CN112480832B - 一种高耐压绝缘聚酯复合膜的制备方法 - Google Patents
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Abstract
本发明属于变压器领域,具体涉及一种高耐压绝缘聚酯复合膜的制备方法,包括如下步骤:步骤1,将聚对苯二甲酸乙二醇酯单膜加入至乙醇水溶液中微波反应10‑20min,然后放入反应釜中热氮气烘干,得到洁净的聚酯单膜;步骤2,将聚酯单膜表面涂覆对氯苯酚,形成表面液膜,且其中一个表面喷涂水膜,得到带液膜的聚酯单膜;步骤3,将苯基三氯硅烷加入至苯中,低温超声形成溶解液,然后将溶解液均匀喷雾在聚酯单膜中不含水的表面液膜上,静置10‑20min得到带混合液膜的聚酯单膜;步骤4,将数片聚酯单膜叠合,且相邻的聚酯单膜间水膜与混合液膜对应叠合,然后恒温挤压形成聚酯复合膜。
Description
技术领域
本发明属于变压器领域,具体涉及一种高耐压绝缘聚酯复合膜的制备方法。
背景技术
干式变压器广泛用于局部照明、高层建筑、机场,码头CNC机械设备等场所,简单的说干式变压器就是指铁芯和绕组不浸渍在绝缘油中的变压器:主要由硅钢片组成的铁芯和环氧树脂浇注的线圈组成,高低压线圈之间放置绝缘筒增加电气绝缘,并由垫块支撑和约束线圈,其零部件搭接的紧固件均有防松性能。在实际使用过程中,聚酯复合膜作为绝缘筒,起到了良好的绝缘效果,但是在长期使用过程中,聚酯复合膜基于粘合剂的材质问题,在高电压环境下极易出现内鼓开裂等问题。
发明内容
针对现有技术中的问题,本发明提供一种高耐压绝缘聚酯复合膜的制备方法,解决了聚酯复合膜稳定差,使用寿命短的问题,利用苯基硅树脂作为粘结剂,不仅利用硅树脂本身的绝缘性,有效的提升了复合膜的整体绝缘性,保证局部绝缘性依然保持稳定,而且采用微溶交错结构形成强力粘合。
为实现以上技术目的,本发明的技术方案是:
一种高耐压绝缘聚酯复合膜的制备方法,包括如下步骤:
步骤1,将聚对苯二甲酸乙二醇酯单膜加入至乙醇水溶液中微波反应10-20min,然后放入反应釜中热氮气烘干,得到洁净的聚酯单膜;
步骤2,将聚酯单膜表面涂覆对氯苯酚,形成表面液膜,且其中一个表面喷涂水膜,得到带液膜的聚酯单膜;
步骤3,将苯基三氯硅烷加入至苯中,低温超声形成溶解液,然后将溶解液均匀喷雾在聚酯单膜中不含水的表面液膜上,静置10-20min得到带混合液膜的聚酯单膜;
步骤4,将数片聚酯单膜叠合,且相邻的聚酯单膜间水膜与混合液膜对应叠合,然后恒温挤压形成聚酯复合膜。
所述步骤1中的乙醇水溶液的乙醇体积含量为60-80%,微波反应的温度为40-50℃,微波功率为200-400W;所述热氮气烘干的温度为100-130℃。
所述步骤2中的涂覆对氯苯酚的量为1-3mL/cm2,所述喷涂液膜的量为0.01-0.02mL/cm2。
所述步骤3中的苯基三氯硅烷在苯中的浓度为10-20g/L,低温超声的温度为2-8℃,超声频率为80-100kHz,所述均匀喷雾的喷雾量为0.5-0.9mL/cm2,静置温度为30-50℃。
所述步骤4中的恒温挤压的温度为100-120℃,挤压压力为1.2-1.5MPa。
