Effects of coupling graft graphene fluid on modifying asphalt binders: Preparation, characterization and performance validation
Effects of coupling graft graphene fluid on modifying asphalt binders: Preparation, characterization and performance validation
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DOI：
10.1016/j.cscm.2023.e02165
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发表时间：
2023-07
影响因子：
6.2
通讯作者：
Jun Cai;Wangzhou Li;Zhihua Wang;Huanan Yu;Rui Li;Chengchao Wang
中科院分区：
文献类型：
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作者：
Jun Cai;Wangzhou Li;Zhihua Wang;Huanan Yu;Rui Li;Chengchao Wang
无机纳米材料被广泛研究用于改性沥青结合料。但由于其相容性差、粘度高等问题尚未得到很好的解决，限制了其进一步的应用。为了突破这一局限，本研究提出了一种新的接枝方法来优化氧化石墨烯（GO）的表面特性，并发现改性后的GO作为改性剂可以显著改善上述问题。采用两步接枝法成功制备了偶联接枝石墨烯流体（CG-GF），并通过傅立叶红外光谱（FT-IR）、扫描电镜（SEM）、能谱（EDS）、热重分析（TG）、分散性和流动性测试等手段对CG-GF的性能进行了研究。再次，将制备的CG-GF用于改性纯沥青结合料（A-90），验证了CG-GF改性沥青结合料（CMAB）的综合性能。结果表明，改性粘结剂在135 °C以上粘度没有显著增加，相容性没有减弱。本文的意义在于提出了一种可行的无机纳米材料改性方法，拓宽了无机纳米材料改性沥青结合料（INMAB）在路面工程中的应用。
Inorganic nanomaterials are widely studied to modify asphalt binder. However, the problems caused by poor compatibility and high viscosity have not been well resolved, and hence their further application is still limited. In order to break the limitation, this study proposes a new grafting method to optimize the surface characteristics of graphene oxide (GO), and finds that the upgraded GO when used as a modifier can significantly improve above mentioned problems. Specifically, coupling graft graphene fluid (CG-GF) was successfully synthesized via a two-step grafting method, and then properties of CG-GF were studied through Fourier infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), thermogravimetric analysis (TG), dispersion and fluidity tests. Thirdly, the prepared CG-GF was used to modify the pure asphalt binder (A-90), and the comprehensive performance of CG-GF modified asphalt binder (CMAB) was validated. Results show the modified binder doesn’t see a significant increase in viscosity above 135 °C and compatibility is not weakened. The significance of this paper is to propose a feasible method to modify the performance of inorganic nanomaterials, and this method widens the application of inorganic nanomaterial modified asphalt binders (INMAB) in pavement engineering.