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Applications for conductive polymer in the electrical industry: innovation report
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Chung, Wai Kam (2019) Applications for conductive polymer in the electrical industry: innovation report. EngD thesis, University of Warwick.
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Official URL: http://webcat.warwick.ac.uk/record=b3493130~S15
Abstract
Corona and partial discharges affect a number of different segments of the electrical industry, such as the economic impact on downtime cost and the disruption to people’s daily activities. Many products are available in the market place such as semi-conducting paints or wrapping tapes, however each has disadvantages in application.
X-Fiper are one of three manufacturers in the world producing meta-aramid paper for the electrical insulation industry and wish to investigate a solution for corona protection. Therefore the aim of this research was to develop and deploy a new product solution using the X-Fiper process to resolve the aging issue caused by high voltage peaks. Conductive polymer was selected to integrate with insulation polymer to potentially enhance the capability of diverting the high energies pulses and protect the windings and wall insulation. With an aim to create materials to act as an electrical insulation material (EIM) to both insulate and absorb high energy impulses; and be conductive and re-direct the high energy impulses. The innovative material is to be used in conductor wrapping application. A stage gate new product development plan was implemented to carry out this project.
From a literature review, PEDOT:PSS was selected as the best candidate conductive material for this research. There are five paper making process stages at X-Fiper, which were all investigated for their ability to integrate PEDOT:PSS into production. The five process stages were meta-aramid polymer solution, in fiber, in fibrid, base paper and the final calendered paper. The results show that PEDOT:PSS and meta-aramid could be mixed in polymer solution, but separated after 24 hours if not agitated. In fibrid films and fiber, the PEDOT:PSS could not be retained due to the washing processes. The base paper, when integrated with PEDOT:PSS showed enhanced conductivity. When calendered, the conductivity was enhanced. This process has been taken on to production trials. The optical microscopy from prototypes evidenced that the integration of PEDOT has shown no significant impact on structure of the paper. This research has confirmed and expanded the uses of ICP as integrated PEDOT:PSS on meta-aramid paper. The optimization of aqueous PEDOT:PSS needed in this project has been designed as 1% w.t. solid content and the confirmation of process mechanism to increase conductivity can be achieved by additional layers of coating or by increasing the PEDOT:PSS solid content. Conductive meta-aramid paper offers a price competitive solution and freedom from metal particle or carbon black in the electrical industry. Customers have validated the prototype screening in terms of paper properties and are prepared to go for next stage of material qualification in their application trials and industrial qualification. Further work is required to develop the process for large scale manufacture to ensure coating uniformity and conductivity.
Item Type: | Thesis (EngD) | ||||
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Subjects: | Q Science > QD Chemistry | ||||
Library of Congress Subject Headings (LCSH): | Conducting polymers, Polymers -- Electric properties, Conducting polymers -- Industrial applications, Electric conductivity | ||||
Official Date: | April 2019 | ||||
Dates: |
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Institution: | University of Warwick | ||||
Theses Department: | Warwick Manufacturing Group | ||||
Thesis Type: | EngD | ||||
Publication Status: | Unpublished | ||||
Supervisor(s)/Advisor: | Goodship, Vannessa , Neailey, Kevin | ||||
Extent: | xii, 124 leaves :illustrations | ||||
Language: | eng |
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