CN105369671A - 一种变压器用特高压复合绝缘纸的制备 - Google Patents
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Abstract
本发明公开了一种变压器用特高压复合绝缘纸的制备,由以下重量份的原料制备制成:纳米二氧化钛12-15、酚醛树脂2-3、浆板500-550、硅酸钠1.3-1.5、羧甲基纤维素钠1-1.3、氧化石墨2-3、聚醚1.2-1.5、三盐基硫酸铅0.2-0.3、水性聚氨酯1.6-2、黄麻纤维2.4-2.6、透明质酸0.7-0.9、铁粉芯1.1-1.4、去离子水适量;本发明的制备工艺简单可控,产品尺寸稳定性好,抗撕裂性能好,值得推广。
Description
技术领域
本发明涉及变压器技术领域,尤其涉及一种变压器用特高压复合绝缘纸的制备。
背景技术
绝缘纸广泛用作电机、电缆、电容器和变压器等设备的绝缘材料,也是层压制品、复合材料和预浸材料等绝缘材料的主要组成材料。由于绝缘纸的特殊用途,要求其必须具备一些不同于其它纸种的特性,主要包括机械性能、电气性能和热稳定性。而且由于各类电气设备使用环境的不同,如湿热条件下运行的电机、化工厂经常接触高浓度的腐蚀性化学介质的电机、在有放射性辐射下运行的电机等,要求绝缘纸还要有较好的物理化学性能和环境适应性。采用天然纤维素制备的绝缘纸从19世纪90年代开始就被广泛应用于各种油浸式的电力设备中作为绝缘材料,虽然现在的绝缘材料有了较大的变化和进步,但纤维素绝缘纸具有价格低、机械强度大、尺寸容易控制、浸油后电气性能优良、环境友好等诸多优点,仍然是油浸变压器的首选绝缘材料,在传统的造纸行业当中为了提高纸张的各种性能,利用多种物理化学方法对纸进行改性。利用无机填料来改性绝缘纸可以得到性能更加优异的绝缘纸,但是目前国内外对于这方面的研究很少。
纳米二氧化钛具有很大的比表面积,因此在其表面产生的羟基数量就多而纤维素表面也带有大量的羟基,就为纳米二氧化钛粒子与纤维素之间的紧密结合提供了条件,保证纳米二氧化钛在纤维素上的附着率,并且纳米二氧化钛还能对绝缘油的绝缘性能起到较好的作用。所以本发明选择纳米二氧化钛对绝缘纸进行改性。
发明内容
本发明目的就是为了弥补已有技术的缺陷,提供一种变压器用特高压复合绝缘纸的制备。
本发明是通过以下技术方案实现的:
一种变压器用特高压复合绝缘纸的制备,由以下重量份的原料制备制成:纳米二氧化钛12-15、酚醛树脂2-3、浆板500-550、硅酸钠1.3-1.5、氧化石墨2-3、聚醚1.2-1.5、三盐基硫酸铅0.2-0.3、水性聚氨酯1.6-2、黄麻纤维2.4-2.6、透明质酸0.7-0.9、铁粉芯1.1-1.4、去离子水适量。
所述一种变压器用特高压复合绝缘纸的制备,由以下具体步骤制备制成:
(1)将纳米二氧化钛在烘箱中于100°C下干燥30min,冷却后加到0.5Wt%硅烷偶联剂kh550无水乙醇溶液中,再加入氧化石墨进行回流冷凝处理,取出后烘干碾磨待用;
(2)将固含量为15-20%的酚醛树脂和步骤(1)制备的产物混合均匀,再加热至80°C时搅拌反应0.5-1h,恒温保持再加入黄麻纤维浸泡4-5h,捞出后用蒸馏水清洗纤维条数遍后烘干备用;
(3)将浆板在去离子水中浸泡12h,浸泡充分后疏解6-8min后利用打浆机进行打浆,待浆料的打浆度到40-45°SR时停止打浆,将制备的浆料放入纤维解离器中,加入去离子水使浆料的浓度在2-2.5%内进行机械处理,得到纸浆悬浊液备用;
(4)将铁粉芯、水性聚氨酯、透明质酸、三盐基硫酸铅、聚醚和硅酸钠混合加入总倍量6-8倍量的去离子水混合搅拌均匀,将步骤(2)制备的产物加到步骤(3)制备的纸浆悬浊液中,再加入上述混合溶液以300转/分下进行搅拌,最后将纸浆悬浮液加到纸业成型设备中进行脱水成型,即可得到。
