Three‐dimensional (3D) graphene aerogel (GA) with a spatial porous structure and network skeleton was facilely prepared via one‐step self‐assembly hydrothermal reduction. Such network structure is regarded as a critical advantage in resolving the dispersion of graphene in polymer matrix, thereby enhancing the damping property. Here, as‐prepared GA was added to the carboxylated butadiene nitrile rubber/polyurethane blend (XNBR/PU) by melting/mechanical complex method. Their dynamic mechanical properties were investigated in detail, and the relationship between thermal aging and dynamic mechanical properties had also been studied. Finding that the storage modulus and loss modulus of XNBR/PU were continually improved with the increase in addition amount of high‐performance GA, reaching 3,219 and 316 MPa with the content of 3 wt% GA, respectively. Loss factor (tanδ) of XNBR/PU with GA shows two sets of maximum values (0.22 and 0.61) at around −25 and 0.6°C, respectively. Results illustrate that GA can greatly improve the damping performance, damping temperature range, mechanical properties, and thermal aging resistance of XNBR/PU blend, mainly depending on the performance characteristics of GA and interface interaction between GA and XNBR/PU. Verifying that GA with 3D network structure holds a great prospect for damping materials. POLYM. ENG. SCI., 60:61–70, 2020. © 2019 Society of Plastics Engineers

中文翻译：

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探讨三维石墨烯气凝胶在羧化丁腈橡胶/聚氨酯共混物中的阻尼性能

通过一步自组装水热还原可轻松制备具有空间多孔结构和网络骨架的三维（3D）石墨烯气凝胶（GA）。这种网络结构被认为是解决石墨烯在聚合物基质中的分散从而增强阻尼性能的关键优势。在这里，通过熔融/机械复合法将制得的GA加入到羧化丁二烯丁腈橡胶/聚氨酯共混物（XNBR / PU）中。详细研究了它们的动态力学性能，并研究了热老化与动态力学性能之间的关系。发现随着高性能GA的添加量的增加，XNBR / PU的储能模量和损耗模量不断提高，当GA的含量为3 wt％时，XNBR / PU的储能模量和损耗模量分别达到3219和316 MPa。带有GA的XNBR / PU的损耗因数（tanδ）分别在-25°C和0.6°C时显示出两组最大值（0.22和0.61）。结果表明，GA可以极大地改善XNBR / PU共混物的阻尼性能，阻尼温度范围，力学性能和耐热老化性，这主要取决于GA的性能特征以及GA与XNBR / PU之间的界面相互作用。验证具有3D网络结构的GA在阻尼材料方面具有广阔的前景。POLYM。ENG。SCI。，60：61–70，2020.©2019塑料工程师协会 主要取决于GA的性能特征以及GA与XNBR / PU之间的接口交互作用。验证具有3D网络结构的GA在阻尼材料方面具有广阔的前景。POLYM。ENG。SCI。，60：61–70，2020.©2019塑料工程师协会 主要取决于GA的性能特征以及GA与XNBR / PU之间的接口交互作用。验证具有3D网络结构的GA在阻尼材料方面具有广阔的前景。POLYM。ENG。SCI。，60：61–70，2020.©2019塑料工程师协会