Buncianu Dorel, Lungulescu Eduard-Marius, Caramitu Alina, Marinescu Virgil, Marsavina Liviu, Lovasz Erwin-Christian
Faculty of Mechanics, University Politehnica of Timisoara, 2 Piata Victoriei, 300006 Timisoara, Romania.
National Institute for Research and Development in Electrical Engineering ICPE-CA, 313 Splaiul Unirii, 030138 Bucharest, Romania.
Polymers (Basel). 2024 Nov 29;16(23):3376. doi: 10.3390/polym16233376.
This study investigates the synthesis and characterization of acrylic resin/kaolin composites for dielectric applications. Acrylic resin, while widely used for its mechanical strength and ease of processing, exhibits limited dielectric properties, which restrict its use in high-performance electrical insulation. To address this, varying concentrations (0-70%) of raw kaolin, containing 71% kaolinite, were incorporated into an acrylic resin matrix to enhance its dielectric strength and thermal stability. Characterization techniques such as Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and dielectric spectroscopy were used to analyze the molecular structure, morphology, thermal behavior, and dielectric properties of the resulting composites. The study found that with up to 30% kaolin, the composites demonstrated good dielectric performance and thermal resistance, with good particle dispersion and minimal agglomeration. However, beyond 30% filler content, the dielectric and mechanical properties began to decline drastically. The results suggest that these composites could be potentially used for moderate dielectric applications such as insulators and capacitors.
本研究探讨用于介电应用的丙烯酸树脂/高岭土复合材料的合成与表征。丙烯酸树脂因其机械强度高和易于加工而被广泛使用，但其介电性能有限，这限制了它在高性能电绝缘领域的应用。为了解决这一问题，将不同浓度（0 - 70%）的含71%高岭石的天然高岭土加入到丙烯酸树脂基体中，以提高其介电强度和热稳定性。采用傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）、差示扫描量热法（DSC）和介电谱等表征技术来分析所得复合材料的分子结构、形态、热行为和介电性能。研究发现，当高岭土含量高达30%时，复合材料表现出良好的介电性能和耐热性，颗粒分散良好且团聚最少。然而，当填料含量超过30%时，介电性能和机械性能开始急剧下降。结果表明，这些复合材料有可能用于诸如绝缘体和电容器等中等介电应用。
