Synthesis of AB (n) -type colloidal molecules by polymerization-induced particle-assembly (PIPA).
Synthesis of AB (n) -type colloidal molecules by polymerization-induced particle-assembly (PIPA).
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通过聚合诱导颗粒组装 (PIPA) 合成 ABn 型胶体分子
DOI：
10.1039/d0sc00219d
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发表时间：
2020-01-28
期刊：
影响因子：
8.4
通讯作者：
Yuan J
中科院分区：
文献类型：
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作者：
Li D;Chen X;Zeng M;Ji J;Wang Y;Yang Z;Yuan J
胶体分子的常规合成主要依赖于基于颗粒的片状结构单元的自组装。然而，通过各向同性胶体亚基的自组装直接进入CM仍然具有挑战性。在这里，我们报告的大规模生产ABn型CM的聚合诱导粒子组装（PIPA），使用线性ABC三嵌段聚合系统。从二嵌段共聚物球开始，在第三嵌段的聚合期间原位发生球的缔合。第三块聚集成吸引域，将球体连接成CM。CM的稳定性得到保证，只要转换被限制在ca。50%，pH值很低。ABn型CM（n = 2-6）的化合价由聚合物嵌段的体积比决定。通过调节体积比，得到78.5%的线性AB 2型CM。我们证明了聚合诱导的粒子组装对于ABn型CM（50 g L−1）的可扩展制造是成功的，并且可以很容易地扩展到非常不同的三嵌段三元共聚物，用于广泛的应用。使用各向同性二嵌段共聚物球，聚合诱导的粒子组装直接产生胶体分子。
Conventional synthesis of colloidal molecules (CMs) mainly depends on particle-based self-assembly of patchy building blocks. However, direct access to CMs by the self-assembly of isotropic colloidal subunits remains challenging. Here, we report the mass production of ABn-type CMs by polymerization-induced particle-assembly (PIPA), using a linear ABC triblock terpolymer system. Starting from diblock copolymer spheres, the association of spheres takes place in situ during the polymerization of the third block. The third blocks aggregate into attractive domains, which connect spheres into CMs. The stability of CMs is ensured, as long as the conversions are limited to ca. 50%, and the pH is low. The valence of ABn-type CMs (n = 2–6) is determined by the volume ratio of the polymer blocks. By tuning the volume ratio, 78.5% linear AB2-type CMs are yielded. We demonstrate that polymerization-induced particle-assembly is successful for the scalable fabrication of ABn-type CMs (50 g L−1), and can be easily extended to vastly different triblock terpolymers, for a wide range of applications. Using isotropic diblock copolymer spheres, polymerization-induced particle-assembly directly produces colloidal molecules.
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