Composite phase change materials with good reversible thermochromic ability in delignified wood substrate for thermal energy storage

Yang, Haiyue; Wang, Shaobin; Yu, Qianqian; Cao, Guoliang; Yang, Rue; Ke, Jiaona; Di, Xin; Liu, Feng; Zhang, Wenbo; Wang, Chengyu

doi:10.1016/j.apenergy.2017.12.006

Cited by 139 publications

(62 citation statements)

References 58 publications

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“…Accordingly, the development of innovative insulation materials has gained the interest of the scientific community in the recent years. Two different approaches have been adopted: (1) the reduction of the amount of material used, that is, improving the thermal performance of the materials [9,10]; and (2) the reduction of the environmental impact associated to the material, that is, replacing conventional materials with "environmental friendly" ones [11,12]. Aerogels and vacuum insulation cells are examples of the former.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimisation of bio-based thermal insulation materials in building envelopes considering condensation risk

et al. 2018

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The reduction in energy demand for heating and cooling with insulation materials increases the material related environmental impact. Thus, implementing low embodied energy materials may equilibrate this tradeoff. Actual trends in passive house postulate bio-based materials as an alternative to conventional ones. Despite that, the implementation of those insulators should be carried out with a deeper analysis due to their hygroscopic properties. The moisture transfer, the associated condensation risk and the energy consumption for seven bio-based materials and polyurethane for a building-like cubicle are analysed. The performance is evaluated combining a software application to model the cubicle (EnergyPlus) and a tool to optimize its performance (jEPlus). The novelty of this optimization approach is to include and evaluate the effects of moisture in these insulation materials, taking into account the mass transfer through the different layers and the evaporation of the different materials. This methodology helps optimise the insulation type and thickness verifying the condensation risk, preventing the deterioration of the materials. The total cost of the different solutions is quantified, and the environmental impact is determined using the life cycle assessment methodology. The effect of climate conditions and the envelope configuration, as well as the risk of condensation, are quantified. The results show that cost and environmental impact can be reduced if bio-based materials are used instead of conventional ones, especially in semiarid climates. Condensation risk occurs for large thicknesses and in humid climates. In our case studies, hemp offered the most balanced solution.

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Section: Introductionmentioning

confidence: 99%

Multi-objective optimisation of bio-based thermal insulation materials in building envelopes considering condensation risk

et al. 2018

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“…Contrary to this, enthalpy values increase to varying degrees. This result can be attributed to the addition of a thermochromic compound, which promoted the formation of the rotator phase and crystalline structure of 1-HD [28]. Therefore, appropriate addition of ODB-2 and BPA had a negligible effect on the phase transition temperature and enhanced the enthalpy values of TC-PCMs.…”

Section: Resultsmentioning

confidence: 99%

“…The mechanism is as follows: ODB-2, like many other similar chromophores, presents two different isomers: the leuco lactone form, which is colorless, and the open carboxylate state, which is colored. When 1-HD starts to crystalize as temperature decreases, the equilibrium between both isomers of ODB-2 is displaced by interactions with bisphenol A through hydrogen bonding, which favors ring-opening of the color former (Figure 1) [27,28,29,30].…”

Section: Introductionmentioning

confidence: 99%

Excellent Temperature-Control Based on Reversible Thermochromic Materials for Light-Driven Phase Change Materials System

et al. 2019

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Light-driven phase change materials (PCMs) have received significant attention due to their capacity to convert visible light into thermal energy, storing it as latent heat. However, continuous photo-thermal conversion can cause the PCMs to reach high thermal equilibrium temperatures after phase transition. In our study, a novel light-driven phase change material system with temperature-control properties was constructed using a thermochromic compound. Thermochromic phase change materials (TC-PCMs) were prepared by introducing 2-anilino-6-dibutylamino-3-methylfluoran (ODB-2) and bisphenol A (BPA) into 1-hexadecanol (1-HD) in various proportions. Photo-thermal conversion performance was investigated with solar radiation (low power of 0.09 W/cm2) and a xenon lamp (at a high power of 0.14 W/cm2). The TC-PCMs showed a low equilibrium temperature due to variations in absorbance. Specifically, the temperature of TC-PCM180 (ODB-2, bisphenol A and 1-HD ratio 1:2:180) could stabilize at 54 °C approximately. TC-PCMs exhibited reversibility and repeatability after 20 irradiation and cooling cycles.

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“…The thermochromic compound (DTBC) with a weight ratio of 1 : 4 : 50 was prepared by mixing of CVL (a leuco agent), BPA (color developer) and DD/TD (solvent). 44 The DD/TD complex solvent was heated at 90 C until molten in oil bath, and then the DD/TD mixture was stirred for 0.5 h to obtain uniform DT composite solvent. Aer, CVL and BPA were mixed into the above DD/TD composite solvent to form a uniform DTBC compound under stirring for 1 h. The composite phase change lm (DTLD) was assembled by the impregnation of the DTBC compound into the LD lm under vacuum at 90 C for ten minutes to remove the bubbles and excess moisture contained in the LD, and then maintained for 36 h to obtain DTLD composite phase change lm.…”

Section: Fabrication Of Thermochromic Compound and Composite Phase Chmentioning

confidence: 99%

Shape-stabilized composite phase change film with good reversible thermochromic properties fabricated via phase inversion-assisted impregnation

et al. 2020

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Composite phase change materials with good reversible thermochromic ability in delignified wood substrate for thermal energy storage

Cited by 139 publications

References 58 publications

Multi-objective optimisation of bio-based thermal insulation materials in building envelopes considering condensation risk

Multi-objective optimisation of bio-based thermal insulation materials in building envelopes considering condensation risk

Excellent Temperature-Control Based on Reversible Thermochromic Materials for Light-Driven Phase Change Materials System

Shape-stabilized composite phase change film with good reversible thermochromic properties fabricated via phase inversion-assisted impregnation

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