Zirconium phosphate changing hygroscopicity of polyamide-6 in nanocomposites PA-6/ZrP

García, Elvis; Freitas, Daniela F. S.; Cestari, Sibele Piedade; Coval, D. R.; Mendes, Luís Claudio; Albitres, Gerson Alberto Valencia

doi:10.1007/s10973-019-08396-1

Cited by 11 publications

(5 citation statements)

References 49 publications

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“…This is consistent with the results of FT‐IR characterization and similar results were also reported in other polymers containing zirconium phosphate (i.e., Polyamide‐6(PA‐6)‐ZrP, Poly(vinyl alcohol) (PVA)‐ZrP). [ 51 ]…”

Section: Resultsmentioning

confidence: 99%

Largely Improved Breakdown Strength and Discharge Efficiency of Layer‐Structured Nanocomposites by Filling with a Small Loading Fraction of 2D Zirconium Phosphate Nanosheets

Liang

Shi

Tan

et al. 2021

Adv Materials Inter

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Dielectric film capacitors have aroused considerable attention on account of the fast development of pulsed power systems. However, enhanced energy density is always acquired at the cost of deteriorated charge/discharge efficiency. Herein, well balanced energy density and efficiency are achieved in a series of reasonably designed bilayer composites consisting of a ferroelectric layer and a paraelectric layer at the meantime. It is interesting to find that, when merely 1.6 wt% Zr(HPO4)2 nanosheets are introduced into the ferroelectric layer, a substantially improved energy density of 11.22 J cm−3, which is about 165% that of the bilayer composite without Zr(HPO4)2 nanosheets, is achieved at 650 kV mm−1. Meanwhile, a high charge/discharge efficiency of 89.8% and a low loss tangent of 0.024@10 kHz which is much lower than the pristine ferroelectric polymer layer (0.058@10 kHz) is maintained. Furthermore, finite element simulation reveals that the electric breakdown paths will develop along the macroscopical‐interfaces between adjoining layers and the microcosmic‐interfaces between the Zr(HPO4)2 nanosheets and polymer matrix, which can effectively increase the length of breakdown paths and contribute to improved breakdown strength. This work demonstrates that the Zr(HPO4)2 nanosheets can be promising fillers for other high‐performance dielectric composites.

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Section: Resultsmentioning

confidence: 99%

Largely Improved Breakdown Strength and Discharge Efficiency of Layer‐Structured Nanocomposites by Filling with a Small Loading Fraction of 2D Zirconium Phosphate Nanosheets

Liang

Shi

Tan

et al. 2021

Adv Materials Inter

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“…In the spectrum a-c, the principal vibrations associated with the chitosan structure are recognized in the region about 3300 cm − 1 and these correspond to the range of amide bands [41]. Furthermore, the peak in 2950 cm − 1 is allocated to the asymmetric vibration of the C-H of the methyl group [42,43]. The nanocomposite lms in this zone only display broad peaks which are associated with the signals of the stated peaks, discovered in chitosan and polyamide.…”

Section: Current-voltage (I-v) Characteristic and Nanocomposite Resistancementioning

confidence: 96%

Study on the Preparation and Properties of Polyamide/Chitosan Nanocomposite Fabricated by Electrospinning Method

Fazeli

Nuge

et al. 2021

J Polym Environ

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The principal intention of this work is to fabricate and characterize the polyamide/chitosan nanocomposite by a novel single solvent method through the electrospinning procedure. The thermal properties and morphology of prepared nanocomposite are studied by thermogravimetric analysis (TGA) and eld-emission scanning electron microscopy (FE-SEM). TGA exposed that the primary decomposition temperature is reduced with rising of chitosan content in the nanocomposites and origin disintegration temperature for polyamide/chitosan nanocomposites is perceived to be in the range from 300 to 500°C. Also, FE-SEM images demonstrated that the nano bers of chitosan have good adhesion on the matrix and are well-oriented. Besides, the crystallinity and structural characteristics of the polyamide/chitosan nanocomposites are investigated by using X-ray diffraction (XRD) and Fourier transform-infrared spectroscopy (FT-IR), respectively. The results of XRD proved that the successful blending of chitosan in polyamide is achieved via the electrospinning method. FT-IR results demonstrate that the nano bers are consist of amine groups. Also, the electrical properties of the nanocomposite improved with the increasing content of chitosan and the conductivity of the polyamide/chitosan 5 wt% demonstrates the maximum current of 0.3 nA. Besides, the sheet resistance of the composite reduced 118 to 20 × 10 9 Ω with raising the chitosan volume from 0 to 5 wt%.

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“…Reinforcement in mechanical properties were associated to the hydrogen bond between the NH group from PA-6 with the functional groups in the graphene. 30 Strong interaction between PA-6 filled with organically modified zirconium phosphate was reported by Garcia et al 31 and Freitas et al 27 We attributed the lowering of the amine index to the action of ZrP collapsing of the intra and inter PA-6 hydrogen bond. We also believed that this breakage favored the formation of hydrogen bond among P-OH groups in ZrP with PA-6 carbonyl groups.…”

Section: Resultsmentioning

confidence: 53%

Mechanical, thermal, rheological assessment of polyamide-6 reinforced composites by addition of lamellar zirconium phosphate

Freitas

Albitres

Mariano

et al. 2022

Journal of Thermoplastic Composite Materials

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The improvement of properties has been pursued through the addition of an immense variety of fillers in polymers. In this work we studied the effect of lamellar zirconium phosphate (ZrP) on the physico-mechanical properties of polyamide-6 (PA-6). The ZrP was synthesized and incorporated into PA-6 matrix at 1, 2 and 3 wt.%. Structural, thermal, relaxometric, tensile, melt flow and rheologic characteristics were assessed. Thermogravimetry indicated a low influence of the filler on thermal stability. The deconvolution of the melting peaks indicated transformation of the PA-6 α to γ phase and increase in crystallinity degree. Sample with 1 wt.% of ZrP showed an additional peak at higher relaxation time indicating restriction of polymer molecular mobility. By infrared, amine and carbonyl indices evaluation suggested ZrP interfered on the PA-6 hydrogen bonds. The elastic modulus increased slightly for all composition. Melt flow rate decreased with the amount of ZrP. The composite with 1 wt.% of ZrP exhibited the highest storage modulus and shear thinning effect noticed in the complex viscosity.

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Zirconium phosphate changing hygroscopicity of polyamide-6 in nanocomposites PA-6/ZrP

Cited by 11 publications

References 49 publications

Largely Improved Breakdown Strength and Discharge Efficiency of Layer‐Structured Nanocomposites by Filling with a Small Loading Fraction of 2D Zirconium Phosphate Nanosheets

Largely Improved Breakdown Strength and Discharge Efficiency of Layer‐Structured Nanocomposites by Filling with a Small Loading Fraction of 2D Zirconium Phosphate Nanosheets

Study on the Preparation and Properties of Polyamide/Chitosan Nanocomposite Fabricated by Electrospinning Method

Mechanical, thermal, rheological assessment of polyamide-6 reinforced composites by addition of lamellar zirconium phosphate

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