In Situ SAXS and WAXD Investigations of Polyamide 66/Reduced Graphene Oxide Nanocomposites During Uniaxial Deformation

Chi, Enyi; Tang, Yujing; Wang, Zongbao

doi:10.1021/acsomega.1c01365

Cited by 8 publications

(4 citation statements)

References 55 publications

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“…Based on the calculation result, the crystal plane space of GO was 0.78 nm. The 2 θ diffraction angle of GO appeared at the position of 11.3°, which was similar to the literature reported 55 . The (001) crystal plane spacing of GO was 0.782 nm, larger than that of 0.336 nm graphite.…”

Section: Resultssupporting

confidence: 88%

“…The 2θ diffraction angle of GO appeared at the position of 11.3 , which was similar to the literature reported. 55 The (001) crystal plane spacing of GO was 0.782 nm, larger than that of 0.336 nm graphite. The main reason could be the weakened van der Waals' force sourced from sheets and the increased layer space the intervention of oxygenated groups during the GO preparation process.…”

Section: Xrd Characterizationmentioning

confidence: 91%

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Properties study of composites for polybutene‐1 and modified graphene oxide

Kou

Duan

Chen

et al. 2022

J of Applied Polymer Sci

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Polybutene-1 (PB-1) was wildly used as pipe and film with its excellent mechanical performance, great creep resistance even at high temperature, good machinability, and fillable performance. This work focused on studying the properties of composites for polybutene-1 and modified graphene oxide (MGO). The graphene oxide (GO) was prepared using an improved Hummers method, and then it was modified with γ-methylacryloxy propyl trimethoxysilane (KH570). After that, the obtained MGO was composited with PB-1 by the solution blending method. The structure and properties of PB-1 composites were investigated by Fourier transform infrared (FTIR), scanning electron microscope (SEM), Xray diffraction (XRD), thermogravimetric analysis (TGA), differential scanning calorimeter (DSC), universal material testing machine. The results showed that the MGO and PB-1 presented good compatibility, and the addition of MGO could not change the crystal morphology of PB-1. When the content of MGO was 0.75 wt% of PB-1, the melt and crystallization temperatures were 127.5 and 70.5 C, and the strength of tensile and bending in the PB-1/MGO composites was 27.58 and 674 MPa. Thus, the PB-1/MGO composites have great potential for practical applications, such as in agricultural films and tubes.

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Section: Resultssupporting

confidence: 88%

Section: Xrd Characterizationmentioning

confidence: 91%

Properties study of composites for polybutene‐1 and modified graphene oxide

Kou

Duan

Chen

et al. 2022

J of Applied Polymer Sci

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“…On the other hand, the γ -type crystal form in a pseudo-hexagonal shape is the other stable crystalline structure of PA66, which was formed with shorter molecular chains. The introduction of PACM6 disrupted the crystalline regularity of PA66, leading to a reduction in the copolymer’s crystallinity and resulting in a transition from the monoclinic α -type to the pseudo-hexagonal γ -type crystalline structure [ 41 , 42 ].…”

Section: Resultsmentioning

confidence: 99%

An Intrinsically Transparent Polyamide Film with Superior Toughness and Great Optical Performance

Li,

Yi,

Wang

et al. 2024

Polymers

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Polyamide 66 was extensively utilized in various applications contributed by its excellent mechanical performance and outstanding durability. However, its high crystallinity renders it to have low transparency, which seriously limits its application in optical devices. Herein, a highly transparent polyamide (PA) 66-based copolymer was reported using 4,4′-diaminodicyclohexylmethane (PACM), adipic acid, and polyamide 66 salt as the reaction monomers. Wide-angle X-ray diffraction (WAXD) analysis revealed that the crystal phase of the synthesized PA66/PACM6 displayed a clear transition from α to γ as the PACM6 increased accompanied by a decreased intensity in the diffraction peak of the copolymer, whose transmittance was successfully adjusted reaching as high as 92.5% (at 550 nm) when the PACM6 was 40 wt%. Moreover, the copolymer with a higher content of PACM6 exhibited larger toughness. On the other hand, the biaxially oriented films of PA66/PACM6 (20 wt%) were also prepared, and it was found that the transparency of the PA66/PACM6 copolymer could be further enhanced via adjusting the stretching ratio of the film. Furthermore, the mechanical strength of the biaxially oriented PA66/PACM6 was also improved with the increase in the orientation degree in the stretching process, indicating that the physical properties of the transparent PA66 were significantly influenced by its alicyclic structure, and the introduction of PACM into PA66 was capable of effectively improving the optical and crystalline characteristics of PA66, revealing that the synthetic strategy has great potential for guiding the design and development of transparent polyamide materials.

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“…However, the hydrophilicity of GA/PA66 films was significantly increased since the composite films had a super hydrophilic surface of 0° at both 0 s and 3 s. Similar results were reported by Cao et al [43], who found that compared to pure polyethersulfone film, the hydrophilicity of the polyethersul-fone/PA66 filtration film surface was improved. This may be related to the fact that a considerable number of hydrophilic groups existed in PA66 [44], and the homogeneous dispersion of gelatin in the mixing system, thus exposing the hydrophilic groups more sufficiently to the surface. The hydrophilic surfaces of materials have been considered as an important factor in increasing the antimicrobial agent loading and antimicrobial activity.…”

Section: Water Contact Angles Analysismentioning

confidence: 99%

Application of Solution Blow Spinning for Rapid Fabrication of Gelatin/Nylon 66 Nanofibrous Film

Yang

Shen

Zou

et al. 2021

Foods

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Gelatin (GA) is a natural protein widely used in food packaging, but its fabricated fibrous film has the defects of a high tendency to swell and inferior mechanical properties. In this work, a novel spinning technique, solution blow spinning (SBS), was used for the rapid fabrication of nanofiber materials; meanwhile, nylon 66 (PA66) was used to improve the mechanical properties and the ability to resist dissolution of gelatin films. Morphology observations show that GA/PA66 composite films had nano-diameter from 172.3 to 322.1 nm. Fourier transform infrared spectroscopy and X-ray indicate that GA and PA66 had strong interaction by hydrogen bonding. Mechanical tests show the elongation at break of the composite film increased substantially from 7.98% to 30.36%, and the tensile strength of the composite film increased from 0.03 MPa up to 1.42 MPa, which indicate that the composite films had the highest mechanical strength. Water vapor permeability analysis shows lower water vapor permeability of 9.93 g mm/ m2 h kPa, indicates that GA/PA66 film’s water vapor barrier performance was improved. Solvent resistance analysis indicates that PA66 could effectively improve the ability of GA to resist dissolution. This work indicates that SBS has great promise for rapid preparation of nanofibrous film for food packaging, and PA66 can be applied to the modification of gelatin film.

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In Situ SAXS and WAXD Investigations of Polyamide 66/Reduced Graphene Oxide Nanocomposites During Uniaxial Deformation

Cited by 8 publications

References 55 publications

Properties study of composites for polybutene‐1 and modified graphene oxide

Properties study of composites for polybutene‐1 and modified graphene oxide

An Intrinsically Transparent Polyamide Film with Superior Toughness and Great Optical Performance

Application of Solution Blow Spinning for Rapid Fabrication of Gelatin/Nylon 66 Nanofibrous Film

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