竹纤维绝缘纸/环氧复合材料的制备与性能分析  

Preparation and Performance Analysis of Bamboo Insulating Paper/Epoxy Composites

作　　者：许天蕾 王青于 宋顺喜 张美云 彭宗仁[1] 刘鹏[1] XU Tianlei;WANG Qingyu;SONG Shunxi;ZHANG Meiyun;PENG Zongren;LIU Peng(State Key Laboratory of Electrical Insulated and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China;College of Bioresources Chemical and Materials Engineering,Shaanxi University of Science and Technology,Xi’an 710021,China)

机构地区：[1]西安交通大学电力设备电气绝缘国家重点实验室,西安710049 [2]陕西科技大学轻工科学与工程学院,西安710021

出　　处：《高电压技术》2023年第11期4535-4546,共12页High Voltage Engineering

基　　金：国家电网公司科技项目(SGLNDK00KJJS1900250)。

摘　　要：为解决我国绝缘木浆高度依赖进口、优质木材纤维资源短缺等问题,实现高压套管用绝缘纸的自主化生产,对竹浆纸及其环氧复合材料的电热力性能开展研究。首先对竹浆依次添加盐酸及醋酸镁进行纯化处理,研究纯化处理方式对纸张理化性能的影响;然后制备环氧/竹浆纸复合材料,测量其电学和热学性能,并与现有环氧/绝缘木浆纸复合材料进行对比。结果表明,纯化处理能降低竹浆纸中的灰分含量,增强纤维间的结合力,提高纸张的绝缘性能与机械性能,其中盐酸配合镁盐的纯化处理工艺能够进一步降低浆料挤出液的电导率,有效减少介电损耗。纯化处理能有效提高环氧/竹浆纸复合材料的玻璃化转变温度、介电性能与击穿强度,使其电学和热学性能接近甚至优于环氧/绝缘木浆纸复合材料。研究结果为落实国家“双碳”目标,推动我国电气工程基础材料自主化研发提供方法和途径。In order to solve the problems of high dependence on the import of insulating wood pulp and the shortage of high-quality wood fiber resources in China,and to realize the independent production of insulating paper for high voltage bushing,we studied the electrothermal multi-physical properties of bamboo paper and its epoxy composites.Firstly,the bamboo pulp was purified by adding hydrochloric acid and magnesium acetate in turn,and the effect of the purification treatment on the physicochemical properties of the bamboo paper was studied.Then,epoxy/bamboo paper composites were prepared,and their electrothermal properties were measured and compared with the insulating wood paper.The results show that the purification treatment can reduce the ash content of bamboo paper,enhance the bonding force between fibers,and improve the insulation properties and mechanical properties of the paper.The purification process of hydrochloric acid combined with magnesium salt can further reduce the electrical conductivity of the pulp extract and effectively reduce the dielectric loss.Purification treatment can effectively improve the glass transition temperature,dielectric properties,and breakdown strength of epoxy/bamboo paper composites,and enable their electrothermal properties close to or even better than the insulating wood paper.The results provide methods and ways to implement the carbon peaking and carbon neutrality goals and promote the independent research and development of electrical engineering basic materials in China.

关 键 词：竹浆纸 纯化处理 环氧/纸复合材料 电气性能 机械性能 

分 类 号：TM215.6[一般工业技术—材料科学与工程] TB332[电气工程—电工理论与新技术]