Comparative Molecular Adhesion Studies of Polyacrylic Acids on ZnO Single Crystal Surfaces and ZnO Nanocrystalline Films

聚丙烯酸在 ZnO 单晶表面和 ZnO 纳米晶薄膜上的分子附着力比较研究

• 批准号: 320414069
• 负责人: Professor Dr.-Ing. Guido Grundmeier
• 金额: --
• 依托单位: Arbeitskreis Technische und Makromolekulare Chemie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/320414069?language=en
• 关键词: Comparative; Molecular; Adhesion; Studies; Polyacrylic

The proposal addresses the topic of the comparative adhesion of macromolecules onto zinc oxide monocrystalline surfaces and onto technologically relevant nanocrystalline zinc oxide layers. The fundamental aim of this project is the analysis of the interfacial forces and chemistry between polyacrylic acids and zinc oxide surfaces in aqueous electrolytes by means of single molecule force spectroscopy. Beside van-der-Waals forces, such interfacial forces comprise electrostatic interactions, hydrogen bonds and coordinative bonds. Their strength is influenced by the orientation of the crystal surface, its termination, the nature of the adsorbate layer and the electric double layers of the acrylic acid and the crystal surface. The analysis of these interfacial interactions should allow for the understanding of microscopic and macroscopic adhesion processes between polymers with carboxylic acids and zinc oxide or zinc oxide-coated substrates. These adhesion processes are of great importance for the functionality and stability of ZnO-based composite materials and polymer-coated zinc alloys under ambient and corrosive conditions. To gain a fundamental understanding of such interface processes, polar and nonpolar ZnO single crystals will be studied: they allow for a detailed analysis of the surface termination and at the same time are stable under the ambient conditions relevant for interface stability in electrolytes. The surface chemistry of ZnO substrates will be characterised by ex-situ electron diffraction (LEED) and X-ray photoelectron spectroscopy (XPS); surface topography and surface charge will be analysed in-situ by means of scanning Atomic Force Microscopy (AFM). The interaction of the polyacrylic acid at the electrolyte/oxide interface will be investigated by means of single molecule force spectroscopy using PEG-linkers as a function of the surface chemistry and the electrolyte composition. Moreover, the influence of specific adsorbed anions on the adsorption/desorption behaviour of the macromolecules as a function of different crystallographic orientations will be studied in order to understand the adhesion of acrylic acid-containing polymers to zinc oxide in corrosive environments. Similar studies performed on nanocrystalline ZnO-nanowire layers should additionally allow for a comparison of the pure chemisorption of the macromolecule with the immobilisation of the macromolecule in the confined gaps between the ZnO rod. From these studies we aim at gaining fundamental understanding and prediction of interfacial binding processes at polymer/oxide interfaces in aqueous electrolytes.

该提案介绍了大分子在氧化锌单晶表面上的比较粘附的主题，并介绍了技术相关的纳米晶锌氧化锌层。该项目的基本目的是通过单分子力光谱对聚丙烯酸和氧化锌表面之间的界面力和化学分析进行分析。除了van-waals力外，这种界面力包括静电相互作用，氢键和协调键。它们的强度受晶体表面的方向，其终止，吸附物层的性质以及丙烯酸和晶体表面的电力双层的影响。对这些界面相互作用的分析应允许了解与羧酸和氧化锌或氧化锌涂层底物之间的显微镜和宏观粘附过程。这些粘附过程对于在环境和腐蚀性条件下的基于ZnO的复合材料和聚合物涂层的锌合金的功能和稳定性非常重要。为了获得对此类界面过程的基本理解，将研究极性和非极性ZnO单晶：在与电解质中界面稳定性相关的环境条件下，它们允许对表面终止的详细分析，同时稳定。 ZnO底物的表面化学将以前静电电子衍射（LEED）和X射线光电子光谱（XPS）为特征。表面形貌和表面电荷将通过扫描原子力显微镜（AFM）分析原位。电解质/氧化物界面上的聚丙烯酸的相互作用将通过单分子力光谱研究使用PEG链链谱图作为表面化学和电解质组成的函数。此外，将研究特定吸附阴离子对大分子的吸附/解吸行为的影响，将研究大分子的函数，以了解含丙烯酸酸的聚合物对腐蚀性环境中含丙烯酸酸聚合物对氧化锌的粘附。对纳米固定型纳米线层进行的类似研究应允许将大分子的纯化学吸收与固定在ZnO杆之间的隔离间隙中的固定化学物质。从这些研究中，我们旨在获得对水溶液中聚合物/氧化物界面的界面结合过程的基本理解和预测。

项目成果

Spray coating of poly(acrylic acid)/ZnO tetrapod adhesion promoting nanocomposite films for polymer laminates

• DOI: 10.1016/j.surfcoat.2019.06.083
• 发表时间: 2019-06
• 期刊: Surface and Coatings Technology
• 影响因子: 5.4
• 作者: D. Meinderink;Karlo Nolkemper;Julius Bürger;A. Orive;J. Lindner;G. Grundmeier

Dependance of Poly(acrylic acid) Interfacial Adhesion on the Nanostructure of Electrodeposited ZnO Films

• DOI: 10.1021/acsanm.8b02091
• 发表时间: 2019-02-01
• 期刊: ACS APPLIED NANO MATERIALS
• 影响因子: 5.9
• 作者: Meinderink, Dennis;Orive, Alejandro Gonzalez;Grundmeier, Guido
• 通讯作者: Grundmeier, Guido

Electropolymerization of acrylic acid on carbon fibers for improved epoxy/fiber adhesion

• DOI: 10.1016/j.surfcoat.2017.04.039
• 发表时间: 2017-07-15
• 期刊: SURFACE & COATINGS TECHNOLOGY
• 影响因子: 5.4
• 作者: Bauer, Andreas;Meinderink, Dennis;Grundmeier, Guido
• 通讯作者: Grundmeier, Guido

Electrodeposition of poly(acrylic acid) on stainless steel with enhanced adhesion properties

• DOI: 10.1002/sia.6440
• 发表时间: 2018-11
• 期刊: Surface and Interface Analysis
• 影响因子: 1.7
• 作者: D. Meinderink;A. Orive;G. Grundmeier