CN115418858A - 一种抗油污的界面水净化织物及其制备方法和应用 - Google Patents
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Abstract
本发明公开了一种抗油污的界面水净化织物及其制备方法和应用。该方法利用浸涂法,先后在基底棉织物上沉积光热材料聚吡咯和仿生水下超疏油材料没食子酸/3‑氨丙基三乙氧基硅烷制备得到抗油污的光驱动水‑空气界面水净化织物。应用为:将抗油污的光驱动水‑空气界面水净化织物和聚苯乙烯泡沫以二维水通道的方式自上而下组装在一起,构成太阳能界面水蒸发器件。本发明的光热材料整个制备过程在室温水体系中进行,原料廉价易得、绿色环保,工艺简单且利于扩大化生产,在性能上同时实现了高效的光吸收和水下超疏油功能,可用于太阳能驱动的含油水体水质净化。
Description
技术领域
本发明涉及环境功能材料领域,具体涉及一种抗油污的光驱动水-空气界面水净化织物及其制备方法和应用。
背景技术
在碳达峰、碳中和背景下,太阳能界面水蒸发作为一种能量来源无污染的环境友好型水处理技术,在海水淡化和污水处理等领域具有广阔的应用前景。光热材料可以将太阳能转化成热能来加速水蒸发,从而实现水分子与污染物质的分离。设计性能优异的光热材料是实现有效太阳能水蒸发的关键。
实际应用的水体中可能含有油类物质,而油类物质可能会粘附在光热材料上,不利于水的输运,最终降低太阳能水蒸发器件的蒸发性能。现有技术中,以聚多巴胺为代表的抗油材料虽然表面修饰体系非常强大,但是存在多巴胺单体价格较高等缺陷。因此,需要继续探索其他替代方案,以得到一种具有制备工艺简单、制备条件温和以及易于扩大化生产等特点的光热材料,并且可以在含油水体中成功对抗油的污染,以实现太阳能驱动的含油水体水质净化。
发明内容
本发明提供了一种抗油污的界面水净化织物及其制备方法和应用。
本发明利用浸涂法,先后在基底棉织物上沉积了光热材料聚吡咯和仿生水下超疏油材料没食子酸/3-氨丙基三乙氧基硅烷制备得到抗油污界面水净化织物。其中,聚吡咯由吡咯单体被氯化铁氧化聚合制得;仿生水下超疏油材料则是受对各种表面具有突出粘附性能的贻贝足蛋白启发的,其原理为具有邻苯三酚成分的没食子酸在具有氨基的APTES的辅助下,主要可以发生迈克尔加成和席夫碱反应,形成仿贻贝粘附涂层。将抗油污界面水净化织物以二维水通道的方式镶嵌在聚乙烯泡沫隔热装置上构成太阳能界面水蒸发器件,可以将其应用于太阳能驱动的含油水体水质净化。
一、一种抗油污的光驱动水-空气界面水净化织物的制备方法,包括以下步骤:
(1)将吡咯水溶液(超声分散1~30min后)和氯化铁水溶液加入含有棉织物的培养皿中,5~40℃(优选20~30℃)下反应0.5~10h。反应后用乙醇和水交替洗涤1~10次,得到聚吡咯棉织物。
(2)将没食子酸溶解于三羟甲基氨基甲烷水溶液得到没食子酸水溶液,将APTES(氨丙基三乙氧基硅烷)溶解于乙醇溶剂,然后将这两份溶液在含有光热织物的培养皿中进行混合,5~40℃下反应1~24h。反应后用水洗涤聚吡咯棉织物1~10次,并在空气中晾干1~72h,得到抗油污的界面水净化织物。
本发明方法利用浸涂法,先后在基底棉织物上沉积光热材料聚吡咯和仿生水下超疏油材料没食子酸/3-氨丙基三乙氧基硅烷制备得到抗油污的光驱动水-空气界面水净化织物。应用为:将抗油污的光驱动水-空气界面水净化织物和聚苯乙烯泡沫以二维水通道的方式自上而下组装在一起,构成太阳能界面水蒸发器件。
步骤(1)中,吡咯水溶液超声分散1~30min后加入含有棉织物的容器中。
所述的吡咯水溶液中吡咯的体积分数为0.01~1.0%(进一步优选0.05~0.10%,);所述的氯化铁水溶液中氯化铁的浓度为0.01~2mol/L(进一步优选0.1~1mol/L),其中溶有0.05~0.6mol/L(进一步优选0.1~0.5mol/L)的HCl以抑制Fe3+水解;所述的吡咯水溶液和氯化铁水溶液的体积之比为0.1~2:1(进一步优选0.5~1.5:1)。
作为优选,反应时间为1~3h;用乙醇和水交替洗涤2~6次。
