3D Hollow Xerogels with Ordered Cellulose Nanocrystals for Tailored Mechanical Properties

Yang, Yang; Huang, Heqin; Xu, Dan; Wang, Xiaojie; Chen, Ye; Wang, Xiaohui; Zhang, Kai

doi:10.1002/smll.202104702

Cited by 8 publications

(3 citation statements)

References 25 publications

(28 reference statements)

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“…Similar to hollow xerogels, CNC may also make them. In ref , sophisticated 3D architectures were created from dynamic hydrogels by mechanically stretching and drying them. These complex 3D structures were pseudo catenoid hollow xerogels with aligned CNCs.…”

Section: Application Of Afm On Cncmentioning

confidence: 99%

Cellulose Nanocrystals Examined by Atomic Force Microscopy: Applications and Fundamentals

Moud

2022

ACS Food Sci. Technol.

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Cellulose nanocrystals (CNCs) are nanoscale particles with huge surface areas, excellent mechanical properties, and the ability to develop tunable surface chemistry, thus allowing them to be mixed into a wide range of matrices. Using atomic force microscopy (AFM), we highlight recent developments in the microstructural characterization of CNC particles in various shapes at both particle and organization scales. Considering new uses for CNC suspensions and gels and given the considerable potential of CNC-based products in medicinal, energy, cosmetics, filtration, and food applications, leveraging existing state-of-the-art characterization technologies such as AFM to improve CNC-produced properties cannot be ruled out. AFM may be used as a probe to disclose more intimate information about CNCs and can show modulus, size, and morphology in comparison to other characterization tools. AFM based on the literature review here was found to be a good assessment tool to verify the state of interaction, the adhesion strength of certain particles or chemicals, and the mechanical properties of CNCs. Thus, in tandem with other technologically advanced characterization tools, knowledge provided here for proper assessment of CNCs is necessary. Based on the AFM application currently widespread on CNCs, it appears that more research efforts are needed to provide additional cues regarding CNC individual states or the organized state (isotropic or liquid crystalline) for future sustainable, ecofriendly product designs based on CNCs.

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Section: Application Of Afm On Cncmentioning

confidence: 99%

Cellulose Nanocrystals Examined by Atomic Force Microscopy: Applications and Fundamentals

Moud

2022

ACS Food Sci. Technol.

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“…[21][22][23][24] Cellulose nanofibrils (CNFs), a plant-based renewable biomass that possesses a unique nanoscale structure with a high aspect ratio and specific surface area, also has distinguishable mechanical properties, biocompatibility, and a tunable surface charge; thus, they have a key role in the "dynamic crosslinking network." [25][26][27] For example, using CNFs, polyvinyl alcohol (PVA), and NaCl, Jiang and co-workers developed a double network ICH-based sensor that showed high stretchability (>660%), tensile strength (2.1 MPa), and toughness (5.25 MJ m −3 ) along with stable ionic conductivity (3.2 S m −1 ) under large deformation. [28] Ge and co-workers prepared a highly stretchable (>731%) and strong (250 KPa) interpenetrating polymer network ICH by acrylamide (AM) polymerization in the presence of CNF and LiCl, which showed good potential for use as a new generation of e-skins.…”

Section: Introductionmentioning

confidence: 99%

Super Stretchable, Self‐Healing, Adhesive Ionic Conductive Hydrogels Based on Tailor‐Made Ionic Liquid for High‐Performance Strain Sensors

Yao

Zhang

Qian

et al. 2022

Adv Funct Materials

177

143

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Ionic conductive hydrogels (ICHs) integrate the conductive performance and soft nature of tissue‐like materials to imitate the features of human skin with mechanical and sensory traits; thus, they are considered promising substitutes for conventional rigid metallic conductors when fabricating human‐motion sensors. However, the simultaneous incorporation of excellent stretchability, toughness, ionic conductivity, self‐healing, and adhesion via a simple method remains a grand challenge. Herein, a novel ICH platform is proposed by designing a phenylboronic acid‐ionic liquid (PBA‐IL) with multiple roles that simultaneously realize the highly mechanical, electrical, and versatile properties. This elaborately designed semi‐interpenetrating network ICH is fabricated via a facile one‐step approach by introducing cellulose nanofibrils (CNFs) into the PBA‐IL/acrylamide cross‐linked network. Ingeniously, the dynamic boronic ester bonds and physical interactions (hydrogen bonds and electrostatic interactions) of the cross‐linked network endow these hydrogels with remarkable stretchability (1810 ± 38%), toughness (2.65 ± 0.03 MJ m−3), self‐healing property (92 ± 2% efficiency), adhesiveness, and transparency. Moreover, the construction of this material shows that CNFs can synergistically enhance mechanical performance and conductivity. The wide working strain range (≈1000%) and high sensitivity (GF = 8.36) make this ICH a promising candidate for constructing the next generation of gel‐based strain sensor platforms.

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“…[8] Cellulose nanocrystal (CNC) is a renewable resource derived from lignocellulosic materials, known for its optical permeability, biocompatibility, and unique self-assembly properties. [9][10][11][12][13] Hydrolysis by sulfuric acid can be used to hydrolyze the disordered regions of cellulose, while retaining the ordered crystalline parts to form CNC. [14,15] As evaporation-induced self-assembly (EISA) reaches the critical concentration, the nanorods in the CNC suspension are orientated and ordered along the long-axis direction.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Flexible CNC‐Based Chiral Nematic Film Materials

Zou,

Xue,

et al. 2023

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Cellulose nanocrystal (CNC) is a renewable resource derived from lignocellulosic materials, known for its optical permeability, biocompatibility, and unique self‐assembly properties. Recent years have seen great progresses in cellulose nanocrystal‐based chiral photonic materials. However, due to its inherent brittleness, cellulose nanocrystal shows limitations in the fields of flexible materials, optical sensors and food freshness testing. In order to solve the above limitations, attempts have been made to improve the flexibility of cellulose nanocrystal materials without destroying their structural color. Despite these progresses, a systematic review on them is lacking. This review aims to fill this gap by providing an overview of the main strategies and the latest research findings on the flexibilization of cellulose nanocrystal‐based chiral nematic film materials (FCNM). Specifically, typical substances and methods used for their preparation are summarized. Moreover, different kinds of cellulose nanocrystal‐based composites are compared in terms of flexibility. Finally, potential applications and future challenges of flexible cellulose nanocrystal‐based chiral nematic materials are discussed, inspiring further research in this field.

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3D Hollow Xerogels with Ordered Cellulose Nanocrystals for Tailored Mechanical Properties

Cited by 8 publications

References 25 publications

Cellulose Nanocrystals Examined by Atomic Force Microscopy: Applications and Fundamentals

Cellulose Nanocrystals Examined by Atomic Force Microscopy: Applications and Fundamentals

Super Stretchable, Self‐Healing, Adhesive Ionic Conductive Hydrogels Based on Tailor‐Made Ionic Liquid for High‐Performance Strain Sensors

Recent Advances in Flexible CNC‐Based Chiral Nematic Film Materials

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