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石墨烯纳米片对低密度聚乙烯纳米复合材料的结构、形态及介电行为的影响

Effect of Graphene Nanoplatelets on the Structure, the Morphology, and the Dielectric Behavior of Low-Density Polyethylene Nanocomposites.

作者信息

Maniadi Athena, Vamvakaki Maria, Suchea Mirela, Tudose Ioan Valentin, Popescu Marian, Romanitan Cosmin, Pachiu Cristina, Ionescu Octavian N, Viskadourakis Zaharias, Kenanakis George, Koudoumas Emmanouel

机构信息

Department of Materials Science and Technology, University of Crete, Vassilika Voutes, 70013 Heraklion, Greece.

Center of Materials Technology and Photonics, Hellenic Mediterranean University (Former Technological Educational Institute of Crete), 71004 Heraklion, Greece.

出版信息

Materials (Basel). 2020 Oct 26;13(21):4776. doi: 10.3390/ma13214776.

DOI:10.3390/ma13214776
PMID:33114722
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7663708/
Abstract

The incorporation of graphene nanoplatelets (GnPs) within a polymer matrix can play an important role in the physical properties and the functionality of the composite material. Composites consisting of low-density polyethylene (LDPE) and GnPs of different concentrations were developed by mixing GnPs with a molten form of the polymeric matrix. The effect of the GnPs content on the morphological, structural, and electrical properties of the composites were investigated. As shown, graphene presence and its concentration significantly modified the polymer matrix properties, a behavior that can be employed for tailoring its applicability in electrical applications. It was found that the increase of the graphene platelets concentration seems to promote the formation of graphene agglomerates, air gaps, and inhomogeneities, while higher dielectric constant/lower dielectric losses can be achieved.

摘要

将石墨烯纳米片（GnPs）掺入聚合物基体中可在复合材料的物理性能和功能方面发挥重要作用。通过将GnPs与聚合物基体的熔融形式混合，制备了由低密度聚乙烯（LDPE）和不同浓度GnPs组成的复合材料。研究了GnPs含量对复合材料的形态、结构和电学性能的影响。如图所示，石墨烯的存在及其浓度显著改变了聚合物基体的性能，这种行为可用于调整其在电气应用中的适用性。研究发现，石墨烯片层浓度的增加似乎会促进石墨烯团聚体、气隙和不均匀性的形成，同时可实现更高的介电常数/更低的介电损耗。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74b1/7663708/68803dde2165/materials-13-04776-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74b1/7663708/5332f1f0f060/materials-13-04776-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74b1/7663708/b8816eccfbac/materials-13-04776-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74b1/7663708/0f27c65e1f4d/materials-13-04776-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74b1/7663708/84ecbabf1065/materials-13-04776-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74b1/7663708/6b7da3f8aaa2/materials-13-04776-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74b1/7663708/237690988235/materials-13-04776-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74b1/7663708/65b0c72b8e07/materials-13-04776-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74b1/7663708/be4f16f93d4e/materials-13-04776-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74b1/7663708/68803dde2165/materials-13-04776-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74b1/7663708/5332f1f0f060/materials-13-04776-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74b1/7663708/b8816eccfbac/materials-13-04776-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74b1/7663708/0f27c65e1f4d/materials-13-04776-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74b1/7663708/84ecbabf1065/materials-13-04776-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74b1/7663708/6b7da3f8aaa2/materials-13-04776-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74b1/7663708/237690988235/materials-13-04776-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74b1/7663708/65b0c72b8e07/materials-13-04776-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74b1/7663708/be4f16f93d4e/materials-13-04776-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74b1/7663708/68803dde2165/materials-13-04776-g009.jpg

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