導電碳黑母粒之奈米分散製程及流變研究

The Study on Nano Dispersed Process and Rheological of Electrical Conductivity Carbon Black Matrix

楊政哲(Cheng-Che Yang)

指導教授 ： 芮祥鵬

國立臺北科技大學/工程學院/有機高分子研究所/碩士(2008年)

https://doi.org/10.6841/NTUT.2008.00033

摘要

當絕緣之高分子與具有導電性質的塑料摻混時，如金屬粉末、石墨、碳黑、奈米碳管，可以改變其導電性質。在填充導電塑料中，一般最被廣泛應用便為碳黑(Carbon black)，因為碳黑具有加工性好、成本低廉、以及導電性佳等特殊性質。因此在本篇研究中所使用導電塑料便為奈米級的碳黑(VXC72)，但由於碳黑容易團聚，而造成工業生產上的困難，諸如抽絲時碳黑團聚過大之顆粒造成了篩網的堵塞，進而使得被堵住之篩網有漏料無法順利紡絲，抽絲過程不得不被迫終止，因此獲得優質的碳黑母粒在於高溫分散劑和雙螺桿製程是兩大關鍵，本篇研究所使用之分散劑為合成含有磺酸根(SO3-)之水溶性PET，由於此分散劑具有能耐高溫及特殊分散碳黑機制等性質，使得抽絲時所須的碳黑母粒即使在高達270℃高溫混煉下，也能保持其分散特性而不裂解，在分散碳黑母粒的壓升實驗中，結果顯示當分散劑與碳黑比例為1：1時有最佳的分散效果，從研究中發現，當碳黑填充於高分子之母粒濃度高於3~5%時便會有很優良的導電網絡系統。且其高濃度母粒之導電網絡系統也因良好的分散足以構成，其電阻值約為103Ω/cm2之導電等級，證明了分散劑與碳黑之間具有優良的分散效果。

關鍵字

碳黑 ； 高分子 ； 分散劑 ； 導電母粒 ； 流變學

並列摘要

When the insulating polymers mixed with conductive material, like metal powder, graphite, carbon black(CB), carbon nanotubes(CNTs), which can improve the conductivity property. In the filler of conductive material, among the available fillers, CB has been used extensively because of the relative advantages of technology, low cost, and high conductivity properties. In this investigate to use conductive material is nano carbon black(VXC72), but carbon black due to aggregation behavior, account for the difficult in the industry like spinning when carbon black agglomerate too large which make the spin pack of sieve to choke and then can not spinning favorably, the spinning process must to stop. To obtain a well dispersed carbon black matrix, a high-temperature-endurable dispersant and a special two-screw extruder are two crucial issues. In this investigate, we used the copolymer which contain sulfonate(SO3-) and solubility in the water. Due to the dispersant has high-temperature-endurable and disperse carbon black, the carbon black master batch mixed in the spinning process about 270℃ also can have dispersion property. The carbon black master batch in the pressure test, result the dispersant ratio to carbon black are 1：1 will have a well disperse. In the investigate, the electrical conductivity percolation threshold of master batch concentration was found to be 3~5% and electric conduction about 103Ω/cm2. Result to prove between the dispersant and carbon black have well disperse.

並列關鍵字

Carbon Black ； Polymer ； Surfactant ； Conductive master batch ； Rheology

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