Nanocellulose properties and applications in colloids and interfaces

Salas, Carlos; Nypelö, Tiina; Rodríguez‐Abreu, Carlos; Carrillo, Carlos A.; Rojas, Orlando J.

doi:10.1016/j.cocis.2014.10.003

Cited by 563 publications

(287 citation statements)

References 190 publications

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“…In that perspective, the aggregation and gelation of the nanocellulose dispersed in suspension become crucial for further development of new materials (Chau et al 2015;Salas et al 2014). Thus, understanding how the interactions of nanocellulose, i.e.…”

Section: Introductionmentioning

confidence: 99%

Aggregation behavior of aqueous cellulose nanocrystals: the effect of inorganic salts

et al. 2016

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Natural anisotropic building-blocks such as cellulose nanocrystals (CNCs) have attracted considerable attention due to their biodegradability and nanometer-size. In this work the colloidal behavior of CNCs, obtained from sulfuric acid hydrolysis of microcrystalline cellulose, has been studied in presence of salts of different valences. The influence on the colloidal stability and nature of aggregates has been investigated for monovalent salts (LiCl, NaCl, KCl, CsCl), divalent salts (CaCl 2 and MgCl 2 ), and a trivalent salt (AlCl 3 ), both experimentally by means of turbidity and small angle X-ray scattering (SAXS) measurements, as well as by Monte Carlo simulations using a simple coarse-grained model. For the entire salt series, a critical aggregation concentration (CAC) could be determined by turbidity measurements, as a result of the reduction of effective Coulomb repulsions due to the presence of sulfate groups on the CNC surface. The CACs also followed the Schulze-Hardy law, i.e. the critical aggregation concentration decreased with increasing counterion valence. For the monovalent ions, the CACs followed the trend, which could be rationalized in terms of matching affinities between the cation and the sulfate groups present at the surface of CNCs. From the SAXS measurements it was shown that the density of the aggregates increased with increasing salt concentration and ion valence. In addition, these findings were rationalized by means of simulation, which showed a good correlation with experimental data. The combination of the experimental techniques and the simulations offered insight into interactionaggregation relationship of CNC suspensions, which is of importance for their structural design applications.Electronic supplementary material The online version of this article

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Section: Introductionmentioning

confidence: 99%

Aggregation behavior of aqueous cellulose nanocrystals: the effect of inorganic salts

et al. 2016

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“…They have been applied in the fields of biomedical engineering, food, sensor, packaging, optical and electronic devices, and so on [8][9][10]. Previous reviews have summarized their source, chemistry, and applications [2,[11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. The present review mainly focuses on the advances in preparation of CNCs and CNFs in order to display a clear development direction for the preparation of CNCs and CNFs.…”

Section: Introductionmentioning

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

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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“…Nowadays, such reports and their results can be found in the literature discussing the possible application of more environmentally friendly biopolymers, such as whey proteins, chitosan (Gällstedt et al 2005), starch (Garcia et al 1999) and alginates (Rhim et al 2006). Another, but equally important, reason to conduct such research is to seek out truly environmentally friendly substances, which would make it possible to obtain new paper material properties, while at the same time developing novel composite or hybrid biomaterials (Salas et al 2014;Hubbe et al 2017). Different forms of cellulose, in particular, microfibrillated, microcrystalline cellulose and nanocellulose, are currently among the substances widely studied to meet these objectives (Lavoine et al 2014;Nakagaito and Yano 2005).…”

Section: Introductionmentioning

confidence: 99%

“…Depending on the coating suspension composition, it is possible to improve paper strength, adhesive, printing, barrier and antibacterial properties, control the coefficient of friction and fire retardancy, modify thermal and electrical conductivity, and also to enhance the many different properties of other endproducts (Choi et al 2002;Tracton 2007;Andersson 2008;Gardner et al 2008;Liu et al 2011;Salas et al 2014;Mngomezulu and John 2017). A lot of substances used for coating purposes are of synthetic origin (e.g.…”

Section: Introductionmentioning

confidence: 99%

Regenerated cellulose from N-methylmorpholine N-oxide solutions as a coating agent for paper materials

et al. 2018

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The objective of the presented research was to determine the influence of cellulose coating, obtained from the cellulose solution in N-Methylmorpholine N-oxide (NMMO), on the structural and mechanical properties of paper. The effect of heating time of paper samples coated with cellulose dissolved in NMMO was also investigated. Depending on the heating time of the coating, a continuous or porous layer was obtained. Coating without any heating stage yielded a continuous cellulose layer of hydrophobic properties (higher contact angle in comparison to base paper), and paper of higher smoothness and increased tear resistance. Analysis of the paper samples showed that cellulose coating not only changed the surface properties of paper, but also significantly improved paper strength properties, such as the tensile index, elongation, bursting strength index and double folds number. Despite the process' limitations (e.g. necessity of removing the NMMO), this method can be considered as a novel approach for paper property modification.

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Nanocellulose properties and applications in colloids and interfaces

Cited by 563 publications

References 190 publications

Aggregation behavior of aqueous cellulose nanocrystals: the effect of inorganic salts

Aggregation behavior of aqueous cellulose nanocrystals: the effect of inorganic salts

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

Regenerated cellulose from N-methylmorpholine N-oxide solutions as a coating agent for paper materials

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