In situ and frontal polymerization for the consolidation of porous stones: a unilateral NMR and magnetic resonance imaging study.
Consolidation treatment of porous materials was performed by in situ and frontal polymerization of acrylic monomers inside a porous stone. To study the penetration of the polymer inside the stone and its consolidating effects we used water as a contrast agent, detecting its penetration using unilateral NMR and magnetic resonance imaging. All data obtained on differently treated stones were compared with corresponding ones obtained analyzing both untreated stones and stones simply painted with a well-known polymeric protective agent. In situ polymerization of acrylic monomers inside porous stones has been demonstrated to be an extremely powerful consolidating method, whereas thermally initiated frontal polymerization seems less efficient. In both cases the optimal choice of monomers is still open and requires further study. Our data indicate that unilateral NMR represents an inexpensive and simple technique for the non-invasive observation of the water uptake and of the effect of consolidation procedures in porous materials.
Proietti
Noemi
N
Institute of Chemical Methodologies, CNR, Research Area of Rome, 00016 Monterotondo Stazione, Rome, Italy.
Capitani
Donatella
D
Cozzolino
Sara
S
Valentini
Massimiliano
M
Pedemonte
Enrico
E
Princi
Elisabetta
E
Vicini
Silvia
S
Segre
Anna Laura
AL
D000179:Acrylates / Q000737:chemistry*; D003252:Construction Materials; D008279:Magnetic Resonance Imaging; D009682:Magnetic Resonance Spectroscopy; D011108:Polymers / Q000737:chemistry*; D016062:Porosity
D000179:Acrylates; D011108:Polymers