二氧化锰混合体系在聚硫密封剂中的应用
Application of manganese dioxide mixed system in polysulfide sealant
张立国 1陈京帅 2吴松华3
作者信息
- 1. 航空工业第一飞机设计研究院,陕西 西安 710089
- 2. 安徽大学 化学化工学院,安徽 合肥 230601
- 3. 北京航空材料研究院股份有限公司,北京 100094
- 折叠
摘要
通过水热合成法制备出3 种不同晶型的二氧化锰,通过X射线衍射(XRD)和扫描电镜(SEM),最终分别确定δ-MnO2,γ-MnO2 和α-MnO2 这三种晶型.利用非介入式材料均质机进行物理混合制备了一系列二氧化锰混合体系.探究不同晶型二氧化锰、不同二氧化锰混合体系对聚硫密封剂的硫化性能和力学性能的影响.研究表明,用δ-MnO2 作为硫化剂硫化后的聚硫密封剂具有更好的力学性能.在不同混合体系中,δ-MnO2 和Mn2 O3 定量存在有助于聚硫密封剂的硫化,有利于提高聚硫密封剂的力学性能.
Abstract
Three different crystalline forms of manganese dioxide were prepared by hydrothermal synthe-sis,and the three crystalline forms of δ-MnO2,γ-MnO2 and α-MnO2 were finally determined by X-ray dif-fraction(XRD)and scanning electron microscopy(SEM).A series of manganese dioxide hybrid systems were prepared by physical mixing using a non-invasive material homogenizer.The effects of different crys-talline manganese dioxide and different manganese dioxide blending systems on the vulcanization proper-ties and mechanical properties of polysulfide sealants were investigated.The study showed that the poly-sulfide sealants vulcanized with δ-MnO2 as vulcanizing agent had better mechanical properties.The quan-titative presence of δ-MnO2 and trivalent manganese in different mixing systems contributes to the vulcani-zation of polysulfide sealants and is beneficial to improve the mechanical properties of polysulfide seal-ants.
关键词
二氧化锰/聚硫密封剂/混合体系/晶型/硫化Key words
manganese dioxide/polysulfide sealant/mixed system/crystal form/vulcanization引用本文复制引用
基金项目
安徽省自然科学基金(2108085QB48)
安徽省高等学校自然科学研究重点项目(KJ2021A0029)
安徽省高等学校自然科学研究重点项目(KJ2021A0033)
出版年
2024
NETL
NSTL
万方数据