Immersed in an ionic solution, a network of polyampholytic polyelectrolyte imbibes the solution and swells, resulting in a polyampholytic p H-sensitive hydrogel, which can respond to changes in the surrounding environmental _p H. This paper formulates a continuum field theory for polyampholytic p H-sensitive hydrogels by considering the reaction of hydrogen ions with hydroxide ions, which has been ignored in our previous paper (H.X. Yan, B. Jin, Eur. Phys. J. E 35, 36 (2012)). Comparison with experimental data shows that the proposed continuum field theory, by considering that the reaction of hydrogen ions with hydroxide ions would be more reasonable, can not only give a good qualitative but also a good quantitative prediction of the dependence of swelling on p H and crosslinker. The theory is then applied to study the influence of chain entanglements, salt concentration, uniaxial tension and geometric constraint on mechanical behavior of polyampholytic p H-sensitive hydrogels.
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机译:浸入离子溶液中的聚两性聚电解质网络吸收溶液并溶胀,形成了对两性环境敏感的P H敏感水凝胶,可以响应周围环境_p H的变化。通过考虑氢离子与氢氧根离子的反应来制备敏感的水凝胶,这在我们之前的论文中已被忽略(HX Yan,B. Jin,Eur。Phys。J. E 35,36(2012))。与实验数据的比较表明,通过考虑氢离子与氢氧根离子的反应更为合理,所提出的连续场理论不仅可以提供良好的定性,而且可以很好地定量预测膨胀对p H和H的依赖性。交联剂。然后将该理论用于研究链缠结,盐浓度,单轴张力和几何约束对多ampholytic P H敏感水凝胶的力学行为的影响。
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