Polyelectrolyte Chain(聚电解质链)研究综述
Polyelectrolyte Chain 聚电解质链 - Our findings provide a detailed molecular picture of ion condensation and reveal the severe effect of a few, selective and localized electrostatic interactions on the rigidity of a polyelectrolyte chain. [1] By means of the density functional theory framework (DFT) as well as the molecular dynamic simulations (MD), a polyelectrolyte chain (PE) in the good solvent conditions at thermal equilibrium is studied. [2] In the present work we analyze in details this effect in the case of slowly moving Pearl-Necklace-like Polyelectrolyte Chain of structural charge ZSe, and length L less than the structural length LS = ∣ZS∣bS, constituted by Nb beads separated alternatively by (Nb- 1) strings enclosing Ng groups (or small thermal blobs). [3] Interestingly, further studies demonstrated that the enhancement of water transport was not only dependent on the hydrophilicity of the polyelectrolyte chains, but also influenced by their flexibility in the solvent. [4] It was found that the chlorination process increases the negative charge density of the membrane surface and enlarges the free volumes between the polyelectrolyte chains. [5] The effect of binding strength of counterions with the polyelectrolyte chain to the swelling of polyelectrolyte brushes is studied, by investigating the swelling of both the polycation and polyanion in response to the variation of the salt concentration under the change of counterion's identity. [6] The dynamics of adsorption and desorption of counterions on a polyelectrolyte chain in aqueous solution is studied at a single molecular level. [7] Polyelectrolyte-surfactant interaction used to be studied in dependence on nature of head-group of cationic surfactant and polyelectrolyte chain and their influence on colloidal-chemical parameters of polyelectrolyte-surfactant complexes has been compared. [8] The resulting disjoining pressure shows a crossover to a repulsive regime when the interplate separation gets smaller than the size of the polyelectrolyte chain, followed by an attractive part. [9] As a quantitative measure of the distribution of counterions around the polyelectrolyte chain, we study the radial distribution function between monomers on different polyelectrolytes and the counterions inside the counterion worm surrounding a polymer chain at different concentrations of the divalent salt. [10] In this study, we have performed coarse-grained molecular dynamics simulations to understand the charge-driven self-assembly of spherical nanoparticles grafted with polyelectrolyte chains. [11] The polyelectrolyte chains form a network with nanopores on the ceramic surface and promote the rejection of small molecules such as pharmaceuticals, salts and industrial contaminants, which can otherwise not be eliminated using standard ultrafiltration methods. [12] To pinpoint the mechanism of surface structure formation, the shape factor of two species of polyelectrolyte chains and the pair correlation function between monomers from different polyelectrolyte ligands are