步骤(2)中,所述的三羟甲基氨基甲烷水溶液中三羟甲基氨基甲烷的浓度为0.01~1mol/L(进一步优选0.03~0.1mol/L),其中溶有一定量的HCl以控制溶液pH为7~10(进一步优选8~9);所述的没食子酸在该三羟甲基氨基甲烷水溶液的浓度为0.1~5g/L(进一步优选1~3g/L);所述的APTES乙醇溶液浓度为10~50g/L(进一步优选25~35g/L);所述的没食子酸水溶液和APTES乙醇溶液的体积比为1~10:1(进一步优选3~7:1)。
作为优选,反应时间为1~24h;用水洗涤织物2~6次;在空气中晾干8~24h。
二、基于抗油污的界面水净化织物的抗油型太阳能界面水蒸发器件的应用,即抗油污的界面水净化织物制备太阳能驱动的抗油型界面水蒸发器件中的应用。
将抗油污的界面水净化织物以二维水通道的方式镶嵌在聚乙烯泡沫隔热装置上,形成太阳能驱动的抗油型界面水蒸发器件。
对抗油型界面水蒸发器件进行性能测试。在蒸发实验中,室内温度维持在24~26℃,湿度为45%~65%。用太阳光模拟器(CEL-AAAS50,Aulight)提供1kW m-2的太阳光照,将抗油型界面水蒸发器件放置于装有水溶液的容器上,用电子天平记录重量变化,计算蒸发速率以衡量器件的蒸发性能。
对器件的抗油性能进行研究时,用注射器将大豆油注入烧杯中,用电子天平记录重量变化,计算蒸发速率以衡量器件在含油水体中的蒸发性能。
对器件的水净化效果进行研究时,将器件放入装有含油水体或模拟海水的烧杯中,在辐照下产生的蒸汽冷凝成液体并到达一个用于收集冷凝水的大烧杯内壁上,收集后的冷凝水用总有机碳分析仪测定TOC浓度、用ICP-MS测定离子含量。
与现有技术相比,本发明具有如下优点:
(1)通过首先在棉织物上浸涂聚吡咯制备光热织物,然后再浸涂水下超疏油材料没食子酸/3-氨丙基三乙氧基硅烷制备抗油污的光驱动水-空气界面水净化织物的方法,具有原料价格低廉、制备工艺简单、制备条件温和以及易于扩大化生产等特点。选用的没食子酸中的邻苯三酚的成分可以在碱性条件下进行共涂覆,得到类似的贻贝粘附启发的抗油涂层。
(2)在性能上同时实现了高效的光吸收和水下超疏油功能,可用于太阳能驱动的含油水体水质净化。
(3)基于抗油污界面水净化织物的界面水蒸发器件对含油废水中TOC和模拟海水中的金属离子成功净化。
(4)本发明的光热材料整个制备过程在室温水体系中进行,原料廉价易得、绿色环保,工艺简单且利于扩大化生产,在性能上同时实现了高效的光吸收和水下超疏油功能,可用于太阳能驱动的含油水体水质净化。
附图说明
图1为抗油污的光驱动水-空气界面水净化织物的实物图和SEM图。
图2为抗油污的光驱动水-空气界面水净化织物的紫外-可见-近红外吸收和光照下稳定状态的红外图。
图3为抗油污的光驱动水-空气界面水净化织物的水下油接触角。
图4为基于抗油污织物的抗油型太阳能界面水蒸发器件。
图5为器件在含油水体与不含油水体中的蒸发速率,结果显示器件性能在两种水体中接近,证实器件的抗油效果。
图6位器件对含油水体和模拟海水的净化效果。
具体实施方式
本发明通过以下实例结合附图作进一步详述。
(1)本发明的处理过程
一种抗油污的光驱动水-空气界面水净化织物,其制备方法为浸涂法,具体如下。首先将50mL吡咯水溶液(体积分数为0.08%,超声分散10min)和50mL氯化铁水溶液(0.5mol/L,其中溶有0.3mol/L的HCl以抑制Fe3+水解)加入含有棉织物的培养皿中,在室温25℃下反应2h。用乙醇和水交替洗涤4次,得到光热织物。之后将0.2g没食子酸溶解于100mL三羟甲基氨基甲烷水溶液(0.05mol/L,用HCl调节pH为8.5)得到没食子酸水溶液,将0.6gAPTES溶解于20mL乙醇溶剂,然后将这两份溶液在含有光热织物的培养皿中进行混合,室温反应6小时。用水洗涤棉织物4次,在空气中晾干18h,得到抗油污的光驱动水-空气界面水净化织物。图1显示了水下超疏油光热植物的光学照片以及棉纤维上的SEM图,后者展示的表面粗糙结构可以促进织物的超润湿性(水下超疏油)。
如图2所示,用紫外-可见-近红外吸收分光光度计测量织物的光吸收率,结果高达97%;在1kW m-2的模拟太阳光照下,织物的温度可以从室温升至73℃,显示优异的光热转换效果。用视频接触角测量仪测试织物的表面特性,对大豆油的水下接触角高达159.8°,具有超疏油特点,结果如图3所示。