从以上描述可以看出,本发明具备以下优点:
1.本发明解决了聚酯复合膜稳定差,使用寿命短的问题,利用苯基硅树脂作为粘结剂,不仅利用硅树脂本身的绝缘性,有效的提升了复合膜的整体绝缘性,保证局部绝缘性依然保持稳定,而且采用微溶交错结构形成强力粘合。
2.本发明采用苯基三氯硅烷在苯中的溶解性,以及对氯苯酚与苯的溶解体系,实现了苯基三氯硅烷的内外渗透效果,形成苯基硅树脂的粘结和聚酯的相邻同质结合,提升复合膜的粘结稳定性。
具体实施方式
结合实施例详细说明本发明,但不对本发明的权利要求做任何限定。
实施例1
一种高耐压绝缘聚酯复合膜的制备方法,包括如下步骤:
步骤1,将聚对苯二甲酸乙二醇酯单膜加入至1L乙醇水溶液中微波反应10min,然后放入反应釜中热氮气烘干,得到洁净的聚酯单膜;所述乙醇水溶液的乙醇体积含量为60%,微波反应的温度为40℃,微波功率为200W;所述热氮气烘干的温度为100℃;
步骤2,将聚酯单膜表面涂覆对氯苯酚,形成表面液膜,且其中一个表面喷涂水膜,得到带液膜的聚酯单膜;所述涂覆对氯苯酚的量为1mL/cm2,所述喷涂液膜的量为0.01mL/cm2。
步骤3,将苯基三氯硅烷加入至1L苯中,低温超声形成溶解液,然后将溶解液均匀喷雾在聚酯单膜中不含水的表面液膜上,静置10min得到带混合液膜的聚酯单膜;所述苯基三氯硅烷在苯中的浓度为10g/L,低温超声的温度为2℃,超声频率为80kHz,所述均匀喷雾的喷雾量为0.5mL/cm2,静置温度为30℃;
步骤4,将数片聚酯单膜叠合,且相邻的聚酯单膜间水膜与混合液膜对应叠合,然后恒温挤压形成聚酯复合膜;所述恒温挤压的温度为100℃,挤压压力为1.2MPa。
本实施例制备的聚酯复合膜的耐电压为60kV,耐温为230℃,承压为0.9MPa。
实施例2
一种高耐压绝缘聚酯复合膜的制备方法,包括如下步骤:
步骤1,将聚对苯二甲酸乙二醇酯单膜加入至1L乙醇水溶液中微波反应20min,然后放入反应釜中热氮气烘干,得到洁净的聚酯单膜;所述乙醇水溶液的乙醇体积含量为80%,微波反应的温度为50℃,微波功率为400W;所述热氮气烘干的温度为130℃;
步骤2,将聚酯单膜表面涂覆对氯苯酚,形成表面液膜,且其中一个表面喷涂水膜,得到带液膜的聚酯单膜;所述涂覆对氯苯酚的量为3mL/cm2,所述喷涂液膜的量为0.02mL/cm2。
步骤3,将苯基三氯硅烷加入至1L苯中,低温超声形成溶解液,然后将溶解液均匀喷雾在聚酯单膜中不含水的表面液膜上,静置20min得到带混合液膜的聚酯单膜;所述苯基三氯硅烷在苯中的浓度为20g/L,低温超声的温度为8℃,超声频率为100kHz,所述均匀喷雾的喷雾量为0.9mL/cm2,静置温度为50℃;
步骤4,将数片聚酯单膜叠合,且相邻的聚酯单膜间水膜与混合液膜对应叠合,然后恒温挤压形成聚酯复合膜;所述恒温挤压的温度为120℃,挤压压力为1.5MPa。
本实施例制备的聚酯复合膜的耐电压为90kV,耐温为240℃,承压为1.1MPa。
实施例3
一种高耐压绝缘聚酯复合膜的制备方法,包括如下步骤:
步骤1,将聚对苯二甲酸乙二醇酯单膜加入至1L乙醇水溶液中微波反应15min,然后放入反应釜中热氮气烘干,得到洁净的聚酯单膜;所述乙醇水溶液的乙醇体积含量为70%,微波反应的温度为45℃,微波功率为300W;所述热氮气烘干的温度为120℃;
