Borisov O V, Polotsky A A, Rud O V, Zhulina E B, Leermakers F A M, Birshtein T M
CNRS, Université de Pau et des Pays de l'Adour UMR 5254, Institut des Sciences Analytiques et de Physico-Chimie, pour l'Environnement et les Matériaux, Pau, France.
Soft Matter. 2014 Apr 7;10(13):2093-101. doi: 10.1039/c3sm53019a.
Dendron brushes are molecular structures built up of treelike macromolecules, with multiple generations of branches, grafted with a root segment to a surface (particle) or to a backbone chain (dendronized polymer) with a sufficiently high grafting density so that the dendrons interact laterally. Recent advances in the theory of dendron brushes are highlighted and complemented by insights from numerical self-consistent field modelling. Our focus is on controversial issues, which are still under debate, such as, the strain distribution in individual dendrons and the appearance of distinct populations with a different extent of stretching for dendrons in planar brushes. We anticipate that dendritic brushes (i) show a strong resistance against bending, which may manifest in a high apparent persistence length of dendronized polymers, and (ii) have an unusually large beneficial effect on the colloidal stability due to the sharp steric repulsive interaction observed when these surface layers are pushed towards the overlap.
树枝状刷是由树状大分子构建而成的分子结构，具有多代分支，通过根段以足够高的接枝密度接枝到表面（颗粒）或主链（树枝状化聚合物）上，从而使树枝状分子发生横向相互作用。本文重点介绍了树枝状刷理论的最新进展，并辅以数值自洽场建模的见解。我们关注的是仍在争论的有争议问题，例如，单个树枝状分子中的应变分布以及平面刷中树枝状分子具有不同拉伸程度的不同群体的出现。我们预计树枝状刷（i）表现出很强的抗弯曲能力，这可能表现为树枝状化聚合物具有较高的表观持久长度，并且（ii）由于当这些表面层被推向重叠时观察到的强烈空间排斥相互作用，对胶体稳定性具有异常大的有益影响。
