The aim of this work is to manage the waste product based on polyethylene (PE) films by recycling and reusing it as antistatic material for electronic packaging and electromagnetic interference (EMI) shielding material for protecting electronic equipment from interference of EM radiation. To achieve this, a conductive carbon black has been mixed with the PE waste at different weight percent values by ultrasonication via a solution mixing process. Mixing time for sonication was determined by ultraviolet-visible (UV-VIS) spectra. A differential scanning calorimetry (DSC) study showed that the low-density polyethylene (LDPE) and linear low-density polyethylene (LLDPE) are immiscible in their blend composition. The tensile properties of PE have reduced substantially after reprocessing. However, the addition of carbon black has improved its strength up to a certain loading. The electrical percolation threshold values, calculated using the classical power law and sigmoidal Boltzmann model, were obtained at 3.5 and 2.8 wt% loading of carbon black, respectively. The conductivity result revealed that 1-2 wt% carbon-loaded composites can be used as antistatic material. The composites, having carbon loading above 4 wt%, can be effective materials for EMI shielding application. The 10 wt% carbon-loaded composite exhibits EMI SE value 33 dB which means there is approximately 99.93% protection of EM radiation at the sample thickness of 1.0 mm. Moreover, FTIR analysis, thermal stability, AC conductivity, dielectric properties, permeability, and current-voltage characteristics are also discussed in detail. There is a substantial increment in thermal stability, and dielectric properties are observed with the addition carbon black loading within the polymer matrix.

中文翻译：

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聚乙烯废料的回收和再利用，作为抗静电和电磁干扰屏蔽材料

这项工作的目的是管理基于聚乙烯（PE）薄膜的废品，方法是将其作为电子包装的抗静电材料和电磁干扰（EMI）屏蔽材料进行回收和再利用，以保护电子设备免受EM辐射的干扰。为此，已通过溶液混合工艺通过超声处理将导电炭黑与PE废料以不同的重量百分比混合。通过紫外-可见（UV-VIS）光谱确定超声处理的混合时间。差示扫描量热法（DSC）研究表明，低密度聚乙烯（LDPE）和线性低密度聚乙烯（LLDPE）在它们的共混物组成中是不溶混的。再加工后，PE的拉伸性能已大大降低。然而，炭黑的添加提高了其强度，直至达到一定的负载量。使用经典幂律和S型Boltzmann模型计算的电渗滤阈值分别在炭黑负载量为3.5和2.8 wt％时获得。电导率结果表明，可将1-2 wt％的含碳复合材料用作抗静电材料。具有高于4wt％的碳负载的复合材料可以是用于EMI屏蔽应用的有效材料。含碳量为10 wt％的复合材料的EMI SE值为33 dB，这意味着在1.0 mm的样品厚度下，对EM辐射的防护约为99.93％。此外，还将详细讨论FTIR分析，热稳定性，AC电导率，介电特性，磁导率和电流-电压特性。