作为应用,将抗油污界面水净化织物(2×7cm2)以二维水通道的方式镶嵌在聚乙烯泡沫(厚度1.5cm)隔热装置上,控制光热织物可以接受太阳光照的面积为2×2cm2,形成太阳能驱动的抗油型界面水蒸发器件。如图4所示。
在性能测试过程中,室内温度维持在24~26℃,湿度为45%~65%。用太阳光模拟器(CEL-AAAS50,Aulight)提供1kW m-2的太阳光照,将抗油型界面水蒸发器件放置于装有水溶液的容器上,用电子天平记录重量变化,计算蒸发速率以衡量器件的蒸发性能。
对器件的抗油性能进行研究时,用注射器将1mL大豆油注入烧杯中,用电子天平记录重量变化,计算蒸发速率以衡量器件在含油水体中的蒸发性能。结果如图5所示,器件在不含油水体和含油水体的蒸发速率分别为1.55kg/m2/h和1.48kg/m2/h,蒸发效率均为85%以上。
对器件的水净化效果进行研究时,将器件放入含油或含模拟海水的烧杯中,在辐照下产生的蒸汽冷凝成液体、到达一个用于收集冷凝水的大烧杯内壁上,收集后的冷凝水用总有机碳分析仪测定TOC浓度、用ICP-MS测定离子含量。结果如图6所示,对含油水体TOC去除率高达99.68%,对模拟海水中金属离子浓度平均去除率高达99.97%(其中Mg2+低于检测限)。
(2)该实例所获得效果
该实例实现了一种抗油污的光驱动水-空气界面水净化织物的制备和应用。将其应用于太阳能界面水蒸发时,蒸发性能优异,可以不受油的影响,并且对含油废水和模拟海水都有优异的净化效果。
Claims (10)
1.一种抗油污的界面水净化织物的制备方法,其特征在于,包括以下步骤:
(1)将吡咯水溶液和氯化铁水溶液加入含有棉织物的容器中,5~40℃下反应0.5~10h,反应后洗涤,得到聚吡咯棉织物;
(2)将没食子酸溶解于三羟甲基氨基甲烷水溶液得到没食子酸水溶液,将APTES溶解于乙醇得到APTES乙醇溶液,然后将没食子酸水溶液和APTES乙醇溶液在含有聚吡咯棉织物的容器中进行混合,5~40℃下反应1~24h,反应后洗涤,在空气中晾干,得到抗油污的界面水净化织物。
2.根据权利要求1所述的抗油污的界面水净化织物的制备方法,其特征在于,步骤(1)中,吡咯水溶液超声分散1~30min后加入含有棉织物的容器中。
3.根据权利要求1所述的抗油污的界面水净化织物的制备方法,其特征在于,步骤(1)中,反应后用乙醇和水交替洗涤1~10次。
4.根据权利要求1所述的抗油污的界面水净化织物的制备方法,其特征在于,步骤(1)中,所述的吡咯水溶液中吡咯的体积分数为0.01~1.0%;所述的氯化铁水溶液中氯化铁的浓度为0.01~2mol/L,其中氯化铁水溶液中溶有0.05~0.6mol/L的HCl。
5.根据权利要求1所述的抗油污的界面水净化织物的制备方法,其特征在于,步骤(1)中,所述的吡咯水溶液和氯化铁水溶液的体积之比为0.1~2:1。
6.根据权利要求1所述的抗油污的界面水净化织物的制备方法,其特征在于,步骤(2)中,所述的三羟甲基氨基甲烷水溶液中三羟甲基氨基甲烷的浓度为0.01~1mol/L,其中溶有HCl以控制溶液pH为7~10;
所述的没食子酸在三羟甲基氨基甲烷水溶液的浓度为0.1~5g/L;
所述的APTES乙醇溶液浓度为10~50g/L;
所述的没食子酸水溶液和APTES乙醇溶液的体积比为1~10:1。
7.根据权利要求1所述的抗油污的界面水净化织物的制备方法,其特征在于,步骤(2)中,反应后用水洗涤聚吡咯棉织物1~10次,并在空气中晾干1~72h。
8.根据权利要求1~7任一项所述的制备方法制备的抗油污的界面水净化织物。
9.根据权利要求8所述的抗油污的界面水净化织物制备太阳能驱动的抗油型界面水蒸发器件中的应用。
10.根据权利要求9所述的应用,其特征在于,包括:
将抗油污的界面水净化织物以二维水通道的方式镶嵌在聚乙烯泡沫隔热装置上,形成太阳能驱动的抗油型界面水蒸发器件。
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