Mechanical Properties, Melting and Crystallization Behaviors, and Morphology of Carbon Nanotubes/Continuous Carbon Fiber Reinforced Polyethylene Terephthalate Composites

Qiao, Liang; Yan, Xu; Tan, Hongsheng; Dong, Shuhua; Ju, Guannan; Shen, Hongwang; Ren, Zhaoying

doi:10.3390/polym14142892

Cited by 16 publications

(6 citation statements)

References 69 publications

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“…The higher heat stability of USP compared to CC and USB is evident from its thermal behavior above 180°C, which can be attributed to the unfolding of the triple helix. Additionally, the T m value was influenced by the crystallinity of the material, with higher T m values corresponding to increased crystallinity (Qiao et al., 2022). Consistent with the XRD results displaying the highest crystallinity (6.05%) in USP, it exhibited the highest T m (202.56 ± 0.11°C), as expected.…”

Section: Resultsmentioning

confidence: 99%

Structural and molecular characterization of collagen‐type I extracted from lamb feet

Ata,

Bakar,

Turkoz

et al. 2023

Journal of Food Science

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This study aimed to extract collagen‐I from lamb feet (LF) and examine the effects of ultrasound treatment on the structural and molecular characteristics of the collagen. Compared to ultrasonic bath treatment and conventional extraction methods, ultrasonic probe (USP) treatment significantly increased the collagen content of the extract (p < 0.05). The electrophoretic profiles confirmed the presence of α‐ and β‐chains, indicating it as type I. Furthermore, X‐ray diffraction, Fourier‐transform infrared spectroscopy, and circular dichroism spectra analyses revealed that the extraction method did not adversely affect the triple helix structure of the collagen. Moreover, the fibrillar structure of the collagen samples was verified through scanning electron microscopy analyses. Notably, the LF collagen exhibited a high thermal denaturation temperature owing to its elevated imino acid content. The collagen samples exhibited high solubility in acidic pH but low solubility in high salt concentrations. The present findings signified that sonication with USP can effectively enhance the yield of collagen from LF without compromising its quality.Practical ApplicationThis study showed that ultrasonication enhanced the collagen concentration without disturbing the integrity of lamb feet collagen. We expect that lamb feet collagen can be used for industrial processes and consumer products thanks to unique product properties.

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Section: Resultsmentioning

confidence: 99%

Structural and molecular characterization of collagen‐type I extracted from lamb feet

Ata,

Bakar,

Turkoz

et al. 2023

Journal of Food Science

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“…2(a) shows strong and sharp diffraction peaks, indicating the crystalline structure of the samples. The coated SiCp, however, showed sharper and narrower peaks than uncoated SiCp indicating better crystallinity [16], which usually corresponds to better mechanical properties when used as reinforcement [17]. Furthermore, the diffraction peaks at approximately 33.12, 35.08, 36.53, 39.03, 60.78, 66.67, and 72.67, can be indexed as ( 112), ( 212), ( 111), ( 200), ( 220), ( 311 SiCp was confirmed in the uncoated and coated composites respectively.…”

Section: Characterization Of the Composite Materials Xrd Of Uncoated ...mentioning

confidence: 90%

Effect of SiO2 Surface Oxidation Coating of Silicon Carbide Particles Reinforcement on the Mechanical Properties of Al-2.5%Mg/xSiCp Developed by Stir Casting Method

AMBALI¹,

Oyelaran²,

Bolaji³

et al. 2023

Acta Metall Slovaca

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The literature revealed that composites developed through stir casting process suffer some limitations such as low wettability and insufficient bonding between the molten Al and SiCp and the formation of aluminium carbide (Al4C3) at the interface which degrades mechanical performances of the composites. To overcome these challenges, this study used magnesium for improved wettability, heat treatment of reinforcement particles (SiCp) and application of metallic (SiO2) coating on the SiCp before addition to melt to improve Al-SiCp wettability in the manufacture of Al-2.5%Mg/xSiCp composites. The SiCp coating reduce direct interaction and promote wetting between SiCp and molten Al to developed Al-2.5%Mg/xSiCp composites. The percentage weight of SiCp varied from 5 wt% to 20 wt% (uncoated and coated) at 5 % intervals. The mechanical properties tests were conducted to examined the effects of coating and variation of volume percentage of SiCp on the composites developed. The results obtained showed that the reinforced alloy with both uncoated and coated SiCp performed favorably well compared to the control sample with 0% SiCp. The improvement of interfacial strength was observed in the composites developed with coated SiCp as the coating of SiCp enhanced its diffusion with Al-2.5%Mg.

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“…Finally, the samples cooled to 20 °C were reheated to 200 °C at a constant rate of 10 °C/min to characterize the melting and crystallization behavior of the material. The crystallinity Xc was calculated, as shown in Equation (2) [ 43 ]:

…”

Section: Methodsmentioning

confidence: 99%

Research on Properties of PBAT/CaCO3 Composite Films Modified with Titanate Coupling Agent

et al. 2023

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High cost, low crystallinity, and low-melt strength limit the market application of the biodegradable material poly (butylene adipate-co-terephthalate) (PBAT), which has become a major obstacle to the promotion of PBAT products. Herein, with PBAT as resin matrix and calcium carbonate (CaCO3) as filler, PBAT/CaCO3 composite films were designed and prepared with a twin-screw extruder and single-screw extrusion blow-molding machine designed, and the effects of particle size (1250 mesh, 2000 mesh), particle content (0–36%) and titanate coupling agent (TC) surface modification of CaCO3 on the properties of PBAT/CaCO3 composite film were investigated. The results showed that the size and content of CaCO3 particles had a significant effect on the tensile properties of the composites. The addition of unmodified CaCO3 decreased the tensile properties of the composites by more than 30%. TC-modified CaCO3 improved the overall performance of PBAT/CaCO3 composite films. The thermal analysis showed that the addition of titanate coupling agent 201 (TC-2) increased the decomposition temperature of CaCO3 from 533.9 °C to 566.1 °C, thereby enhancing the thermal stability of the material. Due to the heterogeneous nucleation of CaCO3, the addition of modified CaCO3 raised the crystallization temperature of the film from 97.51 °C to 99.67 °C and increased the degree of crystallization from 7.09% to 14.83%. The tensile property test results showed that the film reached the maximum tensile strength of 20.55 MPa with the addition of TC-2 at 1%. The results of contact angle, water absorption, and water vapor transmission performance tests showed that TC-2 modified CaCO3 increased the water contact angle of the composite film from 85.7° to 94.6° and decreased the water absorption from 13% to 1%. When the additional amount of TC-2 was 1%, the water vapor transmission rate of the composites was reduced by 27.99%, and the water vapor permeability coefficient was reduced by 43.19%.

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Mechanical Properties, Melting and Crystallization Behaviors, and Morphology of Carbon Nanotubes/Continuous Carbon Fiber Reinforced Polyethylene Terephthalate Composites

Cited by 16 publications

References 69 publications

Structural and molecular characterization of collagen‐type I extracted from lamb feet

Structural and molecular characterization of collagen‐type I extracted from lamb feet

Effect of SiO2 Surface Oxidation Coating of Silicon Carbide Particles Reinforcement on the Mechanical Properties of Al-2.5%Mg/xSiCp Developed by Stir Casting Method

Research on Properties of PBAT/CaCO3 Composite Films Modified with Titanate Coupling Agent

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