Dissertation
Dissertation > Industrial Technology > Chemical Industry > The chemical fiber industry > General issues > Production process

Study on Elastic Conductive Fiber

Author WangZheng
Tutor ZhaoJiongXin
School Donghua University
Course Polymer Chemistry and Physics
Keywords conductive fiber elastic polyurethane fiber chemical plating conductivity surface treatment
CLC TQ340.6
Type Master's thesis
Year 2007
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Conductive fiber is one of the fiber materials, which plays an important role in many fields. There are lots of methods to make conductive fiber. In this article, chemical plating, a simple and practical method, was introduced. Using this method, the conductive fiber using polyurethane fiber as base body was made successfully after surface pretreatment.The process of surface treatment on polyurethane fiber was studied. The bath composition and technical specification was selected. The polyurethane fibers which were treated on surface were prepared. It was found that every steps of surface treatment have great effects on the chemical plating of polyurethane fiber.It was also reported the relationship between the quality of silver storey and conditions of liquid by testing conductivity. It was found that concentration of silver nitrate, reducing agent, pH, temperature and time of chemical plating have great effects on the quality of silver storey. Also, after chemical plating, a conductive storey was plated on the polyurethane fiber by analyzing the structure of conductive fiber with SEM, X ray and so on. the results of IR indicated that the structure of polyurethane fiber did not change after chemical plating, so did its inherent feature; similarly, it was found that, by drawing and extending experiment, the mechanical properties of polyurethane fiber which was Ag-coated did not change.It also discussed the relationship between the conductivity of fiber and conditions of liquid. It was found that concentration of silver nitrate and reducing agent, pH, temperature and time of chemical plating have great effects on the capacity of conductive fiber. It was also reported the relationship between the conductivity of fiber and the quality of silver storey on the fiber. The conductivity increased when the quality of silver storey aggrandized.The surface treatment has great effects on the conductive capacity of fiber. By contrasting the conductivity, it was found that the fiber which was surface treated got higher conductive capacity than the fiber which was not surface treated. The conductivity of the fiber which was surface treated is 10~2S/cm, otherwise, The conductivity of the fiber which was not surface treated is very low.It was also discussed the relationship between water fastness of silver storey and the conductivity. It was found that the fiber which was hot treated have higher conductive capacity. By testing the wearable capability of silver storey, it was also found that the fiber which was hot treated has higher conductive capacity.The relationship between the proportion of compress and the conductive capacity of fiber was reported, the proportion of elongation effect on the conductive capacity of fiber was reported, too. It was also reported the conductive capacity of Ag-coated fiber which was drawn and extended. It was found that conductive capacity of Ag-coated fiber was dropped. It was indicated that the Ag-coated fiber can be used as soft lead, pressed sense organ, and al(s)o can be used as soft clavier.It was also discussed the relationship between the radius of bend and the conductivity. And it also reported the times of bend infect on fiber’s conductivity. It was found that the conductivity almost keep fixedness when the times of bend increased. The radius of bend has great infect on fiber’s conductivity. When the radiuses of bend changed from 1mm to 5mm, the conductivity increased. When the radiuses of bend longer than 5mm, the conductivity almost keep fixedness. When the radiuses of bend shorter than 1mm, the conductivity almost keep fixedness, too.Conductive polyurethane fiber will play a very important role in parts of an electronic apparatus.

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