CN107828464A - 一种电力用导电膏组合物及其制备方法 - Google Patents

一种电力用导电膏组合物及其制备方法 Download PDF

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CN107828464A
CN107828464A CN201710964969.4A CN201710964969A CN107828464A CN 107828464 A CN107828464 A CN 107828464A CN 201710964969 A CN201710964969 A CN 201710964969A CN 107828464 A CN107828464 A CN 107828464A
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conductive paste
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周顺
张猛
于正华
陈雨新
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State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Yancheng Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Yancheng Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
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Abstract

导电膏又称电力复合脂，是一种新型的电工材料，可用于电力接头的接触面，降阻防腐、节电效果显著。但目前常用的导电膏电导能力差、电阻大、润滑能力差不易溶解于添加剂中。本发明提供一种电力用导电膏组合物及其制备方法，包括基础油、锂盐、氢氧化锂水溶液、稠化剂、润滑添加剂，导电性能优异、电阻小、润滑性好。

Description

一种电力用导电膏组合物及其制备方法
技术领域
发明属于电力工业领域，具体涉及一种电力用导电膏组合物及其制备方法。
背景技术
一般的，接触电阻产生主要有两个原因：第一，由于接触面的凹凸不平，金属实际接触面积减小，当电流流过导体的时候，其接触面有效导电界面减小；第二，接触面在空气中形成一层氧化层，氧化层附着于金属表面，使电阻增大。接触电阻过大使得通过的电能产生损耗，且电流通过时产生高热量加速金属材料老化。
导电膏又称电力复合脂，是一种新型的电工材料，可用于电力接头的接触面，降阻防腐、节电效果显著。导电膏中细粒填充在接触面的缝隙中，等同于增大了导电接触面，金属细粒在压缩力或螺栓紧固力作用下，能破碎接触面上金属氧化层，使接触电阻下降，相应接头温升也降低，使接头寿命延长。
目前常用的导电膏电导能力差、工作过程中自身易降解、高温条件下易腐蚀金属合金，且润滑能力差不易溶解于添加剂中。
发明内容
针对上述问题，本发明提供一种电力用导电膏组合物，导电性能优异，润滑性好。
本发明为一种电力用导电膏组合物，包括如下重量百分比的原料：基础油40～50％，锂盐：5～10％，，氢氧化锂水溶液：10～20％，稠化剂：10～20％，润滑添加剂：1～5％。
进一步的，所述的基础油为石蜡油、三羟甲基丙烷油、季戊四醇油酸脂、偏苯三酸脂、环状聚二甲基硅氧烷中的至少一种。
进一步的，所述的锂盐为四氟硼酸锂或六氟磷酸锂中的至少一种。
进一步的，所述的氢氧化锂水溶液的浓度为5mol/L。
进一步的，所述的稠化剂为聚四氟乙烯、膨润土和硅胶中的至少一种。
进一步的，所述的润滑添加剂为12-羟基硬脂酸和葵二酸中的至少一种。
根据上述的一种电力用导电膏组合物的制备方法，包括以下步骤：
(1)将基础油与润滑添加剂加入反应设备，加热至120℃，恒温搅拌均匀，保持10～20min；
(2)将预热至80℃的氢氧化锂水溶液缓慢加入步骤(1)反应之后的设备中，升温至120℃，恒温搅拌3～4h；
(3)将恒温搅拌后的混合物料迅速升温至205℃，10min后冷却至室温；
(4)将冷却至室温的混合物料在三辊研磨机上研磨三次以上，得到基础脂，再将锂盐加入基础脂中反复研磨三次以上，得到导电膏组合物。
本发明的积极效果如下：
1.锂盐的加入能大幅降低润滑脂的体积电阻率，提高润滑脂的导电率，减小接触电阻，具有优良的导电性。
2.锂盐的加入能降低摩擦因数，减小磨损体积，体现优良的摩擦学性能。
3.在摩擦磨损过程中，锂盐中的阴离子起到了重要作用，接触面金属发生化学反应，形成化学反应膜，起到了润滑减磨的作用。
具体实施方式
实施例1
一种电力用导电膏组合物，包括如下重量百分比的原料：基础油40％，锂盐：5％，，氢氧化锂水溶液：10％，稠化剂：20％，润滑添加剂：1％。
所述的基础油为偏苯三酸脂。
所述的锂盐为四氟硼酸锂。
所述的氢氧化锂水溶液的浓度为5mol/L。
所述的稠化剂为聚四氟乙烯。
所述的润滑添加剂为12-羟基硬脂酸。
上述一种电力用导电膏组合物的制备方法，包括以下步骤：
(1)将基础油与润滑添加剂加入反应设备，加热至120℃，恒温搅拌均匀，保持10～20min；
(2)将预热至80℃的氢氧化锂水溶液缓慢加入步骤(1)反应之后的设备中，升温至120℃，恒温搅拌3～4h；
(3)将恒温搅拌后的混合物料迅速升温至205℃，10min后冷却至室温；
(4)将冷却至室温的混合物料在三辊研磨机上研磨三次以上，得到基础脂，再将锂盐加入基础脂中反复研磨三次以上，得到导电膏组合物。
实施例2
一种电力用导电膏组合物，包括如下重量百分比的原料：基础油50％，锂盐：10％，，氢氧化锂水溶液：20％，稠化剂：10％，润滑添加剂：5％。
所述的基础油为三羟甲基丙烷油。
所述的锂盐为六氟磷酸锂。
所述的氢氧化锂水溶液的浓度为5mol/L。
所述的稠化剂为膨润土。
所述的润滑添加剂为葵二酸中。
上述一种电力用导电膏组合物的制备方法，包括以下步骤：
(1)将基础油与润滑添加剂加入反应设备，加热至120℃，恒温搅拌均匀，保持10～20min；
(2)将预热至80℃的氢氧化锂水溶液缓慢加入步骤(1)反应之后的设备中，升温至120℃，恒温搅拌3～4h；
(3)将恒温搅拌后的混合物料迅速升温至205℃，10min后冷却至室温；
(4)将冷却至室温的混合物料在三辊研磨机上研磨三次以上，得到基础脂，再将锂盐加入基础脂中反复研磨三次以上，得到导电膏组合物。
本发明实施例所制得电力用导电膏组合物的性能与普通导电膏性能对比见如下表格：
最后应该说明的是，结合上述实施例仅说明本发明的技术方案而非对其限制。所属领域的普通技术人员应当理解到，本领域技术人员可以对本发明的具体实施方式进行修改或者等同替换，但这些修改或变更均在申请待批的权利要求保护范围之中。

