CN107400370A - 一种耐污型复合绝缘子伞套胶料的制备方法 - Google Patents
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Abstract
本发明涉及一种耐污型复合绝缘子伞套胶料的制备方法。本发明包括下列步骤:1)、超疏水混合纳米粉体材料预制:在流化床反应器内加入纳米二氧化硅、纳米二氧化钛、纳米磷酸钙质量份和纳米氧化锌,脱水干燥;硅氨烷、烷基硅氧烷以气流形式通入硫化床反应器,流态化反应,再抽真空脱除挥发份,制得混合纳米粉体材料;2)、伞套用胶料炼制:在炼胶机内加入氟化聚酰亚胺、氟硅橡胶和甲基乙烯基硅橡胶,混合后加入所述超疏水混合纳米粉体,炼制;再加入氧化铝、氧化钡和氧化锌超细粉剂,炼制;添加二茂铁、氯化铝、氯化钛、四二甲氨基铪和碘化铵,恒温混炼;加入过氧化物硫化引发剂,恒温混炼,至均匀;转移物料至双螺杆挤炼机,挤出制成伞套用胶料。
Description
技术领域
本发明属于复合绝缘子领域,特别涉及一种耐污型复合绝缘子伞套胶料的制备方法。
背景技术
随着时代的发展,复合绝缘子不断获得改进和改善,在电网使用复合绝缘子的规模越来越大。在我国复合绝缘子已应用到电力行业的高压、超高压和特高压各电压等级,绝缘子所受的机械负荷的加重,运行环境的多样性以及大气污染的加剧,复合绝缘子在使用中暴露出性能上的缺陷。复合绝缘子在脏污运行环境下比瓷绝缘子积污严重,抵消了其表面有一定憎水性的优势,甚至出现亲水、结垢、结冰、水解、溶胀等,引起表面电弧,发生闪络事故。
电力系统一直希望有一种能克服现有复合绝缘子不能满足特殊污秽、冰雪气象等缺陷的新型耐污复合绝缘子产品,具有超疏水疏油功能,在重污区、重冰区和雾霾等特殊运行环境下提供更高的运行可靠性。
超疏水性能是指物体表面对水接触角大于150°,自然界中存在许多超疏现象,人们最早发现,荷叶“出淤泥而不染”,水滴落上之后会滚落而不留痕迹。科学界经过研究发现,这种超疏水是荷叶表面的微米级凸起造成的,超疏水现象是由于固体表面的多级微米-纳米结构与低表面能组合的结果,并以此提出“二元协同作用”。
超疏水疏油表面在业界被广泛关注,报道的各种材料、制备方法很多,但对于最终的工业应用还有三个关键问题困扰。一是产品复杂的微纳材料的制备过程限制了其生产放大;二是构筑表面与基材的结合性和一定的耐用性;三是制备成本高昂限制了实际应用。把超疏水疏油表面引入到复合绝缘子制备上更是一个巨大的难题。
发明内容
为了克服现有技术的缺点,本发明提供一种耐污型复合绝缘子伞套胶料的制备方法。它方法简单,成本低,性能优良,制备过程无需溶胶-凝胶、纳米压印、光刻蚀,电化学沉积等繁琐复杂过程,易于工业化应用。
本发明包括下列步骤:
1)、超疏水混合纳米粉体材料预制:在流化床反应器内加入纳米二氧化硅120-150质量份、纳米二氧化钛80-100质量份、纳米磷酸钙40-70质量份和纳米氧化锌60-80质量份,在温度90-100℃、真空-0.09MPa下脱水干燥2h;硅氨烷100–150质量份、烷基硅氧烷60–100质量份分别以气流形式通入硫化床反应器,在150-180℃下流态化反应3-4h,再抽真空-0.09MPa下脱除挥发份1h,制得超疏水纳米粉体材料;
