Thermochromic poplar that changes colour at 16–30 °C

Zou, Weihua; Wang, Zhangheng; Li, Zimu; Sun, De’an

doi:10.1007/s00107-022-01799-2

Cited by 6 publications

(4 citation statements)

References 39 publications

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“…Plantation poplar is widely planted in many countries; itis a kind of farmed green material [21][22][23]. We used the longitudinal-cutting plantation poplar wood as the matrix material in this work as it is a good substitute for the natural forest woods.…”

Section: Materials and Chemicalsmentioning

confidence: 99%

“…The UT305A infrared thermometer (UNI-T. Ningbo, China) was used to test their surface temperatures after OP and TESPs were heat-treated at 60 • C for 30 min, and each temperature was measured at 5 min intervals. The weights of TESPs before and after heat treatment at 103 • C for 150 h were compared to test the heat resistances of TESP with or without the SiO 2 film [23,24].…”

Section: Test Sectionmentioning

confidence: 99%

“…The FT-IR spectra of PCMs: The strong signals at 1450 cm −1 , 2850 cm −1 and 2900 cm −1 all correspond C-H groups of dimethyl and trimethyl in PCMs (PCM-1, lauryl alcohol, C 12 H 26 O; PCM-2, decanoic acid, C 10 H 20 O 2 ; and PCM-3, myristic acid myristyl ester, C 28 H 56 O 2 ), respectively [22][23][24][25].…”

Section: Sem and Eds Analysismentioning

confidence: 99%

“…The PCMs can absorb heat and release heat in the phase-changing process, and the TESPs are mostly related to thermal temperature, so we analyzed the heat resistance of TESPs. The heat resistances of the TESPs with or without SiO 2 film were tested by comparing the weights of TESPs before and after heat treatment (103 • C, 150 h) [23,24]. Without the SiO 2 film, the weights of TESP-1, TESP-2 and TESP-3 reduced by about 38%, 36% and 22%, respectively, after the heat treatment.…”

Section: Thermal Energy Storage and Heat Resistancementioning

confidence: 99%

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A Simpler Fabrication for Thermal Energy Storage Wood

Zou

Cong

Sun

et al. 2023

Forests

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Using thermal energy storage wood with phase change materials (PCM) as a building material can save thermal energy during heat-induced phase transition, and can reduce the energy consumption of indoor heating. In our work, three thermal energy storage poplars (TESPs: TESP-1, TESP-2 and TESP-3) were prepared by directly infiltrating three PCMs (fatty alcohol/acid materials: lauryl alcohol, decanoic acid and myristic acid myristyl ester), respectively, into the longitudinal-cutting plantation poplar woods and by directly encapsulating the PCMs in the poplar-based materials with SiO2 films. The phase-changing temperature ranges of TESP-1, TESP-2 and TESP-3 were at 19–30 °C, 26–39 °C and 33–54 °C, respectively. The phase-changing temperature peaks were at ~24 °C, ~31 °C and ~42 °C, respectively. After the same heat treatment on TESPs and original poplar (OP), the average temperature of TESPs was higher than that of OP after 35 min, thus proving that TESPs can save more thermal energy than OP. The radial bending strengths of TESP-1, TESP-2 and TESP-3 had increased by 50.85%, 70.16% and 70.31%, respectively, as compared to with that of OP. Additionally, the radial bending elastic modules of TESP-1, TESP-2 and TESP-3 had increased by 47.14%, 67.38% and 74.57%, respectively, as compared to OP. The tangential section hardness of the TESPs also had also increased by 67.09%, 71.80% and 80.77%, respectively. These improved mechanical properties of TESPs are almost close to that of ash wood (ash wood is a common building material), therefore, this proves that our TESPs can be used as thermal energy-saving building materials.

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Section: Materials and Chemicalsmentioning

confidence: 99%

Section: Test Sectionmentioning

confidence: 99%