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首页> 外文期刊>Transport in Porous Media >Modelling and Experimental Characterization of Unsaturated Flow in Absorbent and Swelling Porous Media: Material Characterization
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Modelling and Experimental Characterization of Unsaturated Flow in Absorbent and Swelling Porous Media: Material Characterization

机译:非饱和流动在吸收剂和溶胀多孔介质中的模拟与实验表征:材料表征

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摘要

A comprehensive experimental protocol is presented for the characterization of physico-chemical and morphological properties of absorbent hygiene products (AHPs), composite materials, mainly made of super absorbent polymer (SAP) granules blended with cellulose fibres (fluff). The protocol is based on a combination of experimental methods for the characterization of the material properties varying SAP/fluff ratio (SFR): absorption rate, porosity, hydraulic conductivity, retention model and swelling. Major findings were that: (1) liquid absorption rate by the SAP particles was nonlinear; (2) the hydraulic conductivity could be expressed as a function of the porosity of the composite medium for any sample and liquid uptake; and (3) the retention model showed moderate variability with SFR, in the range investigated. Experimental results have been used to determine the constitutive equations for the multiphase flow model developed in the literature (Diersch et al. in Theory Transp Porous Media 83:437-464, 2010. 10.1007/s11242-009-9454-6) for the prediction of the performance of AHPs during cycles of imbibition and drainage (Chem Eng Sci 224:115765, 2020. 10.1016/j.ces.2020.115765).
机译:提出了一种综合实验方案,用于表征吸收性卫生产品(AHPS),复合材料的形态学性质,主要由用纤维素纤维(绒毛)混合的超吸收性聚合物(SAP)颗粒制成。该方案基于实验方法的组合,用于表征材料特性不同的SAP /绒毛比(SFR):吸收速率,孔隙率,液压导电性,保留模型和肿胀。主要研究结果是:(1)SAP颗粒的液体吸收率是非线性的; (2)液压导电率可以表示为复合介质的孔隙率,用于任何样品和液体吸收; (3)保留模型与SFR显示出中等的可变性,在调查范围内。实验结果已被用于确定文献中开发的多相流模型的组成方程(Diersch等人。在理论转运多孔介质83:437-464,1010.10.1007 / s11242-009-9454-6)中的预测在吸收和排水周期期间AHP的性能(Chem Eng SCI 224:115765,2020 .1016 / J.CES.2020.115765)。

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