Preparation of high performance calcium oxalate protective film by multifunctional organic molecule on carbonate stones in dry environment

被引:0
|
作者
He, Lu [1 ]
Ma, Wenting [1 ]
Liu, Jiayi [1 ]
Liu, Yan [1 ]
Yang, Fuwei [1 ]
Zhang, Kun [1 ]
Jiang, Yijie [1 ]
机构
[1] Northwest Univ, Sch Culture Heritage, China Cent Asia Belt & Rd Joint Lab Human & Enviro, Key Lab Cultural Heritage Res & Conservat, Xian 710127, Peoples R China
关键词
Hydrophobic calcium oxalate film; Carbonate stone; Heritage protection; Ethylene glycol; Multifunctional organic molecule; SURFACE-ROUGHNESS; AMMONIUM PHOSPHATE; MARBLE; CONSOLIDATION; MONUMENTS;
D O I
10.1016/j.surfin.2024.104612
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Preparation of calcium oxalate film has been widely adopted in the protection of carbonate stone. However, the solution of oxalate acid or its derivative brushing on the carbonate stone usually evaporates quickly in dry environment, resulting in the inability to form a complete covering calcium oxalate film. Although expensive and difficult to operate, water retention procedures such as surface poultice and plastic wrap are often needful in this case. A novel method for the preparation of the calcium oxalate film with no need of water retention procedures was developed in this paper. The morphology, structure and performance of the calcium oxalate film prepared by above method were investigated by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), infrared spectroscopy (IR), X-ray diffraction (XRD), wetting angle, acid resistance, surface strength, porosity, water absorption and color difference. The experimental results showed that a calcium oxalate film with high performance can be prepared in dry environment when ethylene glycol was added into the oxalate acid solution as water retention agent even and the traditional water retention procedures are not necessary. This new method is of great enlightening significance for the protection of the immovable carbonate stones in the dry environment.
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页数:13
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