Orienting Cellulose Nanocrystal Functionalities Tunes the Wettability of Water-Cast Films

Bruel, Charles; Queffeulou, Salomé; Carreau, Pierre J.; Tavares, Jason Robert; Heuzey, Marie‐Claude

doi:10.1021/acs.langmuir.0c01799

Cited by 14 publications

(25 citation statements)

References 47 publications

(146 reference statements)

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“…The results showed that the CNCs’ film had strong hydrophilicity. Bruel et al [ 62 ] reported similar results. The static WCA of the film prepared from compressed CNC particles was 45°.…”

Section: Resultssupporting

confidence: 53%

Preparation of Cellulose Nanocrystals from Jujube Cores by Fractional Purification

Wang

Guo

et al. 2022

Molecules

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Jujube cores are fiber-rich industrial waste. Dewaxing, alkali treatment, bleaching, and sulfuric acid hydrolysis were used to generate cellulose nanocrystals (CNCs) from the jujube cores in this study. The morphological, structural, crystallinity, and thermal properties of the fibers were investigated using FE-SEM, TEM, AFM, FT-IR, XRD, and TGA under various processes. CNCs’ zeta (ζ) potential and water contact angle (WAC) were also investigated. The findings demonstrate that non-fibrous components were effectively removed, and the fiber particles shrunk over time because of many activities. CNCs had a rod-like shape, with a length of 205.7 ± 52.4 nm and a 20.5 aspect ratio. The crystal structure of cellulose Iβ was preserved by the CNCs, and the crystallinity was 72.36%. The temperature of the fibers’ thermal degradation lowered during the operations, although CNCs still had outstanding thermal stability (>200 °C). Aside from the CNCs, the aqueous suspension of CNCs was slightly agglomerated; thus, the zeta (ζ) potential of the CNCs’ suspension was −23.72 ± 1.7 mV, and the powder had high hydrophilicity. This research will be valuable to individuals who want to explore the possibility for CNCs made of jujube cores.

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Section: Resultssupporting

confidence: 53%

Preparation of Cellulose Nanocrystals from Jujube Cores by Fractional Purification

Wang

Guo

et al. 2022

Molecules

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“…This has been shown previously in the literature not only for surfaces focusing on superhydrophocity 42 but also surfaces with contact angles of <90°. 43 It is also found that contact angle on SPNC surfaces is shown to be more sensitive to surface tension in the hydrophobic (90° < θ < 150°) region than in the superhydrophobic region (150° < θ < 180°). Furthermore, the surface tension determination on contact angle is consistent with varying aqueous solutions (EtOH and PEG).…”

Section: Resultsmentioning

confidence: 95%

Surface Tension and Viscosity Dependence of Slip Length over Irregularly Structured Superhydrophobic Surfaces

2022

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A comprehensive understanding of the slip phenomenon on liquid/solid interfaces is essential for multiple real-world applications of superhydrophobic materials, especially those involving drag reduction. In the current contribution, the so-called “slip-length” on an irregularly structured superhydrophobic surface was systematically evaluated, with respect to varying liquid surface tension and viscosity. The superhydrophobic polymer–nanoparticle composite (SPNC) material used exhibits a dual-scale surface roughness and was fabricated via coating a surface with a mixture of polydimethylsiloxane solution and functionalized silica particles. A cone-and-plate rheometric device was employed to quantify the slip length. To independently study the impact of surface tension and viscosity, three types of aqueous solutions were used: sodium dodecyl sulfate, ethanol, and polyethylene glycol. Our experimental results demonstrate that a decreasing surface tension results in a decreasing slip length when the fluid viscosity is held constant. Meanwhile, the slip length is shown to increase with increasing viscosity when the surface tension of the various liquids is matched to isolate effects. The study reveals a linear relationship between slip length and both capillary length and viscosity providing a reference to potentially predict the degree of achievable drag reduction for differing fluids on SPNC surfaces.

