The Role of α, γ,  and Metastable Polymorphs on Electrospun Polyamide 6/Functionalized Graphene Oxide

Macossay, Javier; Avila-Vega, Yazmín I.; Sheikh, Faheem A.; Cantu, Travis; Rodríguez, F.E. Longoria; Ramírez-Soria, Edgar H.; Advíncula, Rigoberto C.; Bonilla‐Cruz, José

doi:10.1002/marc.202000195

Cited by 7 publications

(5 citation statements)

References 40 publications

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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: 66%

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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Section: Resultsmentioning

confidence: 66%

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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“…Based on the SEM analysis above and the changes in the mechanical properties of PA10T/ND nanocomposites, it is found that the introduction of ND has a significant reinforcing effect on the composites. The reinforcement effect is not only due to the homogeneous dispersion of ND in the matrix, but also a result of the formation of the hydrogen bonds and amide bonds between the surface oxygen groups of ND and the PA10T matrix, which provides strong interactions between the ND and PA10T 33,34 . When the ND content increased, the agglomeration of ND intensified.…”

Section: Resultsmentioning

confidence: 99%

“…The reinforcement effect is not only due to the homogeneous dispersion of ND in the matrix, but also a result of the formation of the hydrogen bonds and amide bonds between the surface oxygen groups of ND and the PA10T matrix, which provides strong interactions between the ND and PA10T. 33,34 When the ND content increased, the agglomeration of ND intensified. These agglomerated ND particles acted as crosslinking points and caused nanocomposites networks to form with strengthened intermolecular forces between polymer chains.…”

Section: Mechanical Properties Of 10 T/nd Nanocompositesmentioning

confidence: 99%

Simultaneous enhancement of mechanical performance and thermal conductivity for polyamide 10T by nanodiamond compositing

Feng

Ren

et al. 2021

J of Applied Polymer Sci

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In high-frequency devices and thermal management areas, there is an urgent demand for polyamide with high-mechanical strength and highthermal conductivity simultaneously. In this study, semiaromatic polyamide 10T/nanodiamond (ND) nanocomposites were prepared via predispersion and in situ polymerization, which was conducive to achieve the homogeneous distribution of ND in the PA10T matrix. The tensile strength and impact strength of the PA10T/1.0 wt% ND nanocomposite increased by 27% and 102%, respectively. With the content of only 1.0 wt% of ND, the thermal conductivity of the nanocomposite increased from 0.36 to 0.51 W/(mÁK). In addition, the thermomechanical properties and thermal stability of nanocomposites were also been improved. We attributed the composite reinforcing effect to not only the uniform dispersion of ND in the matrix and strong interfacial interactions between ND and PA10T molecules, but also the formation of ND-centered cross-linking structures in the composites. Thus, ND compositing is a promising way to enhance both the mechanical properties and thermal conductivity of polyamide.

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“…Figure 3(a) shows the FTIR spectra of nanofibers prepared by varying the weight percentages of nylon-6. The N-H stretching of nylon-6 exhibits the characteristic features of a polyamide, displaying a peak at 3309 cm −1 and a secondary peak at 3075 cm −1 [16,23,24]. The peak corresponding to the aliphatic C-H stretching vibration in the polymer chain was observed at 2933 cm −1 in nylon-6 samples.…”

Section: Morphological Structural and Thermal Analyses Of Nylon-6 Nan...mentioning

confidence: 95%

Sustainable energy harvesting and breath sensing with electrospun triboelectric nylon-6

Jelmy,

Sunil,

Kandappanthodi

et al. 2024

J. Phys. Energy

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A high-performance triboelectric nanogenerator (TENG) has been developed for breath sensing applications, utilizing tribopositive electrospun nylon-6 nanofibers and tribonegative fluorinated ethylene propylene (FEP). The optimization towards the development of electrospun nylon-6-based TENG includes a range of factors such as the applied force and frequency on tribo responses, the thickness of the fiber mat, the concentration of nylon-6 in the fiber mats, and the selection of the tribonegative material for pairing with nylon-6 nanofiber. Among these parameters, the nanofiber prepared with 18 wt% nylon-6, characterized by a uniform fiber distribution, the highest surface area of 55.69 m2/g, and an optimal thickness of 0.169 mm, demonstrated excellent TENG performance, among others. The TENG module constructed using nanofiber in a 4 cm2 area showed the TENG responses of more than 30 μA short-circuit current, 200 V open-circuit voltage, and 90 nC charge when hand-pressed. It achieved a substantial power density of 890 mW/m2 at 20 MΩ by applying a constant force of 10 N at a 10 Hz frequency. Charging a 1 μF capacitor to approximately 30.1 V in just 30 seconds highlights the potential of electrospun nylon-6 as a promising material for nanogenerator energy harvesting and sensing applications. The TENG device was found to be sufficient to power small, portable electronics such as LEDs and digital watch displays. A wearable belt was fabricated to showcase its breath-sensing capabilities by pairing it with FEP. The microcontroller connected to the TENG in the wearable belt is used to analyze the output produced through breathing patterns, subsequently activating a buzzer and LED by the nature of the breathing.

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The Role of α, γ, and Metastable Polymorphs on Electrospun Polyamide 6/Functionalized Graphene Oxide

Cited by 7 publications

References 40 publications

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

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

Simultaneous enhancement of mechanical performance and thermal conductivity for polyamide 10T by nanodiamond compositing

Sustainable energy harvesting and breath sensing with electrospun triboelectric nylon-6

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