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热还原氧化石墨烯/聚乙烯纳米复合材料：氧化石墨烯对聚乙烯等温及非等温结晶的影响

Thermally reduced graphene/polyethylene nanocomposites: effects of graphene on isothermal and nonisothermal crystallization of polyethylene.

作者信息

Abuibaid Ahmed Z A, Iqbal Muhammad Z

机构信息

Department of Chemical and Petroleum Engineering, United Arab Emirates University, PO Box 15551, Al-Ain, United Arab Emirates.

出版信息

Heliyon. 2020 Mar 17;6(3):e03589. doi: 10.1016/j.heliyon.2020.e03589. eCollection 2020 Mar.

DOI:10.1016/j.heliyon.2020.e03589
PMID:32195403
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7078567/
Abstract

The crystallization behavior of polyethylene/thermally reduced graphene (PE/TRG) nanocomposites prepared via solvent blending is investigated using a differential scanning calorimeter, and results are compared with PE/carbon black (CB) composites. The effects of TRG and CB concentrations on the crystallization process are studied under isothermal and dynamic conditions. The Avrami and modified Avrami equations provided excellent fits to isothermal and dynamic crystallization kinetics data, respectively. The TRG nanosheets acted as nucleating agents during crystallization attributed to substantial decrease in crystallization half time at higher TRG concentrations. The reduced surface energy of the nanocomposites with incorporation of TRG further confirmed its nucleating behavior.

摘要

采用差示扫描量热仪研究了通过溶剂共混制备的聚乙烯/热还原氧化石墨烯（PE/TRG）纳米复合材料的结晶行为，并将结果与聚乙烯/炭黑（CB）复合材料进行了比较。在等温及动态条件下研究了TRG和CB浓度对结晶过程的影响。Avrami方程和修正的Avrami方程分别很好地拟合了等温及动态结晶动力学数据。在结晶过程中，TRG纳米片充当了成核剂，这归因于在较高TRG浓度下结晶半衰期大幅缩短。加入TRG后纳米复合材料表面能的降低进一步证实了其成核行为。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7740/7078567/796db63a857f/gr5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7740/7078567/8747d9d2c5a7/gr1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7740/7078567/2111514230ae/gr2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7740/7078567/bae2d1caf417/gr3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7740/7078567/87b38bc04981/gr4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7740/7078567/796db63a857f/gr5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7740/7078567/8747d9d2c5a7/gr1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7740/7078567/2111514230ae/gr2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7740/7078567/bae2d1caf417/gr3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7740/7078567/87b38bc04981/gr4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7740/7078567/796db63a857f/gr5.jpg

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本文引用的文献

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