Lignin containing cellulose nanofibers (LCNFs): Lignin content-morphology-rheology relationships

Yuan, Tianzhong; Zeng, Jinsong; Wang, Bin; Cheng, Zheng; Chen, Kefu

doi:10.1016/j.carbpol.2020.117441

Cited by 80 publications

(26 citation statements)

References 57 publications

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“…This can be correlated in the following section with the morphology of the samples. Additionally, the present crystallinity results were in accordance with the findings obtained in the thermal analysis discussed in the previous sections, where larger degradation temperatures can be related to larger crystallinity of the samples due to the increase in cellulose content (Espinosa et al 2017;Debiagi et al 2020;Yuan et al 2021).…”

Section: Crystallinitysupporting

confidence: 92%

Correlations between rheological behavior and intrinsic properties of nanofibrillated cellulose from wood and soybean hulls with varying lignin content

Iglesias

Hamade

Aksoy

et al. 2021

BioRes

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Effects of raw material and chemical composition were considered relative to the intrinsic properties and the rheological behavior of nanofibrillated cellulose aqueous suspensions (CNFs). Atomic force microscopy, Fourier-transform infrared spectroscopy, surface chemistry analysis, thermal gravimetrical analysis, and zeta-potential were used to study the morphology, chemical composition, charge density, as well as thermal and colloidal stability of the different CNFs. Regarding the rheological properties of the samples, steady-state and oscillation studies of the CNF aqueous suspensions obtained from wood and soybean hulls were performed. An interesting correlation was found between the rheological behavior of CNF suspensions and their intrinsic properties. Soybean CNF presented lower viscosities than wood samples, which could be related to their morphology and charge density. Additionally, unbleached soybean CNF (sb-LCNF) showed yield stress compared with the other samples, which could be attributed to the presence of pectin. Furthermore, the different chemical compositions between the samples affected their thermal properties, as well as on their crystallinity.

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Section: Crystallinitysupporting

confidence: 92%

Correlations between rheological behavior and intrinsic properties of nanofibrillated cellulose from wood and soybean hulls with varying lignin content

Iglesias

Hamade

Aksoy

et al. 2021

BioRes

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“…Though they were longer, stem AH-CNFs presented slightly lower viscosity than stem AH-CNCs. Studies by Yuan et al 25 showed that at the same concentration level and shear rate, CNFs containing a lower amount of residual lignin (ca. 6%) presented the highest viscosity, while CNFs containing a higher amount of residual lignin (ca.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…21,22 Additionally, lignin-containing CNFs are outstanding nanocomposite nanofillers with UV-shielding, 23 antioxidant, 24 and viscositymodulating properties. 25,26 The present work reports the concomitant production of CNFs and CNCs from elephant grass (Pennisetum purpureum) using two pathways: sulfuric acid hydrolysis and TEMPOoxidation, followed by sonication. This perennial forage crop, found as agricultural surplus or waste, contains a high concentration of cellulose (more than 30 wt %) in both leaves and stems, 27 which were separately converted into cellulose nanostructures.…”

Section: ■ Introductionmentioning

confidence: 99%

“…For instance, characteristics such as length, aspect ratio, crystallinity, and degree of polymerization influence the optical transmittance, tensile strength, and oxygen-barrier properties of CNF films and coatings . In turn, the CNC surface charge and zeta potential, as well as the presence of residual lignin in CNFs, affect the capacity of these nanostructures to stabilize Pickering emulsions. , Additionally, lignin-containing CNFs are outstanding nanocomposite nanofillers with UV-shielding, antioxidant, and viscosity-modulating properties. , …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Structure–Property Relationships of Cellulose Nanocrystals and Nanofibrils: Implications for the Design and Performance of Nanocomposites and All-Nanocellulose Systems

Camargos

Rezende

2021

ACS Appl. Nano Mater.

