Preparation and characterization of functional cellulose nanofibrils via formic acid hydrolysis pretreatment and the followed high-pressure homogenization

Du, Hao; Liu, Chao; Zhang, Yuedong; Yu, Guang; Si, Chuanling; Li, Bin

doi:10.1016/j.indcrop.2016.09.059

Cited by 137 publications

(69 citation statements)

References 48 publications

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“…Hydronium ions which originates from the acid catalyst cause breakdown of the long cellulose and hemicellulose chains into sugar monomers (Lloyd and Wyman, 2005). Both, inorganic acids such as sulfuric acid (Kärcher et al, 2015), phosphoric acid (Nair et al, 2015), nitric acid (Kim et al, 2015), and hydrochloric acid (Zu et al, 2014), and organic acids such as formic acid (Du et al, 2016), maleic acid (Jung et al, 2015), and oxalic acid (Jeong and Lee, 2016) are used. Acid pretreatment can be used either as concentrated acids (30-70%) at low temperature (<100 • C) or as dilute acids (0.1-10%) at high temperatures (100-250 • C).…”

Section: Acid Pretreatmentmentioning

confidence: 99%

Recent Trends in the Pretreatment of Lignocellulosic Biomass for Value-Added Products

et al. 2018

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Lignocellulosic biomass (LCB) is the most abundantly available bioresource amounting to about a global yield of up to 1. 3 billion tons per year. The hydrolysis of LCB results in the release of various reducing sugars which are highly valued in the production of biofuels such as bioethanol and biogas, various organic acids, phenols, and aldehydes. The majority of LCB is composed of biological polymers such as cellulose, hemicellulose, and lignin, which are strongly associated with each other by covalent and hydrogen bonds thus forming a highly recalcitrant structure. The presence of lignin renders the bio-polymeric structure highly resistant to solubilization thereby inhibiting the hydrolysis of cellulose and hemicellulose which presents a significant challenge for the isolation of the respective bio-polymeric components. This has led to extensive research in the development of various pretreatment techniques utilizing various physical, chemical, physicochemical, and biological approaches which are specifically tailored toward the source biomaterial and its application. The objective of this review is to discuss the various pretreatment strategies currently in use and provide an overview of their utilization for the isolation of high-value bio-polymeric components. The article further discusses the advantages and disadvantages of the various pretreatment methodologies as well as addresses the role of various key factors that are likely to have a significant impact on the pretreatment and digestibility of LCB.

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Section: Acid Pretreatmentmentioning

confidence: 99%

Recent Trends in the Pretreatment of Lignocellulosic Biomass for Value-Added Products

et al. 2018

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“…Du and coworkers used highly concentrated formic acid to hydrolyze bleached softwood pulp; then the formic esterified MCC passed through homogenizer without clogging to give CNFs [191]. The resultant CNFs showed high thermal stability (onset decomposition temperature ac.…”

Section: Organic Acid Hydrolysis Pretreatmentmentioning

confidence: 99%

Recent Strategies in Preparation of Cellulose Nanocrystals and Cellulose Nanofibrils Derived from Raw Cellulose Materials

Xie

Yang

2018

International Journal of Polymer Science

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219

128

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The recent strategies in preparation of cellulose nanocrystals (CNCs) and cellulose nanofibrils (CNFs) were described. CNCs and CNFs are two types of nanocelluloses (NCs), and they possess various superior properties, such as large specific surface area, high tensile strength and stiffness, low density, and low thermal expansion coefficient. Due to various applications in biomedical engineering, food, sensor, packaging, and so on, there are many studies conducted on CNCs and CNFs. In this review, various methods of preparation of CNCs and CNFs are summarized, including mechanical, chemical, and biological methods. The methods of pretreatment of cellulose are described in view of the benefits to fibrillation.

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“…Moreover, such pretreatments might minimize the sizes of the cellulose fibers, thus avoiding clogging of the homogenizer (Li et al, 2012). Hydrolysis with milder organic acids, such as formic acid, has been reported for cellulose pretreatment before the mechanical treatment for nanocellulose production (Li et al, 2015;Du et al, 2016;Lv et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Preparation of Surface-Modified Nanocellulose from Sugarcane Bagasse by Concurrent Oxalic Acid-Catalyzed Reactions

Sriruangrungkamol¹,

Wongjaiyen²,

Brostow³

et al. 2020

CMUJNS

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Concurrent oxalic acid-catalyzed reactions, including cellulose hydrolysis and esterification of the hydrolyzed cellulose, were performed to prepare the nanocellulose from sugarcane bagasse. Hydrothermal hydrolysis at 100 o C in a microwave digester was performed using oxalic acid at the concentrations of 0, 5, 10, and 30%w/v as catalysts. The hydrolyzed cellulose so obtained was characterized by several techniques, including FTIR, TGA, XRD, and viscosity measurements. The concentration of oxalic acid slightly affects the thermal stability, crystallinity, and molecular weight of the hydrolyzed cellulose. Apart from acting as a catalyst, oxalic acid at 10 or 30%w/v could react with OH groups of the cellulose by esterification. After mechanical homogenization, microfibrils of hydrolyzed cellulose were separated. The SEM results show a web-like network structure of the mixture of cellulose fibrils (CNFs) and fibril aggregates-indicating the nanofiber form of nanocellulose. The dispersion stability of the suspensions in deionized water and organic solvents (dimethyl formamide (DMF) and acetone) increases with increasing concentration of oxalic acid for hydrolysis-as seen in the presence of oxalate groups on the surfaces of CNFs. Thus, the microwaveassisted oxalic acid hydrolysis, followed by the homogenization of cellulose provides a potential method for the production of surface-modified CNFs.

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Preparation and characterization of functional cellulose nanofibrils via formic acid hydrolysis pretreatment and the followed high-pressure homogenization

Cited by 137 publications

References 48 publications

Recent Trends in the Pretreatment of Lignocellulosic Biomass for Value-Added Products

Recent Trends in the Pretreatment of Lignocellulosic Biomass for Value-Added Products

Recent Strategies in Preparation of Cellulose Nanocrystals and Cellulose Nanofibrils Derived from Raw Cellulose Materials

Preparation of Surface-Modified Nanocellulose from Sugarcane Bagasse by Concurrent Oxalic Acid-Catalyzed Reactions

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