Two thermochromic laminated veneer cellulose-based alizarin/stearic acid/nano‑silicon dioxide/hexagonal boron nitride composites encapsulated with xanthan gum and wood wax oil films, that have excellent temperature-responsive and thermal-storing capabilities.

Thermochromic wood-based phase change material (TWPCM) is a temperature-responsive, smart material that actively manages thermal energy in response to ambient temperature fluctuations. The material has become a central focus in research on thermal energy storage and temperature sensing in recent years. A key research direction is the incorporation of delignified veneer impregnated with thermochromic phase change material (TPCM) into a multi-layered structure to enhance the thermal energy storage capacity of TWPCM.

A new thermochromic crystal violet lactone/lactic acid/myristyl alcohol ternary mixture encapsulated with a poplar-based cellulose/lignin/SiO framework.

Two thermochromic poplar-based composites, TPC-1 and TPC-2, were fabricated using a crystal violet lactone (CVL)/lactic acid/myristyl alcohol ternary mixture. The mass ratios for TPC-1 and TPC-2 were 10: 3: 200 and 10: 80: 200, respectively. TPC-1 exhibits a common thermochromic property, reversibly changing color from blue to the natural hue of poplar within the temperature range of 28-48 °C.

Encapsulation of thermochromic tetradecyl myristate/methyl red composite via full poplar-based cellulose/lignin/SiO framework for preparation of thermochromic wood with thermal response and storage.

Thermochromic wood (TW), a smart material that can respond to temperature changes and store thermal energy, holds broad potential for application in the construction industry. This study fabricated thermochromic poplar (TP) by encapsulating a thermochromic phase change material (TPCM), consisting of tetradecyl myristate and methyl red, within a full poplar-based cellulose/lignin/SiO framework. Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analyses indicate that the poplar matrix and the incorporated SiO formed an integrated cellulose/lignin/SiO framework, which encapsulated the TPCM within the poplar ducts.