Development of Functional Graphite Sheets

1)膨胀石墨的合成新工艺--碱金属-四氢呋喃-石墨三元层间化合物合成新工艺，具有传统工艺的优点。2）具有化学活性的石墨片--所合成的膨胀石墨中含有钾等碱金属微粒，具有特殊的活性; 3）磁性石墨片--以钴-四氢呋喃-石墨三元插层化合物为原料，合成含有微小钴颗粒的膨胀石墨。由这种膨胀石墨通过压缩形成的石墨片可以粘在磁体上，这可能有利于其作为垫圈的运输，例如。4）碳纤维的剥离和石墨片的拉伸--一些在高温下热处理的碳纤维通过钾-四氢呋喃-石墨三元插层化合物的方法被剥离。剥离行为强烈依赖于碳纤维的结构和微观织构。膨胀石墨与碳纤维复合材料的制备对石墨片的强化效果不佳，原因是膨胀石墨与碳纤维难以均匀混合。

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.