基于间位芳纶纸(MAP)和聚甲基丙烯酸甲酯(PMMA),采用真空浸渍法构筑了具有三明治结构的全有机PMMA-MAP-PMMA(P-M-P)复合纸。P-M-P复合纸表面粗糙度的降低以及内部孔隙率的减少显著改善了其力学性能和击穿强度。当PMMA溶液浓度为15%时,P-M-P复合纸击穿强度达68.8MV/m,相较于纯MAP提升了73.7%;此外,通过密度泛函理论(DFT)计算发现,PMMA的禁带宽度高达7.21eV,有助于进一步改善P-M-P复合纸的绝缘性能。因此,在MAP表面形成高绝缘层有助于改善其绝缘性能和击穿强度,有望为开发具有更高击穿强度的MAP提供新方法和新思路。
The vacuum impregnation method was employed to fabricate a full-organic PMMA-MAP-PMMA (P-M-P) composite paper with a sandwich structure based on meta-aramid paper (MAP) and polymethyl methacrylate (PMMA).The reduction in surface roughness of MAP and the internal porosity significantly improved the mechanical properties and breakdown strength of the P-M-P composite paper.When the PMMA solution concentration was 15wt%,the breakdown strength of the P-M-P composite paper reached 68.8MV/m,which was 73.7% higher than that of pure MAP.Moreover,density functional theory (DFT) calculations revealed that the bandgap of PMMA was as high as 7.21eV,which contributed to the further enhancement of the insulating properties of the P-M-P composite paper.These research results indicated that the formation of a high-insulation layer on the surface of MAP helped to improve its insulating performance and breakdown strength,offering new methods and insights for the development of MAP with higher breakdown strength.
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基金资助
国家重点研发项目(2021YFB3700101);河南工程学院博士培育基金项目(D2021009)
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