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Traditional transparent wood lacks the response efficiency and storage capacity to natural light and heat. Here, we report an optically reversible phase-change thermal storage transparent wood (TW/DO). It uses three-dimensional porous delignified wood materials as carriers to encapsulate and shape polymer resin prepared by melt blending method. To increase the adhesion between wood tracheids, 1,4-butanediol diglycidyl ether (BDDE) was used to successfully crosslink the wood cell wall. TW/DO exhibits hydrophobicity, with a melting latent heat of 83.22 J/g and a high effective heat storage conversion rate; After 100 freeze-thaw cycles, the thermal properties remain stable due to the excellent crystal nucleation ability of dodecanol. In environments above the phase transition temperature, its transmittance at 800 nm reaches 78.5 %, and its haze is 33.19 %. TW/DO has excellent leakage resistance and a tensile strength of 60.82 Mpa. In addition, through the construction of a house simulation model, it is known that when TW/DO is used as a building window, compared to glass, it has a significant delaying and suppressing effect on the temperature rise inside the building. This material provides reference for the design of new materials for energy-saving building windows. • Crosslinking agents can increase the adhesion between wood tracheids. • Three dimensional porous wood structure can encapsulate phase change materials. • Endow transparent wood with thermal storage and optical reversibility. • Both the wood cell cavity and cell wall contain phase change resin.
Zhou et al. (Thu,) studied this question.