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首页> 外文期刊>Journal of Applied Polymer Science >Equilibrium swelling of thermo-responsive core-shell microgels
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Equilibrium swelling of thermo-responsive core-shell microgels

机译：热响应核心壳微凝块的平衡肿胀

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摘要

Design of new routes for preparation of hydrogels with fast response and enhanced mechanical and physical properties requires adequate modeling of their swelling. A model is developed for the equilibrium swelling of thermo-responsive gels. A characteristic feature of the model is that it accounts for a strong increase in the elastic moduli above the volume phase transition temperature T-c driven by aggregation of hydrophobic segments into clusters that serve as extra physical bonds between chains. The model is applied to the analysis of swelling diagrams on poly(N-isopropylacrylamide) macroscopic gels, microgel latices, and core-shell microgels with rigid cores. Good agreement is shown between the experimental data and results of simulation. It is demonstrated that the elastic moduli of microgels are higher, while their degrees of swelling in the stress-free state are lower compared with those of macroscopic gels.
机译：设计制备具有快速响应和增强机械和物理性能的水凝胶的新路线需要对其溶胀进行充分的建模。建立了热响应凝胶的平衡溶胀模型。该模型的一个特点是，它解释了在体积相变温度T-c以上的弹性模量的大幅增加，这是由疏水链段聚集成簇，作为链之间的额外物理键驱动的。该模型用于分析聚（N-异丙基丙烯酰胺）宏观凝胶、微凝胶乳液和具有刚性核的核壳微凝胶的溶胀图。实验数据与模拟结果吻合良好。结果表明，与宏观凝胶相比，微凝胶的弹性模量较高，而无应力状态下的膨胀度较低。

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