The chemistry involved in the loading of silver(I) into poly(amic acid) via ion exchange: A metal-ion-induced crosslinking behavior

Qi, Shengli; Wu, Zhanpeng; Wu, Dezhen; Yang, Wantai; Jin, Riguang

doi:10.1016/j.polymer.2008.12.010

Cited by 26 publications

(27 citation statements)

References 40 publications

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“…The chelating resins can be used in the concentration and selective separation of silver ions. Also, the ion exchange resins can be used for silver ions, but the chelating resins are preferred instead of the ion exchange resins because of their selectivity [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a novel dithiooxamide–formaldehyde resin and its application to the adsorption and separation of silver ions

Çelik

Gülfen

Aydın

2010

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 99%

Synthesis of a novel dithiooxamide–formaldehyde resin and its application to the adsorption and separation of silver ions

Çelik

Gülfen

Aydın

2010

Journal of Hazardous Materials

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“…For the silver(I)‐doped PAA films, as shown in Figure 2(B), the evident loss peak at 130°C on tan δ curve indicates that the glass transition of the PAA molecules in the silver(I)‐doped PAA films is ∼ 20°C higher than that in the pure PAA films (110°C). It is suggested that it is the incorporated silver ions that block the motion of the PAA segments by forming physical crosslinking in the ion‐exchange films as demonstrated in our previous work,24 which consequently enhance the glass transition temperature ( T g ) of the PAA molecules.…”

Section: Resultsmentioning

confidence: 77%

“…The ion exchange process of BPADA/ODA PAA in aqueous [Ag(NH 3 ) 2 ] + solution, including the mass changes, silver loading and structural variation before and after ion exchange, was also investigated following the procedures reported in our previous publication 24…”

Section: Methodsmentioning

confidence: 99%

Formation of double‐surface‐silvered polyimide films via a direct ion‐exchange self‐metallization technique: The case of BPADA/ODA and [Ag(NH₃)₂]⁺

Lin

2012

J of Applied Polymer Sci

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Double‐surface‐silvered polyimide (PI) films have been successfully fabricated via a direct ion‐exchange self‐metallization method using silver ammonia complex cation ([Ag(NH3)2]+) as silver resource and bis[4‐(3,4‐dicarboxyphenoxy)phenyl]propane dianhydride/4,4′‐oxydianiline (BPADA/ODA)‐based poly(amic acid) (PAA) as the PI precursor. The alkaline characteristic of the silver precursor dramatically improves the efficiency of the ion exchange and film metallization process. By using an aqueous [Ag(NH3)2]+ solution with a concentration of only 0.01M and an ion‐exchange time of only 5 min, metallized films with desirable performance could be easily obtained by simply heating the silver(I)‐doped PAA films to 300°C. The strong hydrolysis effect of the basic [Ag(NH3)2]+ cations on the flexible and acidic BPADA/ODA PAA chains was observed during the ion exchange process by the quantitative evaluation of the mass loss of PAA matrix. Nevertheless, under the present experimental conditions, the final metallized film essentially retained the basic structural, thermal, and mechanical properties of the pristine PI, which make it a truly applicable material. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

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“…Polyamic acid and modified Polyamic acid films were subjected to Scanning Electron Microscopy for morphological determinations and for identification of the nature and distribution of metallic particles within them (Figures 6 and 7). Figure 6 shows the surface of wet phase inverted Au/Ag-PAA, with a spongelike morphology typically observed in asymmetric, phase inverted membranes described in literature [40,41]. Gold and Silver nanoparticles are well dispersed on the film with an average size of 35 nm for spherical gold nanoparticles and 25 nm for Silver nanoparticles.…”

Section: Surface Morphologymentioning

confidence: 74%

Fabrication of Nanostructured Polyamic Acid Membranes for Antimicrobially Enhanced Water Purification

Kimotho

Noah

Nawiri

et al. 2020

Advances in Polymer Technology

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Water scarcity and quality challenges facing the world can be alleviated by Point-of-Use filtration devices (POU). e use of filtration membranes in POU devices has been limited largely because of membrane fouling, which occurs when suspended solids, microbes, and organic materials are deposited on the surface of filtration membranes significantly decreasing the membrane lifespan, thereby increasing operation costs. ere is need therefore to develop filtration membranes that are devoid of these challenges. In this work, nanotechnology was used to fabricate nanostructured polyamic acid (nPAA) membranes, which can be used for microbial decontamination of water. e PAA was used as support and reducing agent to introduce silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) with antimicrobial properties. e nPAA membranes were fabricated via thermal and wet phase inversion technique and then tested against Escherichia coli and Staphylococcus aureus following standard tests. e resulting nanoparticles exhibited excellent dispersibility and stability as indicated by the color change of the solution and increments of optical density at 415 nm for AgNPs and 520 nm for AuNPs. e wet phase inversion process used produced highly porous, strong, and flexible nPAA membranes, which showed well-dispersed spherical AuNPs and AgNPs whose rough average size was found to be 35 nm and 25 nm, respectively. e AgNPs demonstrated inhibition for both gram positive E. coli and gram negative S. aureus, with a better inhibitory activity against S. aureus. A synergistic enhancement of AgNPs antimicrobial activity upon AuNPs addition was demonstrated. e nPAA membranes can thus be used to remove microbials from water and can hence be used in water purification.

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The chemistry involved in the loading of silver(I) into poly(amic acid) via ion exchange: A metal-ion-induced crosslinking behavior

Cited by 26 publications

References 40 publications

Synthesis of a novel dithiooxamide–formaldehyde resin and its application to the adsorption and separation of silver ions

Synthesis of a novel dithiooxamide–formaldehyde resin and its application to the adsorption and separation of silver ions

Formation of double‐surface‐silvered polyimide films via a direct ion‐exchange self‐metallization technique: The case of BPADA/ODA and [Ag(NH₃)₂]⁺

Fabrication of Nanostructured Polyamic Acid Membranes for Antimicrobially Enhanced Water Purification

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The chemistry involved in the loading of silver(I) into poly(amic acid) via ion exchange: A metal-ion-induced crosslinking behavior

Cited by 26 publications

References 40 publications

Synthesis of a novel dithiooxamide–formaldehyde resin and its application to the adsorption and separation of silver ions

Synthesis of a novel dithiooxamide–formaldehyde resin and its application to the adsorption and separation of silver ions

Formation of double‐surface‐silvered polyimide films via a direct ion‐exchange self‐metallization technique: The case of BPADA/ODA and [Ag(NH3)2]+

Fabrication of Nanostructured Polyamic Acid Membranes for Antimicrobially Enhanced Water Purification

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Product

Resources

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Formation of double‐surface‐silvered polyimide films via a direct ion‐exchange self‐metallization technique: The case of BPADA/ODA and [Ag(NH₃)₂]⁺