Exfoliated graphite (EG) is promising oil sorbent as well as an intermediate product for the preparation of flexible graphite films (FGFs). It has been a critical challenge to energy conservation and pollution abatement for the traditional EG production technique. Here, we propose a simple and effective preparation method to acquire EG in which flake graphite is intercalated and exfoliated at room temperature, not involving any pollutant emission. The influence factors in the preparation process were explored, such as the amount of H₂SO₄ and H₂O₂, the temperature for the preparation of room temperature exfoliated graphite (RTEG). In contrast to the EG by high temperature exfoliation (HTEG), RTEG exhibits a homogeneous structure and a significantly increased volume and surface area. Moreover, EG blocks with high oil sorption capacity and excellent reuse performance can be obtained by RTEG method. Especially, FGFs fabricated by RTEG has high flexibility, thermal conductivity and electrical conductivity. It suggests that this environment-friendly technology is suitable for large-scale industrial implementation of graphite-based oil sorbents and flexible materials.

片状石墨（EG）是有前途的吸油剂，也是制备柔性石墨薄膜（FGFs）的中间产品。对于传统的EG生产技术，这一直是节能和减少污染的关键挑战。在此，我们提出了一种简单有效的制备方法，该方法是在室温下将片状石墨插入和剥落而获得的EG，而这种方法不涉及任何污染物排放。探索了制备过程中的影响因素，如H ₂ SO ₄和H ₂ O ₂的含量，用于制备室温片状石墨（RTEG）的温度。与通过高温剥落法（EGEG）形成的EG相反，RTEG表现出均匀的结构，体积和表面积显着增加。而且，通过RTEG方法可以获得具有高吸油量和优异的再利用性能的EG嵌段。特别地，由RTEG制造的FGF具有高的柔韧性，导热性和导电性。这表明这种环境友好的技术适合于大规模工业实施石墨基吸油剂和柔性材料。