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Bamboo surface coated with polymethylsilsesquioxane/Cu-containing nanoparticles (PMS/CuNP) xerogel for superhydrophobic and anti-mildew performance
Journal of Wood Science ( IF 2.2 ) Pub Date : 2020-05-11 , DOI: 10.1186/s10086-020-01881-4
Da Wang , Chuanshuang Hu , Jin Gu , Dengyun Tu , Ge Wang , Mingliang Jiang , Weiwei Zhang

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:

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。
更新日期:2020-05-11
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