Holocellulose Nanocrystals: Amphiphilicity, Oil/Water Emulsion, and Self-Assembly

Jiang, Feng; Hsieh, You‐Lo

doi:10.1021/acs.biomac.5b00240

Cited by 58 publications

(29 citation statements)

References 61 publications

(106 reference statements)

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“…The effectiveness of CNCs as stabilizers depends on factors such as particle size, inter-particle interactions, and the wettability of the particles. As hydrophilic CNCs tend to form oil-in-water emulsions [34], in order to produce water-in-oil emulsions, CNCs ought to be sufficiently hydrophobized to bend the interface toward the water phase. However, it is interesting to find that a water-in-oil emulsion was successfully prepared in this work through the use of neat CNCs without modification.…”

Section: Resultsmentioning

confidence: 99%

Nanocellulose Stabilized Pickering Emulsion Templating for Thermosetting AESO Nanocomposite Foams

et al. 2018

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Emulsion templating has emerged as an effective approach to prepare polymer-based foams. This study reports a thermosetting nanocomposite foam prepared by nanocellulose stabilized Pickering emulsion templating. The Pickering emulsion used as templates for the polymeric foams production was obtained by mechanically mixing cellulose nanocrystals (CNCs) water suspensions with the selected oil mixtures comprised of acrylated epoxidized soybean oil (AESO), 3-aminopropyltriethoxysilane (APTS), and benzoyl peroxide (BPO). The effects of the oil to water weight ratio (1:1 to 1:3) and the concentration of CNCs (1.0–3.0 wt %) on the stability of the emulsion were studied. Emulsions were characterized according to the emulsion stability index, droplet size, and droplet distribution. The emulsion prepared under the condition of oil to water ratio 1:1 and concentration of CNCs at 2.0 wt % showed good stability during the two-week storage period. Nanocomposite foams were formed by heating the Pickering emulsion at 90 °C for 60 min. Scanning electron microscopy (SEM) images show that the foam has a microporous structure with a non-uniform cell size that varied from 0.3 to 380 μm. The CNCs stabilized Pickering emulsion provides a versatile approach to prepare innovative functional bio-based materials.

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Section: Resultsmentioning

confidence: 99%

Nanocellulose Stabilized Pickering Emulsion Templating for Thermosetting AESO Nanocomposite Foams

et al. 2018

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“…Therefore, other types of acids such as hydrochloric, phosphoric, phosphotungstic, and organic acids have also been explored to generate more thermally stable CNCs. Besides, due to the preferential hydrolysis of amorphous regions to soluble products that are impossible to recover, acid hydrolysis generally leads to low yields of less than 30% but very high crystallinity approaching 90% …”

Section: Hierarchical Mesostructures From Wood‐based Nanomaterialsmentioning

confidence: 99%

Wood‐Based Nanotechnologies toward Sustainability

et al. 2017

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to alleviate our reliance on petroleum-based materials. Beyond abundance and biodegradability, wood is also a carbon-neutral material that does not contribute net CO 2 increase due to the cyclic carbon fixation during photosynthesis and release during degradation. Given these advantages, wood has been considered as a potential replacement for petroleum-based materials to support continued sustainable growth.Throughout history, wood has been the primary material for tools, buil dings, and fuels that support human activity. However, the functions of wood have been limited by its intrinsic properties including bulkiness, low mechanical properties, nontransparency, and nonconductivity. Therefore, it has been gradually replaced by other materials, such as synthetic polymers, glass, and metals. With the advancement of nanotechnology, nanomaterials derived from wood have been successfully synthesized and are well suited to expand its application to more emerging areas such as the environment, energy, and biomedicine. Therefore, given the rapid expansion of bio-based nanotechnologies and the stringent demands for sustainable development, it is pressing to revisit wood-based materials as sustainable sources to satisfy our continuous needs, alleviating our fear of the depletion of nonrenewable natural resources.Here, we cover the most recent advances in designing hierarchical structures using wood and wood-based nanomaterials, including both the bottom-up assembly from nanocellulose into varied 1D, 2D, and 3D forms and the recently developed top-down approaches that introduce novel functionalities to existing wood hierarchical structures. Progress in the application of these hierarchical structures to emerging sustainable areas will be reviewed to emphasize how these traditional woody materials, now transformed by nanotechnologies, may be used to improve the sustainability of biodegradable flexible electronics, natural energy harvesting, thermal regulation in green buildings, sustainable energy storage, environmental remediation, and efficient solar steam generation toward desalination. To date, several very important reviews on the structures and applications of wood-and cellulose-based materials have been published, and due to the limited space available here, inclusion of comprehensive knowledge on all these aspects is infeasible. For more detailed reviews on each aspect, the readers will be directed to other more comprehensive or specific reviews. [1][2][3][4][5][6][7] The primary focus here will be placed on how these bio-based materials could potentially With over 30% global land coverage, the forest is one of nature's most generous gifts to human beings, providing shelters and materials for all living beings. Apart from being sustainable, renewable, and biodegradable, wood and its derivative materials are also extremely fascinating from a materials aspect, with numerous advantages including porous and hierarchical structure, excellent mechanical performance, and versatile chemistry. Here, strategies for designing n...

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“…30 GPa and 270-950 GPa for tensile strength and Young's modulus, respectively). 43,44 The unique surface-active characteristics of CNFs have enabled their function as emulsifiers 45 as well as exhibited amphiphilicity when assembled into aerogels. 49 While biological materials, such as silk fibroin 50 and lignin, 51 have shown to aid in assembling graphene oxide and carbon nanotubes and CNFs have been used to stabilize conducting materials, 52 carbon nanomateris, 53 and graphene, 54 the potential of CNFs in exfoliating or peeling graphene from bulk graphite crystals in aqueous medium had not been reported.…”

Section: Introductionmentioning

confidence: 99%

Aqueous exfoliated graphene by amphiphilic nanocellulose and its application in moisture-responsive foldable actuators

Hsieh

2019

Nanoscale

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Holocellulose Nanocrystals: Amphiphilicity, Oil/Water Emulsion, and Self-Assembly

Cited by 58 publications

References 61 publications

Nanocellulose Stabilized Pickering Emulsion Templating for Thermosetting AESO Nanocomposite Foams

Nanocellulose Stabilized Pickering Emulsion Templating for Thermosetting AESO Nanocomposite Foams

Wood‐Based Nanotechnologies toward Sustainability

Aqueous exfoliated graphene by amphiphilic nanocellulose and its application in moisture-responsive foldable actuators

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