Destabilization of Colloidal Suspensions by Multivalent Ions and Polyelectrolytes: From Screening to Overcharging

Istvan Szilagyi; Amin Sadeghpour; and Michal Borkovec

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Destabilization of Colloidal Suspensions by Multivalent Ions and Polyelectrolytes: From Screening to Overcharging

机译：多价离子和聚电解质对胶体悬浮液的破坏作用：从筛选到过度充电

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The destabilization of charged colloidal suspensions isnstudied in the presence of polyelectrolytes and the correspondingnoligomers. Two different systems are investigated, namely, negativelyncharged particles in the presence of polyamines and positively chargednones in the presence of polycarboxylates. Multivalent oligomers of lownvalence destabilize the particles by screening according to the Schulze−nHardy rule. Polyelectrolytes induce destabilization by overcharging.nBoth regimes can be observed for oligomers of intermediate valence.nThe stability data of any valence can be rather well described by thentheory of Derjaguin, Landau, Verwey, and Overbeek (DLVO),nindicating that the interactions are mainly governed by van dernWaals and electrostatic double-layer forces.

机译：在聚电解质和相应的低聚物的存在下，对带电胶体悬浮液的失稳进行了研究。研究了两种不同的系统，即在多胺存在下带负电荷的粒子和在多羧酸盐存在下带正电荷的壬烯。低价的多价低聚物通过根据Schulze-nHardy规则进行筛选来使颗粒不稳定。聚电解质通过过度充电引起不稳定.n可以观察到两种价态的中价低聚物。n任何价态的稳定性数据都可以由Derjaguin，Landau，Verwey和Overbeek（DLVO）的理论很好地描述，表明相互作用主要受控制由van dernWaals和静电双层力产生。

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《Langmuir》 |2012年第15期|6211-6215|共5页
作者
Istvan Szilagyi; Amin Sadeghpour; and Michal Borkovec;
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Department of Inorganic Analytical and Applied Chemistry University of Geneva Sciences II 30 Quai Ernest-Ansermet 1205Geneva Switzerland;

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机译：胶体悬浮液中存在的游离聚电解质的定量，揭示了聚电解质包裹的金纳米颗粒的有毒反应来源
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机译：胶体悬浮液中存在的游离聚电解质的定量揭示了聚电解质包裹的金纳米颗粒的毒性反应来源

Destabilization of Colloidal Suspensions by Multivalent Ions and Polyelectrolytes: From Screening to Overcharging

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