芳纶树脂液浸渍协同冷压光制备高强度间位芳纶纸的研究

Study on Preparing High Strength Meta-aramid Paper by Aramid Resin Solution Impregnation Combined with Cold Pressing

关键词:  芳纶树脂液浸渍  冷压光  间位芳纶纸  致密结构

Key Words:aramid resin solution impregnation  cold pressing  meta-aramid paper  dense structure

摘要:本研究提出了一种采用同质同源的芳纶树脂液浸渍协同冷压光制备间位芳纶纸的新工艺，芳纶树脂液中的强极性分子使间位芳纶纤维发生部分润胀和溶解。同时，形成的再生芳纶聚合物可以填充孔隙，且在压力作用下，纤维接触面积显著增加，产生更多氢键结合，纸张结构致密性和物理性能得到进一步提升。结合响应面法，以干燥时间、干燥温度和冷压光压力为自变量，以拉伸强度和击穿强度为响应值，对工艺参数进行优化。结果表明，干燥时间2.1 min、干燥温度79.8 ℃、冷压光压力17.27 MPa的最优条件下制备的间位芳纶纸，其拉伸强度、杨氏模量和击穿强度分别为36.93 MPa、887.13 MPa和16.42 kV/mm，与热压工艺制得的间位芳纶纸相比，分别提高了119%、127%和4%。

Abstract:In this study， a new process for preparing meta-aramid paper was proposed using homogeneous and homologous aramid resin solution impregnation combined with cold pressing. The strong polar molecules in the aramid resin solution caused partially swelling and dissolving meta-aramid fibers， while the resulting regenerated aramid polymers could fill the pores. At the same time， the contact area of the fibres under pressure was significantly increased， resulted in more hydrogen bonding.Thus， the structural denseness and physical properties of the paper had been further improved. Combined with response surface method， the process parameters were optimized with drying time， drying temperature， and cold pressing pressure as independent variables， and tensile strength and breakdown strength as response values. The results showed that the tensile strength， Young’s modulus， and breakdown strength of the meta-aramid paper prepared under the optimum conditions （drying time of 2.1 min， drying temperature of 79.8 ℃， and cold pressing pressure of 17.27 MPa） were 36.93 MPa， 887.13 MPa， and 16.42 kV/mm， respectively. Compared with the meta-aramid paper prepared by hot pressing process， they increased by 119%， 127%， and 4%， respectively.