Synthesis and morphology of new functional polyimide/titania nano hybrid materials

Seyedjamali, Hojjat; Pirisedigh, Azadeh

doi:10.1007/s10853-011-5630-5

Cited by 25 publications

(10 citation statements)

References 38 publications

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“…These amplified interactions lead to the creation of titania particles with more homogeneous distribution and round shapes. In comparison with our previous reports [23,24], it may be concluded that the L-leucine fractions induced more flexibility into the polymer backbone with regard to Lphenylalanine. Probably the phenyl ring existing in the structure of L-phenylalanine increases the rigidity of polymer backbone, while L-leucine with two diastereotopic methyl groups comprises more steric hindrance and thus induces more flexibility to the polymer ground due to the more asymmetric disposition.…”

Section: Microscopic Morphologycontrasting

confidence: 60%

“…Then, in a separate work, L-phenylalanine was used where it located in the structure of pendant groups [24]. A comparison between our former studies unexpectedly showed that greater particles size was observed when bulky pendant groups-containing Lphenylalanine fractions-existed in the structure of polymer matrix.…”

Section: Introductionmentioning

confidence: 91%

“…4 which confirms the enhancement in the adsorption efficiency as a result of the increase in titania percentages. It may be discussed by either more aggregation of titania nanoparticles or creation of titanium ion-acac complex [6,[23][24][25]. Of course, the complex mechanism may be canceled following the gelation step.…”

Section: Uv-vis Spectroscopymentioning

confidence: 99%

“…5) did not show crystalline region, probably due to the existence of bulky pendant groups in the structure of polymer matrix which disrupt the arrangements of polymer chains and obligate them to be amorphous. Predictably, the described procedure was directed to the formation of amorphous titania particles too [23,24,26].…”

Section: Xrd Patternsmentioning

confidence: 99%

“…Likewise, the fabrication of nanocomposites containing natural fractions is promising. Recently, we have reported the full synthesis and characterization of new PI/titania nanohybrid materials containing L-amino acid fractions in the main chain of polymer matrix as well as pendant groups [23,24].…”

Section: Introductionmentioning

confidence: 99%

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Well-dispersed polyimide/TiO2 nanocomposites: in situ sol–gel fabrication and morphological study

Seyedjamali

Pirisedigh

2012

Colloid Polym Sci

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In the presented study, 3,5-diamino-N-(4-methyl-1-oxo-1-(phenylamino)pentan-2-yl)benzamide (V) as a new diamine monomer is synthesized and fully characterized by means of FT-IR, 1 H-NMR, 13 C-NMR, and elemental analysis techniques. The stated diamine is used for the sol-gel fabrication of a series of polyimide (PI)/titania nanohybrid films with various titania percentages. The special design of diamine monomer containing bulky pendant group increased the flexibility of resulted PI matrixes. On the other hand, the ability to construct strong organic/inorganic Hbond lattice has led to the effective surrounding of nanoparticles by PI grounds and thus the well-dispersed quite spherical nanoparticles were created via a sol-gel procedure. The obtained nanocomposites showed high thermal stability and UV-vis absorption efficiency. The X-ray diffraction experiments confirmed the titania nanoparticles to be amorphous.

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Section: Microscopic Morphologycontrasting

confidence: 60%

Section: Introductionmentioning

confidence: 91%

Section: Uv-vis Spectroscopymentioning

confidence: 99%

Section: Xrd Patternsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Well-dispersed polyimide/TiO2 nanocomposites: in situ sol–gel fabrication and morphological study

Seyedjamali

Pirisedigh

2012

Colloid Polym Sci

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Morphology, thermal properties, hydrophobicity and O₂/N₂ gas separation performance of 4,4′‐oxydiphthalic anhydride‐based polyimide/titania hybrids

Tsai

Tseng

et al. 2012

Polymer International

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Two 4,4′‐oxydiphthalic anhydride (ODPA)‐based polyimide (PI)/titania hybrid films with different morphologies were prepared through an in situ sol‐gel process. The precursor, poly(amic acid) (PAA), was synthesized using ODPA, diamine of 2,2‐bis[4‐(4‐aminophenoxy)phenyl]propane (BAPP) or 4,4′‐diaminodiphenyl ether (ODA) and a suitable amount of dimethylformamide solvent. A mixture of tetraethylorthotitanate (Ti(OEt)4) and acetylacetone with molar ratio of 1:4 was then added to the PAA solution and mixed thoroughly. Following curing, PI/titania hybrid membranes with different crosslinkages and Ti(OEt)4 contents were prepared. PI hybrids with the longer BAPP diamine present different morphologies and property changes related to the Ti(OEt)4 content from those of hybrids with the shorter ODA diamine. The morphologies of the two ODPA‐based PI/titania hybrids were studied with reference to the disruption of imide ring formation. Different crosslinked structures produced were identified using Fourier transform infrared analysis from the frequency shift of the CO band and relative absorbance intensities of bands of CO group and imide ring (N). Thermal properties, O2/N2 gas separation performance, contact angle, storage modulus, glass transition temperature and decomposition temperature of the PI hybrids were all found to be functions of the Ti(OEt)4 content, crosslinked structure and PI type. Copyright © 2012 Society of Chemical Industry

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Synthesis and characterization of fluorinated polyimide/TiO2 nanocomposites: enhancement of separation of four gases, thermal, optical and mechanical properties

et al. 2017

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Synthesis and morphology of new functional polyimide/titania nano hybrid materials

Cited by 25 publications

References 38 publications

Well-dispersed polyimide/TiO2 nanocomposites: in situ sol–gel fabrication and morphological study

Well-dispersed polyimide/TiO2 nanocomposites: in situ sol–gel fabrication and morphological study

Morphology, thermal properties, hydrophobicity and O₂/N₂ gas separation performance of 4,4′‐oxydiphthalic anhydride‐based polyimide/titania hybrids

Synthesis and characterization of fluorinated polyimide/TiO2 nanocomposites: enhancement of separation of four gases, thermal, optical and mechanical properties

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Synthesis and morphology of new functional polyimide/titania nano hybrid materials

Cited by 25 publications

References 38 publications

Well-dispersed polyimide/TiO2 nanocomposites: in situ sol–gel fabrication and morphological study

Well-dispersed polyimide/TiO2 nanocomposites: in situ sol–gel fabrication and morphological study

Morphology, thermal properties, hydrophobicity and O2/N2 gas separation performance of 4,4′‐oxydiphthalic anhydride‐based polyimide/titania hybrids

Synthesis and characterization of fluorinated polyimide/TiO2 nanocomposites: enhancement of separation of four gases, thermal, optical and mechanical properties

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Morphology, thermal properties, hydrophobicity and O₂/N₂ gas separation performance of 4,4′‐oxydiphthalic anhydride‐based polyimide/titania hybrids