Research about fictionalization of composites including a small amount of vapor grown carbon fiber by magnetic or electric field

本课题“利用磁场或电场对含有少量气相生长碳纤维的复合材料进行虚拟化的研究”的主要研究成果如下：1.气相生长碳纤维（VGCF）的基本取向性1.1分散方法的确立和长度分析由于所得到的VGCF具有块状结构，但在不使VGCF断裂的情况下，建立了简单的分散方法，从而使VGCF的长度及其分布的测定成为可能。定量分析了熔体混合过程中长度的变化。对复合材料的导电性能进行了评价。研究了VGCF的长度、电导率、熔体混合之间的关系。1.2磁场下的基本取向性通过对单个VGCF（分散状态良好，浓度很低）在聚合物基体中的转速分析，确定了其磁各向异性。1.3电场作用下的基本取向性质通过对单个VGCF（分散状态良好，浓度很低）在聚合物基体中的转速分析，确定了其磁各向异性性质。2.磁或电加工装置的研制了Match型磁或电加工装置，并成功地制备了在磁场或电场作用下取向的含VGCF的聚合物薄膜。薄膜具有透明导电性（厚度方向约为10 ohm-cm，仅含0.2wt%的VGCF）。

Major research results of this projects entitled with "Research about fictionalization of composites including a small amount of vapor grown carbon fiber by magnetic or electric field" are the following points :1.Fundamental orientation property of vapor grown carbon fiber(VGCF)1.1 Establishment of dispersion method and length analysisVGCFs as received has lump structure but a simple dispersion method was established without breaking VGCFs, resulting in the possibility of measurement of VGCF length and its distribution. The length change during melt mixing was quantitatively analyzed. The electric conductivity of composites was evaluated. The relationship among length of VGCFs, electric conductivity, melt mixing were investigated1.2 Fundamental orientation property under magnetic fieldThrough rotational speed analysis of a single VGCF (well dispersed state, very low concentration) in polymeric matrix, magnetic anisotropic property was determined. In addition, structural development of VGCF under magnetic field was investigated1.3 Fundamental orientation property under electric fieldThrough rotational speed analysis of a single VGCF (well dispersed state, very low concentration) in polymeric matrix, magnetic anisotropic property was determined. In addition, structural development of VGCF under electric field was investigated2.Development of magnetic or electric processing apparatusMatch type magnetic or electric processing apparatus was developed and it was demonstrated to produce polymeric film including VGCFs oriented under magnetic or electric field. The films show transparent electro conductive (thickness direction about 10ohm-cm, only with 0.2wt% of VGCFs) property.