Nanocellulose nanocomposite aerogel towards efficient oil and organic solvent adsorption

Gu, Hongbo; Gao, Chong; Zhou, Xiaomin; Du, Ai; Naik, Nithesh; Guo, Zhanhu

doi:10.1007/s42114-021-00289-y

Cited by 155 publications

(37 citation statements)

References 46 publications

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“…41 Besides, composite aerogels of nanocellulose with other material were constructed via the Pickering emulsion route without any chemical reaction, with highly improved mechanical properties. [47][48][49][50] Nevertheless, many challenges attributed to structural controllability persist, self-organization of nanocelluloses to scaffolds of ultrafine arrays are essential for their performance in adsorption [51][52][53][54][55][56][57][58] and insulation. As such, extensive efforts should be channeled toward developing a facile and effective strategy for constructing a 3D network with superior surface chemistry and thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Pickering emulsion templated strategy in composite aerogels with hierarchical porous structure improves thermal insulation and diphenylamine adsorption

Liu

Hua

et al. 2022

J of Applied Polymer Sci

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A facile Pickering emulsion templated approach is used to achieve nanocelluloses (NCs)/poly(aryl ether ketone) (PAEK) composite aerogels with low density and hierarchical porous structure. In this article, we evaluate the factors including water-oil volume ratio, PAEK loading and NCs species to unravel the impact of fiber morphology on the formation and properties of the Pickering emulsions and aerogels. The results show both cellulose nanofibrils (CNF) and microfibrous cellulose (MFC) display excellent performance in stabilizing Pickering emulsions. Besides, the NCs/PAEK composite aerogels reveal a nanonet constructed porous network with excellent properties of thermal insulation. The lowest thermal conductivity of 17.8 mWÁm À1 ÁK À1 is obtained for the CNF/PAEK composite aerogel. To our knowledge, this is one of the most efficient thermal insulators in the reported NCs-based aerogels. Additionally, the NCs/PAEK composite aerogels demonstrate an efficiency of 98.1% in diphenylamine adsorption of water. These findings reveal a potential application of NCs/PAEK composite aerogels in adsorbent and thermal insulators in chemical industries and the construction sector.

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Section: Introductionmentioning

confidence: 99%

Pickering emulsion templated strategy in composite aerogels with hierarchical porous structure improves thermal insulation and diphenylamine adsorption

Liu

Hua

et al. 2022

J of Applied Polymer Sci

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“…Because excellent thermal stability plays a key role in applications of composite materials [ 35 ], the thermal stability of samples was determined by TGA analysis in air, as shown in Figure 8 . The thermal degradation of SCAB 1–12 took place in three steps similar weight-loss steps: 30–250 °C, 250–620 °C, and 620–700 °C ( Figure 8 ).…”

Section: Resultsmentioning

confidence: 99%

Robust SiO2–Al2O3/Agarose Composite Aerogel Beads with Outstanding Thermal Insulation Based on Coal Gangue

et al. 2022

Gels

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Advanced SiO2–Al2O3 aerogel materials have outstanding potential in the field of thermal insulation. Nevertheless, the creation of a mechanically robust and low-cost SiO2–Al2O3 aerogel material remains a considerable challenge. In this study, SiO2–Al2O3 aerogel based on coal gangue, which is a type of zero-cost inorganic waste, was constructed in porous agarose aerogel beads, followed by simple chemical vapor deposition of trimethylchlorosilane to fabricate SiO2–Al2O3/agarose composite aerogel beads (SCABs). The resulting SCABs exhibited a unique nanoscale interpenetrating network structure, which is lightweight and has high specific surface area (538.3 m2/g), hydrophobicity (approximately 128°), and excellent thermal stability and thermal insulation performance. Moreover, the compressive strength of the SCABs was dramatically increased by approximately a factor of ten compared to that of native SiO2–Al2O3 aerogel beads. The prepared SCABs not only pave the way for the design of a novel aerogel material for use in thermal insulation without requiring expensive raw materials, but also provide an effective way to comprehensively use coal gangue.

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“…As one of the three major components of plant biomass, cellulose has attracted much attention. Cellulose can be used to make paper, paperbased materials, hydrogels, and aerogel [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39]. Besides, cellulose and its derivatives can be applied in the field of electrical materials [40][41][42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%

Effects of different amounts of cellulase on the microstructure and soluble substances of cotton stalk bark

Xie

Tian

Liu

et al. 2022

Adv Compos Hybrid Mater

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There are plant cuticle and complex cell walls on the outer surface of cotton stalk bark (CSB), which reduce the efficiency of liquid penetration of CSB. To increase the permeability of liquids, these barriers need to be broken. Cellulase can selectively hydrolyze cellulose into glucose, and its action conditions are mild. Therefore, cellulase treatment is one of the excellent ways to break the CSB liquid permeation barrier. This experiment studied the effects of different amounts of cellulase treatment on the enzymatic hydrolysis products and surface of CSB. Scanning electron microscopy (SEM) and nano-CT were used to observe the changes in the microscopic morphology of CSB. Ion chromatography and an ultraviolet–visible spectrophotometer were used to determine the dissolution of CSB. The results showed that the cuticle of CSB treated with cellulase was broken, and the cell wall of phloem fibers became thinner, which increased the accessibility of liquid. The content of monosaccharide and lignin in CSB treatment solution increased with the increase of cellulase dosage. Correspondingly, the proportion of polysaccharides on the outer surface of CSB continued to decline and eventually stabilized. These experimental results can provide a reference for improving the permeability of natural fibers and the subsequent treatment effects of biomass products. Graphical abstract The pretreatment of cotton stalk barks with cellulase destroyed the dense protective structure of cell wall, and the content of monosaccharide and lignin in the treated solution increased with the increase of cellulase dosage.

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Nanocellulose nanocomposite aerogel towards efficient oil and organic solvent adsorption

Cited by 155 publications

References 46 publications

Pickering emulsion templated strategy in composite aerogels with hierarchical porous structure improves thermal insulation and diphenylamine adsorption

Pickering emulsion templated strategy in composite aerogels with hierarchical porous structure improves thermal insulation and diphenylamine adsorption

Robust SiO2–Al2O3/Agarose Composite Aerogel Beads with Outstanding Thermal Insulation Based on Coal Gangue

Effects of different amounts of cellulase on the microstructure and soluble substances of cotton stalk bark

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