Revealing Localised Mechanochemistry of Biomaterials Using In Situ Multiscale Chemical Analysis.

Revealing Localised Mechanochemistry of Biomaterials Using In Situ Multiscale Chemical Analysis.
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DOI:
10.3390/ma15103462
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发表时间:
2022-05-11
期刊:
Materials (Basel, Switzerland)
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对受到外部应力的材料内部产生的机械和化学现象的研究称为机械化学 (MC)。 MC 的最新进展不仅揭示了化学转化的绿色途径,而且还为生物材料的生产和筛选提供了以前无法获得的机会。迄今为止,MC 领域一直受到当前表征技术无法提供必要的局部多尺度化学图谱信息的限制。克服这个问题的一种潜在方法是二次电子高光谱成像(SEHI)。 SEHI 是一种应用于扫描电子显微镜 (SEM) 的多尺度材料表征技术。 SEHI 基于低主束能量下二次电子 (SE) 发射光谱的收集,适用于未涂层聚合物表面的化学评估。在这里,我们证明 SEHI 可以使用聚(癸二酸甘油酯)-甲基丙烯酸酯(PGS-M)作为感兴趣的生物材料示例来提供原位 MC 信息。这项研究将定制的原位 SEM 支架与 SEHI 的应用结合起来,首次提供了增强的生物材料机械化学表征。
The study of mechanical and chemical phenomena arising within a material that is being subjected to external stress is termed mechanochemistry (MC). Recent advances in MC have revealed the prospect not only to enable a greener route to chemical transformations but also to offer previously unobtainable opportunities in the production and screening of biomaterials. To date, the field of MC has been constrained by the inability of current characterisation techniques to provide essential localised multiscale chemically mapping information. A potential method to overcome this is secondary electron hyperspectral imaging (SEHI). SEHI is a multiscale material characterisation technique applied within a scanning electron microscope (SEM). Based on the collection of secondary electron (SE) emission spectra at low primary beam energies, SEHI is applicable to the chemical assessment of uncoated polymer surfaces. Here, we demonstrate that SEHI can provide in situ MC information using poly(glycerol sebacate)-methacrylate (PGS-M) as an example biomaterial of interest. This study brings the use of a bespoke in situ SEM holder together with the application of SEHI to provide, for the first time, enhanced biomaterial mechanochemical characterisation.
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