Moradienayat Monireh, González-Benito Javier, Olmos Dania
Department of Materials Science and Engineering and Chemical Engineering, Instituto de Químicay Materiales Álvaro Alonso Barba (IQMAA), Universidad Carlos III de Madrid, 28911 Leganés, Spain.
Nanomaterials (Basel). 2023 Feb 4;13(4):625. doi: 10.3390/nano13040625.
In this work, the preparation and characterization of films based on polysulfone (PSF) filled with zinc oxide, ZnO, nanoparticles (NPs) are conducted. The novelty of this research mainly relies on two points: (i) the use of a commercial airbrush to prepare or modify materials, and (ii) the design of new materials (nanocomposites) for the consolidation and restoration of historical bones. To accomplish these objectives, free-standing thin films and ancient bone coatings of PSF/ZnO nanocomposites with different particle contents (0%, 1%, 2%, 5% and 10%, % wt) are prepared using a commercial airbrush. Mechanical characterization is carried out to correlate properties between free-standing thin films and coatings, thus understanding the final performance of the coatings as consolidants for ancient bones. Thin films of PSF/ZnO show that the elastic modulus (E) increases with particle content. The mechanical behavior of the surfaces of the treated and untreated bones is studied locally using Martens hardness measurements. Maximum values of Martens hardness are obtained for the bone samples treated with polysulfone filled with 1% ZnO nanoparticles (HM = 850 N·mm) or 2% ZnO (HM = 625 N·mm) compared to those treated just with neat PSF (HM = 282 N·mm) or untreated bone (HM = 140 N·mm), indicating there is a correspondence between rigidity of free-standing films and hardness of the corresponding coatings. In terms of mechanical performance, it is demonstrated the existence of a balance between nanoparticle concentration and probability of nanoparticle aggregation, which allows better material design for ancient bones consolidation.
在这项工作中，开展了基于填充有氧化锌（ZnO）纳米颗粒（NPs）的聚砜（PSF）薄膜的制备与表征。本研究的新颖之处主要基于两点：（i）使用商用喷枪制备或改性材料；（ii）设计用于历史骨骼加固和修复的新材料（纳米复合材料）。为实现这些目标，使用商用喷枪制备了具有不同颗粒含量（0%、1%、2%、5%和10%，重量百分比）的PSF/ZnO纳米复合材料的自支撑薄膜和古代骨骼涂层。进行力学表征以关联自支撑薄膜和涂层之间的性能，从而了解涂层作为古代骨骼加固剂的最终性能。PSF/ZnO薄膜表明，弹性模量（E）随颗粒含量增加。使用马氏体硬度测量局部研究处理过和未处理过的骨骼表面的力学行为。与仅用纯PSF处理的骨骼样品（HM = 282 N·mm）或未处理的骨骼（HM = 140 N·mm）相比，用填充1% ZnO纳米颗粒的聚砜处理的骨骼样品（HM = 850 N·mm）或2% ZnO处理的骨骼样品（HM = 625 N·mm）获得了最大马氏体硬度值，表明自支撑薄膜的刚性与相应涂层的硬度之间存在对应关系。在力学性能方面，证明了纳米颗粒浓度与纳米颗粒聚集概率之间存在平衡，这有助于为古代骨骼加固进行更好的材料设计。
