Antifungal effect of different methyl and propyl paraben mixtures on the treatment of paper biodeterioration.
Antifungal effect of different methyl and propyl paraben mixtures on the treatment of paper biodeterioration.
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DOI：
10.1016/j.ibiod.2008.07.011
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发表时间：
2009-04
影响因子：
4.8
通讯作者：
Eva Raquel Neves;S. Schäfer;A. Phillips;J. Canejo;M. F. Macedo
中科院分区：
文献类型：
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作者：
Eva Raquel Neves;S. Schäfer;A. Phillips;J. Canejo;M. F. Macedo
由于许多重要的艺术作品和文件是由纸制成的，因此容易受到真菌的生物降解，因此需要研究用其他更良性的化学产品取代有毒的化学产品。研究了不同浓度对羟基苯甲酸甲酯和丙酯混合物的抑菌效果。实验中使用的真菌是枝孢菌和棒状青霉菌，这两种真菌都是众所周知的纸张生物降解真菌。结果表明，0.5%对羟基苯甲酸甲酯和1%对羟基苯甲酸丙酯的混合物，在85%乙醇溶液中，是提供有效抗真菌作用所需的最低浓度。在此混合物中加入5%丙酸钙脱酸剂，形成一种多用途配方，用于处理纸质文件的酸化和真菌污染。在使用该混合物前后对纸样进行的测试表明，在大幅提高pH值（从而提高碱性储备）的同时，黄变仅略有增加，抗拉强度略有下降，变形百分比也略有增加。
With many important artistic works and documents made of paper, and thus susceptible to biodeterioration by fungi, research is required in an effort to replace toxic chemical products with other more benign ones. In this work the antifungal effect of methyl and propyl paraben mixtures at different concentrations was evaluated. The fungi used in the experiments were a Cladosporium species and Penicillium corylophilum, both of which are well known as paper-biodeteriorating fungi. The results demonstrate that a mixture of 0.5% methyl paraben and 1% propyl paraben, in 85% ethanolic solution, is the lowest concentration necessary to provide an efficient antifungal action. A deacidification agent, 5% calcium propionate, was added to this mixture to produce a multi-purpose formulation to treat acidification and fungal contamination of paper documents. Tests carried out on paper samples before and after application of this mixture showed only a minor increase in yellowing and a slight decrease in tensile strength, while substantially raising the pH, and thus the alkaline reserve, and also a slight increase in the percentage of deformation.