CN104086876A - 一种耐磨抗疲劳电容器薄膜专用填料及其制备方法 - Google Patents
一种耐磨抗疲劳电容器薄膜专用填料及其制备方法 Download PDFInfo
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Abstract
一种耐磨抗疲劳电容器薄膜专用填料,由下列重量份的原料制成:聚乙二醇1.2-1.5、防老剂MB4-7、硅酸铝8-10、硼砂1-1.5、五氧化二钒3.3-3.6、氧化锌7-9、异丙醇0.3-0.6、纳米蒙脱土6-9、硬脂酸0.1-0.3、液体古马隆0.1-0.3、粘土60-65、4-6%盐酸适量、水适量、助剂15-20;本发明填料添加了硅酸铝、氧化锌,能够增加聚丙烯薄膜的硬度、白度、耐磨性、耐候性、贮存稳定性;通过添加纳米蒙脱土,分散性好,能增加薄膜的强度、韧性和抗疲劳性能;通过使用粘土,降低了成本;通过使用本发明助剂,能提高填料的分散性、补强性能,能提高薄膜的强度和耐冲击韧性。
Description
技术领域
本发明属于电容器薄膜领域,特别涉及一种耐磨抗疲劳电容器薄膜专用填料及其制备方法。
背景技术
薄膜电容器由于具有很多优良的特性,因此是一种性能优秀的电容器。它的主要等性如下:无极性,绝缘阻抗很高,频率特性优异(频率响应宽广),而且介质损失很小。基于以上的优点,所以薄膜电容器被大量使用在模拟电路上。尤其是在信号交连的部份,必须使用频率特性良好,介质损失极低的电容器,方能确保信号在传送时,不致有太大的失真情形发生。
在所有的塑料薄膜电容当中,聚丙烯(PP)电容和聚苯乙烯(PS)电容的特性最为显著,所以近年来PP电容和PS电容被使用在音响器材的频率与数量也愈来愈高。单纯的聚丙烯(PP)薄膜虽然具有耐热、耐腐蚀,制品可用蒸汽消毒的突出优点,而且密度小,是最轻的通用塑料;但是其存在耐低温冲击性差,较易老化的缺点。聚苯乙烯(PS)薄膜具有极高的透明度,电绝缘性能好,易着色,加工流动性好,刚性好及耐化学腐蚀性好,但是比较脆,冲击强度低,易出现应力开裂,耐热性差及不耐沸水;因此需要对薄膜进行改性。而且随着电容器的应用范围逐渐增多,薄膜的性能也需要改善,比如耐热、耐低温、耐酸碱、耐腐蚀、强度、耐老化、耐紫外线、阻燃、耐磨、韧性、耐冲击等性能需要改善,可以通过添加填料改性来改善性能。
发明内容
本发明的目的在于提供一种耐磨抗疲劳电容器薄膜专用填料及其制备方法,该填料能够增加聚丙烯薄膜的硬度、白度、耐磨性、耐候性、贮存稳定性,分散性好,能增加薄膜的强度、韧性和抗疲劳性能。
本发明的技术方案如下:
一种耐磨抗疲劳电容器薄膜专用填料,其特征在于由下列重量份的原料制成:聚乙二醇1.2-1.5、防老剂MB4-7、硅酸铝8-10、硼砂1-1.5、五氧化二钒3.3-3.6、氧化锌7-9、异丙醇0.3-0.6、纳米蒙脱土6-9、硬脂酸0.1-0.3、液体古马隆0.1-0.3、粘土60-65、4-6%盐酸适量、水适量、助剂15-20;
所述助剂由下述重量份的原料制成:膨润土2-3、2-2.5% 氢氧化钠溶液10-15、乙炔炭黑2-3、甲基丙烯酸酯1-2、丙烯酸乙酯0.4-0.7、碳酸钙粉10-15、十二烷基苯磺酸钠0.1-0.2、硼酸镁晶须1-1.3、纳米锌粉2-4、聚四氟乙烯微粉0.4-0.6、柴胡油0.5-0.8、过硫酸钾0.1-0.2、水适量;制备方法为:膨润土与2-2.5% 氢氧化钠溶液混合,加热至70-80℃,搅拌反应20-30分钟,过滤,得滤渣,水洗至pH为7-8,烘干粉碎成2-50μm的颗粒;再将十二烷基苯磺酸钠加入适量水中,再加入所述膨润土颗粒、碳酸钙粉,搅拌均匀后加入甲基丙烯酸酯、丙烯酸乙酯,搅拌均匀后升温至70-80℃,加入过硫酸钾,搅拌反应20-30分钟,再加入乙炔炭黑、纳米锌粉,继续搅拌反应30-40分钟,烘干,与其他剩余成分混合,分散研磨成2-50μm的颗粒,即得。
所述的耐磨抗疲劳电容器薄膜专用填料的制备方法,其特征在于包括以下步骤:
(1)将粘土送入煅烧炉中,在700-800℃下煅烧2-3个小时,取出粉碎,过100目筛,再加入2-3倍的4-6%盐酸,加热至50-70℃,搅拌10-20分钟,过滤,得滤渣,按上述方法再酸洗一次,再水洗至中性,过滤,得颗粒;
(2)将聚乙二醇、防老剂MB、硼砂、五氧化二钒、异丙醇、硬脂酸、液体古马隆混合,研磨20-30分钟,得混合物料;
