A facile route to the preparation of mixed matrix polyvinylidene fluoride membranes with in-situ generated polyethyleneimine particles

Kotte, Madhusudhana Rao; Cho, Manki; Diallo, Mamadou S.

doi:10.1016/j.memsci.2013.08.025

Cited by 40 publications

(38 citation statements)

References 39 publications

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“…The membrane preparation procedures were adapted from our previous work [1]. The membranes were prepared using a combined thermally-induced phase separation (TIPS) and non-solvent induced phase separation (NIPS) process.…”

Section: Membrane Preparationmentioning

confidence: 99%

“…A control PVDF membrane and two mixed matrix PVDF membranes with in situ synthesized PAMAM particles (MDP-G0 and MDP-G1) were prepared using the three-step process given below. The recipe used to prepare the mixed matrix membranes (MMMs) was selected to achieve a high particle loading (~50 wt%) based on the results of our previous work on mixed matrix PVDF membranes with in situ synthesized PEI particles [1]. The MDP-G0 and MDP-G1 membranes were prepared using G0-NH 2 and G1-NH 2 PAMAM dendrimers as particle precursors, respectively.…”

Section: Membrane Preparationmentioning

confidence: 99%

“…1 The mass fraction of crosslinked PAMAM particles in each membrane was estimated based on the following assumptions: i) All ECH crosslinker molecules were reacted with the segregated PAMAM molecules by the reaction between epoxy & chloro groups of ECH and primary/secondary amino groups of PAMAM molecules in the dope solutions ( Figure 1B). ii) Each ECH molecule produces one molecule of hydrogen chloride (HCl) following the crosslinking reaction ( Figure 1B).…”

Section: Copper Filtration and Binding Studiesmentioning

confidence: 99%

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Mixed Matrix PVDF Membranes With in Situ Synthesized PAMAM Dendrimer-Like Particles: A New Class of Sorbents for Cu(II) Recovery from Aqueous Solutions by Ultrafiltration

Kotte

Kuvarega

Cho

et al. 2015

Environ. Sci. Technol.

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Advances in industrial ecology, desalination, and resource recovery have established that industrial wastewater, seawater, and brines are important and largely untapped sources of critical metals and elements. A Grand Challenge in metal recovery from industrial wastewater is to design and synthesize high capacity, recyclable and robust chelating ligands with tunable metal ion selectivity that can be efficiently processed into low-energy separation materials and modules. In our efforts to develop high capacity chelating membranes for metal recovery from impaired water, we report a one-pot method for the preparation of a new family of mixed matrix polyvinylidene fluoride (PVDF) membranes with in situ synthesized poly(amidoamine) [PAMAM] particles. The key feature of our new membrane preparation method is the in situ synthesis of PAMAM dendrimer-like particles in the dope solutions prior to membrane casting using low-generation dendrimers (G0 and G1-NH2) with terminal primary amine groups as precursors and epichlorohydrin (ECH) as cross-linker. By using a combined thermally induced phase separation (TIPS) and nonsolvent induced phase separation (NIPS) casting process, we successfully prepared a new family of asymmetric PVDF ultrafiltration membranes with (i) neutral and hydrophilic surface layers of average pore diameters of 22–45 nm, (ii) high loadings (∼48 wt %) of dendrimer-like PAMAM particles with average diameters of ∼1.3–2.4 μm, and (iii) matrices with sponge-like microstructures characteristics of membranes with strong mechanical integrity. Preliminary experiments show that these new mixed matrix PVDF membranes can serve as high capacity sorbents for Cu(II) recovery from aqueous solutions by ultrafiltration.

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Section: Membrane Preparationmentioning

confidence: 99%

Section: Membrane Preparationmentioning

confidence: 99%

Section: Copper Filtration and Binding Studiesmentioning

confidence: 99%

See 1 more Smart Citation

Mixed Matrix PVDF Membranes With in Situ Synthesized PAMAM Dendrimer-Like Particles: A New Class of Sorbents for Cu(II) Recovery from Aqueous Solutions by Ultrafiltration

Kotte

Kuvarega

Cho

et al. 2015

Environ. Sci. Technol.

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“…However, the synthesis of PMNPs requires specialized synthetic procedures including conventional and controlled emulsion, miniemulsion and microemulsion polymerization [14][15][16]. In addition, the preparation of MMMs with functional micro/nanoparticles often involves tedious and lengthy procedures to synthesize, functionalize, purify and disperse the particles that would be needed to produce high quality membrane casting solutions [17].…”

Section: Introductionmentioning

confidence: 99%

“…In a recent article published by the Journal of Membrane Science [17], we described a facile route to the preparation of mixed matrix polyvinylidene fluoride (PVDF) membranes with in situ generated polyethyleneimine (PEI) particles. Preliminary filtration experiments showed that these new MMMs could serve as high capacity weak-base membrane absorbers for proteins such as bovine serum albumin [17].…”

Section: Introductionmentioning

confidence: 99%

A one-pot method for the preparation of mixed matrix polyvinylidene fluoride membranes with in situ synthesized and PEGylated polyethyleneimine particles

Kotte¹,

Hwang²,

Han³

et al. 2015

Journal of Membrane Science

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Beta cyclodextrin modified polyvinylidene fluoride adsorptive mixed matrix membranes for removal of Congo red

Ndlovu

Malatjie

Chabalala

et al. 2022

J of Applied Polymer Sci

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This work reports the adsorptive removal of congo red using as-fabricated polyvinylidene fluoride (PVDF) membranes modified with beta cyclodextrin (β-CD). Diverse techniques were used to characterize the membranes' performance and microstructural and morphological properties. The effect of pH, dye initial concentration, adsorbent dosage, contact time on adsorption efficiency were investigated. Filtration studies were carried out using a deadend cell. The results showed that the introduction of β-CD in membrane matrix improved membrane performance, adsorption, and filtration properties.Bulk porosity increased from 61.46% to 87.55% and contact angle decreased from 84.17 0 to 67.93 0 . Water flux at 1 bar improved from 12.42 to 269.08 L.m À2 . hr À1 . Maximum adsorption for congo red was obtained at pH 7, with PVDF/β-CD membranes removing 96.15% and pristine PVDF removing 54.27% of congo red. The adsorptive removal of congo red was best described by the pseudosecond order kinetics and best fitted the Freundlich isotherm model. According

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A facile route to the preparation of mixed matrix polyvinylidene fluoride membranes with in-situ generated polyethyleneimine particles

Cited by 40 publications

References 39 publications

Mixed Matrix PVDF Membranes With in Situ Synthesized PAMAM Dendrimer-Like Particles: A New Class of Sorbents for Cu(II) Recovery from Aqueous Solutions by Ultrafiltration

Mixed Matrix PVDF Membranes With in Situ Synthesized PAMAM Dendrimer-Like Particles: A New Class of Sorbents for Cu(II) Recovery from Aqueous Solutions by Ultrafiltration

A one-pot method for the preparation of mixed matrix polyvinylidene fluoride membranes with in situ synthesized and PEGylated polyethyleneimine particles

Beta cyclodextrin modified polyvinylidene fluoride adsorptive mixed matrix membranes for removal of Congo red

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