In the present study, the effect of Ni, Co, and Fe carbon‐based magnetic fillers (Ni‐C, Co‐C, and Fe‐C) was investigated on the magnetic, mechanical, thermal, and morphological properties of polyethylene nanocomposites. The in situ polymerization technique was used to prepare nanocomposites of polyethylene from the ethylene monomer introducing small amounts of filler ranging from 1 to 2 wt.%. The metal‐carbonized fillers were obtained by pyrolysis of wood sawdust activated by Ni, Co, or Fe salts. X‐ray diffraction showed that the fillers were of nanometric size. Thermogravimetric analysis was executed to investigate the thermal strength of the materials as well as to calculate the metal content in the carbon‐based fillers. The onset degradation temperature showed an enhancement of 17°C, whereas the maximum degradation temperatures increased 4°C with the introduction of the filler. Differential scanning calorimetry indicated an improvement of 3°C in crystallization temperature, whereas the melting temperature remained unchanged compared to neat polyethylene. The filler was shown to increase the modulus of elasticity of the nanocomposites. The addition of 1.0 wt.% of the metal‐carbonized material in the diamagnetic polymer matrix resulted in a thermoplastic nanocomposite with ferromagnetic behavior. POLYM. ENG. SCI., 60:988–995, 2020. © 2020 Society of Plastics Engineers

中文翻译：

---

含Ni，Co和Fe碳基磁性填料的聚乙烯纳米复合材料

在本研究中，研究了Ni，Co和Fe碳基磁性填料（Ni-C，Co-C和Fe-C）对聚乙烯纳米复合材料的磁性，机械，热学和形貌特性的影响。在原位聚合技术用于由乙烯单体制备聚乙烯纳米复合材料，引入少量的1-2％（重量）的填料。金属碳化的填料是通过将木锯屑经Ni，Co或Fe盐活化而热解而获得的。X射线衍射表明填料具有纳米尺寸。进行了热重分析，以研究材料的热强度以及计算碳基填料中的金属含量。起始降解温度显示出增加了17°C，而随着填料的加入，最大降解温度增加了4°C。差示扫描量热法表明结晶温度提高了3℃，而熔融温度与纯聚乙烯相比保持不变。填料显示出增加了纳米复合材料的弹性模量。在抗磁性聚合物基体中添加1.0 wt。％的金属碳化材料会产生具有铁磁行为的热塑性纳米复合材料。POLYM。ENG。SCI。，60：988–995，2020.©2020塑料工程师协会