Thermomechanical Properties and Fracture Toughness Improvement of Thermosetting Vinyl Ester Using Liquid Metal and Graphene Nanoplatelets.
Thermomechanical Properties and Fracture Toughness Improvement of Thermosetting Vinyl Ester Using Liquid Metal and Graphene Nanoplatelets.
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DOI：
10.3390/polym14245397
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发表时间：
2022-12-09
期刊：
影响因子：
5
通讯作者：
Sbarski I
中科院分区：
文献类型：
--
作者：
Dang TKM;Nikzad M;Truong VK;Masood S;Nguyen CK;Sbarski I
在这项研究中，共晶镓铟（EGaIn）合金和石墨烯纳米片（GNP）作为增强的共聚单体乙烯基酯（cVE）树脂在不同的重量分数高达2%，通过直接聚合过程。首先，评估EGaIn对cVE的固化动力学的影响。然后研究了由EGaIn和GNP组成的两种类型的cVE复合材料的热性能和机械性能以及断裂韧性。结果表明，亚微米尺寸的EGaIn（≤1 wt.%）在不改变cVE固化机理的前提下，可促进cVE的固化反应。然而，随着EGaIn负载量在1和2 wt.%之间的进一步增加，固化反应速率趋于降低。EGaIn和GNP都显示出显著的增强，在强化和增韧的cVE基质的存在下，填料加载量高达1重量%。EGaIn比GNP更有效地促进弯曲和冲击强度。当使用EGaln时，这些机械性能记录了高达50%和32%的增加，而GnPs分别为46%和18%。相比之下，GNP/cVE复合材料表现出更大的改善，断裂韧性和断裂能分别高达50%和56%相比，EGaIn/cVE的高达32%和39%，分别。此外，EgaIn/cVE和GnPs/cVE复合材料的刚度显示出显着的改善，分别增加了1.76和1.83倍的归一化储能模量，而玻璃化转变温度（Tg）值保持相对恒定。这项工作突出了EGaIn作为填料在创造高性能热固性复合材料中的潜力，这有助于其在许多结构和工程领域的广泛应用，这些领域需要更高的韧性和刚度。
In this study, a eutectic gallium–indium (EGaIn) alloy and graphene nanoplatelets (GnPs) were employed as reinforcements for a comonomer vinyl ester (cVE) resin at different weight fractions up to 2% via a direct polymerization process. First, the effect of EGaIn on the curing kinetics of cVE was evaluated. The thermal and mechanical properties, and the fracture toughness of two types of cVE composites consisting of EGaIn and GnPs were then studied. The results showed that sub-micron sized EGaIn (≤1 wt.%) could promote the curing reaction of cVE without changing the curing mechanism. However, with further increases in EGaIn loading between 1 and 2 wt.%, the curing reaction rate tends to decrease. Both EGaIn and GnPs showed a significant enhancement in strengthening and toughening the cVE matrix with the presence of filler loading up to 1 wt.%. EGaIn was more effective than GnPs in promoting the flexural and impact strength. An increase of up to 50% and 32% were recorded for these mechanical properties, when EGaln was used, as compared to 46%, and 18% for GnPs, respectively. In contrast, the GnPs/cVE composites exhibited a greater improvement in the fracture toughness and fracture energy by up to 50% and 56% in comparison with those of the EGaIn/cVE ones by up to 32% and 39%, respectively. Furthermore, the stiffness of both the EgaIn/cVE and GnPs/cVE composites showed a significant improvement with an increase of up to 1.76 and 1.83 times in the normalized storage modulus, respectively, while the glass transition temperature (Tg) values remained relatively constant. This work highlights the potential of EGaIn being employed as a filler in creating high-performance thermoset composites, which facilitates its widening applications in many structural and engineering fields, where both higher toughness and stiffness are required.
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影响因子：
4.6
作者：
Chan, CM;Wu, JS;Cheung, YK
通讯作者：
Cheung, YK
DOI：
10.1016/b978-0-12-814548-7.00003-9
发表时间：
2019-01-01
期刊：
FUNCTIONALIZED GRAPHENE NANOCOMPOSITES AND THEIR DERIVATIVES: SYNTHESIS, PROCESSING AND APPLICATIONS
影响因子：
--
作者：
Bouhfid, Nabil;Raji, Marya;Qaiss, Abou el Kacem
通讯作者：
Qaiss, Abou el Kacem
影响因子：
6.3
作者：
Afshar, Arash;Liao, Heng-Tseng;Korach, Chad S.
通讯作者：
Korach, Chad S.
影响因子：
6.2
作者：
Idumah, Christopher Igwe;Obele, Chizoba M.
通讯作者：
Obele, Chizoba M.
影响因子：
5.1
作者：
Atta, Ayman M.;El-Saeed, Shymaa M.;Farag, Reem K.
通讯作者：
Farag, Reem K.