植酸-金属络合物超亲水薄膜
文献类型：学位论文
| 作者 | 李龙彪 |
| 学位类别 | 硕士 |
| 答辩日期 | 2015-04 |
| 授予单位 | 中国科学院研究生院 |
| 授予地点 | 中国科学院长春应用化学研究所 |
| 导师 | 苏朝晖 |
| 关键词 | 植酸-金属络合物 超亲水 油水分离 防雾透明表面 |
| 中文摘要 | 近年来，超亲水表面由于其广阔的应用前景而被科研工作者们密切关注。通常来讲，超亲水表面是指水滴的表观接触角小于5°的表面。过去十几年里，随着纳米科学技术的不断发展，人们开发了越来越多的制备超亲水表面的方法，但是这些方法仍然存在很多不足之处。例如：设计路线复杂、过程耗时长以及设备昂贵等。而且这些方法通常只适用于特定的基底，大大限制了其应用范围。因此，本论文选用天然物质植酸作为有机框架，三价铁离子作为连接单元，构建了含有大量POOH基团的交联网络薄膜，可以使多种基底表面实现超亲水的功能。 首先，我们将干净的硅基底浸泡在植酸溶液中，几分钟后加入氯化铁溶液，混合的溶液中出现大量白色络合物。再过几分钟，取出硅片，发现该硅基底的接触角由原来的58°变成了0°。随后我们将该方法应用到多种基底上均得到了超亲水的表面。 接下来，我们利用原子力显微镜，研究了植酸浸泡时间，成膜时间，原料浓度等参数对植酸金属薄膜形成及生长产生的影响，发现薄膜生长过程很快达到平衡，厚度仅为10 nm左右。之后我们发现，经过层层沉积的方法，薄膜厚度可以呈线性增长，因此可以通过此方法精确调控薄膜厚度。 最后，我们将植酸金属薄膜应用到油水分离和防雾透明表面上，并对这些应用的实际效果进行了测试。发现经植酸金属薄膜修饰的不锈钢网在油水分离时，具有很高的分离效率和很大的水通量。经植酸金属薄膜修饰的的石英片具有防雾透明的功能，有望被应用到汽车车窗，眼镜，潜水镜以及腹腔镜等镜片上。 以上工作证明，利用植酸金属络合物在固体表面上成膜，是一种简单快速且适用于多种基底的构建超亲水表面的新方法。 |
| 英文摘要 | In recent years, superhydrophilic surface has attracted great attention because of its broad application prospects. Usually, superhydrophilic surface is refer to the surface with water contact angle less than 5°. Over the past ten years, with the development of nano-science and technology, more and more methods for the preparation of superhydrophilic surface have been developed. However, these methods have various limitations, such as complicated routes, time-consuming procedure, and the use of complex instrumentation and so on. Moreover, these methods are generally applied on a given or a type of substrates and can hardly be developed as a general route to be rationally applied on a range of materials, which limits the range of applications. In this regard, we chosed natural phytic acid(PA) as organic ligand and iron (FeⅢ) as the inorganic cross-linker, to build a crosslinked network film that can modify a variety of substrates to be superhydrophilic because of massive POOH groups. Firstly, the cleaned Si substrate was immersed in the PA solution for several minutes, then the FeCl3?6H2O solution was added to this PA aqueous solution. A lot of white complex appeared in the mixed solution at once. After several minutes, the FeⅢ-TA coated Si substrate was removed and the contact angle of the substrate turned to 0° from 58°. After that, we found that this approach can be applied on a series of materials to construct superhydrophilic surfaces. Secondly we analysed the influence of immersion time, deposition time and reagent concentrations on the formation and growth of the FeⅢ-PA film. It is found that the FeⅢ-PA film growth quickly achieve balance. The maximum thickness of the FeⅢ-PA film is only about 10 nm. Then we found that the thickness of the FeⅢ-PA film can be further increased by simply repeating the rapid coating procedure, and this increase present linear rule. Therefore, the film thickness can be precisely regulated by this method. Finally, we successfully made a variety of substrates be superhydrophilic by coating the FeⅢ-PA film. Lastly, we applied the FeⅢ-PA film to the oil-water separation and anti-fog transparent surfaces, and then tested the actual effect of these applications. It is found that the FeⅢ-PA film coated meshes can selectively separate water from various oil-water mixtures with high separation efficiency and high-flux. The FeⅢ-PA film coated quartz slides with anti-fogging and transparent features are highly desired in automobile windshields, eyeglasses, swimming goggles, lenses in laparoscopes and so on. The above work indicates that we provide a versatile strategy with facile, low-cost and environment-friendly features on multiple classes of materials to give surface superhydrophilicity by using the FeⅢ-PA complexes film. |
| 语种 | 中文 |
| 公开日期 | 2016-04-26 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/63605]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_学位论文 |
| 推荐引用方式 GB/T 7714 | 李龙彪. 植酸-金属络合物超亲水薄膜[D]. 中国科学院长春应用化学研究所. 中国科学院研究生院. 2015. |
入库方式： OAI收割
来源：长春应用化学研究所
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