Ultrasoft gelatin aerogels for oil contaminant removal

Wang, Juan; Zhao, Dan; Shang, Ke; Wang, Yutao; Ye, Dandan; Kang, A-Hui; Wang, Liao; Wang, Yu‐Zhong

doi:10.1039/c6ta03146c

Cited by 87 publications

(46 citation statements)

References 50 publications

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“…Considering the natural abundance, renewability, environmental friendliness, and low cost, biomass has been regarded as a renewable and sustainable carbon precursor for fabricating carbon aerogels. Up to now, several biomass‐derived carbon aerogels have been successfully developed from gelatin,16 winter melon,17 protein,18 bacterial cellulose,19 and raw cotton 20. However, those carbon aerogels show poor compressibility, elasticity, and fatigue resistance owing to the intrinsic random porous architecture and severe volume shrinkage at annealing or carbonization.…”

Section: Introductionmentioning

confidence: 99%

Wood‐Derived Lightweight and Elastic Carbon Aerogel for Pressure Sensing and Energy Storage

Chen

Zhuo

et al. 2020

Adv Funct Materials

233

142

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Lightweight and elastic carbon materials have attracted great interest in pressure sensing and energy storage for wearable devices and electronic skins. Wood is the most abundant renewable resource and offers green and sustainable raw materials for fabricating lightweight carbon materials. Herein, a facile and sustainable strategy is proposed to fabricate a wood-derived elastic carbon aerogel with tracheid-like texture from cellulose nanofibers (CNFs) and lignin. The flexible CNFs entangle and assemble into an interconnected framework, while lignin with high thermal stability and favorable stiffness prevents the framework from severe structural shrinkage during annealing. This strategy leads to an ordered tracheid-like structure and significantly reduces the thermal deformation of the CNFs network, producing a lightweight and elastic carbon aerogel. The wood-derived carbon aerogel exhibits excellent mechanical performance, including high compressibility (up to 95% strain) and fatigue resistance. It also reveals high sensitivity at a wide working pressure range of 0-16.89 kPa and can detect human biosignals accurately. Moreover, the carbon aerogel can be assembled into a flexible and free-standing all-solid-state symmetric supercapacitor that reveals satisfactory electrochemical performance and mechanical flexibility. These features make the wood-derived carbon aerogel highly attractive for pressure sensor and flexible electrode applications.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adfm.201910292. important applications in wearable sensors, electronic skins, and flexible energy storage devices. Although carbon aerogels with good mechanical performances can be achieved from nanocarbon unites, their carbon precursors are nonrenewable, and the synthesis process of CNT, graphene, or their aerogels is high-cost and complicated.Considering the natural abundance, renewability, environmental friendliness, and low cost, biomass has been regarded as a renewable and sustainable carbon precursor for fabricating carbon aerogels. Up to now, several biomass-derived carbon aerogels have been successfully developed from gelatin, [16] winter melon, [17] protein, [18] bacterial cellulose, [19] and raw cotton. [20] However, those carbon aerogels show poor compressibility, elasticity, and fatigue resistance owing to the intrinsic random porous architecture and severe volume shrinkage at annealing or carbonization. Wood, as one of the most abundant biomass resources, demonstrates hierarchical tracheid structure that is composed of CNFs and amorphous matrix (lignin and hemicelluloses). [21] Owing to the compact structure (large amounts of additives and various interaction among tracheids or CNFs), natural wood is rigid and the tracheids are hard to be compressed and easily collapsed. Therefore, fabricating compressible and elastic conductive carbon aerogel from original wood tracheids is challenging. To solve this problem, Hu et al. [22] put forward a "top-down" stra...

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Section: Introductionmentioning

confidence: 99%

Wood‐Derived Lightweight and Elastic Carbon Aerogel for Pressure Sensing and Energy Storage

Chen

Zhuo

et al. 2020

Adv Funct Materials

233

142

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“…It concludes that the storage modulus responses are more elastic at high frequency. [ 37 ] The difference in storage modulus is visualized due to the base catalyst (urea content) and precursor (MTMS) quantity variation in different specimens. After 24‐h aging at 70°C, the difference in the storage modulus pattern was M 10 U 2 > M 8 U 2 > M 6 U 2 , as shown in Figure 1(B).…”

Section: Resultsmentioning

confidence: 99%

The role of rheological premonitory of hydrogels based on cellulose nanofibers and polymethylsilsesquioxane on the physical properties of corresponding aerogels

Gupta

Pandey

Gaikwad

et al. 2021

Polymer Engineering & Sci

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Cellulose nanofibers (CNFs) and polymethylsilsesquioxane (PMSQ)‐based aerogels (CNF/PMSQ aerogels) have been prepared by the sol–gel method. The extraction of CNFs from pine wood and formation of composite aerogel with PMSQ were confirmed by Fourier transform infrared spectroscopic and field emission scanning electron microscopic analyses. The rheological premonitory of hydrogel has been performed to predict the physical properties (i.e., density, mechanical properties) of aerogels. The variation in the precursor (methyltrimethoxysilane [MTMS]) and urea content has shown a considerable effect on the storage modulus and phase angle of the hydrogel. The variation in urea content showed a 4–8% increment in the density with a pronounced difference in aerogel's morphology. The increment in the MTMS concentration demonstrated a 10–20% enhancement in density with a minor change in morphology. The van Gurp–Palmen plot of hydrogel has represented a relationship between complex modulus and phase angle. This study establishes that hydrogel's premonitory analysis could compare aerogel's physical properties without going through drying and further analysis.

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“…48 In our case, there are two options for crosslinking. On the one hand, gelatin can be crosslinked in the presence of formaldehyde, 23 and NaCMC by adding N,N 0 -methylenebisacrylamide. 49 Our results have shown that water-insoluble swollen aerogels can be produced in the presence of bisacrylamide.…”

Section: Crosslinked Aerogelsmentioning

confidence: 99%

“…Both features are important for different applications such as spilled oil sorption and separation processes. 12,23 Therefore, a hierarchical porous structure with mesoporous and macroporous compartments is needed, which cannot be obtained by a classical freeze-drying process of a hydrogel. Emulsion-based porous systems are of interest in this context.…”

Section: Introductionmentioning

confidence: 99%