CN105369675A - 一种吸水系数低收缩率小的变压器用绝缘纸 - Google Patents

一种吸水系数低收缩率小的变压器用绝缘纸 Download PDF

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CN105369675A
CN105369675A CN201510739286.XA CN201510739286A CN105369675A CN 105369675 A CN105369675 A CN 105369675A CN 201510739286 A CN201510739286 A CN 201510739286A CN 105369675 A CN105369675 A CN 105369675A
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deionized water
mica
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李新满
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Tongling Sanjia Transformer Co Ltd
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Abstract

本发明公开了一种吸水系数低收缩率小的变压器用绝缘纸，由以下重量份的原料制备制成：硅烷偶联剂kh5500.6-0.7、云母6-8、甘氨酸1-1.5、硅烷偶联剂kh5700.3-0.4、乳化剂OP-100.1-0.2、十二烷基磺酸钠0.2-0.3、E44环氧树脂2-3、聚丙烯酰胺0.5-0.6、浆板500-550、碳化硅纤维2.8-3.4、磁化钙1-1.5、钢渣微粉1.2-1.5、聚丙烯腈纤维3.2-3.5、去离子水适量；本发明的制备方法简单，制备的绝缘纸具有良好的低吸水性，收缩率小，不易变形，用于变压器具有良好的前景，降低了安全隐患，值得推广。

Description

一种吸水系数低收缩率小的变压器用绝缘纸
技术领域
本发明涉及变压器技术领域，尤其涉及一种吸水系数低收缩率小的变压器用绝缘纸。
背景技术
近年来，随着我国电力、电气、电子、家电和通讯等行业的快速发展，人们对变压器的要求越来越高。纤维素绝缘纸是油浸式电力变压器中应用最广泛的内绝缘材料之一，由于运行期间无法更换，其机械及绝缘性能的好坏直接决定着变压器的使用寿命。实际变压器中，绝缘纸长期受到高强度电场应力的作用，一旦发生击穿将导致变压器故障。如能提升绝缘纸的电气性能，便可节省绝缘纸的使用量，延长绝缘纸的工作寿命，减小变压器油隙的宽度，进而限制变压器的体积和铁芯损耗，因此，开展绝缘纸的改性研究意义重大。云母是电气电子行业中不可缺少的绝缘材料。目前，虽然世界上已出现很多新型材料，但其中还没有一种绝缘材料能够完全取代云母。利用云母来改性绝缘纸可以得到性能更加优异的绝缘纸，但是目前国内外对于这方面的研究很少。
发明内容
本发明目的就是为了弥补已有技术的缺陷，提供一种吸水系数低收缩率小的变压器用绝缘纸。
本发明是通过以下技术方案实现的：
一种吸水系数低收缩率小的变压器用绝缘纸，由以下重量份的原料制备制成：硅烷偶联剂kh5500.6-0.7、云母6-8、甘氨酸1-1.5、硅烷偶联剂kh5700.3-0.4、乳化剂OP-100.1-0.2、十二烷基磺酸钠0.2-0.3、E44环氧树脂2-3、聚丙烯酰胺0.5-0.6、浆板500-550、碳化硅纤维2.8-3.4、磁化钙1-1.5、钢渣微粉1.2-1.5、聚丙烯腈纤维3.2-3.5、去离子水适量。
所述一种吸水系数低收缩率小的变压器用绝缘纸，由以下具体步骤制备制成：
（1）将硅烷偶联剂kh550加入到乙醇与水质量比为1:1的溶液中，水浴加热至35°C，滴加乙二酸调节PH值为4，水解1-1.5h，将云母片浸渍到75%的乙醇中搅拌浸泡1-2h，然后超声洗涤10-15min，再用去离子水浸泡0.5h，最后置于烘箱中于110°C下干燥2h，研磨备用；
（2）将上述制备的云母加到硅烷偶联剂kh550的水解液中，水浴温度控制在60-65°C，然后加入钢渣微粉和碳化硅纤维超声搅拌30-45min，过滤，用去离子水洗涤数次，之后在恒温鼓风干燥箱中于90°C下干燥2-3h备用；
（3）将甘氨酸用13倍量的水溶解后和硅烷偶联剂kh570、乳化剂OP-10、十二烷基磺酸钠和E44环氧树脂加到烧瓶中，控制水浴温度在80-85°C下缓慢搅拌3h，再加入磁化钙和聚丙烯腈纤维继续搅拌10-15min，然后加入氢氧化钠溶液调节PH值呈中性，再用高剪切分散乳化机将其乳化，得到稳定的改性水性环氧树脂乳液；
（4）将步骤（2）制备的改性云母、步骤（3）制备的改性水性环氧树脂乳液和聚丙烯酰胺混合，再加入适量的去离子水稀释成质量浓度在0.5-0.6%的浆料，将浆板浸泡后进行打浆，打浆度为40-45°SR时停止打浆，然后将浆料放入纤维解离器中，加入去离子水使浆料的浓度在2-2.5%进行解离，得到纸浆悬浊液备用；
（5）将纸浆悬浊液和云母浆料混合，用电力搅拌棒强力搅拌10min，然后继续解离15min，之后进行抄造、烘干即可得到绝缘纸。
本发明的优点是：本发明采用硅烷偶联剂kh550对云母进行表面改性，增强云母表面的侨联作用，改善和改性的水性环氧树脂乳液的相容性，提高了对云母表面的附着力，和纤维素纸浆混合能够大大提高其结合力与分散均匀性，增强了绝缘纸的拉伸强度、介电强度、电气性能和耐热性能等作用，添加的钢渣微粉和碳化硅纤维能够增强绝缘纸的耐磨、耐腐蚀、耐热等的性能，添加的磁化钙和聚丙烯腈纤维能够降低绝缘纸的吸水性、提高耐热性，不易收缩变形，本发明的制备方法简单，制备的绝缘纸具有良好的低吸水性，收缩率小，不易变形，用于变压器具有良好的前景，降低了安全隐患，值得推广。
具体实施方式
一种吸水系数低收缩率小的变压器用绝缘纸，由以下重量份（公斤）的原料制备制成：硅烷偶联剂kh5500.6、云母6、甘氨酸1、硅烷偶联剂kh5700.3、乳化剂OP、十二烷基磺酸钠0.2、E44环氧树脂2、聚丙烯酰胺0.5、浆板500、碳化硅纤维2.8、磁化钙1、钢渣微粉1.2、聚丙烯腈纤维3.2、去离子水适量。
所述一种吸水系数低收缩率小的变压器用绝缘纸，由以下具体步骤制备制成：
（1）将硅烷偶联剂kh550加入到乙醇与水质量比为1:1的溶液中，水浴加热至35°C，滴加乙二酸调节PH值为4，水解1h，将云母片浸渍到75%的乙醇中搅拌浸泡1h，然后超声洗涤10min，再用去离子水浸泡0.5h，最后置于烘箱中于110°C下干燥2h，研磨备用；
（2）将上述制备的云母加到硅烷偶联剂kh550的水解液中，水浴温度控制在60°C，然后加入钢渣微粉和碳化硅纤维超声搅拌30min，过滤，用去离子水洗涤数次，之后在恒温鼓风干燥箱中于90°C下干燥2h备用；
（3）将甘氨酸用13倍量的水溶解后和硅烷偶联剂kh570、乳化剂OP、十二烷基磺酸钠和E44环氧树脂加到烧瓶中，控制水浴温度在80°C下缓慢搅拌3h，再加入磁化钙和聚丙烯腈纤维继续搅拌10min，然后加入氢氧化钠溶液调节PH值呈中性，再用高剪切分散乳化机将其乳化，得到稳定的改性水性环氧树脂乳液；
（4）将步骤（2）制备的改性云母、步骤（3）制备的改性水性环氧树脂乳液和聚丙烯酰胺混合，再加入适量的去离子水稀释成质量浓度在0.5%的浆料，将浆板浸泡后进行打浆，打浆度为40°SR时停止打浆，然后将浆料放入纤维解离器中，加入去离子水使浆料的浓度在2%进行解离，得到纸浆悬浊液备用；
（5）将纸浆悬浊液和云母浆料混合，用电力搅拌棒强力搅拌10min，然后继续解离15min，之后进行抄造、烘干即可得到绝缘纸。
按照本实施例制备的绝缘纸其性能测试如下：击穿电压为4KV、介电强度为38KV/mm，绝缘纸的阻燃级别为V0级，纸白度≥80％，干抗拉强度为4.2KN/m，湿抗张强度为0.48KN/m，吸水高度52mm，透气度为20±4s，体积电阻率为0.9×106，表面电阻为4.2×104，介电常数为5.5，介电损耗因数为0.042。

