CN100577782C - 表面改性的电流变液电极板 - Google Patents
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M171/00—Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated
- C10M171/001—Electrorheological fluids; smart fluids
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
本发明涉及一种表面改性的电流变液电极板,在金属电极板的表面添加粗糙、耐磨、电导率低的改性层,表面改性层材料选自金刚石、氧化铝、氧化钛、碳化硅、氮化钛、尼龙、聚四氟乙烯、粘结剂、胶膜中的至少一种。通过添加改性层,提高电流变液与极板附着力,使极板处电流变液剪切强度接近其本身剪切强度真实值,从而使电流变液能有效实际应用。同时可使电流变液器件漏电流减小,击穿电压提高。
Description
技术领域
本发明涉及一种表面改性的电流变液电极板,特别涉及一种适用于极性分子型电流变液的表面改性的电流变液电极板。
背景技术
电流变液(Electrorheological Fluids,简称ERF)是一种新型的智能功能材料,是由介电颗粒与绝缘液体混合而成的复杂流体。在没有外电场作用下,电流变液呈液体状态,当外加电场作用于电流变液时,电流变液的剪切强度随电场的增加而变大。当电场足够大时,电流变液转变成类似固体物质。且这种剪切强度转变是可逆的,响应时间为毫秒量级。由于其独一无二的的软硬可调的特性,使其在工业、军事等领域有非常广泛的应用前景。
在进行电流变液的性能测试还是实际应用中,通常均采用金属极板作为正、负电极。由于传统的电流变液基于颗粒间极化相互作用,且剪切强度较低,一般不超过10kPa,金属极板处基本达到电流变液相互作用的条件,金属极板能满足对电流变液材料的流变性能的测量和实际应用。
对于极性分子型电流变液,其屈服强度达数百kPa或更高,比传统电流变液的高几十倍以上,动态剪切强度也大大提高。通常金属电极板表面处不满足极性分子取向和作用条件,电流变液与电极板表面之间会发生“打滑”。因此使用普通金属电极板,得到的电流变液剪切强度比实际值低得多,将严重影响电流变液材料的实际应用。尽管使用表面粗糙的金属电极板也可减轻“打滑”,使测量得到的电流变液剪切强度增大约一倍,但容易产生金属极板粗糙表面的放电,不利于施加高电场。
发明内容
本发明所要解决的技术问题是提供一种克服电流变液与电极板表面之间的“打滑”,使极板处电流变液剪切强度接近其本身剪切强度真实值,同时可使漏电流明显减小的表面改性的电流变液电极板。
本发明的表面改性的电流变液电极板,在金属电极板的表面添加粗糙、耐磨、电导率低的改性层,增大电流变液与极板附着力。
所述的表面改性层材料电极板表面处理的改性层材料可为无机、有机、金属、或其混合材料,选自:金刚石、氧化铝、氧化钛、碳化硅、氮化钛、尼龙、聚四氟乙烯、粘结剂、胶膜中的至少一种。
本发明的表面改性的电流变液电极板,在金属电极板的表面通过机械加工、喷镀、化学沉积、粘接、镀膜、烧结或渗透的方法添加改性层。
本发明的表面改性的电流变液电极板,改性层的形态为规则或不规则的颗粒状、条纹状、网格状。改性层的厚度为1μm~1mm,改性层材料在金属电极表面的面积占10%~100%,颗粒尺度范围为100nm~0.5mm,条纹或网格的间距为0.1~3mm。
本发明所述的表面改性的电流变液电极板,通过添加改性层,提高电流变液与极板附着力,使极板处电流变液剪切强度接近其本身剪切强度真实值,从而使电流变液能有效实际应用。同时可使电流变液器件漏电流减小,击穿电压提高。用改进的电流变液电极板,可作为电流变液应用时的正、负电极,应用于工程电流变液器件。
附图说明
图1是用铜表面粘接二氧化钛粉末的电极和表面粗糙铜电极测量的电流变液性能比较,电极经表面处理与未经表面处理相比,可使电流变液的屈服强度提高一倍(图1a),而电流密度基本上无变化(图1b);
图2是用金属表面喷涂三氧化二铝颗粒电极与光滑金属片电极测量的电流变液性能的比较,电极经表面处理与未经表面处理相比,可使电流变液的屈服强度提高四倍(图2a),电流密度降低约五倍(图2b);
图3是用不锈钢表面镀金刚石颗粒电极与光滑金属片电极测量的电流变液性能的比较,电极经表面处理与未经表面处理相比,可使电流变液的屈服强度提高四倍(图3a),电流密度降低约五倍(图3b);
图4是用表面粘贴网格电极与粗糙金属片电极测量的电流变液性能的比较,电极经表面处理与未经表面处理相比,可使电流变液的屈服强度提高一倍(图4a),电流密度降低约一半(图4b);
图5是TiO2电流变液的动态剪切强度实验结果图。
具体实施方式
实施例1
如图1所示,用化学粘接法进行极板表面改性处理:将颗粒尺度约为100nm的固体二氧化钛颗粒用环氧树脂粘接在铜片表面,在金属电极表面的面积占90%,厚度约为10μm,以此作为平板粘度计的正负电极,测量二氧化钛电流变液(包含极性分子)的屈服强度,得到的屈服强度比用粗糙表面的金属铜作正负电极的测量值增高一倍以上,电流密度基本上无变化。
实施例2
如图2所示,用表面喷涂法进行极板表面改性处理:将固体三氧化二铝颗粒用等离子喷镀法在铝片表面,三氧化二铝颗粒尺度约5μm,改性层厚度约为10μm,在金属电极表面的面积占100%。以此作为平板粘度计的正负电极,测量Ca-Ti-O电流变液(包含极性分子)的屈服强度,比用光滑金属片作正负电极的测量屈服强度增大近四倍,电流密度降低约五倍。
实施例3
如图3所示,用化学和物理法极板表面改性处理:将颗粒尺度为15μm的固体金刚石颗粒用金属镍粘接在不锈钢片表面,厚度约为20μm,金刚石颗粒在金属电极表面的面积占70%。以此作为平板粘度计的正负电极,测量Ca-Ti-O电流变液(包含极性分子)的屈服强度,比用光滑金属铝片作正负电极的测量屈服强度增大近四倍,电流密度降低约三倍。
