CN105507061A - 一种超疏水涂层及其制备方法 - Google Patents
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Abstract
本发明属于材料表面及无机多孔材料领域,具体涉及一种超疏水涂层及其制备方法,包括以下步骤:a.将1-5重量份的天然沸石加入到50-100重量份的乙醇中,超声分散10-30min,再加入0.15-0.85重量份的全氟癸基三氯硅烷,继续超声分散10-30min得分散液;b.将基材浸入步骤a中的所述分散液中3-5min后取出并在50-70℃温度下干燥30min以上;c.重复步骤b两到三次在基材表面形成超疏水涂层。本发明天然沸石属于无机多孔材料,在涂层中能容易形成微纳结构,同时沸石表面存在很多羟基,全氟癸基三氯硅烷与其缩合后降低其表面能,从而达到超疏水效果;天然沸石廉价易得;制备方法简单并且易于工业化;该涂层具有自洁能力且能适用多种基材,用途广范。
Description
技术领域
本发明属于材料表面及无机多孔材料领域,具体涉及一种超疏水涂层及其制备方法。
背景技术
超疏水表面是指与水的静态接触角大于150°,并且滚动角小于10°的表面。这样的表面在自然界广泛存在,如荷叶,蝴蝶的翅膀,苍蝇的复眼,水黾的腿等等。在超疏水表面上,水滴呈球形,并且随着表面倾斜,水滴可以轻松的滚动,带走表面的灰尘,所以超疏水表面具有自清洁功能。由于水不能在上面铺张开,所以还具有防霜冻,防雾,防雪,防腐蚀,防粘附等的功能,因此在建筑涂料,织物整理,交通运输,电力系统等领域有广泛的应用前景。
超疏水表面的构造需要两个条件,一是要有粗糙结构(微米和纳米结构),荷叶表面不仅存在有微米级(10μm左右)的突起,而且在这些突起上还存在纳米级(100nm左右)的结构:二是要有低表面能物质,低表面能物质如含氟、含硅的物质具有优良的疏水效果。无机纳米材料由于其尺寸介于1到100nm之间,所以与有机材料复合以后可以比较容易的构造出微纳米结构,加入含氟类物质就可能使其达到超疏水的效果。
现在很多超疏水材料的制备步骤比较繁琐或者制备条件非常苛刻。超疏水表面的制备方法中常见的有溶胶凝胶法、刻蚀法、化学气相沉积法、静电纺丝法等等,其中溶胶凝胶法需要先制备出纳米粒子,再对其进行改性,化学气相沉积也是分为制备粗糙结构和疏水改性等多个步骤;刻蚀法则分为等离子刻蚀、光刻蚀和酸刻蚀等等,静电纺丝需要纺丝,再编制成网,它们都需要相应的设备,以及严格控制实验条件,才能达到超疏水的效果。
发明内容
为了模仿自然界的超疏水现象,简单的制备出超疏水涂层,并有效用于基材表面,本发明提供了一种制备超疏水涂层的方法,并用该方法在基材表面形成了超疏水涂层。
本发明提供一种超疏水涂层,其由制备方法包括如下步骤:
a.将1-5重量份的天然沸石加入到50-100重量份的乙醇中,超声分散10-30min,再加入0.15-0.85重量份的全氟癸基三氯硅烷,继续超声分散10-30min得分散液;
b.将基材浸入步骤a中的所述分散液中3-5min后取出并在50-70℃温度下干燥30min以上;
c.重复步骤b两到三次在基材表面形成超疏水涂层。
进一步,步骤a中的所述沸石为斜发沸石、丝光沸石、钙沸石和菱沸石中的任一种或多种的混合物。
进一步,步骤a中超声分散的超声频率为10-40KHz,超声功率为40-100W。
进一步,所述超疏水涂层的厚度为50-100μm。
进一步,所述基材为纸、钢材或陶瓷中的任一种。
相比于现有技术,本发明的积极效果为:本发明天然沸石属于无机多孔材料,在涂层中能容易形成微纳结构,同时沸石表面存在很多羟基,全氟癸基三氯硅烷与其缩合后降低其表面能,从而达到超疏水效果;天然沸石属于无机多孔材料,廉价易得;制备方法简单并且易于工业化,方便得到具有超疏水涂层的产品;该涂层具有自洁能力且能适用多种基材,用途广范。
附图说明
图1为本发明实施例1所制备的超疏水涂层的扫描电镜图;
图2为本发明实施例1所制备的超疏水涂层的接触角图。
具体实施方式
以下结合附图对本发明的原理和特征进行描述,所举实例只用于解释本发明,并非用于限定本发明的范围。
本发明中所使用的方法,如无特殊规定,均为常规方法,本发明所使用的试剂,如无特殊规定,均为市售产品。
实施例1
