Fabrication and characterization of novel high-performance fluorinated polyimides with xanthene pendent architecture: Study of thermal, photophysical, antibacterial and heavy metal ion adsorption behavior

Amininasab, S. Mojtaba; Esmaili, Soheila; Taghavi, Mehdi; Shami, Zahed

doi:10.1016/j.jfluchem.2016.10.010

Cited by 23 publications

(10 citation statements)

References 48 publications

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“…But the aromatic groups, as well as azomethine and ether linkages in the pendent group are able to retain high thermal stability without any loss . It is confirmed that the presence of alkyl pendent groups in the polyimides cause the deterioration of thermal properties but bulky or long aryl side chains can retain those good heat resistant properties . As the percentage of nanofiller increases decomposition temperature increases because of the high thermal stability imparted by the silica which also acts as the heat sink absorbing heat there by inhibiting the decomposition .…”

Section: Resultsmentioning

confidence: 84%

“…This excellent solubility of PIs in these high boiling solvents is due to presence of long and bulky pendent group in each diamine units which reduce the inter chain interaction and coplanarity to inhibit the close packing. Thus the solvent molecules can diffuse in to the increased free volume, penetrating the polyimide matrix to ease the solubility . And also the introduction of the flexible ketone linkages into the polymer backbone improves the internal segmental rotation there by enhancing the solubility and the processability of polyimide.…”

Section: Resultsmentioning

confidence: 99%

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Synthesis and characterization of flexible/stretchable polyimide having long/bulky aryl pendent group and polyimide/silicon dioxide nanocomposites.

et al. 2018

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A new diamine monomer having ether and azomethine linkages in the long pendent group was synthesized. New polyimide was prepared by reacting the new diamine with BTDA and nanocomposites were prepared with silicon dioxide as nanofiller. SEM analysis shows a uniform distribution of the nanopowder in the polyimide matrix. TGA shows that the polyimide and nanocomposites have good thermal stability with the T10% values varying between 440 and 458°C. DSC analysis shows Tg values between 210 and 230°C. The neat polyimide shows high elongation at break and stretchability (260%) but low tensile strength. The nanocomposites of polyimide show lower elongation at break but have improved tensile strength. The chemically imidised polyimide shows good solubility in solvents like N, N‐dimethyl formamide, N, N‐dimethyl acetamide, and N‐methyl 2‐pyrrollidone. POLYM. COMPOS., 40:832–843, 2019. © 2018 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 84%

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of flexible/stretchable polyimide having long/bulky aryl pendent group and polyimide/silicon dioxide nanocomposites.

et al. 2018

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“…Such fluorescence spectral features are generally due to CT interactions between imide and amine moieties. 35,36…”

Section: Resultsmentioning

confidence: 99%

Photoconductive polyimides derived from a novel imidazole-containing diamine

Jeong

Tapaswi

Kambara

et al. 2019

High Performance Polymers

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A new diamine containing an imidazole structure, 4,4′-(4,5-diphenyl-1H-imidazole-1,2-diyl)dianiline (DIMA), was synthesized to prepare photoconductive polyimides (PIs) with four types of dianhydrides such as 3,3′,4,4′-biphenyltetracarboxylic dianhydride, 4,4′-oxyduphthalic anhydride, 4,4′-(hexafluoroisopropylidene) diphthalic anhydride, and cyclobutane-1,2,3,4,-tetracarboxylic dianhydride, based on the fact that the imidazole ring is a useful n-type block with high electron-donating property and good thermal stability. The imidazole-containing diamine possesses high electron-donating properties due to the lone pair electrons at nitrogen, which affords a high hole-transport property. All the PIs prepared from DIMA were amorphous due to the large side group and kink structure of the diamine, optically transparent (transmittances of 92–98% at 450 nm), and exhibited high thermal stability (10% weight loss temperatures ranged 453–558°C).

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“…Then, the solvent was removed and the roughly brown solid was washed with distilled water and dried for 24 h in a vacuum oven at 60°C. 5…”

Section: Methodsmentioning

confidence: 99%

“…However, adding aromatic rings to their backbone or side groups will also improve their thermal stability. 5,6 Aromatic PIs have high glass transition temperature ( T g ) and low solubility in most organic solvents due to the strong interaction between their chains and rigid structure which make their processing very difficult. 7,8 Therefore, many researches have been carried out to modify the chemical structure of PIs.…”

Section: Introductionmentioning

confidence: 99%

High-performance polyimides based on pyridine and xanthene pendant groups; synthesis, characterization, photoactivity, thermal, antibacterial, and Cr(VI) ion adsorption properties

Amininasab

Esmaili

Shami

2019

High Performance Polymers

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A group of new polyimides (PIs) containing xanthene bulky groups and heterocyclic pyridine ring were synthesized by polycondensation reaction by using new symmetric and asymmetric diamines with available dianhydrides. The prepared diamines and PIs were characterized by Fourier transform infrared, elemental analysis, and proton nuclear magnetic resonance spectroscopy and carbon nuclear magnetic resonance spectroscopy. The PIs have desirable solubility in common aprotic solvents like dimethyl sulfoxide, N-methyl-2-pyrrolidone, dimethylacetamide, and pyridine as a less polar solvent. The PIs with inherent viscosities in the range of 0.51–0.72 dL/g were amorphous in nature, showed glass transition temperatures ( Tgs) of about 270–300°C, and 10% weight loss at temperatures 384–443°C. They showed fluorescence emission (quantum yield 7–12%) due to the presence of xanthene and pyridine groups in their structure. The prepared PIs showed tensile strength of 81–91 MPa with elongation at break of 19–23%. The antibacterial properties of the PIs against Gram negative and Gram positive bacteria and funguses were investigated. Also, a membrane of PI prepared by electrospinning method was used for the removal of different concentrations of Cr(VI) from aqueous solutions.

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Fabrication and characterization of novel high-performance fluorinated polyimides with xanthene pendent architecture: Study of thermal, photophysical, antibacterial and heavy metal ion adsorption behavior

Cited by 23 publications

References 48 publications

Synthesis and characterization of flexible/stretchable polyimide having long/bulky aryl pendent group and polyimide/silicon dioxide nanocomposites.

Synthesis and characterization of flexible/stretchable polyimide having long/bulky aryl pendent group and polyimide/silicon dioxide nanocomposites.

Photoconductive polyimides derived from a novel imidazole-containing diamine

High-performance polyimides based on pyridine and xanthene pendant groups; synthesis, characterization, photoactivity, thermal, antibacterial, and Cr(VI) ion adsorption properties

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