Claims (7)

1.一种电力用导电膏组合物，其特征在于，包括如下重量百分比的原料：基础油40～50％，锂盐5～10％，氢氧化锂水溶液10～20％，稠化剂10～20％，润滑添加剂1～5％。
2.根据权利要求1所述的一种电力用导电膏组合物，其特征在于，所述的基础油为石蜡油、三羟甲基丙烷油、季戊四醇油酸脂、偏苯三酸脂、环状聚二甲基硅氧烷中的至少一种。
3.根据权利要求1所述的一种电力用导电膏组合物，其特征在于，所述的锂盐为四氟硼酸锂或六氟磷酸锂中的至少一种。
4.根据权利要求1所述的一种电力用导电膏组合物，其特征在于，所述的氢氧化锂水溶液的浓度为5mol/L。
5.根据权利要求1所述的一种电力用导电膏组合物，其特征在于，所述的稠化剂为聚四氟乙烯、膨润土和硅胶中的至少一种。
6.根据权利要求1所述的一种电力用导电膏组合物，其特征在于，所述的润滑添加剂为12-羟基硬脂酸和葵二酸中的至少一种。
7.根据权利要求1所述的一种电力用导电膏组合物的制备方法，其特征在于，包括以下步骤：
(1)将基础油与润滑添加剂加入反应设备，加热至120℃，恒温搅拌均匀，保持10～20min；
(2)将预热至80℃的氢氧化锂水溶液缓慢加入步骤(1)反应之后的设备中，升温至120℃，恒温搅拌3～4h；
(3)将恒温搅拌后的混合物料迅速升温至205℃，10min后冷却至室温；
(4)将冷却至室温的混合物料在三辊研磨机上研磨三次以上，得到基础脂，再将锂盐加入基础脂中反复研磨三次以上，得到导电膏组合物。
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