In this study, a colloidal suspension, composed of polymethylsilsesquioxane (PMS) and Cu-containing nanoparticles (CuNP), was prepared through simple neutralization reaction using sodium methyl siliconate (SMS) and CuCl2 solutions. The nano-structure of CuNP was investigated by TEM and the results showed that lamellar crystal Cu(OH)2 with size of around 10 nm was imbedded in PMS nano-particle. The FTIR also confirmed the presence of small amount of PMS in CuNP. The specific nano-structure of CuNP resulted in excellent thermal stability based on TG analysis. After dip-coating in optimized conditions and drying, a PMS/CuNP xerogel coating layer was generated at the bamboo surface, endowing superhydrophobic and excellent anti-mildew performance according to ASTM D3273-16. The water contact angle (WCA) reached up to 151.3 ± 1.9° and the mildew resistance grade was marked as 10 where no mold was found at the surface after 4 weeks incubation.

中文翻译：

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竹表面涂有聚甲基倍半硅氧烷/含铜纳米颗粒（PMS / CuNP）干凝胶，具有超疏水和防霉性能

在这项研究中，通过使用甲基硅酸钠（SMS）和CuCl2溶液进行简单的中和反应，制备了由聚甲基倍半硅氧烷（PMS）和含铜纳米颗粒（CuNP）组成的胶体悬浮液。通过TEM对CuNP的纳米结构进行了研究，结果表明，在PMS纳米粒子中嵌入了约10 nm左右的层状晶体Cu（OH）2。FTIR还证实了CuNP中存在少量PMS。根据TG分析，CuNP的特定纳米结构具有出色的热稳定性。在最佳条件下进行浸涂并干燥后，根据ASTM D3273-16，在竹表面产生了PMS / CuNP干凝胶涂层，赋予超疏水性和出色的防霉性能。水接触角（WCA）达到151.3±1。