Color adjustable, mechanically robust, flame-retardant and weather-resistant TiO2/MMT/CNF hierarchical nanocomposite coatings toward intelligent fire cyclic warning and protection

Shen, Yan-Bin; Yu, Ke-Xin; Wang, Ye-Jun; Qu, Yun-Hao; Pan, Long-Qian; Cao, Cheng-Fei; Cao, Kun; Gao, Jie-Feng; Shi, Yongqian; Song, Pingan; Yong, Jianming; Hong, Min; Zhang, Guo-Dong; Zhao, Li; Tang, Long-Cheng

doi:10.1016/j.compositesb.2023.111159

Cited by 55 publications

(5 citation statements)

References 44 publications

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“…Therefore, a better interfacial strength increases FS to a higher extent than ILSS. An interfacial improvement by PEI sizing agents in CF/PEEK laminates has been observed by other researchers as well. − However, our work shows the improvement in polymer metal bonding without the use of anodization, IR laser treatments, or any other surface modification of SS as reported in other works with fiber metal laminate (FML) structures, which are expensive and cumbersome. , …”

Section: Resultssupporting

confidence: 72%

“…During high-temperature processing, the miscibility of PEI and PEEK in their molten state enables them to melt and blend, ultimately improving the interface. , Moreover, the H-bonding and π-π interaction of PEI and PEEK are also responsible for the increase in bonding. The use of PEI as sizing agent over carbon fabrics has shown significant improvements in mechanical properties. − The bonding between PEI and SS is well known in the literature. − The polar functional groups such as imide and ether bonds provide a strong bonding between PEI and SS and help in efficient stress transfer during stress application. − This study delves into the comprehensive assessment of the mechanical, deicing, and electromagnetic interference (EMI) shielding properties of these laminates, offering insights and discussions on the observed outcomes.…”

Section: Introductionmentioning

confidence: 99%

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Improving the Mechanical, Deicing, and Electromagnetic Shielding Properties Using Engineering Interfaces in CF/PEEK Laminates

Raj,

Parasuram,

Mishra

et al. 2024

ACS Appl. Eng. Mater.

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Carbon fiber (CF) laminates based on an engineering thermoplastic matrix, specifically polyetheretherketone (PEEK)/CF, are actively being investigated for their potential applications in aircraft structures. These laminates offer notable advantages, including high damage tolerance, weldability, elevated temperature performance, recyclability, and faster production rates when compared to traditional thermoset matrix-based CF laminates. These attributes position them as promising candidates for structural applications in aircraft. In addition to their structural properties, functional aspects such as deicing/anti-icing capabilities and electromagnetic interference (EMI) shielding are crucial for these aerospace applications. The ice accumulation at high altitudes during in-service flights poses a significant challenge, affecting aerodynamics and adding weight. Electrothermal heating stands out as a viable solution for deicing aerostructures. However, the inherent low electrical and thermal conductivity of the laminates poses a hurdle. While CFs exhibit excellent conductivity, the insulating polymer hinders both charge and thermal transport across the laminates. This study focuses on enhancing the transport properties of PEEK/CF laminates by integrating a stainless-steel (SS) mesh, thereby improving the electrothermal heating characteristics. The SS/PEEK/CF structure is engineered to enhance electrothermal heating, reducing the ice-melting time while preserving the mechanical properties of the laminate. To address the challenge of poor bonding between SS and PEEK, poly(ether imide) (PEI) is introduced due to its compatibility with the PEEK matrix. The incorporation of PEI-coated SS results in a notable improvement in interlaminar shear strength (ILSS), flexural strength (FS), and storage modulus-exhibiting enhancements of 9, 16, and 44%, respectively. The maximum temperature on the laminate surface increases from 41 to 92 °C, and deicing time decreases from 120 to 45 s with a modest applied voltage of 2 V. Furthermore, the electromagnetic interference (EMI) shielding effectiveness shows an increase from 47 to 60 dB. This unique structural approach, involving the incorporation of a metallic mesh and enhancing its bonding with the matrix, holds great promise for advancing aerostructures in terms of both performance and functionality.

