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纤维素纳米纤丝对电容器纸性能的影响
Effect of Cellulose Nanofibrils on the Performance of Capacitor Tissue Paper
收稿日期:2019-05-31  
DOI:10.11980/j.issn.0254-508X.2019.10.003
关键词:  电容器纸  纤维素纳米纤丝  相对结合面积  强度性能  电气性能
Key Words:capacitor tissue paper  cellulose nanofibrils  relative bonding area  strength properties  electrical properties
基金项目:国家重点研发计划资助项目 2017YFB0308200国家重点研发计划资助项目(2017YFB0308200)。
作者单位邮编
贾旺强 天津科技大学天津市制浆造纸重点实验室天津300457 300457
郑进智 天津科技大学天津市制浆造纸重点实验室天津300457 300457
池凯 天津科技大学天津市制浆造纸重点实验室天津300457 300457
石爽 天津科技大学天津市制浆造纸重点实验室天津300457 300457
刘泽华 天津科技大学天津市制浆造纸重点实验室天津300457 300457
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摘要:以未漂硫酸盐针叶木浆为电容器纸主要原料,研究了添加纤维素纳米纤丝(CNF)对电容器纸强度等性能的影响,并在Page方程的基础上进一步研究了添加CNF和提高打浆度对相对结合面积(RBA)的影响,最后研究了CNF对电容器纸电气性能的影响。结果表明,CNF对电容器纸的紧度、透气度、抗张指数均有明显影响,但随着打浆度提高,CNF对紧度提高、透气度降低、抗张指数增大的贡献逐渐减小;在Page方程的基础上研究得出,提高打浆度和添加少量CNF可以增大纸张的RBA。综合考虑电容器纸高紧度、低透气度的要求,以及打浆节能和CNF成本因素,适宜的打浆度为80°SR,CNF的添加量为2%(相对于绝干浆质量),在此条件下纸张抗张指数达76.0 N•m/g,紧度为0.80 g/cm3,透气度为0.233 μm/(Pa•s);工频下电容器纸的介电常数为1.21,介质损耗为0.037,击穿场强为15.13 kV/mm。
Abstract:The effect of cellulose nanofibrils (CNF) on the properties of capacitor tissue paper was studied by using unbleached sulphate softwood pulp as raw material. Based on the Page equation, the effect of adding CNF and increasing beating degree on the relative bonding area (RBA) was further investigated. Finally, the influence of CNF on the electrical properties of capacitor tissue paper was researched in details. The results indicated that the addition of CNF had obvious influence on the tightness, air permeability and tensile index of capacitor tissue paper. CNF could increase the tightness and tensile strenght, and decrease the air permeability, but the effect of CNF decreased with increasing the beating degree. Based on the Page equation, the increase of the beating degree and the addition of a small amount of CNF could increase the RBA of the paper. Considering the high tightness and low air permeability requirements of capacitor tissue paper, as well as the energy saving of beating and CNF cost, the optimal condition was decided as follows: the beating degree was 80°SR, and the CNF dosage was 2%. Under this condition, the tensile index reached to 76.0 N·m/g, the tightness was 0.80 g/cm3, and the air permeability was 0.233 μm/(Pa·s); the dielectric constant was 1.21, the dielectric loss was 0.037, and the field penetration was 15.13 kV/mm under the power frequency.
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