高级检索

    聚合诱导相分离制备多孔环氧树脂固化物膜

    Preparation of Cured Porous Epoxy Resin Films via Polymerization Induced Phase Separation

    • 摘要: 将高反应性脂肪族胺类593固化剂、易挥发溶剂丙二醇甲醚与环氧树脂单体双酚A-二缩水甘油醚组合成新型体系(Ink),该体系可在室温下快速固化、相分离并去除溶剂。基于聚合诱导相分离技术,25 ℃下的Ink经预固化和薄膜固化及最终的高温固化,制得盲孔型环氧树脂固化物膜。使用衰减全反射傅里叶变换红外光谱、相差显微镜及光学显微镜等技术探究固化反应、相分离过程及形貌演变。研究表明:当薄膜固化时间为120 min时、Ink预固化60、120 min时,所得盲孔平均孔径分别为0.50、0.87 μm,延长预固化时间可增大孔径与孔深。此外,以去离子水为反溶剂促进相分离,得到通孔型环氧树脂固化物膜,该流程显著简化了多孔环氧树脂膜的制备。

       

      Abstract: A high-reactivity aliphatic amine curing agent (type 593), a volatile solvent (propylene glycol methyl ether), and an epoxy monomer (bisphenol A diglycidyl ether) were combined into a novel system (denoted as Ink), which enables rapid curing, phase separation, and solvent removal at room temperature. Using the polymerization-induced phase separation technique, blind-pore type epoxy cured films were fabricated through Ink dwell and film dwell at 25 ℃, followed by a final high-temperature curing step. Attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), phase contrast microscopy, and optical microscopy were employed to investigate the curing reaction, phase separation process, and morphological evolution. Results showed that when the film dwell time was fixed at 120 min, the average pore diameters of the blind-hole type epoxy films obtained with Ink dwell times of 60 min and 120 min were 0.50 μm  and 0.87 μm, respectively, indicating that extending the Ink dwell time increased both pore diameter and depth. Moreover, a through-pore type epoxy cured film was obtained by using deionized water as an antisolvent to promote phase separation. This process significantly simplifies the preparation of porous epoxy cured films.

       

    /

    返回文章
    返回