CN109036843B - 一种防火耐击穿薄膜电容器 - Google Patents
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- GJBRNHKUVLOCEB-UHFFFAOYSA-N tert-butyl benzenecarboperoxoate Chemical group CC(C)(C)OOC(=O)C1=CC=CC=C1 GJBRNHKUVLOCEB-UHFFFAOYSA-N 0.000 claims description 5
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Abstract
本发明公开了一种防火耐击穿薄膜电容器,涉及薄膜电容器技术领域,包括由大分子共聚物改性聚丙烯母粒制成的复合薄膜作为薄膜电容器的电介质,本发明由大分子共聚物改性聚丙烯母粒制成的复合薄膜作为薄膜电容器的电介质,通过对聚丙烯薄膜的改性处理,显著的改善了聚丙烯薄膜的耐拉伸性能,尤其是通过采用大分子共聚物对聚丙烯母粒的改性,极大的改善了复合薄膜内的分子结构,提高了分子之间的键能,极大的提高了其耐高温能力,降低了损耗系数相较于,经济效益显著。
Description
技术领域
本发明属于薄膜电容器技术领域,具体涉及一种防火耐击穿薄膜电容器。
背景技术
电容器是集成电路中使用很广的一类元器件,适用于需要DC阻隔、RF旁路的芯片与引线电路,还可在滤波器、振荡器和匹配网络中作调谐元件。目前市场上使用较多的是金属化聚丙烯膜在卷绕成电容器卷芯,但是单纯聚丙烯薄膜电容器的耐电压击穿能力较差,从而导致其应用范围受到了极大的限制。
发明内容
本发明的目的是针对现有的问题,提供了一种防火耐击穿薄膜电容器。
本发明是通过以下技术方案实现的:
一种防火耐击穿薄膜电容器,由大分子共聚物改性聚丙烯母粒制成的复合薄膜作为薄膜电容器的电介质。
进一步的,所述大分子共聚物改性聚丙烯母粒制备方法为:
按重量份分别称取反-2-丁烯120-150份、丙烯腈30-50份、富马酸二乙酯120-160份,去离子水1250-1300份、乳化剂10-12份、纳米膨润土分散液5-7份、活化剂0.03-0.08份添加到反应釜中,以1500r/min转速搅拌2-3小时,然后持续通入氮气气体20min,再加热至35℃,保温10min,然后再添加引发剂1.2-1.5份,搅拌均匀后,在35℃水浴保温下反应10-12小时,然后出料,提纯反应产物,干燥至恒重,即得大分子共聚物;
将大分子共聚物与聚丙烯树脂按1:6-8质量比例均匀混合到一起,分别经过干燥,再添加到双螺杆挤出机中,挤出造粒,即得大分子共聚物改性聚丙烯母粒。
进一步的,所述乳化剂为月桂醇聚氧乙烯醚。
进一步的,所述纳米膨润土分散液制备方法为:
将纳米膨润土按1:20质量比分散于苯乙烯后,再加入苯乙烯质量0.2%的交联剂,混合均匀后加热至90℃,保温5min,再滴入苯乙烯质量5%的过硫酸钾的水溶液搅拌均匀,保温反应20小时,然后进行过滤,洗涤,干燥至恒重,再将纳米膨润土均匀分散到去离子水中,配制成质量分数为10.5%的纳米膨润土分散液,即得。
进一步的,所述过硫酸钾的水溶液质量分数为10%。
进一步的,所述活化剂为乙二胺四乙酸。
进一步的,所述引发剂为过氧化苯甲酸叔丁酯。
进一步的,所述复合薄膜制备方法为:将大分子共聚物改性聚丙烯母粒添加到吹膜机中,吹膜定型,温度控制在282℃,然后将得到的复合薄膜依次经过冷却辊冷却、牵引拉伸、厚度测量、切边、卷绕成膜、检验、入库,即得。
进一步的,所述防火耐击穿薄膜电容器为铝外壳。
本发明相比现有技术具有以下优点:经过检测:本实施例中复合薄膜耐高温142℃,使用寿命能达到190000h;本发明由大分子共聚物改性聚丙烯母粒制成的复合薄膜作为薄膜电容器的电介质,通过对聚丙烯薄膜的改性处理,显著的改善了聚丙烯薄膜的耐拉伸性能,尤其是通过采用大分子共聚物对聚丙烯母粒的改性,极大的改善了复合薄膜内的分子结构,提高了分子之间的键能,极大的提高了其耐高温能力,降低了损耗系数相较于,经济效益显著,同时能够在一定程度上提高薄膜电容的范围,并且能够提高漏电电阻阻值,增强薄膜电容的抗击穿性能,进而能够提高电容器的使用寿命,并且,制成薄膜电容器后,介电强度相较于普通聚丙烯薄膜电容器能提高350VDC/μF。
