Modeling and on-line measurement of the surface potential of electrospun membranes for the control of the fiber diameter and the pore size

POLYMER

卷:200

Article

Liang, Meng¹  Hebraud, Anne¹  Schlatter, Guy¹ 

[1] Univ Strasbourg, Inst Chim & Proc Energie Environm & Sante, CNRS UMR 7515, ICPEES, 25 Rue Becquerel, F-67087 Strasbourg 2, France

关键词: Electrospinning;    Modeling;    Fibrous morphology;   

DOI  :  10.1016/j.polymer.2020.122576

来源: Elsevier

【 摘 要 】

Electrospinning is a widespread technology enabling the fabrication of nanofibrous materials for a wide range of applications, some of them on an industrial scale. It is shown that the online measurement of the surface potential V located over the nanofibrous membrane gives useful information on the ongoing process and on the local fibrous morphology. A model is proposed to describe the kinetics of the evolution of V during electrospinning and its decay once the production is stopped. In the case of poly(lactic acid) nanofibers, whatever the tested processing conditions, the surface potential is shown to rely on the fiber diameter and the inter-fibers pore size. A scaling law is proposed phi(f) proportional to [tau/dV/dt](0,21) showing that the fiber diameter phi(f) is a function of the time tau, characteristic of the initial behavior of the surface potential, and the slope dV/dt measured at the steady state. In combination with the current measurement, it is an efficient and robust method for the online monitoring of the process of electrospinning. Furthermore, the method gives information on the residual charges stored in the fibrous material which is an important feature for the elaboration, by electrospinning in-situ charging, of electrets for filtering applications.

【 授权许可】

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