4.5，m(TEA)/m(AgNO3)=1，可得到粒度均勻、形狀規(guī)則、分散性好、粒徑為0.15 μm左右的球形超細銀粉"/>

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廢感光膠片制備超細銀粉的研究
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國家科技支撐計劃項目（2008BAC46B04）；江蘇省高?？蒲谐晒a(chǎn)業(yè)化推進項目（JH09-16）


Preparation of Superfine Silver Powder from Waste Photosensitive Film
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    摘要:

    以廢感光膠片為原料采用硝酸溶解法浸取并制備高純度銀。再以抗壞血酸為還原劑，大分子(PVP)-表面活性劑（TEA）復(fù)合體系為分散劑制備出粒徑可控的球形超細銀粉。結(jié)果表明：在硝酸濃度1.6 mol·L-1，浸取溫度50 ℃，浸取時間10 min，浸取3次條件下，浸取效果好且可得到含量高于99.5%的高純銀。當(dāng)反應(yīng)溫度為20 ℃，硝酸銀溶液pH值為8，硝酸銀濃度為0.02 mol·L-1，m(PVP)/m(AgNO3)>4.5，m(TEA)/m(AgNO3)=1，可得到粒度均勻、形狀規(guī)則、分散性好、粒徑為0.15 μm左右的球形超細銀粉

    Abstract:

    The high purity silver was leaching-out and prepared using a nitric acid dissolution method from waste photosensitive film. The grain size controllable spherical ultrafine silver was prepared with ascorbic acid as reducing agent, macromolecules (PVP) and surfactant (TEA) as dispersant. The results show that the leaching effect is good, and high-purity 99.5% silver of higher content can be obtained when the concentration of nitric acid is 1.6 mol·L-1, the leaching temperature is 50 oC, and the leaching is 10 min and 3 times. Superfine silver powder of uniform size 0.15 μm, regular shape and good dispersion can be prepared when the reaction temperature is 20 oC, pH value of silver nitrate solution is 8, the concentration of silver nitrate is 0.02 mol·L-1, the m(PVP)/m(AgNO3)>4.5 and m(TEA)/m(AgNO3)=1

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熊潔羽,王國軍,汪 斌,胡秀英.廢感光膠片制備超細銀粉的研究[J].稀有金屬材料與工程,2013,42(10):2157~2162.[Xiong Jieyu, Wang Guojun, Wang Bin, Hu Xiuying. Preparation of Superfine Silver Powder from Waste Photosensitive Film[J]. Rare Metal Materials and Engineering,2013,42(10):2157~2162.]
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  • 收稿日期:2012-09-21
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