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包含有机功能化CeO纳米颗粒的醋酸纤维素:用于紫外线过滤应用的高效材料。

Cellulose Acetate Incorporating Organically Functionalized CeO NPs: Efficient Materials for UV Filtering Applications.

作者信息

Culica Madalina Elena, Chibac-Scutaru Andreea L, Melinte Violeta, Coseri Sergiu

机构信息

"Petru Poni" Institute of Macromolecular Chemistry of Romanian Academy, 41 A, Grigore Ghica Voda Alley, 700487 Iasi, Romania.

出版信息

Materials (Basel). 2020 Jul 1;13(13):2955. doi: 10.3390/ma13132955.

DOI:10.3390/ma13132955
PMID:32630331
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7372434/
Abstract

One of the major issues faced when constructing various materials incorporating inorganic nanoparticles (NPs) is aggregation leading to loss of their final activity. In our work, cellulose acetate (CA) has been used to serve as matrix for the synthesis of UV-shielding and transparent films containing various amounts (1-5 wt.%) of cerium oxide (CeO) NPs. In order to attain an improved dispersion and a better connectivity between NPs and the cellulose matrix, the surface of CeO NPs have been previously functionalized by the reaction with 3-aminopropyl(diethoxy)methylsilane (APDMS). The uniform dispersion of the NPs in the homogeneous thin films has been evidenced by using Transmission Electron Microscopy (TEM) and Fourier Transformation Infrared Spectroscopy (FTIR) characterization. The investigation of the optical properties for the hybrid films through UV-Vis spectroscopy revealed that the presence of CeO NPs in the CA matrix determined the appearance of strong UV absorption bands in the region 312-317 nm, which supports their use as efficient UV absorbers. This study has shown that UV shielding ability of the nanocomposites can be easily tuned by adjusting the numberof inorganic NPs in the CA template.

摘要

在构建包含无机纳米颗粒(NPs)的各种材料时面临的主要问题之一是聚集,这会导致其最终活性丧失。在我们的工作中,醋酸纤维素(CA)已被用作基质,用于合成含有不同量(1 - 5 wt.%)氧化铈(CeO)纳米颗粒的紫外线屏蔽透明薄膜。为了实现纳米颗粒更好的分散以及纳米颗粒与纤维素基质之间更好的连接,CeO纳米颗粒的表面预先通过与3 - 氨丙基(二乙氧基)甲基硅烷(APDMS)反应进行了功能化处理。通过透射电子显微镜(TEM)和傅里叶变换红外光谱(FTIR)表征证明了纳米颗粒在均匀薄膜中的均匀分散。通过紫外 - 可见光谱对混合薄膜光学性质的研究表明,CA基质中CeO纳米颗粒的存在决定了在312 - 317 nm区域出现强紫外吸收带,这支持了它们作为高效紫外吸收剂的用途。这项研究表明,通过调整CA模板中无机纳米颗粒的数量,可以轻松调节纳米复合材料的紫外线屏蔽能力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3785/7372434/ae0ede35cdc2/materials-13-02955-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3785/7372434/4e091cd548a8/materials-13-02955-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3785/7372434/38d6162db984/materials-13-02955-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3785/7372434/e9cc249e07e5/materials-13-02955-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3785/7372434/8f967ffc3449/materials-13-02955-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3785/7372434/20b42e3aa499/materials-13-02955-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3785/7372434/8e7674d16151/materials-13-02955-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3785/7372434/e04f667136ae/materials-13-02955-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3785/7372434/4c694ea46967/materials-13-02955-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3785/7372434/a21a1d0d73f0/materials-13-02955-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3785/7372434/ae0ede35cdc2/materials-13-02955-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3785/7372434/4e091cd548a8/materials-13-02955-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3785/7372434/38d6162db984/materials-13-02955-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3785/7372434/e9cc249e07e5/materials-13-02955-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3785/7372434/8f967ffc3449/materials-13-02955-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3785/7372434/20b42e3aa499/materials-13-02955-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3785/7372434/8e7674d16151/materials-13-02955-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3785/7372434/e04f667136ae/materials-13-02955-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3785/7372434/4c694ea46967/materials-13-02955-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3785/7372434/a21a1d0d73f0/materials-13-02955-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3785/7372434/ae0ede35cdc2/materials-13-02955-g010.jpg

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