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Section: Resultssupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Improving the Mechanical, Deicing, and Electromagnetic Shielding Properties Using Engineering Interfaces in CF/PEEK Laminates

Raj,

Parasuram,

Mishra

et al. 2024

ACS Appl. Eng. Mater.

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“…As shown in Figure b, the characteristic peaks of P1-PMIA at 3450 and 1638 cm –1 correspond to the N–H stretching vibration and CO stretching vibration on the amide group, respectively. Moreover, compared with P1-nPMIA, the peak positions of the symmetric stretching vibration bonds of N–H and CO exhibit a blueshift after stretching, indicating the enhancement of hydrogen bonding between P1-PMIA molecular chains. − The above results suggest that stretching and heat-setting can elevate the mobility of molecular chains, enhance hydrogen bonding between them, and improve the crystallinity and orientation of filaments, as illustrated in Figure f. Furthermore, the thermal stability of the P1-PMIA filaments was analyzed (Figure c).…”

Section: Resultsmentioning

confidence: 92%

Preparation of Meta-Aramid Filaments with High Strength and UV-Resistant Properties through Wet Spinning

Liu,

Wang,

et al. 2024

ACS Appl. Polym. Mater.

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Poly(m-phenylene isophthalamide) (PMIA) filaments possess stable chemical properties, excellent heat resistance, and flame retardancy, making them widely used in cutting-edge fields, such as aerospace, aviation, military, and electronics. However, inferior ultraviolet (UV) resistance and poor surface activity severely limit their applications, especially in harsh environments. As an excellent inorganic UV resistance agent, zinc oxide nanowires (ZnO NWs) can be grafted onto filaments to effectively solve this problem. Herein, the superstrong PMIA filaments were preprepared by wet spinning, followed by the use of poly L-3,4 dihydroxyphenylalanine (PDOPA) coating as a binder to improve the UV resistance of the PMIA filaments through bidentate chelating interaction of carboxyl groups and zinc atoms. In addition, the mechanism of the wet spinning coagulation process of PMIA filaments was systematically investigated, achieving a tensile strength of 1255.56 MPa and an elastic modulus of 8.04 GPa. After graft modification, the PMIA filaments decorated with PDOPA and ZnO NWs (PMIA-PDOPA-ZnO NWs) maintain excellent mechanical strength of 1182.79 MPa. Impressively, after 120 h of ultraviolet irradiation, the tensile strength of PMIA-PDOPA-ZnO NW filament remains at 1070.74 MPa, retaining 90.53% of the tensile strength of the filaments without ultraviolet irradiation, accompanied by excellent washing durability. This work proposes a simple and nondamaging method to achieve highly UV-resistant PMIA filaments without sacrificing their excellent properties, which is expected to guide the design of advanced multifunctional fibers.

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“…All of the films appear transparent and slightly colored as the inorganic loading increases (Figure ). The homogeneous dispersion of the titania NC is confirmed by the TEM images of the OLAC@Anatase/TPU 50 wt % nanocomposite, where the NCs are clearly visible with dimensions and shape analogous to those of the pristine powder (see the Supporting Information). Since both TPU and TiO 2 have no significant absorption in the visible range, the origin of the optical losses is related to the size of the filler, which produces a Rayleigh scattering effect on the bulk material.…”

Section: Resultsmentioning

confidence: 99%

Transparent and High-Refractive-Index Titanium Dioxide/Thermoplastic Polyurethane Nanocomposites

Tawfilas,

Bartolini Torres,

Lorenzi

et al. 2024

ACS Omega

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Color adjustable, mechanically robust, flame-retardant and weather-resistant TiO2/MMT/CNF hierarchical nanocomposite coatings toward intelligent fire cyclic warning and protection

Cited by 55 publications

References 44 publications

Improving the Mechanical, Deicing, and Electromagnetic Shielding Properties Using Engineering Interfaces in CF/PEEK Laminates

Improving the Mechanical, Deicing, and Electromagnetic Shielding Properties Using Engineering Interfaces in CF/PEEK Laminates

Preparation of Meta-Aramid Filaments with High Strength and UV-Resistant Properties through Wet Spinning

Transparent and High-Refractive-Index Titanium Dioxide/Thermoplastic Polyurethane Nanocomposites

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