Thermal, Mechanical, and Morphological Characterisations of Graphene Nanoplatelet/Graphene Oxide/High-Hard-Segment Polyurethane Nanocomposite: A Comparative Study.
Thermal, Mechanical, and Morphological Characterisations of Graphene Nanoplatelet/Graphene Oxide/High-Hard-Segment Polyurethane Nanocomposite: A Comparative Study.
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DOI：
10.3390/polym14194224
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发表时间：
2022-10-09
期刊：
影响因子：
5
通讯作者：
Saiani A
中科院分区：
文献类型：
--
作者：
Albozahid M;Naji HZ;Alobad ZK;Wychowaniec JK;Saiani A
目前的工作研究了在高硬段聚氨酯（75% HS）中添加石墨烯纳米片（GNP）和氧化石墨烯（GO）对其热性能、形态和机械性能的影响。采用不同比例的 GNP 和 GO（0.25、0.5 和 0.75 wt.%）制备聚氨酯（PU）及其纳米复合材料。热稳定性分析表明，与纯 PU 相比，掺入 GNP 和 GO 的 PU 的热稳定性有所增强。差示扫描量热法 (DSC) 显示，GNP 和 GO 均在 PU 基质中充当异质成核剂，导致 PU 结晶度增加。 SEM 和 TEM 证实了 GNP 和 GO 薄片在 PU 基体中的均匀分散和分布。在PU纳米复合材料的机械性能方面，由于GO表面的官能团，PU和GO之间的相互作用比GNP更好。与纯 PU 相比，0.5 wt.% GNP 和 GO 的拉伸强度显着增加。这可归因于 GO 和 PU 链之间的界面相互作用，从而改善了从基体到填料的应力传递，反之亦然。这项工作有助于理解石墨烯基填料之间的相互作用及其对 PU 纳米复合材料机械性能的影响。
The current work investigates the effect of the addition of graphene nanoplatelets (GNPs) and graphene oxide (GO) to high hard-segment polyurethane (75% HS) on its thermal, morphological, and mechanical properties. Polyurethane (PU) and its nanocomposites were prepared with different ratios of GNP and GO (0.25, 0.5, and 0.75 wt.%). A thermal stability analysis demonstrated an enhancement in the thermal stability of PU with GNP and GO incorporated compared to pure PU. Differential Scanning Calorimetry (DSC) showed that both GNP and GO act as heterogeneous nucleation agents within a PU matrix, leading to an increase in the crystallinity of PU. The uniform dispersion and distribution of GNP and GO flakes in the PU matrix were confirmed by SEM and TEM. In terms of the mechanical properties of the PU nanocomposites, it was found that the interaction between PU and GO was better than that of GNP due to the functional groups on the GO’s surface. This leads to a significant increase in tensile strength for 0.5 wt.% GNP and GO compared with pure PU. This can be attributed to interfacial interaction between the GO and PU chains, resulting in an improvement in stress transferring from the matrix to the filler and vice versa. This work sheds light on the understanding of the interactions between graphene-based fillers and their influence on the mechanical properties of PU nanocomposites.
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影响因子：
1.7
作者：
Albozahid, Muayad;Naji, Haneen Zuhair;Saiani, Alberto
通讯作者：
Saiani, Alberto
影响因子：
3.9
作者：
Chen, Junjie;Liu, Baofang;Gao, Xuhui;Xu, Deguang
通讯作者：
Xu, Deguang
影响因子：
2.3
作者：
Bernard, C.;Goodwin, D. G., Jr.;Nguyen, T.
通讯作者：
Nguyen, T.
影响因子：
2.7
作者：
Albozahid, Muayad;Naji, Haneen Zuhair;Saiani, Alberto
通讯作者：
Saiani, Alberto
影响因子：
15.1
作者：
Habibpour, Saeed;Um, Jun Geun;Yu, Aiping
通讯作者：
Yu, Aiping