電化學放電法製備奈米銀流體之性質研究

The Research on the Properties of Colloidal Silver Prepared by Electrochemical Discharge Method

陳鈺鈞(Yu-Chun Chen)

指導教授 ： 曾國雄

國立臺北科技大學/電資學院/電機工程系所/碩士(2008年)

摘要

本論文利用電化學放電法(Electrochemical Discharge method , ECD method)來製備奈米銀流體。奈米銀流體製備完成後，首要任務即是避免銀顆粒發生聚集，基於此考量，本論文結合電弧放電法(Arc Discharge method, AD method)及化學保護劑來製備奈米銀流體，此結合方法稱為電化學放電法。此方法即在超純水中添加檸檬酸鈉做為介電溶液，接著再放電產生銀顆粒，檸檬酸離子會吸附到奈米銀顆粒表層，防止銀顆粒發生聚集，以達到保護銀顆粒之目的。本論文針對電極損耗、銀離子還原、紫外光/可見光吸收光譜、粒徑、表面電位、SEM及成分做分析比較，根據表面電位分析結果，電化學放電法所製備的奈米銀流體，銀顆粒可以穩定地懸浮於超純水中。最後本論文設計一套連續生產來提高製備奈米銀流體之容量。

關鍵字

電化學放電法 ； 奈米銀顆粒 ； 檸檬酸鈉

並列摘要

The study produces colloidal silver by electrochemical method (ECD method). The first mission after the colloidal silver is produced is to prevent silver nanoparticles from aggregation. Based on the consideration, the study combines the arc discharge method with a chemical preservative for the preparation of colloidal silver. The combination method is called ECD method. The ECD method adds trisodium citrate in the ultra pure water as the dielectric medium and then arc discharge is to use of creating colloidal silver. The citrate ion will be capping on the silver nanoparticles surface to prevent the clumping of nanoparticles so that to protect the silver nanoparticles. In this study, the electrode erosion mass and the phenomenon of ionic silver returns to the original state was discussed, furthermore the detail analysis and component comparison of colloidal silver was analyzed by UV/vis absorption spectrum, size distribution, zata potential (the superficial electric potential), and SEM. The zeta potential also confirm that silver nanoparticles prepared by ECD method stably suspend in the ultra pure water. Finally the study designs a set of continuous production system to enhance the volume of the
colloid silver.

並列關鍵字

ECD (Electrochemical discharge) method ； Silver Nanoparticle ； Trisodium Citrate

參考文獻

[3] Richard P F. “There's Plenty of Room at the Bottom,” The annual meeting of the American Physical Society, 1959.

[4] Kubo R. “Electrical Properties of Metallic Fine Particles,” Journal of the Physical Society of Japan, vol.17, iss.6, 1962, pp.975-986.

[5] 王順和，微型金線及其鍍鉻處理後的機械性質之研究，碩士論文，國立成功大學，2003，第1頁。

[9] J. Alan Creighton and Desmond G. Eadon, “Ultraviolet-visible absorption spectra of the colloidal metallic elements,” Journal of the Chemical Society, vol.87, 1991, pp.3881-3891.

[10] Li Gui-an, “Influence of physical properties of silver colloidal disperse system on Tyndall effect,” Journal of Shaanxi Normal University, vol.29, no.4, 2001.