细菌纤维素结合多色光探针用于在纸质文化遗产中检测视觉酸度
Xu Zhang1, Jingjing Yao2, Yueer Yan1
1Institute for Preservation and Conservation of Chinese Ancient Books, Fudan University, Library, Fudan University, 220 Handan Road, Shanghai 200433, China.
ACS applied materials & interfaces
|September 11, 2024
概括
这项研究开发了一种新的光细菌纤维素膜,用于视觉检测纸张酸度. 膜使用量子点和罗达胺B探针准确地绘制文化遗迹中的酸度,有助于保存.
科学领域:
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
- 保护科学 保护科学
背景情况:
- 纸质文化遗迹由于酸化而退化,需要准确的酸度评估来保存.
- 目前用于检测纸张酸度的方法可能耗时且缺乏空间分辨率.
- 对纸张酸度分布的视觉和快速检测对于保护工作至关重要.
研究的目的:
- 开发一种可视和快速的方法来检测纸张的酸度及其分布.
- 使用细菌纤维素纳米纤维,量子点和B.罗达胺,创建一个pH敏感的复合膜.
- 评估开发的文化遗产保护方法的可行性和适用性.
主要方法:
- 合成的pH敏感 telluride (CdTe) 量子点 (QDs) 和罗达胺 B (RB) 光探针.
- 在细菌纤维素 (BC) 纳米纤维上嵌入 CdTe QD 和 RB 探针,形成复合膜.
- 利用探测器的互补pH检测范围和对比的光颜色进行视觉pH映射.
- 使用平头pH电极验证了方法的准确性,并评估了常见纸张组件的干扰.
主要成果:
- 复合BC膜在酸性到中性范围 (pH3.0-7.5) 中显示出明显的pH反应.
- 对比的光颜色使得裸眼可视化纸张的pH值和酸度分布.
- 在涂在pH梯度模型纸上的膜上观察到明显的红色到绿色的色彩转变.
- 从纸张中发现的常见金属离子,糖和氨基酸中观察到最小的干扰.
结论:
- 开发的光BC膜为检测纸张酸度提供了视觉,快速和准确的方法.
- 这项技术在评估纸质文化遗产的老化状态和指导其保存方面具有重大潜力.
- 该方法的广泛适用性得到了其对常见干扰物质的强度的支持.
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