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摘 要：选用氯金酸(AuCl3.HCl.4H2O)和聚乙烯醇(PVA)为基本原料，还原生成了纳米金颗粒，研究了氯金酸与聚乙烯醇的反应的动态过程，制备了PVA-Au纳米复合膜，分析了复合膜材料中纳米金颗粒对PVA膜的热稳定性能的影响。结果表明：PVA制备纳米金颗粒到反应2.5小时为宜；PVA与氯金酸的反应是-OH将Au（Ⅲ）还原为Au而转化为=O的过程；DSC和TG图谱表明温度和浓度升高都能提高PVA膜的热稳定性能。 谢谢啦 |
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Miranda6276
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115049853(金币+3,VIP+0):只有这些了，都给你吧，摘要内容又改了，我已经贴出来，麻烦大神去看看吧 6-12 11:58
115049853(金币+3,VIP+0):只有这些了，都给你吧，摘要内容又改了，我已经贴出来，麻烦大神去看看吧 6-12 11:58
| we synthesized gold nanoparticles through the reaction of chloroauric acid (AuCl3.HCl.4H2O) with polyvinyl alcohol (PVA) , and then studied the dynamic process of this reaction . we prepared PVA-Au nano-composite film , analyzed the impact of the size of the gold nanoparticle on the thermal stability of the composite film. The survey indicates that 2.5 hours is the most appropriate time for prparing gold nanoparticles from PVA. when PVA reacts with chloroauric acid, Au（Ⅲ）is reduced to Au,while hydroxyl group (-OH) is oxidized to carbonyl group(=O); the diagrams of DSC and TG show that increasing either the reaction temperature or concentration can improve thermal stability of PVA membrane. |
6楼2009-06-12 11:12:15
2楼2009-06-12 08:28:00
pingyamin
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115049853(金币+3,VIP+0):蛮不错，但是又修改摘要内容了，不好意思啊。 6-12 11:56
115049853(金币+3,VIP+0):蛮不错，但是又修改摘要内容了，不好意思啊。 6-12 11:56
| The paper synthesize nano-gold particles through reacting chloroauric acid (AuCl3.HCl.4H2O) with polyvinyl alcohol (PVA) , and then study the dynamic process of this reaction . we produce PVA-Au nano-composite membrane , at the same time we analyze how nano-gold particles impact on the thermal stability of the composite membrane material PVA. The survey indicates that 2.5 hours is the most appropriate time for producing nano-gold particles from PVA; when PVA reacts with chloroauric acid, Au（Ⅲ）is reduced to Au,while hydroxyl group (-OH) is changed into carbonyl group(=O); the diagram of DSC and TG show that increasing temperature and concentration can improve thermal stability of PVA membrane. |
3楼2009-06-12 09:39:26
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顶！！  |
4楼2009-06-12 09:53:04
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