2)、伞套用胶料炼制:在炼胶机内加入氟化聚酰亚胺80-120质量份、氟硅橡胶100-150质量份和甲基乙烯基硅橡胶360-450质量份,混合后加入所述超疏水混合纳米粉体,在60-100℃下炼制1h;再加入氧化铝200-260质量份、氧化钡50-100质量份和氧化锌100-150质量份超细粉剂,在100-150℃下炼制2h;炼胶机内物料温度降至80℃时,添加二茂铁20-60质量份、氯化铝10-50质量份、氯化钛10-50质量份、四二甲氨基铪1-30质量份和碘化铵1-20质量份,恒温混炼1h;在温度为60℃下,加入过氧化物硫化引发剂2-5质量份,恒温混炼0.5h,至均匀;转移物料至双螺杆挤炼机,在氮气保护下,在20-60℃下挤炼,挤出制成伞套用胶料。
上述伞套胶料制成复合绝缘子伞套后,经高温升华反应,使伞套表层形成深度1mm以下、深度梯级分布的微纳结构,获得一种具有低表面能和微纳结构的超疏水的耐污型复合绝缘子。
本发明具有下列优点:1)、方法简单,成本低,性能优良,制备过程无需溶胶-凝胶、纳米压印、光刻蚀,电化学沉积等繁琐复杂过程,易于工业化应用;2)、表面因材料的低表面能性质和微纳结构形态,具有超疏水、疏油性,且具有优异的稳定性;3)、复合绝缘子伞套表面水的最大静态接触角超过155°,滚动角小于10°,超疏水效果显著;4)、在雨水下可实现自清洁,防止了伞套的水化和水解,在水泥、碳酸镁、硫酸钙等特殊污秽下不发生结垢,可防止低温冻雨天气的覆冰,以及解决直流系统用复合绝缘子吸附污秽的问题。
具体实施方式
实施例一
本发明包括下列步骤:
1)、超疏水混合纳米粉体材料预制:在流化床反应器内加入纳米二氧化硅120质量份、纳米二氧化钛80质量份、纳米磷酸钙40质量份和纳米氧化锌60质量份,在温度90℃、真空-0.09MPa下脱水干燥2h;硅氨烷100质量份、烷基硅氧烷60质量份以气流形式通入硫化床反应器,在150℃下流态化反应3h,再抽真空-0.09MPa下脱除挥发份1h,制得超疏水纳米粉体材料;
2)、伞套用胶料炼制:在炼胶机内加入氟化聚酰亚胺80质量份、氟硅橡胶150质量份和甲基乙烯基硅橡胶360质量份,混合后加入所述超疏水混合纳米粉体,在60℃下炼制1h;再加入氧化铝200质量份、氧化钡50质量份和氧化锌100质量份超细粉剂,在100℃下炼制2h;炼胶机内物料温度降至80℃时,添加二茂铁20质量份、氯化铝10质量份、氯化钛10质量份、四二甲氨基铪1质量份和碘化铵1质量份,恒温混炼1h;在温度为60℃下,加入过氧化物硫化引发剂2质量份,恒温混炼0.5h,至均匀;转移物料至双螺杆挤炼机,在氮气保护下,在40℃下挤炼,挤出制成伞套用胶料;
3)、复合绝缘子成型工艺:采用注射成型或护套挤包伞裙套装工艺,以注射成型为例:玻璃纤维增强树脂芯棒经打磨处理,在两头组装上端部金属附件,芯棒刷粘结剂后,置于注射成型机上模具内,所述的伞套用胶料经注射如模具并充满模腔,硫化成为复合绝缘子。硫化温度为140℃,硫化压力为15MPa;
4)、复合绝缘子伞套的超疏水活化
在反应罐内放入成型的复合绝缘子,升温至100℃,在真空度-0.095MPa下,经1h后的后固化和升华反应,复合绝缘子伞套表层生成微纳结构;继续升高温度至160℃,维持1h的升华反应,使伞套表层深度达0.1-0.5mm左右深度梯级分布的微纳结构,制备出具有低表面能和微纳结构的超疏水的伞套,获得一种耐污型复合绝缘子。
实施例二
本发明包括下列步骤:
