Thomas Marta, Karasiewicz Joanna, Nowicka-Krawczyk Paulina, Olszyński Rafał M, Balcerzak Łucja, Frydrych Miłosz, Sztorch Bogna, Ślosarczyk Agnieszka
Faculty of Civil and Transport Engineering, Institute of Building Engineering, Poznan University of Technology, 60-965 Poznan, Poland.
Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznan, Poland.
Int J Mol Sci. 2025 May 23;26(11):5052. doi: 10.3390/ijms26115052.
This study tested the effectiveness of a bifunctional polysiloxane (L43) as a means of protecting concrete surfaces from biocorrosion. L43 was designed to contain two types of functional groups in its structure: surface-active hydrophobic chains and hydrophilic groups that allow the coating to permanently bond to the concrete. L43-coated cement samples achieved compressive strengths exceeding 70 MPa, while samples subjected to cyclic freeze-thaw tests achieved compressive strengths exceeding 33 MPa. In addition, compound L43 at a concentration of 5% reduced the photosynthetic activity of microalgae cells on the concrete surface. The maximum value of chlFI decreased by 69.5%, while the average value decreased by 71.4%. Thus, it was proven that compound L43 effectively counteracts biological corrosion without deteriorating the structure of the impregnated substrate. It should be emphasized that the biocidal effect is due to the structure of the siloxane compound and appropriately selected functional groups. There is no need to add harmful biocides, making the solution environmentally friendly. In addition, the coating allows for free air circulation, which is crucial for the protection of building and construction materials.
本研究测试了一种双功能聚硅氧烷（L43）作为保护混凝土表面免受生物腐蚀手段的有效性。L43的结构设计包含两种功能基团：表面活性疏水链和亲水基团，使涂层能够永久粘结到混凝土上。涂有L43的水泥样品抗压强度超过70MPa，而经受循环冻融试验的样品抗压强度超过33MPa。此外，浓度为5%的化合物L43降低了混凝土表面微藻细胞的光合活性。chlFI的最大值下降了69.5%，平均值下降了71.4%。因此，证明了化合物L43能有效抵抗生物腐蚀，而不会破坏浸渍基材的结构。应当强调的是，杀菌效果归因于硅氧烷化合物的结构和适当选择的官能团。无需添加有害杀菌剂，使该解决方案环保。此外，该涂层允许自由空气流通，这对建筑和建筑材料的保护至关重要。
