Development of Functional Graphite Sheets

1)建立了制备剥离石墨的新工艺--碱金属-四氢呋喃-石墨三元插层化合物新工艺，该新工艺具有传统方法的优点。2)具有化学活性的剥离石墨片--上面合成的剥离石墨片含有微小的碱金属，如钾，具有特征活性；强吸附稀水溶液中的氯离子，并作为二次电池的正极材料，以硫酸为电解液。3)磁性石墨片--从钴-四氢呋喃-石墨三元插层化合物出发，合成了含有微小钴粒子的剥离石墨。这种剥离的石墨通过压缩形成的石墨片可以粘在磁体上，这可能有利于它作为垫片的运输。4)碳纤维的剥离和石墨片的强化--一些高温处理的碳纤维通过钾-四氢呋喃-石墨三元插层化合物被剥离。剥离行为强烈地依赖于碳纤维的结构和微观织构。由于石墨片与碳纤维难以均匀混合，采用剥离石墨与碳纤维复合的方法对石墨片的增强效果并不理想。

1) New process for the synthesis of exfoliated graphite -- New process through alkali metal-tetrahydrofuran-graphite ternary intercalation compounds was established, which had advantages from the conventional one.2) Graphite sheets with chemical activity -- The exfoliated graphite synthesized above contained minute particles of alkali metal, for example potassium, and had characteristic activities; strongly abosorbed chlorine ions from dilute aqueous solutions and acted as cathode materials for secondary battery with the electrolyte of sulfuric acid.3) Graphite sheets with magnetism -- By starting from cobalt-tetrahydrofuran-graphite ternary intercalation compounds, the exfoliated graphite containing minute cobalt particles was synthesized. The graphite sheets formed from this exfoliated graphite by compression could stick on a magnet, which might be advantageous for its transportation as a gasket, for instance.4) Exfoliation of carbon fibers and stregthening of graphite sheets -- Some carbon fibers heat-treated at high temperatures were exfoliated by the process through potassium-tetrahydrofuran-graphite ternary intercalation compounds. The behaviour of exfoliation depended strongly on the structure and microtexture of the carbon fibers. The strengthening of graphite sheets by making composites of exfoliated graphite with carbon fibers was not succeeded because of the difficulty in homogeneous mixing with each other.