1)、超疏水混合纳米粉体材料预制:在流化床反应器内加入纳米二氧化硅150质量份、纳米二氧化钛100质量份、纳米磷酸钙70质量份和纳米氧化锌80质量份,在温度100℃、真空-0.09MPa下脱水干燥2h;硅氨烷150质量份、烷基硅氧烷100质量份以气流形式通入硫化床反应器,在180℃下流态化反应4h,再抽真空-0.09MPa下脱除挥发份1h,制得超疏水纳米粉体材料;
2)、伞套用胶料炼制:在炼胶机内加入氟化聚酰亚胺120质量份、氟硅橡胶100质量份和甲基乙烯基硅橡胶450质量份,混合后加入所述超疏水混合纳米粉体,在100℃下炼制1h;再加入氧化铝260质量份、氧化钡100质量份和氧化锌150质量份超细粉剂,在150℃下炼制2h;炼胶机内物料温度降至80℃时,添加二茂铁60质量份、氯化铝50质量份、氯化钛50质量份、四二甲氨基铪30质量份和碘化铵20质量份,恒温混炼1h;在温度为60℃下,加入过氧化物硫化引发剂5质量份,恒温混炼0.5h,至均匀;转移物料至双螺杆挤炼机,在氮气保护下,在60℃下挤炼,挤出制成伞套用胶料
3)、复合绝缘子成型工艺:采用注射成型或护套挤包伞裙套装工艺,以护套挤包伞裙套装为例:玻璃纤维增强树脂芯棒经打磨处理,芯棒刷粘结剂后,伞套胶料挤出包覆在芯棒上预硫化,再以伞套胶料压制预硫化成伞裙套装到芯棒外,在两头组装上端部金属附件成为复合绝缘子。硫化温度为160℃,硫化压力为10MPa。
(4)复合绝缘子伞套的超疏水活化
在反应罐内放入成型的复合绝缘子,升温至130℃,在真空度-0.09MPa下,经1h后的后固化和升华反应,复合绝缘子伞套表层生成微纳结构。
继续升高温度至180℃,维持1h的升华反应,使伞套表层深度达0.1mm-1mm左右深度梯级分布的微纳结构,制备出具有低表面能和微纳结构的超疏水的伞套,获得一种耐污型复合绝缘子。
Claims (1)
1.一种耐污型复合绝缘子伞套胶料的制备方法,其特征在于:本发明包括下列步骤:
1)、超疏水混合纳米粉体材料预制:在流化床反应器内加入纳米二氧化硅120-150质量份、纳米二氧化钛80-100质量份、纳米磷酸钙40-70质量份和纳米氧化锌60-80质量份,在温度90-100℃、真空-0.09MPa下脱水干燥2h;硅氨烷100-150质量份、烷基硅氧烷60-100质量份以气流形式通入硫化床反应器,在150-180℃下流态化反应3-4h,再抽真空-0.09MPa下脱除挥发份1h,制得超疏水纳米粉体材料;
2)、伞套用胶料炼制:在炼胶机内加入氟化聚酰亚胺80-120质量份、氟硅橡胶100-150质量份和甲基乙烯基硅橡胶360-450质量份,混合后加入所述超疏水混合纳米粉体,在60-100℃下炼制1h;再加入氧化铝200-260质量份、氧化钡50-100质量份和氧化锌100-150质量份超细粉剂,在100-150℃下炼制2h;炼胶机内物料温度降至80℃时,添加二茂铁20-60质量份、氯化铝10-50质量份、氯化钛10-50质量份、四二甲氨基铪1-30质量份和碘化铵1-20质量份,恒温混炼1h;在温度为60℃下,加入过氧化物硫化引发剂2-5质量份,恒温混炼0.5h,至均匀;转移物料至双螺杆挤炼机,在氮气保护下,在20-60℃下挤炼,挤出制成伞套用胶料。
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