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Study on Properties of Conductive Adhesive Prepared with Silver Nanoparticles Modified by Silane Coupling Agent
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Study on Properties of Conductive Adhesive Prepared with Silver Nanoparticles Modified by Silane Coupling Agent
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Natural Science Foundation of Fujian Province of China (2009J05030) ; Key Program of Fujian Provincial Department of Science & Technology (2010H0017); The 2011's Fujian Provincial Innovation Experiment Program for University Students (553)

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    摘要:

    采用經(jīng)硅烷偶聯(lián)劑KH-560表面改性的納米銀粉作為填料，環(huán)氧樹脂為基體在180 ℃固化得到銀導(dǎo)電膠。借助透射電子顯微鏡（TEM）、紅外光譜（FTIR）、差示掃描量熱法（DSC）等測試手段，對改性后納米銀粉和導(dǎo)電膠進行了表征。研究了銀粉含量、固化時間對導(dǎo)電膠性能的影響。結(jié)果表明：KH-560改性后的納米銀粉平均粒徑為20 nm，分散均勻；KH-560以化學(xué)鍵合的方式吸附在納米銀顆粒的表面。銀粉含量、固化時間等均會影響導(dǎo)電膠的性能。當(dāng)銀粉含量為55%，固化時間為15 min時，導(dǎo)電膠的體積電阻率達最小值為2.5×10-3 ?·cm。與未做任何表面處理的納米銀粉填充的導(dǎo)電膠相比, KH-560改性后納米銀粉所得導(dǎo)電膠的電導(dǎo)率提高了3－5倍。

    Abstract:

    Silver nanoparticles modified by silane coupling agent KH-560 were used as conductive filler to prepare conductive adhesive at 180 ℃ in epoxide resin vehicles. The as-modified Ag nanoparticles and conductive adhesive were characterized by transmission electron microscopy (TEM), Fourier transform infrared spectra (FTIR) and differential scanning calorimetry (DSC). The effects of silver content and curing time on the properties of conductive adhesive were studied. The results show that KH-560 modified Ag powders with a particle size of approximately 20 nm are uniformly dispersed and KH-560 molecules are adsorbed on silver particle surface. Silver content and curing time could influence the properties of conductive adhesive significantly. The bulk resistivity of conductive adhesive with 55 wt% silver nanoparticle and curing time of 15 min reaches a minimal value of 2.5×10-3 ?·cm. Compared with the conductive adhesive filled with unmodified silver nano-powders, the bulk resistivity of conductive adhesive filled with modified silver nano-powders increases by 3-5 times.

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李先學(xué),鄭炳云,許麗梅,吳丹丹,劉宗林,張惠釵. Study on Properties of Conductive Adhesive Prepared with Silver Nanoparticles Modified by Silane Coupling Agent[J].稀有金屬材料與工程,2012,41(1):24~27.[Li Xianxue, Zheng Bingyun, Xu Limei, Wu Dandan, Liu Zonglin, Zhang Huichai. Study on Properties of Conductive Adhesive Prepared with Silver Nanoparticles Modified by Silane Coupling Agent[J]. Rare Metal Materials and Engineering,2012,41(1):24~27.]
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  • 收稿日期:2011-04-22
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