Claims (2)

1.一种吸水系数低收缩率小的变压器用绝缘纸，其特征在于，由以下重量份的原料制备制成：硅烷偶联剂kh5500.6-0.7、云母6-8、甘氨酸1-1.5、硅烷偶联剂kh5700.3-0.4、乳化剂OP-100.1-0.2、十二烷基磺酸钠0.2-0.3、E44环氧树脂2-3、聚丙烯酰胺0.5-0.6、浆板500-550、碳化硅纤维2.8-3.4、磁化钙1-1.5、钢渣微粉1.2-1.5、聚丙烯腈纤维3.2-3.5、去离子水适量。
2.根据权利要求1所述一种吸水系数低收缩率小的变压器用绝缘纸，其特征在于，由以下具体步骤制备制成：
（1）将硅烷偶联剂kh550加入到乙醇与水质量比为1:1的溶液中，水浴加热至35°C，滴加乙二酸调节PH值为4，水解1-1.5h，将云母片浸渍到75%的乙醇中搅拌浸泡1-2h，然后超声洗涤10-15min，再用去离子水浸泡0.5h，最后置于烘箱中于110°C下干燥2h，研磨备用；
（2）将上述制备的云母加到硅烷偶联剂kh550的水解液中，水浴温度控制在60-65°C，然后加入钢渣微粉和碳化硅纤维超声搅拌30-45min，过滤，用去离子水洗涤数次，之后在恒温鼓风干燥箱中于90°C下干燥2-3h备用；
（3）将甘氨酸用13倍量的水溶解后和硅烷偶联剂kh570、乳化剂OP-10、十二烷基磺酸钠和E44环氧树脂加到烧瓶中，控制水浴温度在80-85°C下缓慢搅拌3h，再加入磁化钙和聚丙烯腈纤维继续搅拌10-15min，然后加入氢氧化钠溶液调节PH值呈中性，再用高剪切分散乳化机将其乳化，得到稳定的改性水性环氧树脂乳液；
（4）将步骤（2）制备的改性云母、步骤（3）制备的改性水性环氧树脂乳液和聚丙烯酰胺混合，再加入适量的去离子水稀释成质量浓度在0.5-0.6%的浆料，将浆板浸泡后进行打浆，打浆度为40-45°SR时停止打浆，然后将浆料放入纤维解离器中，加入去离子水使浆料的浓度在2-2.5%进行解离，得到纸浆悬浊液备用；
（5）将纸浆悬浊液和云母浆料混合，用电力搅拌棒强力搅拌10min，然后继续解离15min，之后进行抄造、烘干即可得到绝缘纸。
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