Enabling unidirectional thermal conduction of wood-supported phase change material for photo-to-thermal energy conversion and heat regulation

Shi, Xuetong; Yang, Meng; Bi, Ran; Wan, Zhangmin; Zhu, Ya; Rojas, Orlando J.

doi:10.1016/j.compositesb.2022.110231

Cited by 39 publications

(12 citation statements)

References 63 publications

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“…Elastic Wood Foam Fabrication. Balsa wood was delignified following a previous protocol 67 yielding "Holo-wood" (in reference to a material composed of both cellulose and hemicelluloses). As a reference, Holo-wood was treated with 0.1 M NaOH at 80 °C to remove the hemicelluloses and then freeze-dried, leasing to "Cellwood".…”

Section: Methods and Experimental Sectionmentioning

confidence: 99%

Solid Wood Modification toward Anisotropic Elastic and Insulative Foam-Like Materials

Shi,

Bi,

Wan

et al. 2024

ACS Nano

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The methods used to date to produce compressible wood foam by top-down approaches generally involve the removal of lignin and hemicelluloses. Herein, we introduce a route to convert solid wood into a super elastic and insulative foam-like material. The process uses sequential oxidation and reduction with partial removal of lignin but high hemicellulose retention (process yield of 72.8%), revealing fibril nanostructures from the wood's cell walls. The elasticity of the material is shown to result from a lamellar structure, which provides reversible shape recovery along the transverse direction at compression strains of up to 60% with no significant axial deformation. The compressibility is readily modulated by the oxidation degree, which changes the crystallinity and mobility of the solid phase around the lumina. The performance of the highly resilient foam-like material is also ascribed to the amorphization of cellulosic fibrils, confirmed by experimental and computational (molecular dynamics) methods that highlight the role of secondary interactions. The foam-like wood is optionally hydrophobized by chemical vapor deposition of short-chained organosilanes, which also provides flame retardancy. Overall, we introduce a foam-like material derived from wood based on multifunctional nanostructures (anisotropically compressible, thermally insulative, hydrophobic, and flame retardant) that are relevant to cushioning, protection, and packaging.

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Section: Methods and Experimental Sectionmentioning

confidence: 99%

Solid Wood Modification toward Anisotropic Elastic and Insulative Foam-Like Materials

Shi,

Bi,

Wan

et al. 2024

ACS Nano

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“…Reproduced with permission: Copyright 2022, Elsevier. [26] F I G U R E 14 Sketch of conversion route of biomass to SSPCMs for building sector to achieve efficient building energy savings. Reproduced with permission: Copyright 2022, Elsevier.…”

Section: Electronics Industrymentioning

confidence: 99%

“…To be specific, biomass materials are utilized from the original biomaterial directly or treated with partial modifications. Wood, [ 26 ] rice husk [ 27 ] and other bio‐mass material collected from agricultural solid wastes have been used as the skeleton to successfully prepare the form‐stable PCMs with good thermal performance in many research. Biochar is obtained by the carbonization of biomass materials.…”

Section: Introductionmentioning

confidence: 99%

Recent advances in energy storage and applications of form‐stable phase change materials with recyclable skeleton

Jia,

Jiang,

Pan

et al. 2024

Carbon Neutralization

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With the expansion of the global population, the energy shortage is becoming increasingly acute. Phase change materials (PCMs) are considered green and efficient mediums for thermal energy storage, but the leakage problem caused by volume instability during phase change limits their application. Encapsulating PCMs with supporting materials can effectively avoid leakage, but most supporting materials are expensive and consume huge of natural resources. Carbon materials, which are rich and renewable resources, can be used as economical and environmentally friendly supporting skeletons to prepare form‐stable PCMs. Although many researchers have begun to use recyclable materials especially various derivatives of carbon as supporting skeletons to prepare form‐stable PCMs, the preparation methods, thermophysical properties and applications of form‐stable PCMs with recyclable skeletons have rarely been systematically summarized yet. Form‐stable PCMs with a recyclable skeleton can be used as green and efficient thermal storage materials due to their high heat storage capacity and good thermophysical stability after 2000 thermal cycles. This review investigates the effects of recyclable skeletons on the thermophysical properties including phase change temperature, latent heat, thermal conductivity, supercooling, and thermal cycling reliability. Four major kinds of recyclable skeletons are focused on: biomass, biochar, industrial by‐products as well as waste incineration ash. Additionally, the application scales of form‐stable PCMs with recyclable skeletons are explicated in depth. Moreover, the main challenges confronted by form‐stable PCMs with recyclable skeletons are discussed, and future research trends are proposed. This article provides a systematic review of the form‐stable PCMs with recyclable skeletons, giving significant guidance for further reducing carbon emissions and promoting the development of sustainable energy.

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“…Latent heat thermal energy storage (LHTES) systems, which are based on phase change materials (PCMs), are able to absorb excessive thermal energy from solar energy and adjust the indoor ambient temperature by the reversible phase transition process. − Among various PCMs, organic PCMs such as paraffin, fatty acids, and alcohols have received tremendous attention because of their high energy storage density, excellent chemical stability, suitable phase transition temperatures, nontoxic, and noncorrosive . However, the liquid leakage issues of organic PCMs during solid–liquid phase transition severely restrict their practical application for thermal energy storage. − …”

Section: Introductionmentioning

confidence: 99%

Flame-Retardant and Form-Stable Delignified Wood-Based Phase Change Composites with Superior Energy Storage Density and Reversible Thermochromic Properties for Visual Thermoregulation

Wang

Yue

et al. 2023

ACS Sustainable Chem. Eng.

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The development of form-stable phase change materials (PCMs) with flame retardancy and the visual thermal storage process is crucial for their application in building energy conservation. Herein, an active phosphorus/ammonium-containing non-formaldehyde flame retardant (APA) was synthesized based on the natural compound phytic acid. Then, wood-based form-stable PCM composites (PTPCMs) with high energy storage density, excellent flame retardancy, and real-time and visual reversible thermochromic properties were successfully fabricated by impregnating the thermochromic compound into the APA-grafted delignified wood. The delignified wood well supports the solid–liquid PCMs and avoids their liquid leakage during phase transition due to the high surface tension and strong capillary effect. The differential scanning calorimetry (DSC) results showed that the PTPCMs possessed high thermal energy storage density (165.3–198.6 J/g) and reliable thermal stability. With the concentration of the flame-retardant APA increased, the peak heat release rate (pHRR) and total heat release (THR) of PTPCMs reduced noticeably, demonstrating the enhanced flame retardancy of PTPCMs. Moreover, PTPCM composites had good thermoregulation properties and the visualization of the phase transition process was made possible by the reversible thermochromic properties. In summary, the novel PTPCMs show tremendous application potential for efficient building energy conservation.

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Enabling unidirectional thermal conduction of wood-supported phase change material for photo-to-thermal energy conversion and heat regulation

Cited by 39 publications

References 63 publications

Solid Wood Modification toward Anisotropic Elastic and Insulative Foam-Like Materials

Solid Wood Modification toward Anisotropic Elastic and Insulative Foam-Like Materials

Recent advances in energy storage and applications of form‐stable phase change materials with recyclable skeleton

Flame-Retardant and Form-Stable Delignified Wood-Based Phase Change Composites with Superior Energy Storage Density and Reversible Thermochromic Properties for Visual Thermoregulation

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