本发明的优点是:本发明采用将二氧化钛表面改性,不易聚集,使其在纸浆中分布均匀,且能大幅度提高绝缘纸的绝缘性能,并且还将纤维浸渍到绝缘树脂中,固化梳理然后利用粘胶溶液和纤维素纤维混合纺织,制备的复合纸大大提高了其机械性能、绝缘性、耐热老化性和强度等方面的作用,添加的黄麻纤维能够降低生产成本,且不影响原有绝缘纸的阻燃、绝缘性能,添加的氧化石墨、铁粉芯、聚醚和水性聚氨酯等配合使用大大的提高了绝缘纸的耐高压、抗氧化、耐腐蚀、高温稳定性好等作用,本发明的制备工艺简单可控,产品尺寸稳定性好,抗撕裂性能好,值得推广。
具体实施方式
一种变压器用特高压复合绝缘纸的制备,由以下重量份(公斤)的原料制备制成:纳米二氧化钛12、酚醛树脂2、浆板500、硅酸钠1.3、氧化石墨2、聚醚1.2、三盐基硫酸铅0.2、水性聚氨酯1.6、黄麻纤维2.4、透明质酸0.7、铁粉芯1.1、去离子水适量。
所述一种变压器用特高压复合绝缘纸的制备,由以下具体步骤制备制成:
(1)将纳米二氧化钛在烘箱中于100°C下干燥30min,冷却后加到0.5Wt%硅烷偶联剂kh550无水乙醇溶液中,再加入氧化石墨进行回流冷凝处理,取出后烘干碾磨待用;
(2)将固含量为15%的酚醛树脂和步骤(1)制备的产物混合均匀,再加热至80°C时搅拌反应0.5h,恒温保持再加入黄麻纤维浸泡4h,捞出后用蒸馏水清洗纤维条数遍后烘干备用;
(3)将浆板在去离子水中浸泡12h,浸泡充分后疏解6min后利用打浆机进行打浆,待浆料的打浆度到40°SR时停止打浆,将制备的浆料放入纤维解离器中,加入去离子水使浆料的浓度在2%内进行机械处理,得到纸浆悬浊液备用;
(4)将铁粉芯、水性聚氨酯、透明质酸、三盐基硫酸铅、聚醚和硅酸钠混合加入总倍量6倍量的去离子水混合搅拌均匀,将步骤(2)制备的产物加到步骤(3)制备的纸浆悬浊液中,再加入上述混合溶液以300转/分下进行搅拌,最后将纸浆悬浮液加到纸业成型设备中进行脱水成型,即可得到。
按照本实施例制备的绝缘纸其性能测试如下:击穿电压为3.9KV、介电强度为38KV/mm,绝缘纸的阻燃级别为V0级,纸白度≥80%,干抗拉强度为4.3KN/m,湿抗张强度为0.5KN/m,吸水高度55mm,透气度为20±4s,体积电阻率为1.3×106,表面电阻为4.8×104,介电常数为5.3,介电损耗因数为0.043。
Claims (2)
1.一种变压器用特高压复合绝缘纸的制备,其特征在于,由以下重量份的原料制备制成:纳米二氧化钛12-15、酚醛树脂2-3、浆板500-550、硅酸钠1.3-1.5、氧化石墨2-3、聚醚1.2-1.5、三盐基硫酸铅0.2-0.3、水性聚氨酯1.6-2、黄麻纤维2.4-2.6、透明质酸0.7-0.9、铁粉芯1.1-1.4、去离子水适量。
2.根据权利要求1所述一种变压器用特高压复合绝缘纸的制备,其特征在于,由以下具体步骤制备制成:
(1)将纳米二氧化钛在烘箱中于100°C下干燥30min,冷却后加到0.5Wt%硅烷偶联剂kh550无水乙醇溶液中,再加入氧化石墨进行回流冷凝处理,取出后烘干碾磨待用;
(2)将固含量为15-20%的酚醛树脂和步骤(1)制备的产物混合均匀,再加热至80°C时搅拌反应0.5-1h,恒温保持再加入黄麻纤维浸泡4-5h,捞出后用蒸馏水清洗纤维条数遍后烘干备用;
(3)将浆板在去离子水中浸泡12h,浸泡充分后疏解6-8min后利用打浆机进行打浆,待浆料的打浆度到40-45°SR时停止打浆,将制备的浆料放入纤维解离器中,加入去离子水使浆料的浓度在2-2.5%内进行机械处理,得到纸浆悬浊液备用;
(4)将铁粉芯、水性聚氨酯、透明质酸、三盐基硫酸铅、聚醚和硅酸钠混合加入总倍量6-8倍量的去离子水混合搅拌均匀,将步骤(2)制备的产物加到步骤(3)制备的纸浆悬浊液中,再加入上述混合溶液以300转/分下进行搅拌,最后将纸浆悬浮液加到纸业成型设备中进行脱水成型,即可得到。
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