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標題: | 奈米銀線的製備及穩定性探討與防電磁波材料之研究 Fabrication and Stability of Silver Nanowires and Fabrication of graphene-foam for Electromagnetic Interference Shieding |
作者: | Jia-Min Suen 孫嘉敏 |
指導教授: | 謝國煌(Kuo-Huang Hsieh) |
關鍵字: | 奈米銀線,聚乙烯?咯烷酮,雙軸電紡,氧化石墨烯,石墨烯,電磁波干擾,泡棉, silver nanowires,Polyvinylpyrrolidone,coaxial electrospinning,graphene oxide,graphene,foam,EMI shieding, |
出版年 : | 2017 |
學位: | 碩士 |
摘要: | 本研究有三個部分,奈米銀線的穩定性探討、防電磁波泡棉的開發、雙軸靜電紡絲奈米銀線之懸浮液與薄膜導電性。
奈米銀線於性質方面有很好導電性及光學性質,其分散液也可利用簡單的噴塗方式來製備薄膜,不僅導電性好也有潛力發展成可撓性薄膜,再加上奈米銀線的製備成本低。故是一種極有潛力取代舊有ITO材料來應用於電子產品中。但由於奈米銀線在高溫時的不穩定性(高溫形變),變成了奈米銀線在應用上的一個障礙。故本研究的第一部分則是希望能克服奈米銀線的高溫形變,我們利用噴灑塗佈的方式來製備薄膜,並控制氧化石墨烯(GO)與奈米銀線的比例,成功的克服奈米銀線會高溫形變的問題。 第二部分實驗--防電磁波泡棉的開發。因為現今科技的發達,電子產品的廣泛應用,產生的電磁輻射污染成為了一個潛在的問題。而我們利用簡單的含浸方式,使用了石墨烯(N006)、鋁片、奈米銀線並混合高分子黏著劑,讓原本沒有預防電磁波效果的PU泡棉,附著上填料後達到將近22 dB的防電磁波泡棉。 第三部分實驗與第一部分實驗有關,由於奈米銀線的密度大,要讓奈米銀線懸浮是一件不容易的事。我們使用雙軸電紡的方式,讓親水的聚乙烯吡咯烷酮(Polyvinylpyrrolidone, PVP)當外軸包覆內軸的銀線,當回溶到水中後PVP即可當懸浮劑且因銀線外有PVP的包覆而自然的懸浮在水中,並以外加硝酸銀的方式來提升薄膜的導電性。 The thesis is divided into three parts: stability of silver nanowires、foam for electromagnetic interference shielding、 fabrication of silver suspension by coaxial electrospinning process and conductive thin film. Silver nanowires have electrical and optical properties. Suspension of silver nanowires can be made the thin film by spray coating. The thin film based on silver nanowires not only have conductivity but also have the potential to develop into flexible films. So silver nanowires have the potential to replace ITO. Because silver nanowires is unstability at high temperature, it is the obstacle of application of silver nanowires. So the first part, we want to overcome the unstability of silver nanowires at high temperature. We have successfully stabilized the silver wire using graphene oxide(GO) by spray coating. The the second part, fabrication of graphene-foam composites for electromagnetic interference shieding. Because of the widespread use of electronic products, resulting in electromagnetic radiation pollution has become a potential problem. So the materials for EMI shielding have received attention. We fabricated the graphene-foam with 20 dB by dipping the foam into graphene and Al/or silver nanowires solution. The last part, we fabricated suspension of silver nanowires by coaxial electrospinning process. That is Polyvinylpyrrolidone,(PVP) as shell and AgNO3 as core。Because PVP is hydrophilic, PVP can be a suspending agent. Because silver nanowires is coated with PVP, silver nanowires can dispered in aqueous phase. Then we fabricated the film by drop coating, and we added AgNO3 in the suspension to enhance electrical of the film. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/68199 |
DOI: | 10.6342/NTU201704351 |
全文授權: | 有償授權 |
顯示於系所單位: | 化學工程學系 |
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