Three dimensional carbon aerogel for microwave absorption from chitosan

Xu, Jie

doi:10.1016/j.synthmet.2023.117352

Cited by 9 publications

(3 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…et al, 2020). This trend is similarly observed in chitosan-based carbon aerogels, where higher carbonization temperatures result in sharper (002) peaks (Lv et al, 2021;Xu, 2023).…”

Section: Carbonization Temperaturesupporting

confidence: 65%

The effect of synthesis conditions and process parameters on aerogel properties

Payanda Konuk,

Alsuhile,

Yousefzadeh

et al. 2023

Front. Chem.

View full text Add to dashboard Cite

Aerogels are remarkable nanoporous materials with unique properties such as low density, high porosity, high specific surface area, and interconnected pore networks. In addition, their ability to be synthesized from various precursors such as inorganics, organics, or hybrid, and the tunability of their properties make them very attractive for many applications such as adsorption, thermal insulation, catalysts, tissue engineering, and drug delivery. The physical and chemical properties and pore structure of aerogels are crucial in determining their application areas. Moreover, it is possible to tailor the aerogel properties to meet the specific requirements of each application. This review presents a comprehensive review of synthesis conditions and process parameters in tailoring aerogel properties. The effective parameters from the dissolution of the precursor step to the supercritical drying step, including the carbonization process for carbon aerogels, are investigated from the studies reported in the literature.

show abstract

“…et al, 2020). This trend is similarly observed in chitosan-based carbon aerogels, where higher carbonization temperatures result in sharper (002) peaks (Lv et al, 2021;Xu, 2023).…”

Section: Carbonization Temperaturesupporting

confidence: 65%

The effect of synthesis conditions and process parameters on aerogel properties

Payanda Konuk,

Alsuhile,

Yousefzadeh

et al. 2023

Front. Chem.

View full text Add to dashboard Cite

show abstract

“…Compared with the sample with 40 wt.% and 60 wt.% ZnO/C absorbent content, the ZnO/C-filled paraffin composite sample filled with 50 wt.% absorbent content presents the favorable reflection loss of −25.64 dB and optimal effective absorption bandwidth of 2.21 GHz. Table 2 exhibits the microwave absorption properties of ZnO/C composite absorbent and some other reported composites filled with ZnO or C absorbents [32][33][34][35][36][37][38][39][40]. In contrast, the investigated ZnO/C composite absorbent in this work presents favorable microwave absorption properties.…”

Section: Microwave Absorption Propertiesmentioning

confidence: 84%

Tunable Complex Permittivity and Strong Microwave Absorption Properties of Novel Dielectric-Conductive ZnO/C Hybrid Composite Absorbents

Yan

Jia

Zhou

et al. 2023

Metals

View full text Add to dashboard Cite

Modern electronic information technology has led social life into inevitable electromagnetic pollution, making microwave absorbing materials more and more important. Herein, dielectric-conductive ZnO/C hybrid composite absorbents were prepared by two-step carbonization with ZnO powders and glucose as critical materials. The electrical conductivity, complex permittivity, and reflection loss were analyzed to study the dielectric and microwave absorption properties. Results show that the prepared ZnO/C composite absorbents exist in the form of rod-like ZnO dispersed in the irregular block carbon, and the complex permittivity of the composite absorbents can be adjusted via varying the carbonization temperature. The minimum reflection loss of −25.64 dB is achieved at 1.8 mm thickness for the composite absorbent with 50 wt.% absorbent content as the final carbonization temperature is 750 °C, and the optimum effective absorption bandwidth is 2.21 GHz at 9.64–11.85 GHz. The excellent microwave absorption properties of ZnO/C composite absorbents are attributed to the combination actions of dipole polarization, conductance loss, and interface polarization, which is significant for the purposeful design of superior microwave-absorbing materials with dielectric and conductive absorbents.

show abstract

“…Research has focused on carbon aerogel as an oil/organic solvent-absorbing material (OAM) because of its chemical robustness, its porous structure, and its low density [ 10 ]. However, despite these advantages, improvements still need to be made to the manufacturing of carbon aerogels, including the long production time, the utilization of petroleum-based chemical monomers, and the harsh conditions under which they are made [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Sustainable and Elastic Carbon Aerogel by Polydimethylsiloxane Coating for Organic Solvent Absorption and Potential Application for Sensors (Infections, Environmental, Wearable Sensors, etc.)

et al. 2023

View full text Add to dashboard Cite

Carbon aerogel is a promising material in various applications, such as water treatment, insulators, catalysts, and sensors, due to its porosity, low density, conductivity, and good chemical stability. In this study, an inexpensive carbon aerogel was prepared through lyophilization and post-pyrolysis using waste paper. However, carbon aerogel, in the form of short belts, is randomly entangled without a crosslinking agent and has weak mechanical properties, thus limiting its applications, which would otherwise be various. In this paper, a novel strategy is proposed to fabricate a PDMS-coated carbon aerogel (Aerogel@PDMS). Benefiting from microwave heating, precise PDMS coating onto the carbon frame was able to be carried out in a short amount of time. PDMS coating firmly tied the carbon microstructure, maintaining a unique aerogel property without blocking its porous structure. FE-SEM, RAMAN, XPS, and FT-IR were all used to confirm the surface change in PDMS coating. Compressible stability and water contact angle measurement showed that Aerogel@PDMS is a perspective organic solvent absorbent due to its good resilience and its hydrophobicity, and, as a result, its organic solvent absorption capacity and repeated absorption were evaluated, ultimately suggesting a promising material in oil clean-up and pollution remediation in water. Based on our experimental results, we identified elastic carbon aerogels provided by a novel coating technology. In the future, then, the developed carbon/PDMS composite can be examined as a promising option for various applications, such as environmental sensors, virus sensors, and wearable sensors.

show abstract

Three dimensional carbon aerogel for microwave absorption from chitosan

Cited by 9 publications

References 49 publications

The effect of synthesis conditions and process parameters on aerogel properties

The effect of synthesis conditions and process parameters on aerogel properties

Tunable Complex Permittivity and Strong Microwave Absorption Properties of Novel Dielectric-Conductive ZnO/C Hybrid Composite Absorbents

Sustainable and Elastic Carbon Aerogel by Polydimethylsiloxane Coating for Organic Solvent Absorption and Potential Application for Sensors (Infections, Environmental, Wearable Sensors, etc.)

Contact Info

Product

Resources

About