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单分散M-CeO/SiO纳米颗粒的合成及其用于形成紫外线吸收涂层。

The synthesis of monodispersed M-CeO/SiO nanoparticles and formation of UV absorption coatings with them.

作者信息

Xunwen Su, Liqun Zhu, Weiping Li, Huicong Liu, Hui Ye

机构信息

Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University Beijing 100191 China

Aerospace Research Institute of Materials and Processing Technology No. 1 South Dahongmen Road Beijing 100076 China

出版信息

RSC Adv. 2020 Jan 28;10(8):4554-4560. doi: 10.1039/c9ra08975f. eCollection 2020 Jan 24.

DOI:10.1039/c9ra08975f
PMID:35495236
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9049191/
Abstract

CeO/polymer nanoparticles have drawn considerable attention for their excellent UV absorption properties. However, many challenges still exist in the successful incorporation of ceria into the polymer matrix for the easy agglomeration and photocatalytic activity of CeO nanoparticles. Herein, we address these issues by constructing three-layer structured nanoparticles (M-CeO@SiO) and incorporating them into a polymer matrix through a mini-emulsion polymerization process. During this process, small-sized nano-ceria became uniformly anchored on the surfaces of monodisperse silica particles first, and then the particles were coated with an MPS/SiO shield. The morphology and dispersion of the nanoparticles were investigated using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The performance of the hybrid films was characterized using UV-vis absorption spectroscopy (UV-vis) and water contact angle (WCA) measurements. Results showed that the M-CeO@SiO nanoparticles exhibited a three-layer structure with a mean diameter of 360 nm, and they possess good compatibility with acrylic monomers. After the addition of M-CeO@SiO, hybrid films exhibited enhanced UV absorption capacity as expected, accompanied by an obvious improvement in hydrophobicity (the water contact angle increased from 84.2° to 98.2°). The results showed that the hybrid films containing M-CeO@SiO particles possess better global performance as compared with those containing no particles.

摘要

二氧化铈/聚合物纳米粒子因其优异的紫外线吸收性能而备受关注。然而，由于二氧化铈纳米粒子容易团聚且具有光催化活性，将二氧化铈成功掺入聚合物基体中仍存在许多挑战。在此，我们通过构建三层结构的纳米粒子（M-CeO@SiO）并通过微乳液聚合过程将其掺入聚合物基体中来解决这些问题。在此过程中，小尺寸的纳米二氧化铈首先均匀地锚定在单分散二氧化硅颗粒的表面，然后颗粒被MPS/SiO壳层包覆。使用扫描电子显微镜（SEM）和透射电子显微镜（TEM）研究了纳米粒子的形态和分散情况。使用紫外可见吸收光谱（UV-vis）和水接触角（WCA）测量对杂化膜的性能进行了表征。结果表明，M-CeO@SiO纳米粒子呈现出平均直径为360 nm的三层结构，并且它们与丙烯酸单体具有良好的相容性。添加M-CeO@SiO后，杂化膜如预期般表现出增强的紫外线吸收能力，同时疏水性明显提高（水接触角从84.2°增加到98.2°）。结果表明，与不含粒子的杂化膜相比，含有M-CeO@SiO粒子的杂化膜具有更好的整体性能。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3d78/9049191/0c093d8c3415/c9ra08975f-f8.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3d78/9049191/0c093d8c3415/c9ra08975f-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3d78/9049191/445959e45b27/c9ra08975f-f1.jpg
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