated from defatted peanut flour (DPF) as a lignin blocking additive to overcome this adverse effect. With the addition of 2.5 g/L PP in enzymatic hydrolysis medium, the glucose yield of the bamboo substrate pretreated by phenylsulfonic acid (PSA) significantly increased from 38 to 94% at a low cellulase loading of 5 FPU/g glucan while achieving a similar glucose yield required a cellulase loading of 17.5 FPU/g glucan without PP addition. Similar promotion effects were also observed on the n-pentanol-pretreated bamboo and PSA-pretreated eucalyptus substrates. The promoting effect of PP on enzymatic hydrolysis was ascribed to blocking lignin deposits via hydrophobic and/or hydrogen-bonding interactions, which significantly reduced the non-productive adsorption of cellulase onto PSA lignin. Meanwhile, PP extraction also facilitated the utilization of residual DPF as the adhesive for producing plywood as compared to that without protein pre-extraction. This scheme provides a sustainable and viable way to improve the value of woody and agriculture biomass. Peanut protein, a biocompatible non-catalytic protein, can block lignin, improve enzymatic hydrolysis efficiency and thereby facilitate the economics of biorefinery. Graphical abstract

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Section: Resultsmentioning

confidence: 99%

Understanding the promoting effect of non-catalytic protein on enzymatic hydrolysis efficiency of lignocelluloses

Gong

Yang

Song

et al. 2021

Bioresour. Bioprocess.

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“…Table 10 presents the specific surface area S BET [m 2 /g] measurements, obtained by the use of the BET technique [ 72 ], of the cellulose (determined and literature data), cellulose phosphates Cell- O 6 -P(O)(OH)-H and Cell- O 6 -P(O)(O − )-H(48 h) × Cu 2+ complex. Several data on specific surface area of Avicel PH-101/102 obtained by use of the BET technique are reported in the literature [ 72 , 73 , 74 , 75 , 76 , 77 ]. The literature results of cellulose specific surface area are in a wide range from 1–5.7 [m 2 /g], determined using the nitrogen gas adsorption method [ 63 , 72 , 73 , 74 , 75 , 76 , 77 ] to 149–161 [m 2 /g] while using the water vapor adsorption method [ 73 ].…”

Section: Resultsmentioning

confidence: 99%

“…Several data on specific surface area of Avicel PH-101/102 obtained by use of the BET technique are reported in the literature [ 72 , 73 , 74 , 75 , 76 , 77 ]. The literature results of cellulose specific surface area are in a wide range from 1–5.7 [m 2 /g], determined using the nitrogen gas adsorption method [ 63 , 72 , 73 , 74 , 75 , 76 , 77 ] to 149–161 [m 2 /g] while using the water vapor adsorption method [ 73 ]. The large differences in BET results may be related to different types of samples pre-treatments [ 72 , 73 ].…”

Section: Resultsmentioning

confidence: 99%

“…The determination of copper content in samples Cell-O 6 -P(O)(OH)-H × Cu 2+ (h) were assessed after prior digestion (Figure 15) by the FAAS method [71] and are listed in Table 9. [72][73][74][75][76][77]. The literature results of cellulose specific surface area are in a wide range from 1-5.7 [m 2 /g], determined using the nitrogen gas adsorption method [63,[72][73][74][75][76][77] to 149-161 [m 2 /g] while using the water vapor adsorption method [73].…”

Section: Flame Atomic Absorption Spectroscopy Faasmentioning

confidence: 99%

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Vapor Phosphorylation of Cellulose by Phosphorus Trichlo-Ride: Selective Phosphorylation of 6-Hydroxyl Function—The Synthesis of New Antimicrobial Cellulose 6-Phosphate(III)-Copper Complexes

2021

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This research is focused on a synthesis of copper-cellulose phosphates antimicrobial complexes. Vapor-phase phosphorylations of cellulose were achieved by exposing microcrystalline cellulose to phosphorus trichloride (PCl3) vapors. The cellulose-O-dichlorophosphines (Cell-O-PCl2) formed were hydrolyzed to cellulose-O-hydrogenphosphate (P(III)) (Cell-O-P(O)(H)(OH)), which, in turn, were converted into corresponding copper(II) complexes (Cell-O-P(O)(H)(OH)∙Cu2+). The analysis of the complexes Cell-O-P(O)(H)(OH)∙Cu2+ covered: scanning electron microscopy (SEM), attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR), atomic absorption spectrometry with flame excitation (FAAS), and bioactivity tests against representative Gram-negative bacteria (Escherichia coli) and Gram-positive bacteria (Staphylococcus aureus). The antimicrobial tests of synthesized Cell-O-P(O)(H)(OH)∙Cu2+ revealed their potential applications as an antibacterial material.

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“…The higher the cellulose degree of crystallinity, the lower the cellulose hydrolysis rate [25]. The comparison of different pretreatment methods discovered that variations in the crystalline conformation and those in the specific surface area of cellulose must be in association with each other [26].…”

Section: Introductionmentioning

confidence: 99%

Properties and Hydrolysis Behavior of Celluloses of Different Origin

et al. 2022

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The present paper is a fundamental study on the physicochemical properties and hydrolysis behavior of cellulose samples differing in origin: bacterial, synthetic, and vegetal. Bacterial cellulose was produced by Medusomyces gisevii Sa-12 in an enzymatic hydrolyzate derived from oat-hull pulp. Synthetic cellulose was obtained from an aqueous glucose solution by electropolymerization. Plant-based cellulose was isolated by treatment of Miscanthus sacchariflorus with dilute NaOH and HNO3 solutions. We explored different properties of cellulose samples, such as chemical composition, degree of polymerization (DP), degree of crystallinity (DC), porosity, and reported infrared spectroscopy and scanning electron microscopy results. The hydrolysis behavior was most notable dependent on the origin of cellulose. For the bacterial cellulose sample (2010 DP, 90% DC, 89.4% RS yield), the major property affecting the hydrolysis behavior was its unique nanoscale reticulate structure promoting fast penetration of cellulases into the substrate structure. The study on enzymatic hydrolysis showed that the hydrolysis behavior of synthetic and Miscanthus celluloses was most influenced by the substrate properties such as DP, DC and morphological structure. The yield of reducing sugars (RS) by hydrolysis of synthetic cellulose exhibiting a 3140 DP, 80% DC, and highly depolymerization-resistant fibers was 27%. In contrast, the hydrolysis of Miscanthus-derived cellulose with a 1030 DP, 68% DC, and enzyme-accessible fibers provided the highest RS yield of 90%. The other properties examined herein (absence/presence of non-cellulosic impurities, specific surface, pore volume) had no considerable effect on the bioconversion of the cellulosic substrates.

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Modification of microcrystalline cellulose structural properties by ball-milling and ionic liquid treatments and their correlation to enzymatic hydrolysis rate and yield

Cited by 26 publications

References 49 publications

Understanding the promoting effect of non-catalytic protein on enzymatic hydrolysis efficiency of lignocelluloses

Understanding the promoting effect of non-catalytic protein on enzymatic hydrolysis efficiency of lignocelluloses

Vapor Phosphorylation of Cellulose by Phosphorus Trichlo-Ride: Selective Phosphorylation of 6-Hydroxyl Function—The Synthesis of New Antimicrobial Cellulose 6-Phosphate(III)-Copper Complexes

Properties and Hydrolysis Behavior of Celluloses of Different Origin

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