Hao Jian, Yu Liyan, Cui Yongmei, Wan Wen, Huang Junyi
Department of Chemistry, Shanghai University Shanghai 200444 P. R. China
Institute for the Conservation of Cultural Heritage, Shanghai University Shanghai 200444 P. R. China.
RSC Adv. 2021 May 12;11(28):17399-17407. doi: 10.1039/d0ra10434e. eCollection 2021 May 6.
A micron-thick (3-5 μm) and transparent cladding technique based on the environment friendly dimethyl carbonate solution of newly developed polyfluorosilicone acrylates was successfully applied to restore the surface of brick walls of a historic house which has been severely eroded by damp and mildew for more than 300 years in Hongcun village, one of the World Heritage sites in China. The restoration followed the rule of repairing old as old before. The cladding made from the copolymerized polyfluorosilicone acrylate resin, which mainly contained the chain fragments of dodecafluoroheptyl methacrylate and 3-(trimethoxysilyl)propyl methacrylate, permeated through the surface of old brick with an average depth of 14.5 mm in this case study, and provided an ultrathin and efficient covering of the microstructure of the shallow surface layer of old bricks and resulted excellent water-proof, moisture-proof, mildew-proof and long-lasting weather resistance effects. The water contact angle of the treated surface of the old bricks reached 133°, the water absorption of treated bricks was reduced from 16.1 wt% to 2.8 wt% after soaking in water for 24 h.
一种基于新开发的聚氟硅氧烷基丙烯酸酯的环保碳酸二甲酯溶液的微米级厚度（3-5μm）透明包覆技术，成功应用于修复宏村一座历史建筑的砖墙表面。宏村是中国世界遗产地之一，这座历史建筑的砖墙因潮湿和霉菌侵蚀已达300多年。修复遵循修旧如旧的原则。在本案例研究中，由共聚聚氟硅氧烷基丙烯酸酯树脂制成的包覆层，其主要包含甲基丙烯酸十二氟庚酯和甲基丙烯酸3-(三甲氧基硅基)丙酯的链段，渗透到旧砖表面，平均深度为14.5mm，为旧砖浅表层的微观结构提供了超薄且有效的覆盖，并产生了优异的防水、防潮、防霉和持久耐候效果。处理后的旧砖表面水接触角达到133°，浸泡24小时后，处理后砖的吸水率从16.1wt%降至2.8wt%。
