Yu Guang, Cheng Yujia, Duan Zhuohua
Mechanical and Electrical Engineering Institute, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528400, China.
Molecules. 2022 Jun 8;27(12):3674. doi: 10.3390/molecules27123674.
Polyethylene, a thermoplastic resin made by ethylene polymerization, is widely used in electrical insulation. In this study, low-density polyethylene (LDPE) is used as a matrix with micro- and nano-ZnO particles as a filler to produce different proportions of micro- and nano-ZnO composites by melt blending. These samples are characterized by Polarized Light Microscopy (PLM) and FTIR tests, with their conductance measured under different field strengths. The current density vs. electric field strength (J-E) curve of micro- and nano-ZnO composites under different field strengths are measured and analyzed. The J-E curves of different composites at different temperatures are measured to explore conductance with temperature. The results of these tests showed that nano-ZnO composites successfully suppressed conductivity at elevated temperatures and electric field strengths, while micro-ZnO composites increased the conductivity relative to pure LDPE.
聚乙烯是一种由乙烯聚合而成的热塑性树脂，广泛应用于电气绝缘领域。在本研究中，低密度聚乙烯（LDPE）被用作基体，微米和纳米氧化锌颗粒作为填料，通过熔融共混制备不同比例的微米和纳米氧化锌复合材料。这些样品通过偏光显微镜（PLM）和傅里叶变换红外光谱（FTIR）测试进行表征，并在不同场强下测量其电导率。测量并分析了不同场强下微米和纳米氧化锌复合材料的电流密度与电场强度（J-E）曲线。测量了不同复合材料在不同温度下的J-E曲线，以探究电导率与温度的关系。这些测试结果表明，纳米氧化锌复合材料在高温和高场强下成功抑制了电导率，而微米氧化锌复合材料相对于纯LDPE提高了电导率。
