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首页> 外文期刊>Colloids and Surfaces, A. Physicochemical and Engineering Aspects >Constant-current electroosmotic dewatering of superabsorbent hydrogel
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Constant-current electroosmotic dewatering of superabsorbent hydrogel

机译：超吸收水凝胶的恒流电渗脱水

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摘要

The electroosmotic dewatering (EOD) behaviors of gelatinous materials, such as superabsorbent hydro-gels or swelling clay, are discussed. The apparent liquid velocity through the materials can be represented in terms of effective-osmotic, electroosmotic and swelling pressure gradients. Taking the creep deformation of the materials into consideration and assuming that the mechanical properties of the materials can be represented by the Terzaghi-Voigt combined model, the basic differential equation expressing EOD of gelatinous materials is solved. The progress of EOD is represented by an average consolidation ratio U_c as in mechanical expression. The agreement between calculated and experimental U_c is satisfactory when the creep deformation of the material is considered. The disagreement between theory and experiment in the latter part of EOD may be due to the change of the property of hydrogel caused by dissolution of Fe(III) from stainless steel electrode.
机译：讨论了诸如超吸收性水凝胶或膨胀黏土等凝胶状材料的电渗脱水（EOD）行为。通过材料的表观液体速度可以用有效渗透压，电渗压和溶胀压力梯度表示。考虑到材料的蠕变变形，并假设可以用Terzaghi-Voigt组合模型表示材料的机械性能，求解了表示凝胶状材料EOD的基本微分方程。 EOD的进展用机械表达形式的平均固结比U_c表示。当考虑材料的蠕变变形时，计算得出的U_c与实验U_c之间的一致性是令人满意的。 EOD后期的理论与实验之间的分歧可能是由于Fe（III）从不锈钢电极中溶解导致水凝胶性能的变化。

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