Integration of flexible capacitive sensors in polymers for monitoring of polymerization and degradation processes.

将柔性电容传感器集成到聚合物中,用于监测聚合和降解过程。

基本信息

项目摘要

Online-Process-Monitoring (OPM) has the potential to extend the area of application of fibre reinforced polymers by reducing processing times and costs while increasing the quality. It is important to monitor the consolidation process, especially the curing process, since it is not always homogenous in the whole fabricated part. Therefore, sensors should be integrated in the material to monitor the fabrication process inside the laminate. Hence, it is necessary that the sensors withstand the fabrication process and do not influence the functionality of the produced part. To fulfil this goal, a miniaturized flexible dielectric sensor was developed within the project “Integration of Flexible Capacitive Sensors in Polymers for Polymerization and Degradation Monitoring”. The sensors were embedded in carbon fibre reinforced thermosetting polymers and the curing process was successfully monitored. Furthermore, the influence of the sensor on the mechanical integrity of the produced part was investigated. Quasistatic tests were used to demonstrate that the sensor does not significantly degrade the mechanical properties of the material. Within the scope of this project, the curing of thermosets as matrix material was investigated. Beside thermosets, thermoplastics are used in the fibre reinforced polymer production. Thermoplastics have the advantage that the production process can be considerably faster. One important consideration in terms of industrial application is that it is possible to reduce the manufacturing cycle time by using thermoplastics. Furthermore they can be remelted, which allows for repairing and recycling defect parts. During the curing process of thermosets, the polymer chains crosslink and covalent bonds are created. On the contrary, the polymer chains of thermoplastics do not crosslink but they can be aligned to each other. The ratio between aligned and amorphous regions is called degree of crystallization. This degree determines the mechanical and thermal properties of the material and can be adjusted by varying the process parameters. Therefore, the degree of crystallization should be measured online during the fabrication process of the fibre reinforced polymers using dielectric sensors and optical fibres.The goal of the project is to monitor the crystallization of thermoplastics during the fabrication process of fibre reinforced plastic composites, especially to measure and control as accurate as possible the degree of crystallization and the load transfer point to determine the solidification point inside the material.In parallel to the miniaturized dielectric sensors, optical fibre sensors should also be embedded in order to cover a broader electromagnetic spectrum. The combination of both measurement principles increases the amount of information significantly, which helps determining a suitable model for the evaluation of the process.
在线过程监控(OPM)通过减少加工时间和成本,同时提高质量,有可能扩大纤维增强聚合物的应用领域。重要的是要监测固结过程,特别是固化过程,因为它在整个制造部件中并不总是均匀的。因此,传感器应集成在材料中,以监控层压板内部的制造过程。因此,传感器必须能够承受制造过程,并且不影响所生产部件的功能。为了实现这一目标,在项目“聚合物中柔性电容传感器的集成用于聚合和降解监测”中开发了小型化柔性介电传感器。传感器被嵌入碳纤维增强热固性聚合物中,并成功地监测了固化过程。此外,传感器的机械完整性的生产的一部分的影响进行了研究。准静态测试用于证明传感器不会显著降低材料的机械性能。在本项目范围内,研究了热固性材料作为基质材料的固化。除了热固性塑料外,热塑性塑料也用于纤维增强聚合物的生产。热塑性塑料的优点是生产过程可以相当快。在工业应用方面的一个重要考虑是,通过使用热塑性塑料可以减少制造周期时间。此外,它们可以重新熔化,这允许修复和回收缺陷部件。在热固性材料的固化过程中,聚合物链交联并产生共价键。相反,热塑性塑料的聚合物链不交联,但它们可以彼此对齐。取向区域和非晶区域之间的比率称为结晶度。该程度决定了材料的机械和热性能,并且可以通过改变工艺参数进行调整。因此,在纤维增强塑料复合材料的制备过程中,需要利用介电传感器和光纤对纤维增强塑料的结晶度进行在线测量。本项目的目标是在纤维增强塑料复合材料的制备过程中监测热塑性塑料的结晶度,特别是尽可能精确地测量和控制结晶度和载荷转移点以确定凝固点与小型化介电传感器平行,还应嵌入光纤传感器,以覆盖更广泛的电磁频谱。这两种测量原理的结合显著增加了信息量,这有助于确定用于评估过程的合适模型。

