A multifunctional carbon-base phase change composite inspired by "fruit growth"

He, Hongfei; Dong, Mingyang; Wang, Qingqing; Zhang, Jin; Feng, Qi; Wei, Qufu; Cai, Yibing

doi:10.1016/j.carbon.2023.01.038

Cited by 24 publications

(6 citation statements)

References 45 publications

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“…Figure B2 shows the surface temperature profile of the sample from 0 to 220 s under simulated light. All surface temperatures increase over time, but there is a point of inflection in the SPSS that flattens out, suggesting that the temperature at this point reaches the melting point of paraffin. − The rise in temperature that follows represents the photothermal layer on the surface of the sample, where light energy is converted into heat. All samples’ surface temperatures significantly decrease in the absence of simulated irradiation, particularly between 720 and 900 s for PSS (Figure B1).…”

Section: Resultsmentioning

confidence: 99%

Hydrophobic Solid Photothermal Slippery Surfaces with Rapid Self-repairing, Dual Anti-icing/Deicing, and Excellent Stability Based on Paraffin and Etching

Wei,

Yang,

Xiao

et al. 2024

Langmuir

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Ice and snow disasters have greatly affected both the global economy and human life, and the search for efficient and stable anti-icing/deicing coatings has become the main goal of much research. Currently, the development and application of antiicing/deicing coatings are severely limited due to their complex preparation, structural fragility, and low stability. This work presents a method for preparing hydrophobic solid photothermal slippery surfaces (SPSS) that exhibit rapid self-repairing, dual antiicing/deicing properties, and remarkable stability. A photothermal layer of copper oxide (CuO) was prepared by using chemical deposition and etching techniques. The layer was then impregnated with stearic acid and solid paraffin wax to create a hydrophobic solid photothermal slippery surface. This solves the issue of low stability on superhydrophobic surfaces caused by fragile and irretrievable micro/nanostructures. In addition, the underlying photothermal superhydrophobic surface provides good anti-icing/ deicing properties even if the paraffin on the surface evaporates or is lost during operation. The findings indicate that when subjected to simulated light irradiation, the coating's surface temperature increases to 80 °C within 12 min. The self-repair process is completed rapidly in 170 s, and at −15 °C, it takes only 201 s for the ice on the surface to melt completely. The surface underneath the paraffin exhibited good superhydrophobic properties, with a contact angle (CA) of 154.1°and a sliding angle (SA) of 6.8°after the loss of paraffin. Simultaneously, the surface's mechanical stability and durability, along with its self-cleaning and antifouling properties, enhance its service life. These characteristics provide promising opportunities for practical applications that require longterm anti-icing/deicing surfaces.

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Section: Resultsmentioning

confidence: 99%

Hydrophobic Solid Photothermal Slippery Surfaces with Rapid Self-repairing, Dual Anti-icing/Deicing, and Excellent Stability Based on Paraffin and Etching

Wei,

Yang,

Xiao

et al. 2024

Langmuir

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“…Cu/Ag/CA-PEI@Cotton with excellent electrical properties can be a candidate for EMI shielding materials. The EMI SE (SE T ) was the total sum of microwave re ection (SE R ) and microwave absorption (SE A ) (He, et al 2023) when SE T exceeded 10 dB, and the average of SE T , calculated SE A and SE R are shown in Fig. 6f.…”

Section: Fabrication Of Cu/ag/ca-pei@cottonmentioning

confidence: 99%

A method of constructing highly durable conductive materials by growing metal particles inside and outside fibers through solvation and multivalent bonding forces

Wen,

Du,

Sun

et al. 2024

Cellulose

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Metallized textiles have shown promising applications in the elds of electrical conductivity, Joule heating and electromagnetic shielding. Poor durabilities, especially washability, which caused by the signi cant mechanical mismatch between rigid metal parts and textiles have hindered commercialization process of these functional textiles. This work constructed ultra-durable conductive cotton fabrics by growing copper nanoparticles with amorphous region-controlled swelling and multivalent bonding forces to complex the metal particles. The enlarged ber amorphous zone and phen-amine molecules are used as templates to provide further possibilities for the internal and external enrichment growth of copper nanoparticles, providing good conductivity and high durability of the processed cotton fabric. The constructed fabric exhibits excellent electrical conductivity (6.09±0.36×10 -3 Ω/sq), electrothermal conversion (60 s, 1 V, ~140 °C) and electromagnetic shielding e ciency (65.32 dB). Notably, the electrical conductivity of the fabric remains essentially unchanged (Rs/R 0 =1.106) after 100 standard washing tests. This is attributed to the increase in metal particle loading and the enhancement of metal-ber bonding fastness. Therefore, this work might provide a novel insight for constructing ultra-washable conductive clothing textiles with heating and EMI shielding performance.

