Central South University of Forestry and Technology, Shaoshan South Road 498, Changsha, 410004, China.
Sci Rep. 2021 Aug 19;11(1):16865. doi: 10.1038/s41598-021-95274-2.
The red thermochromic dye (R-TD) is the tetradecanoic acid tetradecyl ester (CHO) and methyl red (CHNO) mixture that has better permeability enabling its infiltration into wood and better thermochromic properties changing its colour at above 30 °C after about 0.5 min. Thicker poplar-based thermochromic composite specimens (R-PTC, thickness: 5.0 mm) were prepared by filling the R-TD into pre-treated poplar veneer (thickness: 5.0 mm) thus allowing better penetration after pre-treatment. After R-TD infiltration, the R-PTC samples were covered by polypropylene wax for preventing R-TD from overflowing from R-PTC under the action of phase-change temperature. This R-PTC, whose colour can change from light-red to dark-red at 38 °C to 46 °C, can recover to light-red at below 38 °C after about 14 h, and the peak of colour change is at about 42 °C. R-PTC will be suitable for materials used in thermochromic furniture that can indicate the surface temperature to potential users, thus allowing assessment of likely scalded pain when used the furniture.
红色热致变色染料（R-TD）是十四酸十四醇酯（CHO）和甲基红（CHNO）的混合物，具有更好的渗透性，使其能够渗透到木材中，并且具有更好的热致变色性能，在 30°C 以上约 0.5 分钟后改变颜色。较厚的杨木基热致变色复合材料（R-PTC，厚度：5.0 毫米）是通过将 R-TD 填充到预处理的杨木单板（厚度：5.0 毫米）中制备的，因此在预处理后允许更好的渗透。在 R-TD 渗透后，R-PTC 样品用聚丙烯蜡覆盖，以防止 R-TD 在相变温度的作用下从 R-PTC 中溢出。这种 R-PTC 的颜色可以在 38°C 到 46°C 之间从浅红色变为深红色，在大约 14 小时后可以恢复到浅红色，颜色变化的峰值约为 42°C。R-PTC 将适用于用于热致变色家具的材料，这些材料可以向潜在用户显示表面温度，从而可以评估使用家具时可能造成的烫伤疼痛。
