Min Yao, Delong Chen, Ming Gui, Chengfei Zhu, Wenjuan Liu
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引用次数: 0
Abstract
Paper deacidification is one of the most important tasks in the conservation of cultural relics. Recently, fluorocarbon solvents which are safe, environment-friendly, and do not react with paper have attracted extensive attention and have been used as the deacidification solvent. However, as one of the most commonly used deacidification agents, the poor dispersibility of nano-MgO in organic solvent has greatly restricted the paper deacidification effect. Herein, by introducing polyvinylpyrrolidone (PVP, K30) as a guiding agent during the process of nano-MgO electrolysis synthesis, we enhanced the dispersibility of nano-MgO in fluorocarbon solvent (C5H3F9O) with stable suspension time extended to 1.5 h, then optimized deacidification performance of paper in Qing Dynasty. The nano-MgO immobilized with PVP (MgO/PVP) is flaky. Compared with MgO synthesized directly without surfactant, its suspension stability increased from 30 min to 1.5 h. Moreover, nano-MgO immobilized with PVP exhibited the best paper deacidification effect. Other than pH 7.8 and 7.9 in groups of MgO and MgO-PVP (PVP addition after MgO synthesis), the pH of the paper after deacidification reached 8.85 for MgO/PVP. In addition, tensile strength of the treated paper is increased 16.3% and the color of the paper is slightly influenced. Overall, We have improved the electrolysis method, and realized the uniform dispersion of nano-MgO in fluorocarbon solvent, which brought the good deacidification effect to the paper and had certain significance in the protection of cultural relics.
期刊介绍：
The objective of the Journal of Nanoparticle Research is to disseminate knowledge of the physical, chemical and biological phenomena and processes in structures that have at least one lengthscale ranging from molecular to approximately 100 nm (or submicron in some situations), and exhibit improved and novel properties that are a direct result of their small size.
Nanoparticle research is a key component of nanoscience, nanoengineering and nanotechnology.
The focus of the Journal is on the specific concepts, properties, phenomena, and processes related to particles, tubes, layers, macromolecules, clusters and other finite structures of the nanoscale size range. Synthesis, assembly, transport, reactivity, and stability of such structures are considered. Development of in-situ and ex-situ instrumentation for characterization of nanoparticles and their interfaces should be based on new principles for probing properties and phenomena not well understood at the nanometer scale. Modeling and simulation may include atom-based quantum mechanics; molecular dynamics; single-particle, multi-body and continuum based models; fractals; other methods suitable for modeling particle synthesis, assembling and interaction processes. Realization and application of systems, structures and devices with novel functions obtained via precursor nanoparticles is emphasized. Approaches may include gas-, liquid-, solid-, and vacuum-based processes, size reduction, chemical- and bio-self assembly. Contributions include utilization of nanoparticle systems for enhancing a phenomenon or process and particle assembling into hierarchical structures, as well as formulation and the administration of drugs. Synergistic approaches originating from different disciplines and technologies, and interaction between the research providers and users in this field, are encouraged.
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