analyzed carefully. [13] Bridging events caused by Dy3+ or Y3+ between polyelectrolyte chains largely affected current blockage and dwell time of the translocation events. [14] Polyelectrolyte chains adsorb on the surfaces in a thin charged layer, acting as a nonattractive wall for the bulk solution. [15] FS appears to be chemically stabilized by the interaction with polyelectrolyte chains. [16] In particular, the roles that the applied pH, electric potential gradients, and the grafting density of the polyelectrolyte chains played are examined in detail. [17] In an effort to rationalize our experimental findings we present a theory for the collective dynamics of polyelectrolyte solutions with salt by addressing the coupling between the relaxations of polyelectrolyte chains, counterions from the polymer and added salt, and co-ions from the salt. [18] The quantitative analysis demonstrates that counterion release is the major driving force for adsorption in a process where proteins become multivalent counterions of the polyelectrolyte chains upon adsorption. [19] The polyelectrolyte chains desorb from the bilayers at a very high salt concentration, in a process similar to the well-known destabilization of complexes of oppositely charged polyelectrolytes. [20] Ionic circuits composed of nanopores functionalized with polyelectrolyte chains can operate in aqueous solutions, thus allowing the control of electrical signals and information processing in physiological environments. [21] The swelling response of the gels in solutions of ten different monovalent salts is found to be practically identical indicating that the principal effect of monovalent ions is screening the electrostatic repulsion among the charged groups on the polyelectrolyte chains; i. [22]我们的研究结果提供了离子凝聚的详细分子图像，并揭示了一些选择性和局部静电相互作用对聚电解质链刚性的严重影响。 [1] 通过密度泛函理论框架（DFT）和分子动力学模拟（MD），研究了热平衡条件下的聚电解质链（PE）。 [2] 在目前的工作中，我们详细分析了结构电荷为 ZSe 且长度 L 小于结构长度 LS = ∣ZS∣bS 的缓慢移动的珍珠项链状聚电解质链的这种效应，由 Nb 珠构成，或者由(Nb-1) 串包含 Ng 组（或小热团）。 [3] 有趣的是，进一步的研究表明，水传输的增强不仅取决于聚电解质链的亲水性，而且还受到它们在溶剂中的柔韧性的影响。 [4] 发现氯化过程增加了膜表面的负电荷密度并扩大了聚电解质链之间的自由体积。 [5] 研究了抗衡离子与聚电解质链的结合强度对聚电解质刷溶胀的影响，研究了聚阳离子和聚阴离子在抗衡离子特性变化下响应盐浓度变化的溶胀。 [6] 在单分子水平上研究了水溶液中聚电解质链上抗衡离子的吸附和解吸动力学。 [7] 研究了聚电解质-表面活性剂相互作用依赖于阳离子表面活性剂头基和聚电解质链的性质，并比较了它们对聚电解质-表面活性剂复合物胶体化学参数的影响。 [8] 当板间分离变得小于聚电解质链的大小时，产生的分离压力显示出交叉到排斥状态，然后是吸引部分。 [9] 作为聚电解质链周围抗衡离子分布的定量测量，我们研究了不同聚电解质上的单体与在不同浓度的二价盐下围绕聚合物链的抗衡离子蠕虫内的抗衡离子之间的径向分布函数。 [10] 在这项研究中，我们进行了粗粒度的分子动力学模拟，以了解由聚电解质链接枝的球形纳米粒子的电荷驱动自组装过程。 [11] 聚电解质链在陶瓷表面形成具有纳米孔的网络，并促进对药物、盐和工业污染物等小分子的排斥，否则这些小分子无法使用标准超滤方法消除。 [12] 为了明确表面结构的形成机制，对两种聚电解质链的形状因子和来自不同聚电解质配体的单体之间的对相关函数进行了仔细分析。 [13] 由聚电解质链之间的 Dy3+ 或 Y3+ 引起的桥接事件在很大程度上影响了易位事件的电流阻塞和停留时间。 [14] 聚电解质链吸附在薄带电层的表面上，充当本体溶液的非吸引壁。 [15] FS 似乎通过与聚电解质链的相互作用而化学稳定。 [16] 特别是，详细研究了所施加的 pH 值、电势梯度和聚电解质链的接枝密度所起的作用。 [17] 为了使我们的实验结果合理化，我们通过解决聚电解质链的弛豫、来自聚合物和添加的盐的抗衡离子以及来自盐的共离子之间的耦合，提出了一种聚电解质溶液与盐的集体动力学理论。 [18] 定量分析表明，在蛋白质吸附后成为聚电解质链的多价反离子的过程中，反离子释放是吸附的主要驱动力。 [19] 聚电解质链在非常高的盐浓度下从双层中解吸，这一过程类似于众所周知的带相反电荷的聚电解质复合物的去稳定化过程。 [20] 由用聚电解质链功能化的纳米孔组成的离子电路可以在水溶液中运行，从而允许在生理环境中控制电信号和信息处理。 [21] 发现凝胶在十种不同单价盐溶液中的溶胀响应实际上是相同的，这表明单价离子的主要作用是屏蔽聚电解质链上带电基团之间的静电排斥；一世。 [22]