Hydrogen‐bonded polymer multilayer coatings via dynamic layer‐by‐layer assembly
Hydrogen‐bonded polymer multilayer coatings via dynamic layer‐by‐layer assembly
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DOI：
10.1002/pol.20220473
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发表时间：
2022-10
影响因子：
3.4
通讯作者：
Maksim Dolmat;V. Kozlovskaya;Daniel Inman;Claire Thomas;E. Kharlampieva
中科院分区：
文献类型：
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作者：
Maksim Dolmat;V. Kozlovskaya;Daniel Inman;Claire Thomas;E. Kharlampieva
我们开发了聚（N -乙烯基吡咯烷酮/聚（甲基丙烯酸））（PVPON/PMAA）)氢键多层膜的动态组装，并将其与静态多层膜的性能进行了比较。我们发现动态多层膜，其中平面基底在聚合物吸附过程中被震动，导致平面涂层的沉积速度加快15倍。通过椭偏光谱和原子力显微镜测量，发现动态涂层的厚度和粗糙度比静态（无振动）多层膜的厚度和粗糙度增大⁓30%。我们检测了平面静态和动态多层膜的薄膜生长、机械性能、润湿性、水化和pH稳定性，并证明这些性能不受组装方式的显著影响。当暴露于pH = 5.9时，静态和动态涂层均产生微孔膜，接近膜的临界溶解pH = 6。我们发现，在多层膜释放到溶液中以产生平面膜或多层胶囊壳的独立膜时，分子链重排导致静态和动态多层膜的粗糙度降低，并导致动态多层膜的厚度减小。我们的发现可以帮助开发用于传感和控制递送应用的更厚的纳米结构聚合物涂层的快速合成。
We developed the dynamic assembly of the hydrogen‐bonded multilayers of (poly(N‐vinylpyrrolidone/poly(methacrylic acid)) (PVPON/PMAA)) and compared their properties to the static multilayers. We found that dynamic multilayers, wherein a planar substrate is shaken during polymer adsorption, leads to a 15‐time faster deposition of the planar coatings. The thicknesses and roughness of the dynamic coatings were found to be ⁓30% larger than those of static (no shaking) multilayer films as measured by spectroscopic ellipsometry and atomic force microscopy. We examined the film growth, mechanical properties, wettability, hydration, and pH stability of the planar static and dynamic multilayers and demonstrated that these properties were insignificantly affected by the assembly mode. Both static and dynamic coatings produced microporous films when exposed to pH = 5.9, close to the film critical dissolution pH = 6. We discovered that during the release of the multilayer films into a solution to produce free‐standing films either as planar membranes or multilayer capsule shells, the molecular chain rearrangements result in the decreased roughness for both static and dynamic multilayers and lead to a decreased thickness of the dynamic multilayers. Our findings can help develop a rapid synthesis of thicker nanostructured polymer coatings for sensing and controlled delivery applications.