Dry-cast process for synthetic microporous membranes: Physico-chemical analyses through morphological studies

Nguyen, Quang Trong; Alaoui, Ouafa Tahiri; Yang, Hu; Mbareck, Chamekh

doi:10.1016/j.memsci.2010.04.022

Cited by 27 publications

(21 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Then, the film is left in air or in a heated oven for a preferential evaporation of the solvent, yielding a phase separation. When the solvent and nonsolvent completely evaporate, the location of nonsolvent in the phase separation process become pores and the porous membrane is obtained . The pore structure is directly affected by the thermodynamic properties of the polymer/solvent/nonsolvent ternary system, and thus, it is important to analyze the phase diagram to achieve a deep understanding on the resultant morphology.…”

Section: Resultsmentioning

confidence: 99%

“…The ternary phase diagram of the mixture of PVDF/DMF/Water was investigated as shown in the Figure . The gelation curve (labeled as square) corresponds to the initial composition of the semi‐crystalline polymer solution for solid‐liquid phase separation during the dry‐cast process . On the left side of gelation curve, the mixture is a homogenous fluid; while on the right side, the mixture becomes gel due to the crystallization of PVDF and shows high viscosity.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Construction of porous coating layer and electrochemical performances of the corresponding modified polyethylene separators for lithium ion batteries

Fang

Shi

et al. 2014

J of Applied Polymer Sci

View full text Add to dashboard Cite

To effectively improve the affinity of polyethylene (PE) separators with liquid electrolyte without causing a serious pore blockage and to develop a more suitable technology for the industrial production process, porous polyvinylidene fluoride (PVDF) layer‐coated PE separators are prepared by the dip‐coating method followed by a dry‐cast process. Different from previous investigations, a less volatile solvent and a relatively volatile nonsolvent are used to yield a preferable pore structure. A brief introduction on the pore formation mechanism during the dry‐cast process is provided. The pore structure of coating layer is found to be successfully controlled by changing evaporation temperature, nonsolvent content, and PVDF concentration. The porous PVDF coating layer‐modified separators show better affinity with liquid electrolyte and thermal stability. Especially, the ionic conductivity of the modified separator/liquid electrolyte system with a suitable porous coating layer on the separator could reach two times as that of PE separator/liquid electrolyte system, and the cell assembled with modified PE separator shows better cycle performances. This modification process is proved to be a facile, controllable, and effective method for PE separator modification. Meanwhile, this work could provide some theoretical and technical guidance for the production process. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 41036.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Construction of porous coating layer and electrochemical performances of the corresponding modified polyethylene separators for lithium ion batteries

Fang

Shi

et al. 2014

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…The porosity of the nylon thin films (ε) was calculated according to the equation:

normalε = \frac{V_{A} - V_{E}}{V_{A}} x 100 %

where V A is the thin film volume that is calculated based on thin film thickness by using microthickness gauge (Mitutoyo 7301, Japan) and surface area (1.5 × 1.5 cm 2 ). The sample was then ovendried to eliminate water vapor contaminant in the nylon film.…”

Section: Methodsmentioning

confidence: 99%

Morphological characteristics of polymeric nylon‐6 film as biological recognition interface for electrochemical immunosensor application

Shaimi

Low

2018

J of Applied Polymer Sci

View full text Add to dashboard Cite

The present study elucidates the morphology characteristic of nylon‐6 as protein immobilization film and their influences in biological recognition interface for a single‐use electrochemical immunosensor. A basic requirement of this polymer platform is to allow the testing analyte [conductive polyaniline‐Fe2O3‐glutaraldehyde‐conjugated‐N‐hydroxysuccinimidobiotin (PANI‐Fe2O3‐GA‐b‐NHS)] to access to the immobilized capture reagent [bovine serum albumin (BSA)] on a surface of the nylon‐6 film. As an immunoassay, the biochemical reaction between PANI‐Fe2O3‐GA‐b‐NHS and BSA takes place on a surface of the nylon‐6 support film, which then translated into measurable resistance signal through pulse‐mode measurement. The in‐house developed nylon‐6 film, N‐16B, with 16 wt % nylon polymer and methanol as nonsolvent had demonstrated the fastest lateral wicking speed (1.07 mm s−1) and excellent protein immobilization capacity (1650 ± 85.84 μg cm−3), leading to the higher electrical current signal with a minimal resistance of electrochemical responses (0.57 ± 0.04 MΩ). This work reflects the importance of the physical characteristics of the nylon‐6 film that determines the sensitivity and effectiveness of an immunosensor. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46741.

show abstract

“…Actually, this does not concern primary interatomic bonding (here, covalent bonding), but more probably secondary bonding or van der Waal interactions. NMP is a better solvent for PVDF than acetone, which can be easily verified by (i) using the Hansen theory through the value of the solubility parameters [1,39,40], (ii) trying to dissolve 22 wt% PVDF in pure acetone, or (iii) considering the possibilities for H-bonds between the polymer and the solvent. It was tried to solubilize PVDF in pure acetone, but after 24 h at 48 8C, polymer granules remained in the flask.…”

Section: Influence Of Solvent Composition and Nonsolvent Activity On mentioning

confidence: 99%

“…Polyvinylidene fluoride (PVDF) membranes are commonly prepared by phase separation techniques, including dry cast process [1], temperature-induced phase separation (TIPS) process [2], liquid-induced phase separation (LIPS) process [3], vaporinduced phase separation (VIPS) process [4] or a combination of processes such as the so-called nonsolvent assisted thermally induced phase separation (Nat-ips) process [5]. This variety of choices implies that many different structures can be obtained, from dense to porous morphologies.…”

Section: Introductionmentioning

confidence: 99%

Influence of solvent composition and non-solvent activity on the crystalline morphology of PVDF membranes prepared by VIPS process and on their arising mechanical properties

Venault

Chang

et al. 2014

Journal of the Taiwan Institute of Chemical Engineers

View full text Add to dashboard Cite

Dry-cast process for synthetic microporous membranes: Physico-chemical analyses through morphological studies

Cited by 27 publications

References 34 publications

Construction of porous coating layer and electrochemical performances of the corresponding modified polyethylene separators for lithium ion batteries

Construction of porous coating layer and electrochemical performances of the corresponding modified polyethylene separators for lithium ion batteries

Morphological characteristics of polymeric nylon‐6 film as biological recognition interface for electrochemical immunosensor application

Influence of solvent composition and non-solvent activity on the crystalline morphology of PVDF membranes prepared by VIPS process and on their arising mechanical properties

Contact Info

Product

Resources

About