具体实施方式
实施例1
一种防火耐击穿薄膜电容器,由大分子共聚物改性聚丙烯母粒制成的复合薄膜作为薄膜电容器的电介质。
进一步的,所述大分子共聚物改性聚丙烯母粒制备方法为:
按重量份分别称取反-2-丁烯120份、丙烯腈30份、富马酸二乙酯120份,去离子水1250份、乳化剂10份、纳米膨润土分散液5份、活化剂0.03份添加到反应釜中,以1500r/min转速搅拌2小时,然后持续通入氮气气体20min,再加热至35℃,保温10min,然后再添加引发剂1.2份,搅拌均匀后,在35℃水浴保温下反应10小时,然后出料,提纯反应产物,干燥至恒重,即得大分子共聚物;
将大分子共聚物与聚丙烯树脂按1:6质量比例均匀混合到一起,分别经过干燥,再添加到双螺杆挤出机中,挤出造粒,即得大分子共聚物改性聚丙烯母粒。
进一步的,所述乳化剂为月桂醇聚氧乙烯醚。
进一步的,所述纳米膨润土分散液制备方法为:
将纳米膨润土按1:20质量比分散于苯乙烯后,再加入苯乙烯质量0.2%的交联剂,混合均匀后加热至90℃,保温5min,再滴入苯乙烯质量5%的过硫酸钾的水溶液搅拌均匀,保温反应20小时,然后进行过滤,洗涤,干燥至恒重,再将纳米膨润土均匀分散到去离子水中,配制成质量分数为10.5%的纳米膨润土分散液,即得。
进一步的,所述过硫酸钾的水溶液质量分数为10%。
进一步的,所述活化剂为乙二胺四乙酸。
进一步的,所述引发剂为过氧化苯甲酸叔丁酯。
进一步的,所述复合薄膜制备方法为:将大分子共聚物改性聚丙烯母粒添加到吹膜机中,吹膜定型,温度控制在282℃,然后将得到的复合薄膜依次经过冷却辊冷却、牵引拉伸、厚度测量、切边、卷绕成膜、检验、入库,即得。
进一步的,所述防火耐击穿薄膜电容器为铝外壳。
实施例2
一种防火耐击穿薄膜电容器,由大分子共聚物改性聚丙烯母粒制成的复合薄膜作为薄膜电容器的电介质。
进一步的,所述大分子共聚物改性聚丙烯母粒制备方法为:
按重量份分别称取反-2-丁烯150份、丙烯腈50份、富马酸二乙酯160份,去离子水1300份、乳化剂12份、纳米膨润土分散液7份、活化剂0.08份添加到反应釜中,以1500r/min转速搅拌3小时,然后持续通入氮气气体20min,再加热至35℃,保温10min,然后再添加引发剂1.5份,搅拌均匀后,在35℃水浴保温下反应12小时,然后出料,提纯反应产物,干燥至恒重,即得大分子共聚物;
将大分子共聚物与聚丙烯树脂按1: 8质量比例均匀混合到一起,分别经过干燥,再添加到双螺杆挤出机中,挤出造粒,即得大分子共聚物改性聚丙烯母粒。
进一步的,所述乳化剂为月桂醇聚氧乙烯醚。
进一步的,所述纳米膨润土分散液制备方法为:
将纳米膨润土按1:20质量比分散于苯乙烯后,再加入苯乙烯质量0.2%的交联剂,混合均匀后加热至90℃,保温5min,再滴入苯乙烯质量5%的过硫酸钾的水溶液搅拌均匀,保温反应20小时,然后进行过滤,洗涤,干燥至恒重,再将纳米膨润土均匀分散到去离子水中,配制成质量分数为10.5%的纳米膨润土分散液,即得。
进一步的,所述过硫酸钾的水溶液质量分数为10%。
进一步的,所述活化剂为乙二胺四乙酸。
进一步的,所述引发剂为过氧化苯甲酸叔丁酯。
进一步的,所述复合薄膜制备方法为:将大分子共聚物改性聚丙烯母粒添加到吹膜机中,吹膜定型,温度控制在282℃,然后将得到的复合薄膜依次经过冷却辊冷却、牵引拉伸、厚度测量、切边、卷绕成膜、检验、入库,即得。
进一步的,所述防火耐击穿薄膜电容器为铝外壳。
实施例3
一种防火耐击穿薄膜电容器,由大分子共聚物改性聚丙烯母粒制成的复合薄膜作为薄膜电容器的电介质。
进一步的,所述大分子共聚物改性聚丙烯母粒制备方法为:
按重量份分别称取反-2-丁烯130份、丙烯腈40份、富马酸二乙酯150份,去离子水1270份、乳化剂11份、纳米膨润土分散液6份、活化剂0.05份添加到反应釜中,以1500r/min转速搅拌2.3小时,然后持续通入氮气气体20min,再加热至35℃,保温10min,然后再添加引发剂1.4份,搅拌均匀后,在35℃水浴保温下反应11小时,然后出料,提纯反应产物,干燥至恒重,即得大分子共聚物;
