聚氯乙烯遗产物中邻苯二甲酸酯增塑剂的迁移：力学与环境方面
Migration of phthalate plasticisers in heritage objects made of poly(vinyl chloride): mechanical and environmental aspects
AI总结：
研究增塑PVC文物中邻苯二甲酸酯增塑剂的迁移机制，通过分子动力学模拟和NMR扩散测量提出基于摩尔质量的迁移相关性，并评估表面清洁对加速迁移的风险，为保护提供非破坏性鉴定与量化方案。
摘要：
清洁还是不清洁？这一困境的解决方案与理解增塑剂迁移有关，这对增塑聚氯乙烯（PVC）制成的博物馆文物及其附近存放物品的状态具有实际意义。该过程的影响包括因渗出物和灰尘沉积引起的美学变化、空气污染增加以及机械应力的发展。因此，本文讨论了PVC中增塑剂的迁移，以提供证据并支持为保护人员、藏品管理者和遗产科学家制定建议和指南。特别地，研究聚焦于邻苯二甲酸酯的迁移，这是PVC藏品中最丰富的增塑剂组。内部扩散或表面排放（蒸发）的主导地位决定了整体迁移过程的限速步骤，这被认为是理解潜在环境和机械风险的基础。根据这一概念，借助分子动力学模拟和NMR扩散测量，提出了各种邻苯二甲酸酯基于其摩尔质量的通用相关性。研究表明，对于藏品中的大多数PVC物体，温和去除表面增塑剂渗出物后加速迁移的风险较低。因此，表面清洁可以减少博物馆环境中邻苯二甲酸酯排放物体的灰尘沉积和空气污染。考虑到简单性和快速决策支持解决方案的需求，提出了用于非破坏性鉴定和量化由增塑PVC制成或含有增塑PVC的物体中增塑剂、确定所研究文物的物理状态以及增塑剂迁移限速步骤的分步协议。
英文摘要：
To clean or not to clean? The solution to this dilemma is related to understanding the plasticiser migration which has a few practical implications for the state of museum artefacts made of plasticised poly(vinyl chloride) - PVC and objects stored in their vicinity. The consequences of this process encompass aesthetic changes due to the presence of exudates and dust deposition, an increase in air pollution and the development of mechanical stresses. Therefore, this paper discusses the plasticiser migration in PVC to provide evidence and support the development of recommendations and guidelines for conservators, collection managers and heritage scientists. Particularly, the investigation is focused on the migration of the ortho-phthalates representing the group of the most abundant plasticisers in PVC collections. The predominance of inner diffusion or surface emission (evaporation) determining the rate-limiting step of the overall migration process is considered a fundament for understanding the potential environmental and mechanical risk. According to this concept, general correlations for various ortho-phthalates are proposed depending on their molar mass with the support of molecular dynamics simulations and NMR diffusometry. The study reveals that for the majority of the PVC objects in collections, the risk of accelerated migration upon mild removal of surface plasticiser exudate is low. Thus, surface cleaning would allow for diminishing dust deposition and air pollution by phthalate-emitting objects in a museum environment. Bearing in mind simplicity and the need for fast decision-supporting solutions, the step-by-step protocol for non-destructive identification and quantification of plasticisers in objects made of or containing plasticised PVC, determination of the physical state of investigated artefacts and rate-limiting process of plasticiser migration is proposed.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
