Large-sized graphene oxide as bonding agent for the liquid extrusion of nanoparticle aerogels

Zhang, Songdi; Zhao, Kuimin; Zhao, Jinliang; Liu, Haihui; Chen, Xilei; Yang, Jinglei; Bao, Chenlu

doi:10.1016/j.carbon.2018.04.070

Cited by 17 publications

(8 citation statements)

References 53 publications

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“…It is challenging to assemble those nanoparticles, wherein their surface lacks abundant polar functional groups in the aerogels, as the interface interactions among nanoparticles are not strong enough to maintain aerogel structures. Recently, Zhang et al 135 introduced a liquid extrusion method as a perfect solution to this challenge, which employed liquid extrusion devices for precisely assembling large-sized graphene oxide and only with a small amount of carbon platelets. According to liquid extrusion method, the wide diversity of nanoparticles, containing a few polar functional groups, was assembled into a porous structure with tailored dimensions and shape even when there are two different types of nanoparticle in the structure, such as graphene, clay nanosheets, boron nitride nanosheets, and CNTs.…”

Section: Carbon-based Aerogelsmentioning

confidence: 99%

Nanostructure of Aerogels and Their Applications in Thermal Energy Insulation

Noroozi

Panahi‐Sarmad

Abrisham

et al. 2019

ACS Appl. Energy Mater.

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The recent global energy context has been recognized as evidence for the need to reduce our energy consumption, to prolong fossil fuel supplies and minimize shortage, and to decelerate greenhouse gas transpiration. Over the past few years, using an insulator and decreasing its thermal conductivity have been recognized as the most effective way to reduce energy consumption. Aerogels as superinsulating materials permit reduction of the heat exchange between two environments while producing facile sol−gel and diverse drying routes. Aerogels have intrigued scientists and engineers due to their unique nanocharacteristics, such as low density, fine internal void spaces, and openpore geometry, which originate from sol particles in a 3D random network. Noteworthy are aerogel-based materials that have a supreme potential as thermal insulation owing to their very low thermal conductivity based on trapped air in the meso-/ nanoporous structure. Indeed, aerogels have great appeal in terms of their thermal efficiency, producing simplicity and performance reliability as compared with a traditional insulator. In this work, we will review the main milestones along with the concept of aerogels and then discuss some new trends, strategies, and opportunities in employing various morphological and nanostructural control methods to improve the performance of aerogels, especially enhancing insulation efficiency or decreasing thermal conductivity. The focus will be on (I) tailoring the porous structure of a carbon-based aerogel such as graphene oxide and reduced graphene oxide to accommodate high thermal behavior and (II) designing strategies to achieve intrinsically superinsulating materials in synthesized polymer and bio-based materials, with/without embedding an additional component.

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Section: Carbon-based Aerogelsmentioning

confidence: 99%

Nanostructure of Aerogels and Their Applications in Thermal Energy Insulation

Noroozi

Panahi‐Sarmad

Abrisham

et al. 2019

ACS Appl. Energy Mater.

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“…The density is about 1.3 g/cm 3 for GO and 1.4 g/cm 3 for PVC, respectively. GO loses 10% to 15% weight after 170°C thermal treatment . Based on these data, we calculate that the graphene loading in PVC/graphene/PVC laminate is smaller than 6 ppm.…”

Section: Resultsmentioning

confidence: 91%

“…We also investigated the graphene concentration in the PVC/ 25 Based on these data, we calculate that the graphene loading in PVC/graphene/PVC laminate is smaller than 6 ppm. It is incredibly lower than the representative critical concentration of sudden mechanical property drops (100-10 000 ppm, Figure 1E).…”

Section: Studies On the Critical Concentrationmentioning

confidence: 99%

Studies on the mechanism for the sudden mechanical property drops of graphene/polymer nanocomposites

