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石墨烯的宏量制备及其后续处理工艺对全面实现这一有趣二维纳米材料的潜在应用起着至关重要的作用.在此,我们采用一种烷基枝化的Percec型枝化分子(3,4,5-三十八烷基苯基醚-1-甲醛,1)作为稳定剂,利用液相剥离石墨粉的方法,制备了具有低缺陷、热响应性能的智能石墨烯分散液.通过简单地改变温度,便能实现处于分散状态的石墨烯与稳定剂1的分离和回收利用.除了上述非共价缠绕,稳定剂1也能够通过[3+2]环加成反应共价修饰于石墨烯表面.修饰后的石墨烯在多种有机溶剂中表现出比未修饰石墨烯更好的分散性,从而为进一步将其引入聚合物体系创造了条件.本文所示的方法提供了一种制备智能石墨烯分散液以满足多种应用的新思路.
The macroscopic preparation of graphene and its subsequent processing play a crucial role in fully realizing the potential application of this interesting two-dimensional nanomaterial. Here, we use an alkyl-branched Percec-type branched molecule 3,4,5-octadecylphenyl ether-1-carbaldehyde. 1) As a stabilizer, a smart graphene dispersion with low defect and thermal response was prepared by liquid phase stripping graphite powder. By simply changing the temperature, the dispersion and recycling of the graphene in the dispersed state can be achieved with the stabilizer 1. In addition to the non-covalent entanglement described above, the stabilizer 1 can also be covalently modified by the [3 + 2] cycloaddition reaction On the graphene surface, the modified graphene exhibits better dispersibility than the unmodified graphene in a variety of organic solvents, thus creating the conditions for its further incorporation into the polymer system.The method presented herein provides a Preparation of smart graphene dispersion to meet a variety of applications of new ideas.