称取2g天然斜发沸石加入到50g乙醇中,超声分散30min,再加入0.17g全氟癸基三氯硅烷,继续超声10min得分散液,将实验室用常规圆形滤纸在所述分散液中浸3min后取出并在60℃下干燥30min,将干燥后的滤纸再次浸入所述分散液中,3min后取出并再次干燥30min,所述滤纸表面形成超疏水涂层。所述超声分散时的条件为,超声频率为40KHz,超声功率为100W。图1至图2分别为所述滤纸表面超疏水涂层的扫描电镜图、接触角图,从图中可见疏水涂层有较好的微纳结构和良好的疏水性能。
实施例2
称取5g天然丝光沸石加入到100g乙醇中,超声分散60min,再加入0.85g全氟癸基三氯硅烷,继续超声30min得分散液,将实验室用常规圆形滤纸在所述分散液中浸5min后取出并在70℃下干燥30min,将干燥后的滤纸再次浸入所述分散液中,5min后取出并再次干燥30min,再次将干燥后的滤纸浸入所述分散液中,3min后取出并最后干燥45min,所述滤纸表面形成超疏水涂层。所述超声分散时的条件为,超声频率为20KHz,超声功率为60W。
实施例3
称取3g天然钙沸石加入到60g乙醇中,超声分散45min,再加入0.45g全氟癸基三氯硅烷,继续超声45min得分散液,将实验室用常规圆形滤纸在所述分散液中浸4min后取出并在65℃下干燥45min,将干燥后的滤纸再次浸入所述分散液中,4min后取出并再次干燥45min,所述滤纸表面形成超疏水涂层。所述超声分散时的条件为,超声频率为20KHz,超声功率为60W。
实施例4
称取3g天然斜发沸石加入到60g乙醇中,超声分散45min,再加入0.45g全氟癸基三氯硅烷,继续超声45min得分散液,将表面经打磨清洗处理的钢板试块在所述分散液中浸4min后取出并在65℃下干燥45min,将干燥后的钢板试块再次浸入所述分散液中,4min后取出并再次干燥45min,所述钢板试块表面形成超疏水涂层。所述超声分散时的条件为,超声频率为20KHz,超声功率为60W。
实施例5
称取3g天然丝光沸石加入到100g乙醇中,超声分散60min,再加入0.65g全氟癸基三氯硅烷,继续超声30min得分散液,将表面经打磨清洗处理的钢板试块在所述分散液中浸5min后取出并在70℃下干燥30min,将干燥后的钢板试块再次浸入所述分散液中,5min后取出并再次干燥30min,再次将干燥后的钢板试块浸入所述分散液中,5min后取出并最后干燥30min,所述钢板试块表面形成超疏水涂层。所述超声分散时的条件为,超声频率为30KHz,超声功率为80W。
使用接触角仪器(JC2000A,上海中晨设备有限公司)测试实施例1至5中制得的超疏水涂层上水珠的接触角,测试结果如下:
样品 | 实施例1 | 实施例2 | 实施例3 | 实施例4 | 实施例5 |
接触角(度) | 152 | 155 | 154 | 160 | 161 |
从上述接触角数据可知,本发明提供的方法在纸及钢材类基材表面形成的超疏水涂层具有良好的疏水性能。
以上所述仅为本发明的较佳实施例,并不用以限制本发明,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (6)
1.一种超疏水涂层的制备方法,其特征在于,包括如下步骤:
a.将1-5重量份的天然沸石加入到50-100重量份的乙醇中,超声分散10-30min,再加入0.15-0.85重量份的全氟癸基三氯硅烷,继续超声分散10-30min得分散液;
b.将基材浸入步骤a中的所述分散液中3-5min后取出并在50-70℃温度下干燥30min以上;
c.重复步骤b两到三次在基材表面形成超疏水涂层。
2.根据权利要求1所述的一种超疏水涂层的制备方法,其特征在于,步骤a中的所述天然沸石为斜发沸石、丝光沸石、钙沸石和菱沸石中的任一种或多种的混合物。
3.根据权利要求1所述的一种超疏水涂层的制备方法,其特征在于,步骤a中超声分散的超声频率为10-40KHz,超声功率为40-100W。
4.根据权利要求1所述的一种超疏水涂层的制备方法,其特征在于,所述超疏水涂层的厚度为50-100μm。
5.根据权利要求1至4任一项所述的一种超疏水涂层的制备方法,其特征在于,所述基材为纸、钢材或陶瓷中的任一种。
6.一种超疏水涂层,其特征在于,由权利要求1至5任一项所述的制备方法制得。
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CN109440443A (zh) * | 2018-09-06 | 2019-03-08 | 中山大学 | 一种超疏水布料的制备方法 |
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