项目成果

期刊论文数量(8)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Sensor Integration in Fiber‐Reinforced Polymers
  • DOI:
    10.1002/9783527679249.ch7
  • 发表时间:
    2017-12
  • 期刊:
  • 影响因子:
    0
  • 作者:
    M. K. Moghaddam;M. Salas;M. Koerdt;C. Brauner;M. Hübner;D. Lehmhus;W. Lang
  • 通讯作者:
    M. K. Moghaddam;M. Salas;M. Koerdt;C. Brauner;M. Hübner;D. Lehmhus;W. Lang
Smart fiber-reinforced polymer composites and their resource-efficient production by means of sensor integration
智能纤维增强聚合物复合材料及其通过传感器集成的资源高效生产
  • DOI:
    10.1515/9783110584455-012
  • 发表时间:
    2021
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Koerdt;Hübner;Kahali Moghaddam;Herrmann
  • 通讯作者:
    Herrmann
Measuring Material Moisture in Fiber Reinforced Polymers by Integrated Sensors
  • DOI:
    10.1109/jsen.2018.2815029
  • 发表时间:
    2018-05-01
  • 期刊:
  • 影响因子:
    4.3
  • 作者:
    Salas, Mariugenia;Huebner, Martina;Lang, Walter
  • 通讯作者:
    Lang, Walter
Online monitoring of thermoplastic crystallization with miniaturized interdigital sensors
使用小型叉指传感器在线监测热塑性塑料结晶
  • DOI:
    10.1109/sensors47125.2020.9278800
  • 发表时间:
    2020
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Hübner;Koerdt
  • 通讯作者:
    Koerdt
Materialintegrierte Sensorik für Fahrzeug-Leichtbautechnik
用于轻型车辆构造技术的材料集成传感器
  • DOI:
    10.1007/978-3-662-48944-4_10
  • 发表时间:
    2016
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Hübner;Moghaddam;Dumstorff
  • 通讯作者:
    Dumstorff
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Professor Dr.-Ing. Axel Herrmann其他文献

Professor Dr.-Ing. Axel Herrmann的其他文献

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{{ truncateString('Professor Dr.-Ing. Axel Herrmann', 18)}}的其他基金

Consolidation of Thermoplastic hybrid yarn materials
热塑性混合纱线材料的整合
  • 批准号:
    394279584
  • 财政年份:
    2018
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Development and validation of a virtual process chain for composite structural components considering imperfections with application to a rotor blade component
考虑到应用于转子叶片部件的缺陷,开发和验证复合结构部件的虚拟工艺链
  • 批准号:
    329147126
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Pressure dependent modeling of thermoet epoxy-resins for theappllication in carbon composites
用于碳复合材料应用的热固性环氧树脂的压力相关建模
  • 批准号:
    317456845
  • 财政年份:
    2016
  • 资助金额:
    --
  • 项目类别:
    Research Grants
User-Adaptive Interactions with material sciencesresearchdata (AimData)
与材料科学研究数据的用户自适应交互 (AimData)
  • 批准号:
    188439574
  • 财政年份:
    2011
  • 资助金额:
    --
  • 项目类别:
    Research data and software (Scientific Library Services and Information Systems)
Influences of environmental conditioning and damage on the dispersive propagation and damping behaviour of Lamb waves in fiber reinforced plastics
环境条件和损伤对纤维增强塑料中兰姆波色散传播和阻尼行为的影响
  • 批准号:
    212716418
  • 财政年份:
    2011
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Sub-project: Development and evaluation of textile fibre-metal-connections
子项目:纺织纤维-金属连接的开发和评估
  • 批准号:
    165666554
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Research Units
Modellierung und Simulation des mechanischen Verhaltens von Kohlenstoff-Rovings
碳粗纱机械行为的建模和仿真
  • 批准号:
    63444559
  • 财政年份:
    2008
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Identifikation und Bewertung von Impactvorgängen mit einem wellenbasierten Verfahren
使用基于波浪的方法识别和评估影响过程
  • 批准号:
    28567898
  • 财政年份:
    2006
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Untersuchung zur Entwicklung von Gestaltungsrichtlinien für impacttolerante Faserverbundstrukturen
耐冲击纤维复合材料结构设计指南制定的调查
  • 批准号:
    5417041
  • 财政年份:
    2004
  • 资助金额:
    --
  • 项目类别:
    Research Grants

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