CN113717779B - 一种新型电流变液的制备方法 - Google Patents

一种新型电流变液的制备方法 Download PDF

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CN113717779B
CN113717779B CN202110901180.0A CN202110901180A CN113717779B CN 113717779 B CN113717779 B CN 113717779B CN 202110901180 A CN202110901180 A CN 202110901180A CN 113717779 B CN113717779 B CN 113717779B
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electrorheological fluid
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copper phthalocyanine
insulating base
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袁建波
汪元元
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Hangzhou Saiju Technology Co ltd
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Abstract

本发明提供一种新型电流变液的制备方法，其特征在于，电流变液包括如下成分：绝缘基液和悬浮于绝缘基液中的聚偏二氟乙烯‑三氟乙烯共聚物(P(VDF‑TrFE))包覆的酞菁铜。本发明采用铁电共聚物P(VDF‑TrFE)包覆具有大共轭结构的酞菁铜并辐照交联作为电流变液的分散相，分散相密度低，分散性好、不沉性好，剪切强度高，在电场作用下粘度急剧增大由液态变为固态。

Description

一种新型电流变液的制备方法
技术领域
本发明属于新材料技术领域，特别是涉及一种新型电流变液的制备方法。
背景技术
电流变液体作为智能材料的一种重要基本材料组元，通常分为粒子分散系和均匀系两大类型。粒子分散系是指由高相对介电常数低电导率的微米级颗粒弥散在低相对介电常数的绝缘油中形成的悬浮液。其特点是由于施加电场，分散粒子形成链状结构，对ER液体的流动形式形成很大的抵抗，因而ER液体的表观粘度、剪切强度可发生连续升高。有机物和高聚物做成的电流变液具有沉降性能较好，对设备磨损小，剪切应力较高的优点，是非常有潜力的电流变液体系。
发明内容
本发明的目的在于提供一种新型电流变液的制备方法，其特征在于，电流变液包括如下成分：绝缘基液和悬浮于绝缘基液中的聚偏二氟乙烯-三氟乙烯共聚物(P(VDF-TrFE))包覆的酞菁铜；
制备方法包括如下步骤：
(1)在溶解有0.02～0.06g/mL P(VDF-TrFE)的二甲基乙酰胺中加入0.005～0.01g/mL酞菁铜粉，搅拌升温至75～90℃，逐滴滴加0.01～0.03g/mL的聚乙烯醇水溶液，直到聚乙烯醇质量当量与P(VDF-TrFE)相同，溶液中出现沉淀，将沉淀过滤，多次水系去除多余的聚乙烯醇，得到P(VDF-TrFE)包覆的酞菁铜；
(2)将P(VDF-TrFE)包覆的酞菁铜放入50-160kGy电子束辐照交联；
(3)30～60质量份辐照后的PVDF包覆的酞菁铜加入100质量份绝缘基液中，将混合液放入行星式球磨机中分散研磨6～10小时，得到电流变液。
所述绝缘基液成分为50-65％三氟丙基甲基环三硅氧烷、0-20％甲基含氢硅油、20-30％氯化石蜡、5-25％羟基硅油。
本发明采用铁电共聚物P(VDF-TrFE)包覆具有大共轭结构的酞菁铜并辐照交联作为电流变液的分散相，分散相密度低，分散性好、剪切强度高，在电场作用下粘度急剧增大由液态变为固态。相较于传统的无机物分散体，本发明体系具有更优的分散性和不沉性，已经长期使用的稳定性。
具体实施方式
实施例1：
(1)在溶解有0.02g/mL P(VDF-TrFE)的二甲基乙酰胺中加入0.005g/mL酞菁铜粉，搅拌升温至75℃，逐滴滴加0.01g/mL的聚乙烯醇水溶液，直到聚乙烯醇质量当量与P(VDF-TrFE)相同，溶液中出现沉淀，将沉淀过滤，多次水系去除多余的聚乙烯醇，得到P(VDF-TrFE)包覆的酞菁铜；
(2)将P(VDF-TrFE)包覆的酞菁铜放入50kGy电子束辐照交联；
(3)配制成分为50％三氟丙基甲基环三硅氧烷、5％甲基含氢硅油、20％氯化石蜡、25％羟基硅油的绝缘基液
(4)30质量份辐照后的PVDF包覆的酞菁铜加入100质量份绝缘基液中，将混合液放入行星式球磨机中分散研磨6小时，得到电流变液。电流变液具有良好不沉性，常温密封30天无明显沉降。3kV下剪切强度33KPa。
实施例2：
(1)在溶解有0.06g/mL P(VDF-TrFE)的二甲基乙酰胺中加入0.01g/mL酞菁铜粉，搅拌升温至90℃，逐滴滴加0.03g/mL的聚乙烯醇水溶液，直到聚乙烯醇质量当量与P(VDF-TrFE)相同，溶液中出现沉淀，将沉淀过滤，多次水系去除多余的聚乙烯醇，得到P(VDF-TrFE)包覆的酞菁铜；
(2)将P(VDF-TrFE)包覆的酞菁铜放入160kGy电子束辐照交联；
(3)配制成分为65％三氟丙基甲基环三硅氧烷、30％氯化石蜡、5％羟基硅油的绝缘基液
(4)60质量份辐照后的PVDF包覆的酞菁铜加入100质量份绝缘基液中，将混合液放入行星式球磨机中分散研磨8小时，得到电流变液。电流变液具有良好不沉性，常温密封30天无明显沉降。3kV下剪切强度52KPa。
实施例3：
(1)在溶解有0.04g/mL P(VDF-TrFE)的二甲基乙酰胺中加入0.008g/mL酞菁铜粉，搅拌升温至80℃，逐滴滴加0.02g/mL的聚乙烯醇水溶液，直到聚乙烯醇质量当量与P(VDF-TrFE)相同，溶液中出现沉淀，将沉淀过滤，多次水系去除多余的聚乙烯醇，得到P(VDF-TrFE)包覆的酞菁铜；
(2)将P(VDF-TrFE)包覆的酞菁铜放入100kGy电子束辐照交联；
(3)配制成分为50％三氟丙基甲基环三硅氧烷、5％甲基含氢硅油、20％氯化石蜡、25％羟基硅油的绝缘基液
(4)50质量份辐照后的PVDF包覆的酞菁铜加入100质量份绝缘基液中，将混合液放入行星式球磨机中分散研磨10小时，得到电流变液。电流变液具有良好不沉性，常温密封30天无明显沉降。3kV下剪切强度46KPa。
上述实施例仅例示性说明本发明的原理及其功效，而非用于限制本发明。任何熟悉此技术的人士皆可在不违背本发明的精神及范畴下，对上述实施例进行修饰或改变。因此，举凡所属技术领域中具有通常知识者在未脱离本发明所揭示的精神与技术思想下所完成的一切等效修饰或改变，仍应由本发明的权利要求所涵盖。

