Interfacial Behavior of Aqueous Two-Phase Systems Based on Linear and Hyperbranched Polymers
Interfacial Behavior of Aqueous Two-Phase Systems Based on Linear and Hyperbranched Polymers
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基于线性和超支化聚合物的水性两相体系的界面行为
DOI：
10.1021/acs.jced.7b01001
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发表时间：
2018
影响因子：
--
通讯作者：
Zeiner
中科院分区：
文献类型：
--
作者：
Kulaguin Chicaroux;Zeiner
在这项工作中，两个不同的双水相系统（ATPS）的界面行为进行了分析。一种ATPS通过将聚乙二醇（PEG）和葡聚糖T40溶解在水中形成，并且第二种ATPS通过超支化聚酯酰胺（HB）和葡聚糖T40形成。对两种ATPS的界面行为进行了实验和理论研究。作为一个热力学模型，晶格集团理论与晶格Wertheim模型相结合。该热力学模型与密度梯度理论相结合，模拟界面性质。结果发现，通过旋转滴法测量的含有HB的ATPS的界面张力低于含有PEG的ATPS的界面张力。此外，相形成组分在界面上的传质进行了测量和建模。为了测量传质，使用Nitsch池。采用非稳态密度梯度理论对传质过程进行了模拟。结果表明，葡聚糖的淌度系数可以从一个体系转移到另一个体系。
In this work, the interfacial behavior of two different aqueous two-phase systems (ATPSs) was analyzed. One ATPS is formed by the dissolution of polyethylene glycol (PEG) and dextran T40 in water, and the second ATPS is formed by a hyperbranched polyesteramide (HB) and dextran T40. The interfacial behavior of both ATPSs was investigated experimentally and theoretically. As a thermodynamic model, the lattice cluster theory combined with a lattice Wertheim model was used. This thermodynamic model was combined with density gradient theory to model the interfacial properties. It was found that the interfacial tension, which was measured by the spinning drop method, of the ATPS containing the HB was lower than the interfacial tension of the ATPS containing the PEG. Moreover, the mass transfer of the phase forming components across the interface was measured and modeled. To measure the mass transfer, a Nitsch cell was used. The mass transfer was modeled by the instationary density gradient theory. It was found that the mobility coefficient of dextran could be transferred from one system to the other one.