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摘要
使用两步法聚酰亚胺(PI)制备工艺,结合静电纺丝技术,成功制备具有多孔结构的PI绝缘纸,并通过调整纺丝工艺调控纤维纸密度。通过改变喷丝速率发现,绝缘纸的体积密度先增大后减小;随着绝缘纸密度升高,其击穿场强逐渐增强,介电常数和体积电阻率逐渐增大。在喷丝速率为0.06mL/min时,PI纤维纸的体积密度达到最大为0.43g/cm3。此时,绝缘纸的拉伸强度为227MPa,击穿场强为70kV/mm,体积电阻率为1015Ω·m,介电常数为2.5,介电损耗仅为1.4×10-4。如果使用纳米填料原位法对聚酰胺酸(PAA)进行掺杂,制备的绝缘纸击穿场强比未掺杂绝缘纸明显提升,说明该绝缘纸的性能仍然有提升拓展空间。
Abstract
PI insulating paper with porous structure was successfully prepared by two-step polyimide (PI) preparation process combined with electrospinning technology,and the density of fiber paper was regulated by adjusting the spinning process.By changing the spinning rate,it was found that the bulk density of insulating paper first increased and then decreased;With the increase of the density of insulating paper,the breakdown field strength,dielectric constant and volume resistivity gradually increased.When the spinning rate was 0.06mL/min,the bulk density of the PI fiber paper reached the maximum of 0.43g/cm3.At this time,the tensile strength of insulating paper was 227MPa,the breakdown field strength was 70 kV/mm,the volume resistivity was 1015Ω·m,the dielectric constant was 2.5,and the dielectric loss was only 1.4×10-4.If polyamide acid (PAA) was doped with nano filler in situ,the breakdown field strength of the prepared insulating paper was significantly improved compared with that of undoped insulating paper,indicating that the performance of the insulating paper still had room for improvement and expansion.
关键词
静电纺丝
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聚酰亚胺
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绝缘纸
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体积密度
Key words
electrospinning
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polyimide
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insulating paper
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bulk density
体积密度对聚酰亚胺绝缘纸性能影响规律研究[J].
化工新型材料, 2023, 51(5): 102-105 DOI:10.19817/j.cnki.issn1006-3536.2023.05.018
[1] Arcos R V,Michel B,Kaike S T,et al.Power transformers thermal modeling using an enhanced set-membership multivariable gaussian evolving fuzzy system[J].Electric Power Systems Research,2021,194:42-54.
[2] Petar S,Damir J,Josip V S,et al.Optimal scheduling of power transformers preventive maintenance with Bayesian statistical learning and influence diagrams[J].International Journal of Electrical Power and Energy Systems,2020,129:258-271.
[3] 王磊,牛铭康,李超,等.TiO2纳米变压器油击穿和电导特性的微观模型[J].高电压技术,2019,45(10):3350-3356.
[4] Paul J,Elisabeth S,Antje P,et al.[J].Carbohydrate Polymers,2021,252:489-514.
[5] 温敏敏,田慕琴,宋渊,等.干式变压器用Nomex绝缘纸老化规律及其可靠性分析[J].高电压技术,2014,40(11):3430-3437.
[6] Lu Z,Si L,Zhao Y,et al.Enhanced mechanical and electrical insulating propertiesof(poly(para-phenylene terephthamide)) PPTA-based specialty paper with nanoscale PPTA fibers[J].Journal of Materials Science Materials in Electronics,2019,30(15):14414-14423.
[7] Si L,Lu Z,Yao C,et al.Nacre-like nanocomposite film with excellent dielectric insulation properties and mechanical strength basedon montmorillonite nanosheet and aramid nanofiber[J].Journal of Materials Science,2020,55:5948-5960.
[8] Tomioka I,Nakano T,Furukawa M,et al.Polyimide precursor fibrid,polyimide paper,polyimide composite paper and polyimide composite board obtained therefrom,and process for producing the fibrid and the paper products:US629049[P].2001-09-25.
[9] 陆赵情,徐强,丁孟贤,等.芳纶浆粕影响聚酰亚胺纤维纸性能的研究[J].造纸科学与技术,2013,32(2):30-32,41.
[10] 陆赵情,徐强,王志杰.聚酰亚胺纤维纸基材料成纸性能的探究[J].造纸科学与技术,2012,31(5):40-44.
[11] 丁孟贤,谭洪艳,吕晓义,等.聚酰亚胺纤维纸的制备方法:中国,CN102839560A[P].2012-12-26.
[12] 小签原俊夫,横田力男,小泽秀生,等.炭素绒维/新规示リ亻三下Tri-A PI复合材料のRTM成形[J].复合材料,2002(27):183-184.
[13] 焦晓宁,于宾,柯鹏,等.一种静电纺丝/静电喷雾制备复合锂离子电池隔膜的方法:中国,CN103474610A[P].2013-12-25.
基金资助
黑龙江省省属高等学校基本科研业务费项目(2020-KYYWF-0340)