(3)将第(1)步和第(2)步得到的物料与硅酸铝、氧化锌混合,加入适量水搅拌成泥状,研磨成2-50μm的浆料,喷雾干燥,再与其他剩余成分混合均匀,即得。
本发明的有益效果
本发明填料添加了硅酸铝、氧化锌,能够增加聚丙烯薄膜的硬度、白度、耐磨性、耐候性、贮存稳定性;通过添加纳米蒙脱土,分散性好,能增加薄膜的强度、韧性和抗疲劳性能;通过使用粘土,降低了成本;通过使用本发明助剂,能提高填料的分散性、补强性能,能提高薄膜的强度和耐冲击韧性。
具体实施方式
一种耐磨抗疲劳电容器薄膜专用填料,由下列重量份(公斤)的原料制成:聚乙二醇1.3、防老剂MB5、硅酸铝9、硼砂1.3、五氧化二钒3.4、氧化锌8、异丙醇0.4、纳米蒙脱土8、硬脂酸0.2、液体古马隆0.2、粘土63、5%盐酸适量、水适量、助剂18;
所述助剂由下述重量份(公斤)的原料制成:膨润土2.5、2.3% 氢氧化钠溶液13、乙炔炭黑2.5、甲基丙烯酸酯1.5、丙烯酸乙酯0.6、碳酸钙粉13、十二烷基苯磺酸钠0.1、硼酸镁晶须1.2、纳米锌粉3、聚四氟乙烯微粉0.5、柴胡油0.6、过硫酸钾0.1、水适量;制备方法为:膨润土与2.3% 氢氧化钠溶液混合,加热至75℃,搅拌反应25分钟,过滤,得滤渣,水洗至pH为8,烘干粉碎成2-50μm的颗粒;再将十二烷基苯磺酸钠加入适量水中,再加入所述膨润土颗粒、碳酸钙粉,搅拌均匀后加入甲基丙烯酸酯、丙烯酸乙酯,搅拌均匀后升温至75℃,加入过硫酸钾,搅拌反应25分钟,再加入乙炔炭黑、纳米锌粉,继续搅拌反应35分钟,烘干,与其他剩余成分混合,分散研磨成2-50μm的颗粒,即得。
所述的耐磨抗疲劳电容器薄膜专用填料的制备方法,包括以下步骤:
(1)将粘土送入煅烧炉中,在750℃下煅烧2.5个小时,取出粉碎,过100目筛,再加入2.5倍的5%盐酸,加热至60℃,搅拌15分钟,过滤,得滤渣,按上述方法再酸洗一次,再水洗至中性,过滤,得颗粒;
(2)将聚乙二醇、防老剂MB、硼砂、五氧化二钒、异丙醇、硬脂酸、液体古马隆混合,研磨25分钟,得混合物料;
(3)将第(1)步和第(2)步得到的物料与硅酸铝、氧化锌混合,加入适量水搅拌成泥状,研磨成2-50μm的浆料,喷雾干燥,再与其他剩余成分混合均匀,即得。
实验数据:将本实施例的填料添加到聚丙烯电容器薄膜中,添加量为10-15%,薄膜厚度为2-50μm,薄膜击穿电压值≥ 0.60kV/μm(100℃)。
Claims (2)
1.一种耐磨抗疲劳电容器薄膜专用填料,其特征在于由下列重量份的原料制成:聚乙二醇1.2-1.5、防老剂MB4-7、硅酸铝8-10、硼砂1-1.5、五氧化二钒3.3-3.6、氧化锌7-9、异丙醇0.3-0.6、纳米蒙脱土6-9、硬脂酸0.1-0.3、液体古马隆0.1-0.3、粘土60-65、4-6%盐酸适量、水适量、助剂15-20;
所述助剂由下述重量份的原料制成:膨润土2-3、2-2.5% 氢氧化钠溶液10-15、乙炔炭黑2-3、甲基丙烯酸酯1-2、丙烯酸乙酯0.4-0.7、碳酸钙粉10-15、十二烷基苯磺酸钠0.1-0.2、硼酸镁晶须1-1.3、纳米锌粉2-4、聚四氟乙烯微粉0.4-0.6、柴胡油0.5-0.8、过硫酸钾0.1-0.2、水适量;制备方法为:膨润土与2-2.5% 氢氧化钠溶液混合,加热至70-80℃,搅拌反应20-30分钟,过滤,得滤渣,水洗至pH为7-8,烘干粉碎成2-50μm的颗粒;再将十二烷基苯磺酸钠加入适量水中,再加入所述膨润土颗粒、碳酸钙粉,搅拌均匀后加入甲基丙烯酸酯、丙烯酸乙酯,搅拌均匀后升温至70-80℃,加入过硫酸钾,搅拌反应20-30分钟,再加入乙炔炭黑、纳米锌粉,继续搅拌反应30-40分钟,烘干,与其他剩余成分混合,分散研磨成2-50μm的颗粒,即得。
2.根据权利要求1所述的耐磨抗疲劳电容器薄膜专用填料的制备方法,其特征在于包括以下步骤:
(1)将粘土送入煅烧炉中,在700-800℃下煅烧2-3个小时,取出粉碎,过100目筛,再加入2-3倍的4-6%盐酸,加热至50-70℃,搅拌10-20分钟,过滤,得滤渣,按上述方法再酸洗一次,再水洗至中性,过滤,得颗粒;
(2)将聚乙二醇、防老剂MB、硼砂、五氧化二钒、异丙醇、硬脂酸、液体古马隆混合,研磨20-30分钟,得混合物料;
(3)将第(1)步和第(2)步得到的物料与硅酸铝、氧化锌混合,加入适量水搅拌成泥状,研磨成2-50μm的浆料,喷雾干燥,再与其他剩余成分混合均匀,即得。
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