Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The preservation damage of hydrophobic polymer coating materials in conservation of stone relics
The use of chemical materials to protect ancient stone relics is an effective method to prevent their weathering in outdoor conditions. At present, the typical materials for stone protection are mainly organic polymers, such as organic silicon compounds, fluorine-containing polymers and polyacrylates. These hydrophobic organic materials can play a protective role in the conservation of stone relics, but there are also some disadvantages. For example, the hydrophilic feature of stones and hydrophobic feature of organic conservation materials may cause stone damage by moisture expansion stress. In the present study, the damage mechanism of the interface between hydrophilic stone and hydrophobic conservation materials has been studied, including the effect of stone destructive factors: dry–wet cycles, freeze–thaw cycles and salt immersion. To prevent the damage by conservation materials, a multilayer method with hydrophilic bulk layer and hydrophobic surface layer is proposed. It is found that the multilayer method obviously reduces the degree of interface breakage. The reason is that there is a transition layer between hydrophobic and hydrophilic parts in the stones, which can disperse the stress of expansion and salt crystallization pressure near the interface.
The preservation damage of hydrophobic polymer coating materials in conservation of stone relics
The use of chemical materials to protect ancient stone relics is an effective method to prevent their weathering in outdoor conditions. At present, the typical materials for stone protection are mainly organic polymers, such as organic silicon compounds, fluorine-containing polymers and polyacrylates. These hydrophobic organic materials can play a protective role in the conservation of stone relics, but there are also some disadvantages. For example, the hydrophilic feature of stones and hydrophobic feature of organic conservation materials may cause stone damage by moisture expansion stress. In the present study, the damage mechanism of the interface between hydrophilic stone and hydrophobic conservation materials has been studied, including the effect of stone destructive factors: dry–wet cycles, freeze–thaw cycles and salt immersion. To prevent the damage by conservation materials, a multilayer method with hydrophilic bulk layer and hydrophobic surface layer is proposed. It is found that the multilayer method obviously reduces the degree of interface breakage. The reason is that there is a transition layer between hydrophobic and hydrophilic parts in the stones, which can disperse the stress of expansion and salt crystallization pressure near the interface.
The preservation damage of hydrophobic polymer coating materials in conservation of stone relics
Der Schutz vor Schaden durch hydrophobe Polymerbeshichtungsmaterialien bei der Konservierung von Steinresten
Zhang, Hui (Autor:in) / Liu, Qiang (Autor:in) / Liu, Ting (Autor:in) / Zhang, Bingjian (Autor:in)
Progress in Organic Coatings. An International Journal ; 76 ; 1127-1134
2013
8 Seiten, 16 Quellen
Aufsatz (Zeitschrift)
Englisch
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