The effect of natural filler loading, multi-walled carbon nanotubes (MWCNTs), and moisture absorption on the dielectric constant of natural filled epoxy composites was investigated. The natural filled epoxy composites were fabricated using a natural filler, MWCNTs and epoxy resin. The natural fillers chosen were Jute, Kenaf, and Napier. Composites were manufactured using a cold-press method, with the loading of the natural fillers being 7, 14, and 21 vol%, respectively, while the MWCNTs were 0 and 2 vol%. Dielectric tests were conducted using an Agilent/Keysight E8363B PNA Network Analyser in dry and wet conditions. The moisture absorption curves indicate that higher vol% natural filler loading increases the moisture content of the composites. The results show that the Napier filled epoxy composite had the lowest dielectric constant between 12.40 GHz and 16.66 GHz. The presence of 2 vol% MWCNTs successfully decreased the dielectric constant for 7 vol% Jute filled epoxy composites.

研究了天然填料填充量，多壁碳纳米管（MWCNT）和吸湿率对天然填充环氧复合材料介电常数的影响。使用天然填料，MWCNT和环氧树脂制造天然填充的环氧复合材料。选择的天然填料是黄麻，洋麻和纳皮尔。使用冷压法制造复合材料，天然填料的填充量分别为7、14和21％（体积），而MWCNTs为0％和2％（体积）。使用Agilent / Keysight E8363B PNA网络分析仪在干燥和潮湿条件下进行介电测试。吸湿曲线表明较高的vol％天然填料含量增加了复合材料的水分含量。结果表明，纳皮尔填充的环氧复合材料的介电常数最低，介于12之间。40 GHz和16.66 GHz。2体积％MWCNT的存在成功降低了7体积％黄麻填充的环氧复合材料的介电常数。