超疏水表面因优异的自清洁性能被广泛应用于诸多领域,但大多数超疏水自清洁表面的耐紫外老化性能较差,严重限制了其作为建筑外墙表面自清洁涂层的大规模应用。为提高超疏水自清洁涂层的耐紫外老化性能,拓宽其在建筑外墙表面的应用范围,采用酸沉淀法将纳米SiO2包覆在绢云母表面制备绢云母-SiO2复合颗粒,然后采用十六烷基三甲氧基硅烷(HDTMS)对绢云母-SiO2复合颗粒进行改性,并喷涂在基底表面,制备了具有耐紫外老化性能的绢云母-SiO2/HDTMS超疏水自清洁涂层。结果表明,涂层表面的水接触角和滚动角分别为153.6°和6.0°,具有超疏水自清洁性能。此外,该涂层还具有优异的耐紫外老化性能,紫外光连续照射30d,其表面的超疏水自清洁性能没有明显降低,具有长时间在户外应用的潜质。
Superhydrophobic surfaces have been widely used in many fields due to their excellent self-cleaning performance.However,the UV-aging resistance of most superhydrophobic self-cleaning surfaces was poor,which severely limits their large-scale application as self-cleaning coatings for building exterior wall surfaces.In order to improve the UV-aging resistance of superhydrophobic self-cleaning coatings and broaden their application range on building exterior walls,nano-SiO2 was loaded on the surface of sericite by acid precipitation method to prepare sericite-SiO2 composite particles.Then,they were modified with hexadecyltrimethoxysilane (HDTMS) and sprayed on the surface of the substrate to prepare superhydrophobic sericite-SiO2/HDTMS self-cleaning coatings with UV-aging resistance.The results showed that the water contact angle and water slide angle of the coating surface were 153.6° and 6.0°,respectively,demonstrating superhydrophobic self-cleaning performance.Furthermore,the coating also had excellent UV-aging resistance.The superhydrophobic self-cleaning performance of its surface did not significantly decrease after continuous UV irradiation for 30 days,indicating potential for long-term outdoor applications.
[1] Tong W,Xiong D S.Bioinspired superhydrophobic materials:progress and functional application[J].Journal of Inorganic Materials,2019,34:1133.
[2] 江雷.从自然到仿生的超疏水纳米界面材料[J].化工进展,2003,22(12):1258-1264.
[3] 侯萍萍.二氧化硅基超疏水材料在建筑外墙防污自洁方面的应用研究[D].宜昌:三峡大学,2023.
[4] Jiang R J,Hao L W,Song L J,et al.Lotus-leaf-inspired hierarchical structured surface with non-fouling and mechanical bactericidal performances[J].Chemical Engineering Journal,2020,398(1):125609.
[5] 王景明,王轲,郑咏梅,等.荷叶表面纳米结构与浸润性的关系[J].高等学校化学学报,2010,31(8):1596-1599.
[6] Klicova M,Oulehlova Z,Klapstova A,et al.Biomimetic hierarchical nanofibrous surfaces inspired by superhydrophobic lotus leaf structure for preventing tissue adhesions[J].Materials & Design,2022,217(17):110661.
[7] 柴瑶,井一凡,王雅培,等.废弃天然资源回收利用构筑超浸润材料的研究进展[J].印染,2024,50(8):83-89.
[8] 杜晨光,夏帆,王树涛,等.仿生智能浸润性表面研究的新进展[J].高等学校化学学报,2010,31(3):421-431.
[9] Wang K,Yu S,Li W,et al.Superhydrophobic and photocatalytic synergistic self-cleaning ZnS coating[J].Applied Surface Science,2022,595:153565.
[10] Zhou P,Zhu Z Y,She W.A superhydrophobic mortar with ultra-robustness for self-cleaning,anti-icing,and anti-corrosion[J].Chemical Engineering Journal,2024,495:153488.
[11] Zhang D M,Wang H D,Huang M C,et al.Fabrication of radiative cooling film with superhydrophobic self-cleaning property[J].Surface Innovations,2023,11(5):285-296.
[12] 刘海峰,刘英菊,禹筱元,等.酶刻蚀制备超疏水材料及其油水分离性能分析的综合实验设计[J].实验技术与管理,2024,41(9):213-221.
[13] 刘恩洋,王丽媛,王珺,等.镁合金超疏水涂层的制备及性能综合实验设计[J].实验技术与管理,2022,39(6):50-55.
[14] Zhang L,Li R,Ding H,et al.Preparation of a self-cleaning TiO2-SiO2/PFDTS coating with superamphiphobicity and photocatalytic performance[J].Progress in Organic Coatings,2024,197:108767.
[15] Zhang L,Liu Y,Wang X,et al.Fabrication of sericite-TiO2/HDTMS superhydrophobic self-cleaning coatings by hydrothermal method[J].Journal of Alloys and Compounds,2025,1014:178677.
[16] Wang X,Ding H,Wang C,et al.Self-healing superhydrophobic A-SiO2/N-TiO2@HDTMS coating with self-cleaning property[J].Applied Surface Science,2021,567:150808.
[17] Wang X,Ding H,Sun S J,et al.Preparation of a temperature-sensitive superhydrophobic self-cleaning SiO2-TiO2@PDMS coating with photocatalytic activity[J].Surface & Coatings Technology,2021,408:126853.
[18] Han L S,Guo Y M,Ning F H,et al.Lotus effect inspired hydrophobic strategy for stable Zn metal anodes[J].Advanced Materials,2023,36:2308086.
[19] Wang X,Ding H,Xu Z,et al.Preparation of a UV anti-aging and superhydrophobic self-cleaning coating by loading nano-rutile on sericite and being modified with HDTMS[J].Applied Clay Science,2024,247:107212.
[20] Yeom C,Kim Y.Purification of oily seawater/wastewater using superhydrophobic nano-silica coated mesh and sponge[J].Journal of Industrial & Engineering Chemistry,2016,40:47-53.
基金资助
雄安新区科技创新专项(2023XAGG0068);中国博士后科学基金面上资助(2023M743302)
PDF