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“…A recent work investigates this topic and nicely quantify several interfacial and interaction energies for CNCs reorientation at both solid and liquid interfaces. [30] Yet, the work only speculates details of interfacial alignment of CNCs and several convincingly conformations exist and support the broad values of experimental results.…”

Section: Cncbased Pickering Emulsionsmentioning

confidence: 73%

Section: The Complex Role Of Hydroxyls: the Love-hate Relationship Between Nanocellulose And Watermentioning

confidence: 99%

“…The amphiphilic structure of NC eases the emulsification properties by allowing the CNC to reorient into the most energetical favorable condition at the liquid-liquid interface and broaden the possibility to effectively emulsify the system. [30,41] CNCs have been used also to inhibit emulsions for example to remove water from oil [176,177] ; in this case, the greater affinity of CNC with the water phase is used to destabilize unwanted emulsion and recover a purified product with limited use of chemical and energy-intensive treatments.…”

Section: Cncbased Pickering Emulsionsmentioning

confidence: 99%

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Nanocellulose and Its Interface: On the Road to the Design of Emerging Materials

Bettotti

Scarpa

2021

Adv Materials Inter

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The interest in the hierarchical structure, the multi-scale organization, and the properties of cellulose has long been the prerogative of botanists and plant physiologists. The last decade has witnessed the potential of a top-down approach to take apart cellulose-based raw materials into their micro-and nano-sized building blocks and to use them to design and fabricate functional materials and devices with new and, in some cases, outstanding properties. At present, cellulose is not only one of the main constituents of the plant and bacterial kingdom, it is also an important component of materials and manufactured goods, such as paper, textiles, or food additives. Depending on the extent of the scale down process, the fragments have variable size and in this review are collectively indicated as nanocellulose (NC). Although the interfacial properties of NC are always mentioned and recognized to contribute significantly to NC behavior, there is still room for reviewing the several recent reports highlighting the role of the interaction at the interface. In this scenario, the interface driven performances of some advanced NC-based materials are gaining in importance. This review aims at providing an overview of the most advanced of them, such as the Pickering emulsions, the supercapacitors, the drug crystallizing capsules, the nanowood.In nature, cellulose is synthesized by plants and also by some bacterial strains which can polymerize the glucose residues into linear β − 1, 4 −glucan chains. Once extracellularly secreted, the chains assemble, crystallize (the degree of crystallinity is up to 90%), and form nanostructures called bacterial nanocellulose (BNC) which in turn assemble forming microfibrils. Different from plant tissues where cellulose is embedded in a heterogeneous macrostructure, bacterial secretions are made of pure cellulose and are considered an excellent source of NC. [2] However, due to the large availability of cellulose from wood or other lowcost vegetable sources such as agriculture wastes, plant cellulose is the most common material for NC production. Several strategies for the preparation of NC have been reported. [3] A popular production route uses a pretreatment to introduce negative charges by 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) mediated oxidation followed by a mechanical disintegration. [4] The behavior of NC has been largely studied, and it is well assessed that when NC colloidal suspensions are dried, they form flexible and transparent films with multifunctional properties. [5] These properties, first of all, depend on the degree of fibrillation of the colloidal NC. [6] Conversely, in aqueous solutions, NC Nanocellulose has several unique properties that render it a versatile mate rial with possible uses in a broad spectrum of applications. Nanocellulose is proved to form stable colloidal suspensions with interesting rheological properties, assemble in soft hydrogels of tunable porosity, compact dried films. Suggested or already current applications of these systems are in the f...

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Orienting Cellulose Nanocrystal Functionalities Tunes the Wettability of Water-Cast Films

Cited by 14 publications

References 47 publications

Preparation of Cellulose Nanocrystals from Jujube Cores by Fractional Purification

Preparation of Cellulose Nanocrystals from Jujube Cores by Fractional Purification

Surface Tension and Viscosity Dependence of Slip Length over Irregularly Structured Superhydrophobic Surfaces

Nanocellulose and Its Interface: On the Road to the Design of Emerging Materials

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