Polymer/organosilica nanocomposites based on polyimide with benzimidazole linkages and reactive organoclay containing isoleucine amino acid: Synthesis, characterization and morphology properties

Mallakpour, Shadpour; Dinari, Mohammad

doi:10.1016/j.materresbull.2012.05.033

Cited by 17 publications

(3 citation statements)

References 35 publications

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“…To modify the nanoclay, sodium cations of the clay were replaced by CTAB through a cation exchange reaction [19]. To prepare modified Cloisite Na + , 1.0 g of nanoclay was added to 30 mL water and solution stirred at 80 • C for 3 h. The CTAB solution was prepared by dissolving 0.5 g of CTAB in 30 mL water at 80 • C. The stoichiometric amount of concentrate HCl was added into CTAB solution.…”

Section: Preparation Of Organically Modified Cloisite Na +mentioning

confidence: 99%

Sol–gel/nanoclay composite as a sorbent for microextraction in packed syringe combined with corona discharge ionization ion mobility spectrometry for the determination of diazinon in water samples

Saraji

Jafari

Amooshahi

2017

J of Separation Science

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In this work, the microextraction in packed syringe technique combined with corona discharge ion mobility spectrometry was used for determining diazinon in water samples. A new porous composite of nanoclay and polysiloxane was prepared using a sol-gel process. An amount of 2.0 mg of the sorbent was packed in a 250 μL syringe and used for extraction. A volume of 2 mL of the sample was passed through the sorbent bed, and the entrapped analyte was eluted by 25 μL of methanol. Important parameters influencing the extraction performance were investigated. Under optimum experimental conditions, the detection limit for diazinon was 0.07 ng/mL. The intra- and inter-day relative standard deviations were 5.0 and 12.3%, respectively. The calibration curve was linear in the concentration range from 0.2 to 20.0 ng/mL (r = 0.999). The applicability of the method was demonstrated by analyzing spiked real water samples and the spiking recoveries were in the range of 95 to 106%.

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Section: Preparation Of Organically Modified Cloisite Na +mentioning

confidence: 99%

Sol–gel/nanoclay composite as a sorbent for microextraction in packed syringe combined with corona discharge ionization ion mobility spectrometry for the determination of diazinon in water samples

Saraji

Jafari

Amooshahi

2017

J of Separation Science

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“…The PI/mica hybrid films were prepared by the solution dispersion technique as shown in Figure 1 [19][20][21]. The entire reaction process was carried out at room temperature in a nitrogen atmosphere.…”

Section: Preparation Of Pi/mica Hybrid Filmsmentioning

confidence: 99%

Synthesis, characterisation and enhanced properties of polyimide/mica hybrid films

Chen

Zhu

Liu

2016

Plastics, Rubber and Composites

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Polyimide/mica (PI/mica) hybrid films were prepared from pyromellitic dianhydride/4,4-bis(3aminophenoxy)biphenyl (PMDA/4,3-BAPOBP) and mica in a solution of N,N-dimethylacetamide. The structure-property relationships of the composites were studied by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, ultraviolet-visible spectroscopy and differential scanning calorimetry. FTIR indicated successful preparation of PI/mica hybrid films. XRD and SEM results indicated that the mica was well dispersed in the PI matrix. The dependence of morphology, glass transition temperatures (T g ), dielectric properties and mechanical properties at room temperature of the hybrid films on the content of mica was discussed. It was observed that T g , the breakdown strength and tensile strength of the hybrid films, could be simultaneously increased when the mica content was lower than 8 wt-%. Meanwhile, the dielectric constant and dielectric loss of PI/mica hybrid films increased with the increase in the mica content.

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“…These properties make them generally intractable or difficult to process, thus limiting their applications. 27 Thus, incorporating new functionalities to make PIs more tractable without deteriorating their own excellent properties has turned into one of the important goals of PIs chemistry. 28,29 It has generally been recognized that the flexible linkages or bulky lateral groups, comparing with polymers without these linkages, impart better solubility and melt-processing characteristics as they cause separation of chains and lower chain packing with a free volume gain.…”

Section: Introductionmentioning

confidence: 99%

Structural, thermal and mechanical properties of polymer nanocomposites based on organosoluble polyimide with naphthyl pendent group and layered double hydroxide

Dinari

Rajabi

2016

High Performance Polymers

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In this study, a soluble aromatic polyimide (PI) with naphthyl pendent group was initially synthesized by the reaction of pyromellitic dianhydride (PMDA) with 5-methyl- N,N-bis(4-nitrophenyl)naphthalen-1-amine. Then, via co-precipitation reaction of zinc nitrate hexahydrate and chromium nitrate nonahydrate, Zn/Cr-layered double hydroxide (LDH) was synthesized using hydrothermal techniques. Finally, different novel nanocomposites (NCs) based on PI and Zn/Cr-LDH (1, 2, 4 wt%) were produced through in situ polymerization. The resulting materials were characterized by Fourier transform infrared spectroscopy, X-ray powder diffraction, thermogravimetry analysis (TGA), field emission scanning electron microscopy, transmission electron microscopy, and mechanical testing. According to the TGA results, the prepared NCs showed high thermal stability at higher temperature due to the good dispersion and homogeneity of Zn/Cr-LDH in polymeric matrix. Consequently, the mechanical properties of the synthesized NCs were enhanced by the incorporation of 2 wt% Zn/Cr-LDH in the polymer matrix.

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Polymer/organosilica nanocomposites based on polyimide with benzimidazole linkages and reactive organoclay containing isoleucine amino acid: Synthesis, characterization and morphology properties

Cited by 17 publications

References 35 publications

Sol–gel/nanoclay composite as a sorbent for microextraction in packed syringe combined with corona discharge ionization ion mobility spectrometry for the determination of diazinon in water samples

Sol–gel/nanoclay composite as a sorbent for microextraction in packed syringe combined with corona discharge ionization ion mobility spectrometry for the determination of diazinon in water samples

Synthesis, characterisation and enhanced properties of polyimide/mica hybrid films

Structural, thermal and mechanical properties of polymer nanocomposites based on organosoluble polyimide with naphthyl pendent group and layered double hydroxide

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