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Cellulose nanocrystals (CNCs) and nanofibrils (CNFs) are sustainable candidates for designing nanocomposites and all-nanocellulose systems for a myriad of advanced applications, such as protective coatings, packaging materials, and hydrogels. The role of nanocellulose in such different applications is mainly determined by its morphological and physicochemical properties. Although these properties have been studied at length by a consistent and growing number of publications, there is still a lack of a comprehensive study of the relationships between structure, properties, and functions of different nanocelluloses. Here, we thoroughly investigated the combined effect of distinct production methods and anatomical origins of non-wood cellulose on the structure−property relationships of CNCs and CNFs. These nanoparticles were obtained by the most established production approaches, that is, sulfuric acid hydrolysis or TEMPO-mediated oxidation/fibrillation of elephant grass leaves or stems, that is, two different parts of a unique biosource. We were able to prepare CNCs and CNFs with modulated morphological features and degrees of polymerization, which implied major effects on the mechanical and rheological behaviors of nanocellulose films and dispersions, respectively. Additionally, tailoring lignin and ionizable group contents as well as the color, transparency, and stability of nanocellulose dispersions could provide important implications for the shelf life of nanocellulose formulations, as well as for their application as nanocomposite additives with UV-protection and antioxidant abilities. Therefore, the assembly of results presented here can work as a tool to guide decision-making for both (1) the selection of methods and/or plant anatomical parts to produce nanocelluloses with tailored properties and (2) the prospects of combining different cellulose nanostructures to design advanced materials.

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“…For any system with a network structure, the initial shear stress will cause the deformation of the network structure. When the applied stress is greater than the yield stress, the emulsion begins to flow, so the yield stress (

) can be used to predict the stability of the network structure in the emulsions [ 36 ]. As shown in Figure 5 B, the yield stress (

) of OIDF-Pickering emulsions stabilized by unmodified and modified OIDF were 3.16 and 4.77 Pa, respectively, which were higher than that of different morphologies of cellulosic fibers, including extruded cellulose, incomplete nano fibrotic cellulose of 0.28 Pa, incomplete nano fibrotic cellulose of 0.96 Pa, and complete nano fibrotic cellulose of 2.90 Pa [ 32 ].…”

Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Pickering Emulsions with Modified Okara Insoluble Dietary Fiber

Bao

Xue

Yang

et al. 2021

Foods

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Modified okara insoluble dietary fiber (OIDF) has attracted great interest as a promising Pickering emulsifier. At present, the modification methods are mainly physicochemical methods, and the research on microbial modified OIDF as stabilizer is not clear. In this work, modified OIDF was prepared by yeast Kluyveromyces marxianus fermentation. The potential of modified OIDF as a Pickering emulsifier and the formation and stability of OIDF-Pickering emulsions stabilized by modified OIDF were characterized, respectively. The results showed that the specific surface area, hydrophilicity, and electronegativity of the modified OIDF were all enhanced compared with the unmodified OIDF. The existence of the network structure between droplets is the key to maintain the stability of the emulsions, as indicated by Croy-Scanning Electron Microscope (Croy-SEM) and rheological properties measurements. The stability of OIDF-Pickering emulsions was evaluated in terms of storage time, centrifugal force, pH value, and ionic strength (NaCl). Moreover, the OIDF-Pickering emulsions stabilized by modified OIDF showed better stability. These results will contribute to the development of efficient OIDF-based emulsifiers, expand the application of emulsions in more fields, and will greatly improve the high-value utilization of okara by-products.

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Lignin containing cellulose nanofibers (LCNFs): Lignin content-morphology-rheology relationships

Cited by 80 publications

References 57 publications

Correlations between rheological behavior and intrinsic properties of nanofibrillated cellulose from wood and soybean hulls with varying lignin content

Correlations between rheological behavior and intrinsic properties of nanofibrillated cellulose from wood and soybean hulls with varying lignin content

Structure–Property Relationships of Cellulose Nanocrystals and Nanofibrils: Implications for the Design and Performance of Nanocomposites and All-Nanocellulose Systems

Preparation and Characterization of Pickering Emulsions with Modified Okara Insoluble Dietary Fiber

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