Abstract

With the rapid development and utilization of energy by human beings, the preparation of high-efficiency energy storage materials has become a current hot spot. This article mainly studies the mechanical properties of high temperature resistant energy storage dielectric materials and radiation scintillation detection composite materials in bridge construction. In this paper, the dispersion conditions of PBI on carbon nanomaterials were optimized, and PBI derivatives with different chemical structures were synthesized to enhance the interface force between them and carbon nanomaterials. By means of physical blending and chemical reaction grafting, the non-covalent modification or covalent modification of the surface of CNTs and graphene by the polymer was realized. In this paper, FTIR can be used to characterize the molecular structure and segment conformation (crystal phase) of PVDF-based polymers. The attenuated total reflection (ATR) mode of the E55 + FRA106 instrument was used to directly test the polymer film. In this paper, MCNP is used to simulate the interaction between Y-rays and crystal, and the structure of the detector probe is designed, including the selection of crystal material, the design of crystal size, and the requirements of structural packaging. A self-made plastic light cone is used for the coupling between the scintillator and the transmission fiber. With the increase of TPU content, the breakdown strength of the composite film showed a trend of first increasing and then decreasing. TPUs with three hardnesses all showed the highest breakdown field strength at a content of 3 vol%. The results show that changing the direct connection between the scintillator and the PMT to the light guide connection can effectively improve the light collection efficiency of the detection system. Under the simulation conditions in this article, the increase is about 30%, which is considerable and has a certain energy resolution capability.

摘要

随着人类对能源的快速开发和利用，高效储能材料的制备成为当前的热点。本文主要研究耐高温储能介电材料和辐射闪烁探测复合材料在桥梁施工中的力学性能。本文优化了PBI在碳纳米材料上的分散条件，合成了不同化学结构的PBI衍生物，以增强它们与碳纳米材料的界面力。通过物理共混和化学反应接枝，实现了聚合物对碳纳米管和石墨烯表面的非共价修饰或共价修饰。在本文中，FTIR 可用于表征 PVDF 基聚合物的分子结构和链段构象（晶相）。采用E55+FRA106仪器的衰减全反射（ATR）模式直接测试聚合物薄膜。本文采用MCNP模拟Y射线与晶体的相互作用，设计了探测器探头的结构，包括晶体材料的选择、晶体尺寸的设计以及结构封装的要求。闪烁体与传输光纤之间的耦合采用自制塑料光锥。随着TPU含量的增加，复合薄膜的击穿强度呈现先增加后下降的趋势。三种硬度的 TPU 在含量为 3 vol% 时均表现出最高的击穿场强。结果表明，将闪烁体与PMT直接连接改为光导连接，可以有效提高检测系统的光采集效率。在本文的模拟条件下，提升幅度在30%左右，相当可观，具有一定的能量分辨能力。