将大分子共聚物与聚丙烯树脂按1:7质量比例均匀混合到一起,分别经过干燥,再添加到双螺杆挤出机中,挤出造粒,即得大分子共聚物改性聚丙烯母粒。
进一步的,所述乳化剂为月桂醇聚氧乙烯醚。
进一步的,所述纳米膨润土分散液制备方法为:
将纳米膨润土按1:20质量比分散于苯乙烯后,再加入苯乙烯质量0.2%的交联剂,混合均匀后加热至90℃,保温5min,再滴入苯乙烯质量5%的过硫酸钾的水溶液搅拌均匀,保温反应20小时,然后进行过滤,洗涤,干燥至恒重,再将纳米膨润土均匀分散到去离子水中,配制成质量分数为10.5%的纳米膨润土分散液,即得。
进一步的,所述过硫酸钾的水溶液质量分数为10%。
进一步的,所述活化剂为乙二胺四乙酸。
进一步的,所述引发剂为过氧化苯甲酸叔丁酯。
进一步的,所述复合薄膜制备方法为:将大分子共聚物改性聚丙烯母粒添加到吹膜机中,吹膜定型,温度控制在282℃,然后将得到的复合薄膜依次经过冷却辊冷却、牵引拉伸、厚度测量、切边、卷绕成膜、检验、入库,即得。
进一步的,所述防火耐击穿薄膜电容器为铝外壳。
对比例1:与实施例1区别仅在于大分子共聚物改性聚丙烯制备过程中不添加纳米硅藻土分散液。
对比例2:与实施例1区别仅在于大分子共聚物改性聚丙烯制备过程中不添加富马酸二乙酯。
对比例3:与实施例1区别仅在于纳米膨润土分散液由未处理的纳米膨润土与去离子水混合制成。
对照组:纯聚丙烯薄膜。
试验:
试验:按GB/T10003-2008《普通用途双向拉伸聚丙烯薄膜》检测拉伸强度,按照GB/T1040.3-2006《塑料拉伸性能的测定》的规定进行,采用长150mm、宽15mm的长方形试样,夹具间距为100mm,试验速度为(250±25)mm/min,对实施例中复合薄膜和同规格的聚丙烯薄膜进行试验;
表1
由表1可以看出,本发明提供的复合薄膜具有优异的力学性能。
将实施例与对比例制备的电介质在绝缘强度测试仪上检测不同电压下的击穿几率(%):
表2
由表2可以看出,本发明制备的电介质具有优异的耐击穿性能。
进一步检测:本实施例中复合薄膜耐高温142℃,使用寿命能达到190000h。
Claims (1)
1.一种防火耐击穿薄膜电容器,其特征在于,包括由大分子共聚物改性聚丙烯母粒制成的复合薄膜作为薄膜电容器的电介质;所述大分子共聚物改性聚丙烯母粒制备方法为:
按重量份分别称取反-2-丁烯120-150份、丙烯腈30-50份、富马酸二乙酯120-160份,去离子水1250-1300份、乳化剂10-12份、纳米膨润土分散液5-7份、活化剂0.03-0.08份添加到反应釜中,以1500r/min转速搅拌2-3小时,然后持续通入氮气气体20min,再加热至35℃,保温10min,然后再添加引发剂1.2-1.5份,搅拌均匀后,在35℃水浴保温下反应10-12小时,然后出料,提纯反应产物,干燥至恒重,即得大分子共聚物;
将大分子共聚物与聚丙烯树脂按1:6-8质量比例均匀混合到一起,分别经过干燥,再添加到双螺杆挤出机中,挤出造粒,即得大分子共聚物改性聚丙烯母粒;所述乳化剂为月桂醇聚氧乙烯醚;所述纳米膨润土分散液制备方法为:
将纳米膨润土按1:20质量比分散于苯乙烯后,再加入苯乙烯质量0.2%的交联剂,混合均匀后加热至90℃,保温5min,再滴入苯乙烯质量5%的过硫酸钾的水溶液搅拌均匀,保温反应20小时,然后进行过滤,洗涤,干燥至恒重,再将纳米膨润土均匀分散到去离子水中,配制成质量分数为10.5%的纳米膨润土分散液,即得;所述过硫酸钾的水溶液质量分数为10%;所述活化剂为乙二胺四乙酸;所述引发剂为过氧化苯甲酸叔丁酯;所述复合薄膜制备方法为:将大分子共聚物改性聚丙烯母粒添加到吹膜机中,吹膜定型,温度控制在282℃,然后将得到的复合薄膜依次经过冷却辊冷却、牵引拉伸、厚度测量、切边、卷绕成膜、检验、入库,即得;所述防火耐击穿薄膜电容器为铝外壳。
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