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紫外线辐照的石墨烯基纳米复合材料：通过局部谐波X原子力显微镜检测的力学性能变化

UV Irradiated Graphene-Based Nanocomposites: Change in the Mechanical Properties by Local HarmoniX Atomic Force Microscopy Detection.

作者信息

Guadagno Liberata, Naddeo Carlo, Raimondo Marialuigia, Speranza Vito, Pantani Roberto, Acquesta Annalisa, Carangelo Anna, Monetta Tullio

机构信息

Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, Salerno, 84084 Fisciano, Italy.

Department of Chemical Engineering, Materials and Industrial Production, University of Napoli Federico II, Piazzale Tecchio 80, 80125 Napoli, Italy.

出版信息

Materials (Basel). 2019 Mar 22;12(6):962. doi: 10.3390/ma12060962.

DOI:10.3390/ma12060962
PMID:30909458
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6470810/
Abstract

Epoxy based coatings are susceptible to ultra violet (UV) damage and their durability can be significantly reduced in outdoor environments. This paper highlights a relevant property of graphene-based nanoparticles: Graphene Nanoplatelets (GNPs) incorporated in an epoxy-based free-standing film determine a strong decrease of the mechanical damages caused by UV irradiation. The effects of UV light on the morphology and mechanical properties of the solidified nanocharged epoxy films are investigated by Atomic Force Microscopy (AFM), in the acquisition mode "HarmoniX." Nanometric-resolved maps of the mechanical properties of the multi-phase material evidence that the incorporation of low percentages, between 0.1% and 1.0% by weight, of graphene nanoplatelets (GNPs) in the polymeric film causes a relevant enhancement in the mechanical stability of the irradiated films. The beneficial effect progressively increases with increasing GNP percentage. The paper also highlights the potentiality of AFM microscopy, in the acquisition mode "HarmoniX" for studying multiphase polymeric systems.

摘要

环氧基涂层易受紫外线（UV）损伤，在户外环境中其耐久性会显著降低。本文重点介绍了基于石墨烯的纳米颗粒的一种相关特性：掺入环氧基独立膜中的石墨烯纳米片（GNPs）能显著减少紫外线照射引起的机械损伤。通过原子力显微镜（AFM）在“HarmoniX”采集模式下，研究了紫外线对固化纳米充电环氧膜的形态和力学性能的影响。多相材料力学性能的纳米级分辨图谱表明，在聚合物膜中掺入0.1%至1.0%重量百分比的低含量石墨烯纳米片（GNPs）会使辐照膜的机械稳定性得到显著提高。随着GNP百分比的增加，这种有益效果逐渐增强。本文还强调了AFM显微镜在“HarmoniX”采集模式下研究多相聚合物体系的潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9f9e/6470810/c3354469026e/materials-12-00962-g019.jpg
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