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首页> 外文期刊>Polymers >The Construction of an Aqueous Two-Phase System to Solve Weak-Aggregation of Gigaporous Poly(Styrene-Divinyl Benzene) Microspheres
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The Construction of an Aqueous Two-Phase System to Solve Weak-Aggregation of Gigaporous Poly(Styrene-Divinyl Benzene) Microspheres

机译：解决双孔聚苯乙烯-二乙烯基苯微球弱聚集的水两相体系的构建

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Gigaporous poly(styrene-divinyl benzene) microspheres made via the surfactant reverse micelles swelling method had a controllable pore size of 100–500 nm. These microspheres had unique advantages in biomacromolecule separation and enzymes immobilization. However, the obtained microspheres adhered to each other in the preparation process. Though the weak aggregation could be re-dispersed easily by mechanical force, it will be difficult to scale up. By analyzing the formation mechanism of the aggregates, a method was presented to rebuild the interface between the internal aqueous channel and the external continuous phase by constructing an aqueous two-phase system (ATPS). Based on the ATPS, the method of emulsification, stirring speed, and surfactant concentration in oil phase were optimized. Under the optimum condition (screen emulsification method, 120 rpm for polymerization and 55% surfactant), the microspheres with a controllable particle size of 10–40 μm and a pore size of about 150 nm were obtained. This new method could significantly decrease the weak-aggregation of microspheres.
机译：通过表面活性剂反胶束溶胀法制得的巨孔聚（苯乙烯-二乙烯基苯）微球的可控制孔径为100-500 nm。这些微球在生物大分子分离和酶固定方面具有独特的优势。然而，获得的微球在制备过程中彼此粘附。尽管弱聚集可以通过机械力轻松地重新分散，但将很难扩大规模。通过分析聚集体的形成机理，提出了一种通过构建水两相体系（ATPS）重建内部水通道与外部连续相之间的界面的方法。基于ATPS，优化了乳化，搅拌速度和油相中表面活性剂浓度的方法。在最佳条件下（丝网乳化法，聚合速度为120 rpm，表面活性剂含量为55％），制得的微球粒径可控制在10–40μm，孔径约150 nm。这种新方法可以显着减少微球的弱聚集。

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