Environmentally friendly and energy efficient pultrusion

该项目的目的是开发一种新的制浆技术，这种技术对环境友好，并且允许对新的快速固化树脂系统进行评估。在常规方法中，增强纤维在树脂浴中浸渍，然后通过加热的模具以交联树脂并使拉挤部件成形。在新的制造技术中，树脂的成分将储存在单独的容器中，并使用定制设计的液体输送系统按需泵送。纤维的高效和有效的浸渍将使用注射头和电流体动力雾化的新颖组合以及使用机械和基于静电的技术的纤维铺展来实现。当前提案的背景是成功完成了EPSRC/DTI关于清洁纤维缠绕的项目，该项目展示了在不使用树脂浴的情况下注入增强纤维的技术。然而，在目前的项目中，将开发新技术用于制浆工艺，其中多达20个单独的纤维束将在不使用传统树脂浴的情况下浸渍。将评估快速固化树脂的固化动力学，并使用适当的模型来预测展开纤维束的浸渍率。以前开发的光纤传感器将用于实时化学过程监测和结构完整性评估。这种新的制造技术的绿色证书将使用生命周期评估和生命周期成本分析进行评估。

The aim of this project is to develop a new pultrusion technique that is environmentally friendly and one that permits new and fast-curable resin systems to be evaluated. In the conventional process, the reinforcing fibres are impregnated in a resin bath and then passed through a heated die to cross-link the resin and to shape the pultruded component. In the new manufacturing technique, the components of the resin will be stored in separate containers and pumped on-demand using a custom-designed liquid delivery system. Efficient and effective impregnation of the fibres will be achieved using a novel combination of an injection-head and electro hydrodynamic atomisation, and fibre spreading using mechanical and electrostatic-based techniques. The background to this current proposal is the successful completion of an EPSRC/DTI project on Clean Filament Winding where the technology for injecting the reinforcing fibres without the use of a resin bath was demonstrated. However, in the current project, new technology will be developed for the pultrusion process where up to 20 individual fibre bundles will be impregnated without using a conventional resin bath. The cure kinetics of the fast-curing resins will be evaluated and appropriate models will be used to predict the impregnation rates for the spread fibre bundles. Previously developed fibre optic sensors will be used to enable real-time chemical process monitoring and structural integrity assessment in-service. The green credentials of this new manufacturing technique will be assessed using life cycle assessment and life cycle cost analysis.