Synthesis and electrokinetics of cationic spherical nanoparticles in salt-free non-polar media.
Synthesis and electrokinetics of cationic spherical nanoparticles in salt-free non-polar media.
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DOI：
10.1039/c7sc03334f
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发表时间：
2018-01-28
期刊：
影响因子：
8.4
通讯作者：
Armes SP
中科院分区：
文献类型：
--
作者：
Smith GN;Mears LLE;Rogers SE;Armes SP
在无盐非极性介质中制备的阳离子空间稳定的二嵌段共聚物纳米颗粒的电动力学取决于电荷是否位于稳定剂壳或纳米颗粒核中。采用聚合诱导自组装（比萨）技术，在正十二烷中制备了阳离子二嵌段共聚物纳米粒子。先前报道的聚（甲基丙烯酸硬脂酯）-聚（甲基丙烯酸苄酯）（PSMA-PBzMA）比萨制剂（Chem. Sci. 2016，7，5078-5090）通过统计共聚油溶性阳离子甲基丙烯酸单体，四[3，5-双（三氟甲基）苯基]硼酸（2-（甲基丙烯酰氧基）乙基）三甲基铵与SMA或BzMA来改性，以产生带电壳或带电核纳米颗粒。的电动力学进行了研究，作为一个功能的许多变量（体积函数，粒径，溶剂粘度，和每链的离子数的函数）。这些数据与通常在无盐介质中观察到的由反离子缩合控制的电泳一致。然而，有几个有趣的和意想不到的感兴趣的特征。特别地，带电壳纳米颗粒具有比等效带电核纳米颗粒更低的电泳迁移率，并且电泳迁移率的大小随着壳层中阳离子稳定剂链的分数降低而增加。这些结果表明，阳离子PSMA-PBzMA球提供了一个有趣的新的例子，电泳纳米粒子在非极性溶剂。此外，他们应该提供一个理想的模型系统，以评估新的电动理论。
The electrokinetics of cationic sterically-stabilized diblock copolymer nanoparticles prepared in salt-free non-polar media depend on whether the charge is located in the stabilizer shell or in the nanoparticle core. Cationic diblock copolymer nanoparticles have been prepared in n-dodecane via polymerization-induced self-assembly (PISA). A previously reported poly(stearyl methacrylate)–poly(benzyl methacrylate) (PSMA–PBzMA) PISA formulation (Chem. Sci. 2016, 7, 5078–5090) was modified by statistically copolymerizing an oil-soluble cationic methacrylic monomer, (2-(methacryloyloxy)ethyl)trimethylammonium tetrakis[3,5-bis(trifluoromethyl)phenyl]borate, with either SMA or BzMA, to produce either charged shell or charged core nanoparticles. The electrokinetics were studied as a function of many variables (function of volume function, particle size, solvent viscosity, and number of ions per chain). These data are consistent with electrophoresis controlled by counterion condensation, which is typically observed in salt-free media. However, there are several interesting and unexpected features of interest. In particular, charged shell nanoparticles have a lower electrophoretic mobility than the equivalent charged core nanoparticles, and the magnitude of the electrophoretic mobility increases as the fraction of cationic stabilizer chains in the shell layer is reduced. These results show that cationic PSMA–PBzMA spheres provide an interesting new example of electrophoretic nanoparticles in non-polar solvents. Moreover, they should provide an ideal model system to evaluate new electrokinetic theories.
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DOI：
10.1002/anie.201609365
发表时间：
2017-02-06
期刊：
Angewandte Chemie (International ed. in English)
影响因子：
--
作者：
Derry MJ;Mykhaylyk OO;Armes SP
通讯作者：
Armes SP
DOI：
10.1021/j150451a002
发表时间：
1947-01-01
期刊：
JOURNAL OF PHYSICAL AND COLLOID CHEMISTRY
影响因子：
--
作者：
DEBYE, P
通讯作者：
DEBYE, P
影响因子：
2.4
作者：
Einstein, A
通讯作者：
Einstein, A
影响因子：
--
作者：
Charbonnier, Antoine;Brochon, Cyril;Hadziioannou, Georges
通讯作者：
Hadziioannou, Georges
DOI：
10.1016/0166-6622(86)80187-1
发表时间：
1986-01-01
期刊：
COLLOIDS AND SURFACES
影响因子：
--
作者：
ANTL, L;GOODWIN, JW;WATERS, JA
通讯作者：
WATERS, JA