Aerogels from crosslinked cellulose nano/micro-fibrils and their fast shape recovery property in water

Zhang, Wei; Zhang, Yaan; Lu, Canhui; Deng, Yulin

doi:10.1039/c2jm30688c

Cited by 226 publications

(170 citation statements)

References 23 publications

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“…It was shown that the addition of the crosslinking agent decreased the thickness swelling amount by more than half. This was attributable to the fact that the reaction between the azetidinium functional group in the crosslinking agent structure and carboxylic groups in CNF results in a water-insoluble network (Li et al 2004;Zhang et al 2012). bioresources.com Amini et al (2017). "Cellulose nanofibril particleboard," BioResources 12(2), 4093-4110.…”

Section: Effects Of Adding a Crosslinking Agentmentioning

confidence: 99%

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Utilization of Cellulose Nanofibrils as a Binder for Particleboard Manufacture

et al. 2017

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Cellulose nanofibrils (CNF) were investigated as a binder in the formulation of particleboard (PB) panels. The panels were produced in four different groups of target densities with varying amounts of CNF binder.The produced panels were then tested to determine the modulus of rupture (MOR), modulus of elasticity (MOE), internal bond (IB), water absorption (WA), and thickness swelling (TS) properties. Density gradients through the thickness of the panels were evaluated using an Xray density profiler. The effect of drying on the strength development and adhesion between CNF and wood particles (WP) was investigated, and the effect of surface roughness on the wood-CNF bonding strength was evaluated through lap shear testing and scanning electron microscopy. It was found that at lower panel densities, the produced samples met the minimum standard values recommended for particleboard panels. Medium-density panels met the standard levels for IB, but they did not reach the recommended values for MOR and MOE. The possible bonding mechanism and panel formation process are discussed in light of microscopic observations and the results of lap shear tests were presented.

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Section: Effects Of Adding a Crosslinking Agentmentioning

confidence: 99%

“…6a) that could be cross-linked with the carboxyl groups (Fig. 6b) on the cellulosic structure of CNF and impart wet-strengthening on the PB structure (Li et al 2004;Zhang et al 2012).…”

Section: Effects Of Adding a Crosslinking Agentmentioning

confidence: 99%

Utilization of Cellulose Nanofibrils as a Binder for Particleboard Manufacture

et al. 2017

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“…Inspired by this idea, creating three-dimensional (3D) nanofibrous aerogels (NFAs) with high continuity and an open-cell cellular structure could be another strategy for achieving promising performance for widespread applications. Several cellulosic materials, including bacterial cellulose fibrils, cellulose nanocrystals and lignocellulose, have recently been used as building blocks and assembled into NFAs [16][17][18] . However, the inherent limits on the diversity of bulk materials, combined with the lack of precise control of the physicochemical and mechanical properties, present major challenges in the synthesis of NFAs that must be addressed before their extensive practical applications.…”

mentioning

confidence: 99%

Ultralight nanofibre-assembled cellular aerogels with superelasticity and multifunctionality

et al. 2014

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Three-dimensional nanofibrous aerogels (NFAs) that are both highly compressible and resilient would have broad technological implications for areas ranging from electrical devices and bioengineering to damping materials; however, creating such NFAs has proven extremely challenging. Here we report a novel strategy to create fibrous, isotropically bonded elastic reconstructed (FIBER) NFAs with a hierarchical cellular structure and superelasticity by combining electrospun nanofibres and the fibrous freeze-shaping technique. Our approach causes the intrinsically lamellar deposited electrospun nanofibres to assemble into elastic bulk aerogels with tunable densities and desirable shapes on a large scale. The resulting FIBER NFAs exhibit densities of 40.12 mg cm À 3 , rapid recovery from deformation, efficient energy absorption and multifunctionality in terms of the combination of thermal insulation, sound absorption, emulsion separation and elasticity-responsive electric conduction. The successful synthesis of such fascinating materials may provide new insights into the design and development of multifunctional NFAs for various applications.

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“…MFC has been widely investigated recently due to its sustainable, renewable, and biocompatible nontoxic properties for relatively high physical-chemical stability materials [1][2][3]. These aerogels are based on the hydrogen bond formation between MFC [4]. Unfortunately, these hydrogen bonds can be easily destroyed by immersing the aerogels in water, which limited the application of the aerogels.…”

Section: Introductionmentioning

confidence: 99%

“…Chemical-crosslinking affords a method for the preparation of cellulose aerogels with high mechanical properties [4][5][6]. Although many efforts have been carried out for the improvement of the mechanical properties of cellulose aerogels, the substances that can provide safe, renewable, and biocompatible nontoxic are more desirable.…”

Section: Introductionmentioning

confidence: 99%

MFC-Chitosan aerogel for heavy metal ions separation

Jin¹,

Kang²

2016

Proceedings of the 2016 5th International Conference on Advanced Materials and Computer Science

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Abstract. Mirco-fibrillated cellulose (MFC) aerogel was prepared by adding chitosan as crosslinker. The MFC-chitosan aerogel was used as heavy metal ions absorbent. The results showed that the aerogel had good absorption capacity of over 200mg/g for all 4 kinds of heavy metal ions, Cd2+,Zn2+,Pb2+ and Cr6+ in the initial concentration range of 50-1000mg/L. The aerogel had little effect on contact time, but showed dependence on ion initial concentration. The reinforced MFC aerogel is a novel and attractive absorbent for heavy metal ions separation.

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Aerogels from crosslinked cellulose nano/micro-fibrils and their fast shape recovery property in water

Cited by 226 publications

References 23 publications

Utilization of Cellulose Nanofibrils as a Binder for Particleboard Manufacture

Utilization of Cellulose Nanofibrils as a Binder for Particleboard Manufacture

Ultralight nanofibre-assembled cellular aerogels with superelasticity and multifunctionality

MFC-Chitosan aerogel for heavy metal ions separation

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