步骤2,将聚酯单膜表面涂覆对氯苯酚,形成表面液膜,且其中一个表面喷涂水膜,得到带液膜的聚酯单膜;所述涂覆对氯苯酚的量为3mL/cm2,所述喷涂液膜的量为0.01mL/cm2。
步骤3,将苯基三氯硅烷加入至1L苯中,低温超声形成溶解液,然后将溶解液均匀喷雾在聚酯单膜中不含水的表面液膜上,静置15min得到带混合液膜的聚酯单膜;所述苯基三氯硅烷在苯中的浓度为15g/L,低温超声的温度为4℃,超声频率为90kHz,所述均匀喷雾的喷雾量为0.7mL/cm2,静置温度为40℃;
步骤4,将数片聚酯单膜叠合,且相邻的聚酯单膜间水膜与混合液膜对应叠合,然后恒温挤压形成聚酯复合膜;所述恒温挤压的温度为110℃,挤压压力为1.3MPa。
本实施例制备的聚酯复合膜的耐电压为70kV,耐温为230℃,承压为1.0MPa。
综上所述,本发明具有以下优点:
1.本发明解决了聚酯复合膜稳定差,使用寿命短的问题,利用苯基硅树脂作为粘结剂,不仅利用硅树脂本身的绝缘性,有效的提升了复合膜的整体绝缘性,保证局部绝缘性依然保持稳定,而且采用微溶交错结构形成强力粘合。
2.本发明采用苯基三氯硅烷在苯中的溶解性,以及对氯苯酚与苯的溶解体系,实现了苯基三氯硅烷的内外渗透效果,形成苯基硅树脂的粘结和聚酯的相邻同质结合,提升复合膜的粘结稳定性。
可以理解的是,以上关于本发明的具体描述,仅用于说明本发明而并非受限于本发明实施例所描述的技术方案。本领域的普通技术人员应当理解,仍然可以对本发明进行修改或等同替换,以达到相同的技术效果;只要满足使用需要,都在本发明的保护范围之内。
Claims (1)
1.一种高耐压绝缘聚酯复合膜的制备方法,其特征在于:包括如下步骤:
步骤1,将聚对苯二甲酸乙二醇酯单膜加入至乙醇水溶液中微波反应10-20min,然后放入反应釜中热氮气烘干,得到洁净的聚酯单膜;
步骤2,将聚酯单膜表面涂覆对氯苯酚,形成表面液膜,且其中一个表面喷涂水膜,得到带液膜的聚酯单膜;
步骤3,将苯基三氯硅烷加入至苯中,低温超声形成溶解液,然后将溶解液均匀喷雾在聚酯单膜中不含水的表面液膜上,静置10-20min得到带混合液膜的聚酯单膜;
步骤4,将数片聚酯单膜叠合,且相邻的聚酯单膜间水膜与混合液膜对应叠合,然后恒温挤压形成聚酯复合膜;
所述步骤1中的乙醇水溶液的乙醇体积含量为60-80%,微波反应的温度为40-50℃,微波功率为200-400W;
所述步骤1中的热氮气烘干的温度为100-130℃;
所述步骤2中的涂覆对氯苯酚的量为1-3mL/cm2,所述喷涂液膜的量为0.01-0.02mL/cm2;
所述步骤3中的苯基三氯硅烷在苯中的浓度为10-20g/L,低温超声的温度为2-8℃,超声频率为80-100kHz;
所述步骤3中的均匀喷雾的喷雾量为0.5-0.9mL/cm2,静置温度为30-50℃;
所述步骤4中的恒温挤压的温度为100-120℃,挤压压力为1.2-1.5MPa。
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