高性能液晶环氧树脂纤维薄膜  

High-performance Liquid Crystal Epoxy Resin Fiber Film

作　　者：龙云峰 黄正勇[1] 胡清华 杨森元 尚恺 LONG Yunfeng;HUANG Zhengyong;HU Qinghua;YANG Senyuan;SHANG Kai(State Key Laboratory of Power Transmission Equipment and System Security and New Technology,Chongqing University,Chongqing 400044,China;State Key Laboratory of Electrical Insulation and Power Equipment,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044 [2]西安交通大学电力设备电气绝缘国家重点实验室,陕西西安710049

出　　处：《绝缘材料》2022年第6期22-27,共6页Insulating Materials

基　　金：国家自然科学基金资助项目(51707016)。

摘　　要：将液晶环氧单体固化后得到液晶环氧树脂预聚物,利用静电纺丝技术得到了不同纤维直径的液晶环氧树脂纤维薄膜。利用偏光显微镜和可移动热台对样品进行双折射性观察,并系统评价了不同纤维直径的液晶环氧树脂纤维薄膜的力学性能、介电性能以及绝缘性能。结果表明:利用静电纺丝方法制备的液晶环氧树脂可以形成并保持有序的液晶相。直径越细的纤维取向排列程度越高,当纤维直径为280 nm时,液晶环氧树脂纤维薄膜的拉伸强度最大,为7.53 MPa。液晶环氧树脂在10-1~106 Hz的测试频率下,介电常数最高为2.34,介质损耗因数在工频下仅为0.002。此外,液晶环氧树脂纤维薄膜具有较大的电阻率,当纤维直径为280 nm时,液晶环氧树脂纤维薄膜的体积电阻率可以达到5.49×1015Ω·cm。The liquid crystal epoxy monomer was cured to obtain liquid crystal epoxy resin prepolymer,and liquid crystal epoxy resin fiber films with different fiber diameters were obtained by electrospinning technique.The birefringence of the samples was observed by polarizing microscopy and removable hot stage,and the mechanical properties,dielectric properties,and insulation properties of the liquid crystal epoxy resin fiber films with different fiber diameters were systematically evaluated.The results show that the liquid crystal epoxy resin prepared by electrospinning method can form and maintain an ordered liquid crystal phase.The finer the fiber diameter,the higher the degree of orientation arrangement,and when the fiber diameter is 280 nm,the tensile strength(7.53 MPa)of the liquid crystal epoxy resin fiber film is the largest.Under the test frequency ranging from 10-1 Hz to 106 Hz,the dielectric constant of the liquid crystal epoxy resin reaches to the highest value of 2.34,and the dissipation factor is only 0.002 at industrial frequency.In addition,the liquid crystal epoxy resin fiber film has high resistivity,and when the fiber diameter is 280 nm,the volume resistivity of the liquid crystal epoxy resin fiber film can reach to 5.49×10^(15)Ω·cm.

关 键 词：环氧树脂 静电纺丝 纤维薄膜 介电性能 

分 类 号：TM215[一般工业技术—材料科学与工程]