Raw Data of Magnetic Test for Variation of Microcarbonyl iron of Loading Natural Rubber Nanocomposites

The performance of magnetic rubber device is dependent on mechanical and magnetic properties of composite rubber materials. A vibrating sample magnetometer (VSM) is an instrument to detect the magnetic properties. The magnetic field versus magnetization was carried out to study the magnetic characteristics of the nanocomposite samples. VSM Lakeshore 7404 Series was used to analysis the magnetic properties of nanocomposite material. In the present study, the samples were tested under two (2) variations; i) containing the same amount of magnetic fillers, which is about 30 pphr in the composites but vary in nanocarbon loading i.e. 0%, 1%, 3% and 5% and ii) samples containing the same amount of 1 pphr nanocarbon fillers, in the composites with different loading of microcarbonyl iron (MCI). the increasing of magnetic properties of the samples is not consistent with the increasing of nanocarbon loading as A1 has a higher magnetization value than A5, which is really contrast with the previous work (Zaborski et al., 2009). This phenomenon occurred because of the fillers are well dispersed in the compound A1. Zaborski et al. (2009) found that the magnetization retentively increase with higher filler content of iron oxides. It has been found that in general, the addition of iron nanoparticles enhances the MRE mechanical and magnetic properties. In fact, the addition of iron nanoparticles as a filler in the hard matrix along with 24% of dispersant agent has proved to create the composite material that exhibits the best properties.

磁橡胶器件的性能取决于复合橡胶材料的力学与磁学性能。振动样品磁强计（vibrating sample magnetometer，VSM）是用于检测磁学性能的仪器。本研究通过测试磁场-磁化强度曲线，以探究纳米复合样品的磁学特性。实验采用VSM Lakeshore 7404系列设备对纳米复合材料的磁学性能进行分析。本研究中，样品设置了两组变量：① 复合材料中磁性填料用量固定为30pphr（parts per hundred rubber，每百份橡胶），纳米碳负载量分别为0%、1%、3%和5%；② 复合材料中纳米碳填料用量固定为1pphr，微羰基铁（microcarbonyl iron，MCI）的负载量各不相同。样品的磁学性能提升并未与纳米碳负载量的增加呈正相关，例如样品A1的磁化强度高于样品A5，这与Zaborski等人（2009）的前期研究结果相悖。该现象的成因在于填料在样品A1中分散性更佳。Zaborski等人（2009）的研究表明，磁化强度会随氧化铁填料含量的提升而持续升高。现有研究普遍认为，添加铁纳米颗粒可提升磁流变弹性体（magnetorheological elastomer，MRE）的力学与磁学性能。事实上，在硬质基体中添加铁纳米颗粒作为填料，并搭配24%的分散剂，已被证实可制备出综合性能最优的复合材料。