High-performance quartz fiber/polysilazane and epoxy-modified cyanate ester microwave-transparent composites,Advanced Composites and Hybrid Materials

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High-performance quartz fiber/polysilazane and epoxy-modified cyanate ester microwave-transparent composites
Advanced Composites and Hybrid Materials ( IF 23.2 ) Pub Date : 2022-04-01 , DOI: 10.1007/s42114-022-00456-9
Jianwei Li ₁ , Wenzhong Zhao ₁ , Peilun Xu ₁ , Yixiu Wang ₂ , Tingyi Wang ₂ , Jie Kong ₂

Affiliation

In this contribution, to synchronously optimize microwave transmission and mechanical properties of polymer composites, the polysilazane (PSN) and epoxy resin (EP) were used to modify cyanate ester (CE) resin. The quartz fibers with high strength, low dielectric constant, and dielectric loss tangent were used as reinforcement to prepare high-performance quartz fiber/PSN/CE-EP composites and to achieve effective improvement of microwave-transparent and mechanical properties. The results showed that quartz fiber/PSN/CE-EP composites with 4 wt% PSN displayed optimized comprehensive performance. The corresponding flexural strength was 612.6 MPa and flexural modulus was 27.25 GPa. In the X-band with frequency of 8.2 ~ 12.4 GHz, the dielectric constant was between 3.08 and 3.31 and the lowest microwave transmissivity was 86.68%. Compared to traditional microwave-transparent composites, the dielectric loss was greatly reduced and the microwave transmissivity was synchronously improved. This work provided an important concept for the synchronous regulation and enhancement of microwave transmissivity and mechanical properties of polymeric composites, as well as the preparation of high-performance microwave transmission composites with wide application in aircraft radar and antenna radome.

Graphical abstract

The quartz fiber–reinforced polysilazane and epoxy-modified cyanate ester composites possess synchronous microwave-transparent and mechanical properties

中文翻译：

高性能石英纤维/聚硅氮烷和环氧改性氰酸酯微波透明复合材料

在这项贡献中，为了同步优化聚合物复合材料的微波传输和机械性能，使用聚硅氮烷 (PSN) 和环氧树脂 (EP) 对氰酸酯 (CE) 树脂进行改性。以高强度、低介电常数和介电损耗角正切的石英纤维为增强材料，制备高性能石英纤维/PSN/CE-EP复合材料，有效提高了微波透光性和力学性能。结果表明，4 wt% PSN的石英纤维/PSN/CE-EP复合材料表现出优化的综合性能。相应的抗弯强度为 612.6 MPa，抗弯模量为 27.25 GPa。在频率为8.2～12.4 GHz的X波段，介电常数在3.08～3.31之间，最低微波透过率为86.68%。与传统的微波透明复合材料相比，介电损耗大大降低，微波透过率同步提高。该工作为同步调控和提高高分子复合材料的微波透过率和力学性能，以及制备在飞机雷达和天线罩中广泛应用的高性能微波传输复合材料提供了重要的思路。