Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
J Am Chem Soc. 2012 Jun 20;134(24):9879-81. doi: 10.1021/ja303037j. Epub 2012 Jun 6.
We combine two amazing abilities found in nature: the superhydrophobic property of lotus leaf and the adhesive ability of mussel adhesive protein. The molecular structure mimic of the single units of adhesive proteins, dopamine, was polymerized in an alkaline aqueous solution to encapsulate microparticles. The as-formed thin polydopamine walls worked as reactive templates to generate silver nanoparticles on the capsuled particles. As a result, core/shell/satellite composite particles were generated with a hierarchical structure similar to the micromorphology of lotus leaf. The composite particles exhibited extremely water repellence after fluorination. Because dopamine can deposit and adhere to all kinds of materials, this method can be applied to diverse microparticles, from organic to inorganic. In addition, particles of different sizes and matters can be modified to superhydrophobic particles in one pot. Magnetic particles have also been prepared which could be used as oil-absorbent and magnetic controlled carriers. "Oil marbles" formed underwater were achieved for the first time.
荷叶的超疏水性和贻贝黏附蛋白的黏附能力。模仿黏附蛋白的单个单元的分子结构，多巴胺在碱性水溶液中聚合以包裹微粒子。形成的薄聚多巴胺壁作为反应性模板，在胶囊化颗粒的表面生成银纳米粒子。结果，生成了具有类似于荷叶微观形态的核/壳/卫星复合颗粒。复合颗粒经过氟化后表现出极强的疏水性。由于多巴胺可以在各种材料上沉积和黏附，因此这种方法可以应用于各种不同的微粒子，包括有机和无机材料。此外，不同大小和性质的颗粒可以一锅法修饰成超疏水颗粒。还制备了磁性颗粒，它们可用作吸油和磁性控制载体。首次在水下形成了“油珠”。
