Superhydrophobic photoresponsive wood (HPW) was synthesized through the vacuum pressure impregnation process with octadecyltrimethoxysilane (OTS), spiropyran, and polyvinyl alcohol (PVA). The process endowed the wood with photostimulation responsiveness and superhydrophobic characteristics. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Time of Flight Secondary Ion Mass Spectrometry (TOF-SIMS), Fourier transform infrared spectroscopy (FTIR), and a contact angle meter were analyzed to determine the micromorphology, chemical composition, and hydrophobicity of the modified wood. The modified wood had a micro-nanometer mastoid structure at the microscopic level, with a large number of hydrophobic groups. The static water contact angle of the modified wood reached 153°, the water absorption rate decreased from 123.28 % to 19.29 %, and the anti-swelling rate was only 1.69 %, showing good hydrophobic and anti-swelling performance. At the same time, color values of the wood , , , and total color difference , it was found that spiropyran made the modified wood have a rapid response to light stimulation.

中文翻译：

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具有可逆光响应特性的超疏水木材

以十八烷基三甲氧基硅烷（OTS）、螺吡喃和聚乙烯醇（PVA）为原料，通过真空压力浸渍工艺合成了超疏水光响应木材（HPW）。该过程赋予木材光刺激响应性和超疏水特性。通过扫描电子显微镜 (SEM)、能量色散光谱 (EDS)、飞行时间二次离子质谱 (TOF-SIMS)、傅里叶变换红外光谱 (FTIR) 和接触角计进行分析，以确定微观形貌、化学成分、和改性木材的疏水性。改性木材在微观水平上具有微纳米乳突结构，具有大量疏水基团。改性木材的静态水接触角达到153°，吸水率从123.28%下降到19.29%，抗膨胀率仅为1.69%，表现出良好的疏水和抗膨胀性能。同时对木材的色值、、、总色差进行分析，发现螺吡喃使改性木材对光刺激有快速的反应。