Preparation of Poly(Ionic Liquid) Microbeads via Cooling-Assisted Phase Separation Method,Macromolecular Rapid Communications

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Preparation of Poly(Ionic Liquid) Microbeads via Cooling-Assisted Phase Separation Method
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2021-07-19 , DOI: 10.1002/marc.202100275
Qi Lei _{1,

2} , Jia Zhao _{1,

2} , Fang He ₂ , Xiaopeng Zhao ₂ , Jianbo Yin _{1,

2}

Affiliation

A simple and large-scale non-chemical preparation of uniform poly(ionic liquid) (PIL) microbeads via a cooling-assisted phase separation (CAPS) method is reported. For this method, PIL bulk is dissolved to form a saturated solution in a mixed solvent composed of good solvent and non-solvent at a relatively high temperature. Then, the uniform PIL microbeads are prepared by cooling the solution to room temperature or a lower temperature in the absence of stabilizer. The size of microbeads can be controlled by adjusting the preparation parameters, including PIL concentration, cooling rate, and agitation state. The scale of preparation can be up to 10 g, and the yield of PIL microbeads is more than 70% or 88% when the solution is cooled to room temperature or 0 °C, respectively. The formation mechanism of PIL microbeads is discussed by tracing the nucleation and growth process by the transmittance of light of the solution during cooling. The application of this CAPS method to other polymer microbeads preparation is finally discussed by choosing different good solvent and non-solvent.

中文翻译：

冷却辅助相分离法制备聚（离子液体）微珠

报道了一种通过冷却辅助相分离 (CAPS) 方法简单、大规模地非化学制备均匀聚 (离子液体) (PIL) 微珠的方法。对于这种方法，PIL本体在相对较高的温度下溶解在由良溶剂和非溶剂组成的混合溶剂中形成饱和溶液。然后，在没有稳定剂的情况下，通过将溶液冷却到室温或更低的温度来制备均匀的 PIL 微珠。微珠的大小可以通过调整制备参数来控制，包括 PIL 浓度、冷却速度和搅拌状态。制备规模可达10 g，当溶液冷却至室温或0°C时，PIL微珠的产率分别超过70%或88%。通过在冷却过程中溶液的透光率来追踪成核和生长过程，讨论了PIL微珠的形成机制。最后通过选择不同的良溶剂和非溶剂讨论了这种CAPS方法在其他聚合物微珠制备中的应用。

更新日期：2021-09-07

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