Poly(vinyl alcohol)-Borate Hydro/Cosolvent Gels: Viscoelastic Properties, Solubilizing Power, and Application to Art Conservation

被引：100

作者：

Carretti, Emiliano ^{[1
,2
]}

Grassi, Scilla ^{[1
,2
]}

Cossalter, Manuela ^{[1
,2
]}

Natali, Irene ^{[1
,2
]}

Caminati, Gabriella ^{[1
,2
]}

Weiss, Richard G. ^{[3
]}

Baglioni, Piero ^{[1
,2
]}

Dei, Luigi ^{[1
,2
]}

机构：

[1] Univ Florence, Dept Chem, I-50019 Florence, Italy

[2] Univ Florence, CSGI Consortium, I-50019 Florence, Italy

[3] Georgetown Univ, Dept Chem, Washington, DC 20057 USA

来源：

LANGMUIR | 2009年 / 25卷 / 15期

基金：

美国国家科学基金会;

关键词：

DYNAMIC LIGHT-SCATTERING; HYDROGEL; RELEASE; WATER; IMMOBILIZATION; POLYMERS; RHEOLOGY; ACID;

D O I：

10.1021/la804306w

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

We report the development of a new type of hydrogel in which a cosolvent has been added to the water component. The get networks are based on the well-known poly(vinyl alcohol)-borate systems (PVA-borate). However, it is shown that the rheological and solubilizing properties of the hydrogels can be modified drastically by the addition of a cosolvent. The studies have focused on 1-propanol as the added liquid, although it is shown that others (propylene carbonate, I-pentanol, cyclohexanone, and 2-butanol) are amenable to making modified hydrogels as well. In addition to the rheological measurements, the gels have been investigated by differential scanning calorimetry (free water index) and determination of their solubilizing power. Finally, the gels have been applied to clean and oxidized varnish (patina) from the surface of a XVI-XVII century oil-on-wood painting by Ludovico Cardi detto it Cigoli. The mode of cleaning by and removal of the PVA-borate water/1-propanol gel from the painted surface demonstrate several advantages over other gels used in art conservation.

引用

页码：8656 / 8662

页数：7

共 46 条

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