实施例4
如图4所示,用表面粘贴网格进行极板表面改性处理:将尼龙网格粘贴在铜极板表面,网格厚度为0.4mm,网格线宽0.2mm,网格间距为2mm。尼龙占金属电极表面的面积约20%。以此作为平板粘度计的正负电极,测量Ca-Ti-O电流变液(包含极性分子)的屈服强度,比用表面粗糙金属铜片作正负电极的测量屈服强度增大近一倍,电流密度降低约50%。
实施例5
用密封转筒法测量电流变液动态剪切强度时,将固体金刚石颗粒(尺寸约15μm)粘结在内外转筒表面,厚度约为20μm,在金属表面的面积占60%。测量TiO2电流变液(包含极性分子)的动态剪切强度,可解决电流变液与极板打滑问题,测量得很高的动态剪切强度,如图5所示。在3kV/mm场强时剪切强度达到70kPa,用未添加改性层的电极板是不可能测量得到的。
Claims (4)
1、表面改性的电流变液电极板,其特征是,在金属电极板的表面添加粗糙、耐磨、电导率低的表面改性层,所述的表面改性层材料选自:金刚石、氧化铝、氧化钛、碳化硅、氮化钛、尼龙、聚四氟乙烯中的至少一种;表面改性层的厚度为1μm~1mm,改性层材料在金属电极板表面的面积占10%~100%。
2、根据权利要求1所述的表面改性的电流变液电极板,其特征在于所述表面改性层的添加方法为,在金属电极板的表面通过机械加工、喷镀、粘接、化学沉积、镀膜、烧结或渗透的方法添加改性层。
3、根据权利要求1所述的表面改性的电流变液电极板,其特征在于,表面改性层的形态为规则或不规则的颗粒状、条纹状、网格状。
4、根据权利要求3所述的表面改性的电流变液电极板,其特征在于,颗粒尺度范围为100nm~0.5mm,条纹或网格的间距为0.1~3mm。
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CN200610012256A CN100577782C (zh) | 2006-06-15 | 2006-06-15 | 表面改性的电流变液电极板 |
EP07721464A EP2039744A4 (en) | 2006-06-15 | 2007-06-15 | MODIFIED SURFACE ELECTRODE PLATE FOR ELECTRORHEOLOGICAL FLUID |
US12/304,999 US8349154B2 (en) | 2006-06-15 | 2007-06-15 | Surface modified electrodes for ER fluids |
PCT/CN2007/001891 WO2007147348A1 (fr) | 2006-06-15 | 2007-06-15 | Plaque d'électrode à surface modifiée pour fluide électrorhéologique |
JP2009514622A JP2009540237A (ja) | 2006-06-15 | 2007-06-15 | 表面を改質した電気粘性流体用電極板 |
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CN102817955B (zh) * | 2012-06-07 | 2014-09-03 | 北方材料科学与工程研究院有限公司 | 巨电流变体阻尼器极板的修饰处理方法 |
US9820531B2 (en) | 2015-05-29 | 2017-11-21 | Nike, Inc. | Footwear including an incline adjuster |
US10932523B2 (en) | 2015-11-30 | 2021-03-02 | Nike, Inc. | Electrorheological fluid structure with attached conductor and method of fabrication |
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KR102330563B1 (ko) | 2017-10-13 | 2021-12-01 | 나이키 이노베이트 씨.브이. | 전기유변 유체 하우징을 갖춘 풋웨어 중창 |
CN107987916B (zh) * | 2017-11-28 | 2020-12-15 | 青岛大学 | 一种具有剪切变稀的电磁流变性能材料的制备方法 |
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CN111822727B (zh) * | 2020-06-28 | 2023-11-03 | 合肥百诺金科技股份有限公司 | 粗糙电极表面结构的液相放电合成金属纳米颗粒的方法 |
CN111823763B (zh) * | 2020-07-22 | 2022-05-17 | 山东鑫琦文化旅游股份有限公司 | 一种柔性材料用手动烫画机的恒压稳定烫画方法 |
CN112936483A (zh) * | 2021-03-10 | 2021-06-11 | 福建省顺昌县升升木业有限公司 | 杉木原材料强度加强工艺 |
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WO2007147348A1 (fr) | 2007-12-27 |
EP2039744A4 (en) | 2012-02-08 |
US8349154B2 (en) | 2013-01-08 |
EP2039744A1 (en) | 2009-03-25 |
US20090136394A1 (en) | 2009-05-28 |
JP2009540237A (ja) | 2009-11-19 |
CN101089165A (zh) | 2007-12-19 |
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