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westwolf

木虫 (著名写手)


[交流] 纳米粒子的分散

许多金属催化剂是以纳米粒子方式存在。而且纳米粒子也是制备纳米复合材料等主要组成部分。实际应用中的一个难点是纳米粒子的分散。这里向大家推荐一篇这方面的新文献,希望对您有参考价值。

Reports
General Strategies for Nanoparticle Dispersion
Science 24 March 2006:, Vol. 311. no. 5768, pp. 1740 - 1743
DOI: 10.1126/science.1122225
Michael E. Mackay,* Anish Tuteja, Phillip M. Duxbury, Craig J. Hawker, Brooke Van Horn, Zhibin Guan, Guanghui Chen, R. S. Krishnan

Traditionally the dispersion of particles in polymeric materials has proven difficult and frequently results in phase separation and agglomeration. We show that thermodynamically stable dispersion of nanoparticles into a polymeric liquid is enhanced for systems where the radius of gyration of the linear polymer is greater than the radius of the nanoparticle. Dispersed nanoparticles swell the linear polymer chains, resulting in a polymer radius of gyration that grows with the nanoparticle volume fraction. It is proposed that this entropically unfavorable process is offset by an enthalpy gain due to an increase in molecular contacts at dispersed nanoparticle surfaces as compared with the surfaces of phase-separated nanoparticles. Even when the dispersed state is thermodynamically stable, it may be inaccessible unless the correct processing strategy is adopted, which is particularly important for the case of fullerene dispersion into linear polymers.


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[ Last edited by rabbit7708 on 2007-4-18 at 15:56 ]
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afzou

铜虫 (初入文坛)

我也已经下载了,非常感谢.谢谢
6楼2006-05-22 16:35:07
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watercloud

至尊木虫 (著名写手)

国纳科技酱

0.25

好像是纳米粒子在高分子材料的分散
科普作家,百家匠心计划创作者,知乎海盐计划创作者,百度问一问行业资深答主,扎根空净/新材料/节能环保二十年,用冷静、专业视角给你带来不一样的科学认知
3楼2006-05-22 14:38:59
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guwenxiu

金虫 (正式写手)

0.5

下了,非常感谢!
8楼2006-05-29 22:01:41
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rabbit7708

荣誉版主 (职业作家)

心虫

1


看看喽。不错的东西,学习中!
化学学科——催化专版欢迎您!:) http://emuch.net/bbs/forumdisplay.php?fid=190 常来看看哟!:)
11楼2006-10-15 21:29:47
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