First-time application of a combination of electrospray ionisation (ESI) polymer-deposition and dielectric barrier discharge for an improved adhesion between carbon fibres and polyurethane

该奖学金旨在开发电喷雾电离的新应用，该应用已在质谱中广泛应用于超薄聚合物层的沉积。这种新的聚合物薄膜沉积技术可以沉积极薄的促进粘合的中间层，有望改善碳纤维和聚氨酯弹性体之间的粘合。计划在介质阻挡放电的余辉中使用基于电喷雾电离（ESI）的聚合物沉积与碳纤维表面活化相结合。这种新方法已被示范应用于聚合物表面。由于ESI工艺的电泳特性和碳纤维的导电性，预计ESI可以在碳纤维上建立无针孔沉积的超薄促进粘附的聚合物层。与基于等离子体的涂层工艺相比，该方法的一个主要优点是个性化聚合物分子的无碎片沉积。在空气、氩气或氧气中，在介质阻挡放电等离子体的余光中清洗和激活碳纤维，并在碳纤维上沉积基于esi的聚合物，预计会产生一种强附着力、非常薄的聚合物，作为聚氨酯基体的附着力促进剂。ESI沉积的聚合物溶液将被选择包含单组分功能的聚合物。这些基团可以与PU预聚物的异氰酸酯端基形成化学聚氨酯或尿素键。因此，碳纤维和聚氨酯基体之间的附着力有望得到增强。利用这种新开发的ESI薄膜沉积工艺的创新应用，在考虑低成本大气等离子体和沉积工艺的情况下，应该有可能在碳纤维上生成专门定制和优化的界面层。XPS， FTIR和REM以及zeta电位和机械粘附的测量将用于表征。

The scholarship aims at developing a new application of electrospray ionisation, which has found widespread use in mass spectroscopy, in the deposition of ultra-thin polymer layers. This new polymer film deposition technique allows depositing extremely thin adhesion-promoting interlayers that are expected to improve the adhesion between carbon fibres and polyurethane (PU) elastomers. It is planned to use electrospray ionisation-based (ESI) polymer deposition in combination with carbon fibre surface activation in the afterglow of a dielectric barrier discharge. This new approach has been exemplary applied to polymer surfaces. Due to the electrophoretic character of the ESI process and the electrical conductivity of carbon fibres, it is expected that ESI allows to establish pin-hole free deposition of ultra-thin adhesion-promoting polymer layers on carbon fibres. A main advantage of the proposed method compared to plasma-based coating processes is the fragmentation-free deposition of individualized polymer molecules. ESI-based polymer deposition on carbon fibres that were cleaned and activated in the afterglow of a dielectric barrier discharge plasma in air, argon, or oxygen is expected to result in a strongly adherent, very thin polymer, acting as adhesion promoter to polyurethane matrices. The polymer solution deposited by ESI, will be chosen to contain polymers of monosort functionalities. These groups can form chemical urethane or urea bonds to isocyanate endgroups of PU prepolymers. As a result, strongly enhanced adhesion between carbon fibres and polyurethane matrices is expected. Using this innovative application of the newly-developed ESI film deposition process it should be possible to generate specifically-tailored and optimized interface layers on carbon fibres under consideration of low-cost atmospheric plasma and deposition processes.XPS, FTIR and REM as well as measurement of zeta-potential and mechanical adhesion will be used for characterization.