2018
DOI: 10.1021/acs.macromol.8b01436
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Origin of Inconsistency in Experimentally Observed Transition Widths and Critical Flow Rates in Ultrafiltration Studies of Flexible Linear Chains

Abstract: Using special anisotropic membranes of bilayered cylindrical channels, we have experimentally clarified the origin of inconsistency in the transition widths and critical flow rates (q c ) reported in related ultrafiltration studies of flexible linear chains. By studying the retention behavior of linear polystyrene chains passing through the same bilayered ultrafiltration membrane but in different translocation models, we reveal that the interaction among flow fields and the preconfinement effect are responsibl… Show more

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Cited by 9 publications
(26 citation statements)
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“…In addition to the above thermodynamic origin, initially, we also suspected that the flow-induced forced penetration may be the other origin from the dynamic point of view. In our previous studies of polymer translocation through nanopores, we have revealed that the deformability of macromolecules with different architectures is not determined by the chain size but by the entropy penalty. In particular, we have proved that hyperbranched chains with a much larger R h but a lower branching density can enter nanopores more easily. , …”
Section: Further Discussionmentioning
confidence: 78%
“…In addition to the above thermodynamic origin, initially, we also suspected that the flow-induced forced penetration may be the other origin from the dynamic point of view. In our previous studies of polymer translocation through nanopores, we have revealed that the deformability of macromolecules with different architectures is not determined by the chain size but by the entropy penalty. In particular, we have proved that hyperbranched chains with a much larger R h but a lower branching density can enter nanopores more easily. , …”
Section: Further Discussionmentioning
confidence: 78%
“…Namely, Anderson et al 21,85 and Duval et al 22 used the track-etched mica and polycarbonate isotropic membranes in their studies, respectively; instead, a special bilayered AAO anisotropic membrane was used by us. 31,32 Methods of Computational Simulation. Compared with the experiment, the research objects in the simulation study are closer to theoretical models.…”
Section: Progress In Experimental Observation Andmentioning
confidence: 99%
“…In fact, our recent studies clearly showed that the nonideality of the flow field, the preconfinement effect and the capture mode are all important to the transition width. 26,31 The origin can be traced back to the influence on the distribution of chain conformation and energy barrier during translocation.…”
Section: Progress In Experimental Observation Andmentioning
confidence: 99%
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