Performance evolution of hydrophobic treatments for stone conservation investigated by MRI

被引：34

作者：

Borgia, GC

Bortolotti, V

Camaiti, M

Cerri, F

Fantazzini, P

Piacenti, F

机构：

[1] CNR, CS Cause Deperimento & Metodi Conserv Opere Arte, I-50127 Florence, Italy

[2] Univ Bologna, Dept ICMA, I-40136 Bologna, Italy

[3] Univ Bologna, Dept Phys, I-40127 Bologna, Italy

来源：

MAGNETIC RESONANCE IMAGING | 2001年 / 19卷 / 3-4期

关键词：

stone conservation; magnetic resonance; acrylic polymer; hydrophobic properties; ageing; polymer distribution;

D O I：

10.1016/S0730-725X(01)00281-8

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

H-1-MRI has been applied to the evaluation of the performances of a hydrophobic polymer (Paraloid B72), widely used for the conservation of monumental buildings and other stone artifacts. By this technique it has been possible to visualize the water diffusion in a treated rock material (Pietra di Lecce, a highly porous Italian biocalcarenite) and then indirectly the spatial distribution of the polymer in the rock. The effects of wetting-drying cycles on the hydrophobic efficacy of the acrylic polymer in the inner layers of the rock were also studied. A notable decrease in the water-repellence inside the stone was detected and attributed to a loss of adhesion of the polymer to the substrate, promoted by the action of water. (C) 2001 Elsevier Science Inc. All rights reserved.

引用

页码：513 / 516

页数：4

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