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“…Most importantly, the combination of PCMs with photothermally responsive 3Dstructured multiporous carbon materials can improve the utilization efficiency of solar photothermal energy. 25,26 Various efforts have been made to design various photothermally responsive multiporous carbon materials to load PCMs for solar thermoelectric applications. Lv et al 27 developed a robust green and unidirectional carboxymethyl cellulose/boron nanosheet complex aerogel and combined it with lauric acid as a PCM.…”

Section: Introductionmentioning

confidence: 99%

“…Incorporating PCMs with porous materials, such as expanded perlite, mesoporous silica, carbonized wood, biological porous carbon, and modified graphene hybrid aerogel, is one of the most effective solutions for enhancing the thermal performance of PCMs. Most importantly, the combination of PCMs with photothermally responsive 3D-structured multiporous carbon materials can improve the utilization efficiency of solar photothermal energy. , Various efforts have been made to design various photothermally responsive multiporous carbon materials to load PCMs for solar thermoelectric applications. Lv et al developed a robust green and unidirectional carboxymethyl cellulose/boron nanosheet complex aerogel and combined it with lauric acid as a PCM.…”

Section: Introductionmentioning

confidence: 99%

Unidirectionally Structured Magnetic Phase-Change Composite Based on Carbonized Polyimide/Kevlar Nanofiber Complex Aerogel for Boosting Solar-Thermo-Electric Energy Conversion

Shi,

Liu,

Wang

2024

ACS Appl. Mater. Interfaces

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To realize highly efficient solar-thermo-electric energy conversion for clean electricity power generation, we have developed a new type of unidirectionally structured magnetic phase-change composite comprising a carbonized polyimide (C−PI)/Kevlar nanofiber (KNF) complex aerogel as a 3D carbon skeleton porous supporting material, CoFe 2 O 4 nanoparticles as a magnetic additive, polyethylene glycol (PEG) as a phase-change material, and polypyrrole as a photothermal absorption coating layer. The as-fabricated C−PI/KNF complex aerogel exhibits a unidirectional microstructure, high porosity, robust skeleton frame, ultralight weight, and high thermal conductance. Featured with such unique structure and characteristics, the complex aerogel can offer an effective heat and electron transfer method to ensure highly efficient solarthermal conversion and photothermal energy storage of the developed composite. The developed composite exhibits a high latent heat capacity of over 150 J g −1 , outstanding shape stability along with a low leakage of 0.2 wt %, good thermal cycling stability, and high photothermal conversion efficiency of 84.8%. Based on the Seebeck effect, a solar thermoelectric generation system (STEGS) was constructed with the hot side coupled with the developed composite and the cold side immersed in air and ice water. Under 2.0 kW m −2 solar irradiation, the developed STEGS in ice water obtained maximum output voltage and current of 259.7 mV and 27.1 mA, respectively, which are significantly higher than those in air. The output power of the developed STEGS in an ice water environment is 50.6% higher than that in air under 4.0 kW m −2 solar irradiation. More importantly, the developed STEGS in ice water continuously generated output voltage and current for about 810 s without solar irradiation thanks to the latent heat release by the PEG component within the developed composite. In addition, the introduction of magnetic CoFe 2 O 4 can accelerate solar-thermal conversion through periodic electron motion by the Neél relaxation or Brownian relaxation. This resulted in an increase in the maximum output voltage and current by 13.7 and 11.5%, respectively, under an alternating magnetic field as a result of the magnetism-accelerated solar-thermo-electric conversion. This study offers an innovative approach for developing PCM-based advanced functional materials for solar energy utilization in clean and sustainable electricity generation.

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A multifunctional carbon-base phase change composite inspired by "fruit growth"

Cited by 24 publications

References 45 publications

Hydrophobic Solid Photothermal Slippery Surfaces with Rapid Self-repairing, Dual Anti-icing/Deicing, and Excellent Stability Based on Paraffin and Etching

Hydrophobic Solid Photothermal Slippery Surfaces with Rapid Self-repairing, Dual Anti-icing/Deicing, and Excellent Stability Based on Paraffin and Etching

A method of constructing highly durable conductive materials by growing metal particles inside and outside fibers through solvation and multivalent bonding forces

Unidirectionally Structured Magnetic Phase-Change Composite Based on Carbonized Polyimide/Kevlar Nanofiber Complex Aerogel for Boosting Solar-Thermo-Electric Energy Conversion

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