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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >COLLOIDAL FORCE MEASUREMENTS IN THE PRESENCE OF A POLYELECTROLYTE
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COLLOIDAL FORCE MEASUREMENTS IN THE PRESENCE OF A POLYELECTROLYTE

机译:高分子电解质中的胶体力测量

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We report investigations of the repulsive forces between monodispersed ferrofluid droplets in the presence of a weak polyelectrolyte, poly(acrylic acid) (PAA), using a magnetic chaining technique. Two interesting observations were made during our investigations. At a PAA concentration of 0.01 wt%, a long-range repulsive force profile was observed due to the adsorption of polyelectrolyte onto the droplet, without any irreversible aggregates even at very small inter-droplet spacings. Above a concentration of 0.01 wt% of PAA, formation of irreversible chaining of droplets was observed at short inter-droplet separations due to polyelectrolyte binding or bridging. The onset of binding was also independently confirmed by microscopic observation. [References: 29]
机译:我们使用磁链技术报告了在弱聚电解质,聚丙烯酸(PAA)存在下单分散铁磁流体液滴之间的排斥力的研究。在我们的调查过程中,有两个有趣的发现。在0.01重量%的PAA浓度下,由于聚电解质吸附到液滴上,因此观察到长程排斥力分布,即使在很小的液滴间间距下也没有任何不可逆的聚集体。高于0.01重量%的PAA的浓度,由于聚电解质的结合或桥接,在短的液滴间分离中观察到液滴的不可逆链的形成。结合的发生也通过显微镜观察独立地证实。 [参考:29]

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