Effect of Laminating Pressure on Polymeric Multilayer Nanofibrous Membranes for Liquid Filtration
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Date
2019-04-24
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MDPI
Abstract
In the new century, electrospun nanofibrous webs are widely employed in various
applications due to their specific surface area and porous structure with narrow pore size.
The mechanical properties have a major influence on the applications of nanofiber webs. Lamination
technology is an important method for improving the mechanical strength of nanofiber webs.
In this study, the influence of laminating pressure on the properties of polyacrylonitrile (PAN) and
polyvinylidene fluoride (PVDF) nanofibers/laminate was investigated. Heat-press lamination was
carried out at three different pressures, and the surface morphologies of the multilayer nanofibrous
membranes were observed under an optical microscope. In addition, air permeability, water filtration,
and contact angle experiments were performed to examine the effect of laminating pressure on
the breathability, water permeability and surface wettability of multilayer nanofibrous membranes.
A bursting strength test was developed and applied to measure the maximum bursting pressure of
the nanofibers from the laminated surface. A water filtration test was performed using a cross-flow
unit. Based on the results of the tests, the optimum laminating pressure was determined for both PAN
and PVDF multilayer nanofibrous membranes to prepare suitable microfilters for liquid filtration.
Description
Subject(s)
nanofiber, lamination, water filtration