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首页> 外文期刊>RSC Advances >Control of interface interactions between natural rubber and solid surfaces through charge effects: an AFM study in force spectroscopic mode
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Control of interface interactions between natural rubber and solid surfaces through charge effects: an AFM study in force spectroscopic mode

机译：通过电荷效应控制天然橡胶和固体表面之间的界面相互作用：用于力量光谱模式的AFM研究

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摘要

This work presents a detailed investigation of interface interactions between natural rubber (NR) particles and solid surfaces in aqueous mediumat high ionic strength (0.1 M) using AFM in fast force spectroscopy mode. In this study, an original method for fixing the NR on the substrate was developed. This avoided the usual perturbations common in standard immobilization techniques. We proved that the adhesion process of the NR is monitored by slight changes in the surface charge state of the contacting solid surfaces made of silicon oxide or silicon nitride. The results were interpreted using Dynamic Force Spectroscopy theory, with the introduction of a supplementary term describing the electrostatic energy. Furthermore, these experiments revealed that adhesion between NR and tip was time dependent in a cumulative process. In addition, an increase of the adhesion between NR and AFM tip with the size of the rubber particles was measured. This was related to the higher concentration in lipids versus proteins for larger NR particles. These results are of great importance both for practical applications in solution-based industrial processes and to the fundamental knowledge of adhesion process involved for biopolymers or living cells.
机译：该工作介绍了在快速力光谱模式中使用AFM在水中介质高离子强度（0.1μm）中的天然橡胶（NR）颗粒和固体表面之间的界面相互作用的详细研究。在该研究中，开发了一种用于固定基板上NR的原始方法。这避免了标准固定技术中常见的通常扰动。我们证明，通过由氧化硅或氮化硅制成的接触固体表面的表面电荷状态的微小变化来监测NR的粘合过程。使用动态力光谱理论解释结果，引入了描述静电能量的补充术语。此外，这些实验表明，NR和尖端之间的粘合性依赖于累积过程。另外，测量Nr和AFM尖端之间的粘附性的增加，其尺寸为橡胶颗粒的尺寸。这与脂质较高的浓度与蛋白质较大的NR颗粒有关。这些结果对于基于溶液的工业过程中的实际应用以及对生物聚合物或活细胞所涉及的粘合过程的基本知识来说都非常重要。

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  • 来源
    《RSC Advances》 |2017年第69期|共16页
  • 作者

    Chan Alan Jenkin; Sarkar Preetha; Gaboriaud Fabien; Fontaine-Aupart Marie-Pierre; Marliere Christian;

  • 作者单位

    Univ Paris 11 CNRS ISMO Batiment 520 Rue Andre Riviere F-91405 Orsay France;

    Indian Inst Technol Bombay Maharashtra India;

    Mfg Francaise Pneumat Michelin F-63040 Clermont Ferrand 9 France;

    Univ Paris 11 CNRS ISMO Batiment 520 Rue Andre Riviere F-91405 Orsay France;

    Univ Paris 11 CNRS ISMO Batiment 520 Rue Andre Riviere F-91405 Orsay France;

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  • 正文语种 eng
  • 中图分类 化学;
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