Claims (3)

1.一种新型电流变液的制备方法，其特征在于，电流变液包括如下成分：绝缘基液和悬浮于绝缘基液中的聚偏二氟乙烯-三氟乙烯共聚物(P(VDF-TrFE))包覆的酞菁铜；制备方法包括如下步骤：
(1)在溶解有0.02～0.06g/mL P(VDF-TrFE)的二甲基乙酰胺中加入0.005～0.01g/mL酞菁铜粉，搅拌升温至75～90℃，逐滴滴加0.01～0.03g/mL的聚乙烯醇水溶液，直到聚乙烯醇质量当量与P(VDF-TrFE)相同，溶液中出现沉淀，将沉淀过滤，多次水系去除多余的聚乙烯醇，得到P(VDF-TrFE)包覆的酞菁铜；
(2)将P(VDF-TrFE)包覆的酞菁铜放入50-160kGy电子束辐照交联；
(3)30～60质量份辐照后的PVDF包覆的酞菁铜加入100质量份绝缘基液中，将混合液放入行星式球磨机中分散研磨6～10小时，得到电流变液。
2.根据权利要求1所述一种新型电流变液的制备方法，其特征在于：所述绝缘基液成分为50-65％三氟丙基甲基环三硅氧烷、0-20％甲基含氢硅油、20-30％氯化石蜡、5-25％羟基硅油。
3.一种如权利要求1～2任意一项所述的新型电流变液的制备方法所制备电流变液，在电场作用下粘度急剧增大可由液态变为固态。
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EP0549227A1 (en) * 1991-12-17 1993-06-30 Mitsubishi Chemical Corporation Electroviscous fluid
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