Zhang

Yue

et al. 2020

Polymers for Advanced Techs

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Graphene/polymer nanocomposites (GPNCs) have gained intense research interest in recent years. Graphene can improve the properties of the nanocomposites at low loadings, but usually causes sudden drops in the mechanical properties of the nanocomposites at similarly low loadings, risking the performance, reproducibility, and batch stability of the nanocomposites. This problem has been troubling the GPNCs field for years, but it is difficult to solve mainly because the mechanism of the sudden mechanical property drops has not been well documented yet. Here, we present a systematic study on this problem. At first, a statistical study was made to provide an overview of the sudden mechanical property drops. It was found that the sudden mechanical property drops were almost independent of the surface modification of graphene, and the in situ polymerization method sometimes leads to lower critical concentration than the solvent blending and melt blending methods. Then, we demonstrated a cutting‐off mechanism which unveiled that the formation of a continuous or semicontinuous network of graphene throughout the polymeric matrix was the main cause of the sudden mechanical property drops, and the low critical concentration of the sudden mechanical property drops was mainly due to the large aspect ratio of graphene. Finally, future research prospects were proposed. Overall, our work has provided new understandings and insights to the mechanical properties of GPNCs.

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“…The fast volatilization of alcohol may create considerable surface tension and capillary forces, which can bring deformation and shrinkage to the membrane’s surface. CTAB, as a cationic surface-active agent, may induce segregation and aggregation of GO and CNTs and enhance the interfacial adhesion between the light absorber layer and the supporting substrate. − In addition to the paper substrate, the spray can be deposited on other substrate materials (Figure b), indicating that it is possible to extend the membrane evaporator to other materials systems. Importantly, based on this method, large-sized membranes can be produced on industrial production lines (Figure c,d and Figure S1a).…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, GO has good affinity with CNTs because they both have massive carbon atom ring structures. The combination of GO and CNTs makes it possible to carry out self-assembly of CNTs . Second, we used CTAB to enhance the self-assembly.…”

Section: Resultsmentioning

confidence: 99%

Multiscale Preparation of Graphene Oxide/Carbon Nanotube-Based Membrane Evaporators by a Spray Method for Efficient Solar Steam Generation

Zhang

Guo

et al. 2022

ACS Appl. Nano Mater.

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Solar-driven interfacial evaporation is a sustainable and efficient way of producing clean water using solar energy. Currently, most studies on solar-driven interfacial evaporation are based on small-sized evaporators, and it is still a challenge to develop an efficient, simple, and general method for producing evaporators continuously and at a large scale. Herein, we develop a spray-based method for producing graphene oxide (GO)/carbon nanotube (CNT)-based membrane evaporators at various scales. This method enables production of membrane evaporators from a lab scale to an industrial scale. Great efforts have been made to optimize the preparation and properties of the membrane evaporators. A GO-CNT/paper membrane evaporator prepared under optimized conditions exhibits a high evaporation rate of 2.1 kg m–2 h–1 with a corresponding efficiency of 90.1% under one sun irradiation. The evaporator also has high properties of water desalination, purification, and disinfection. Natural lake water evaporation tests show a high water evaporation capacity of ∼8.2 kg m–2 on a sunny day, and the salinity in the obtained water (Na+ ions, 1.2 mg L–1) is below the WHO standards for drinkable water. Overall, an efficient, simple, and scalable method for producing high-performance membrane evaporators has been demonstrated.

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Large-sized graphene oxide as bonding agent for the liquid extrusion of nanoparticle aerogels

Cited by 17 publications

References 53 publications

Nanostructure of Aerogels and Their Applications in Thermal Energy Insulation

Nanostructure of Aerogels and Their Applications in Thermal Energy Insulation

Studies on the mechanism for the sudden mechanical property drops of graphene/polymer nanocomposites

Multiscale Preparation of Graphene Oxide/Carbon Nanotube-Based Membrane Evaporators by a Spray Method for Efficient Solar Steam Generation

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