Construction of dendritic structure by nano-SiO2 derivate grafted with hyperbranched polyamide in aramid fiber to simultaneously improve its mechanical and compressive properties

Dai, Yu; Meng, Chenbo; Tang, Siyi; Qin, Jiaqiang; Li, Xiangyang

doi:10.1016/j.eurpolymj.2019.08.011

Cited by 22 publications

(14 citation statements)

References 39 publications

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“…In addition, the peaks at 2970 cm −1 for the PAA–AF can be ascribed to the stretching vibrations of the methylene groups from PAA. Compared to AF, PAA–AF showed a broader and stronger band around 1548 cm −1 , 1630 cm −1 and 1392 cm −1 (aromatic rings, amide I and amide П) due to the introduction of PAA by the acylamino bond [ 35 ]. Figure 3 shows the SEM image of AF and PAA–AF, and it clear that the surface AF is very smooth ( Figure 3 a), whereas the PAA–AF is obviously covered by a rough grafted layer ( Figure 3 b).…”

Section: Resultsmentioning

confidence: 99%

Rivet-Inspired Modification of Aramid Fiber by Decorating with Silica Particles to Enhance the Interfacial Interaction and Mechanical Properties of Rubber Composites

Xiong

Zhang

2020

Materials

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A rivet–inspired method of decorating aramid fiber (AF) with silica particles (SiO2) is proposed to produce SiO2@AF hybrid materials that have largely enhanced interfacial interaction with the rubber matrix. AF was firstly surface-modified with polyacrylic acid (PAA) to obtain PAA–AF, and SiO2 was silanized with 3-aminopropyltriethoxysilane to obtain APES–SiO2. Then, SiO2@AF was prepared by chemically bonding APES–SiO2 onto the surface of PAA–AF in the presence of dicyclohexylcarbodiimide (DCC) and 4-dimethylaminopyridine (DMAP). With the incorporation of SiO2@AF into the rubber matrix, SiO2@AF hybrid materials with high surface roughness can play a role as ‘rivets’ to immobilize large numbers of rubber chains on the surface. The tear strength and tensile strength of rubber composite that filling 4 phr SiO2@AF are dramatically increased by 97.8% and 89.3% compared to pure rubber, respectively. Furthermore, SiO2@AF has superiority in enhancing the cutting resistance of rubber composites, in contrast with unmodified AF and SiO2. SiO2@AF is suitable to be applied as a novel reinforcing filler in rubber composites for high performance.

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Section: Resultsmentioning

confidence: 99%

Rivet-Inspired Modification of Aramid Fiber by Decorating with Silica Particles to Enhance the Interfacial Interaction and Mechanical Properties of Rubber Composites

Xiong

Zhang

2020

Materials

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“…However, current tensile strength (4.5–5.5 GPa) and Young's modulus (140.0–146.0 GPa) of PBIA fibers still have a large gap with the theoretical predications (tensile strength larger than 30.0 GPa and modulus larger than 182.0 GPa) due to the inevitable structural defects (such as voids and ends of chains) in fibers and weak lateral interactions between polymer chains. [ 10–12 ] Meanwhile, harsh application scenarios of PBIA fibers are putting forward even stringent requirements for their mechanical performances and environmental compatibility. [ 13 ] Therefore, many efforts have been devoted to improving the mechanical properties of PBIA fibers.…”

Section: Introductionmentioning

confidence: 99%

Holey Reduced Graphene Oxide Scaffolded Heterocyclic Aramid Fibers with Enhanced Mechanical Performance

Wen

Xiao

et al. 2022

Adv Funct Materials

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Poly(p‐phenylene‐benzimidazole‐terephthalamide) (PBIA) fibers, a kind of heterocyclic aramid fibers, possess extraordinary mechanical properties and advanced applications in aerospace, military protection, and other civilian areas. However, harsh application scenarios are putting forward even stringent requirements for the mechanical performances and environmental compatibility of PBIA fibers. Strengthening lateral interactions between polymer chains are approachable methods but ongoing challenges to obtain PBIA fibers with high‐performance. This work develops a novel holey reduced‐graphene‐oxide (HrGO)/PBIA composite fiber with a scaffolded structure, in which the HrGO plays a role of clamp to effectively band plentiful PBIA chains through the in‐plane holes. A small amount of HrGO (0.075 wt%) is able to improve the tensile strength and Young's modulus of HrGO/PBIA fibers by 11.5% and 8.3%, respectively. The small amount of well dispersed HrGO improves the crystallinity and serves as the topological constraint that enhances the lateral interaction of the PBIA chains, which is unveiled by the wide‐angle X‐ray scattering and the coarse‐grained molecular dynamics simulations. In addition, the favorable compatibility of HrGO/PBIA fibers in complex application scenarios is demonstrated by the dynamic and cyclic‐loading measurements.

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“…Inorganic rigid nanofillers such as nano-SiO 2 and nanocarbon materials are widely used to reinforce polymers owing to their good mechanical properties. [11][12][13][14][15][16][17][18] However, owing to the rigidity of the inorganic fillers, brittle failures often occur in reinforced polymer composites; thus, a limited toughness is obtained. Studies on organic fillers are required to solve the problem of toughening of materials.…”

Section: Introductionmentioning

confidence: 99%

All‐Organic Filler with Fractal Structure for Reinforcement and Toughening of Aromatic Polyamide Film

Gao

et al. 2022

Macro Materials & Eng

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The simultaneous enhancement in strength and toughness seems to be an intrinsic contradiction in multiple material designs, including the structural regulation of polymer composites. In this study, benzimidazole-containing aromatic-polyamide thin films are used as typical rigid polymers with high strength and modulus to study their strength-toughness collaboration via a multi-scaled stress distribution mechanism. A fully organic deformable filler with a fractal structure is designed. Utilizing the large-scale deformability of the filler to absorb the energy and dislocation node structure of the filler to disperse the stress, the composite thin film is significantly toughened, which is reflected in the elongation at break increased by 144.9% and energy at break increased by 154.2%. In addition, the specific fractal structure of the filler provided a larger interaction area, which enhanced the interfacial bonding force and improved the strength of the film. Moreover, owing to the larger interaction area provided by the fractal structure, the interface bonding force between the filler and matrix due to the similar chemical structures is further improved and the tensile strength of the composite thin film is increased from 389.2 ± 11.98 to 426.2 ± 4.41 MPa.

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Construction of dendritic structure by nano-SiO2 derivate grafted with hyperbranched polyamide in aramid fiber to simultaneously improve its mechanical and compressive properties

Cited by 22 publications

References 39 publications

Rivet-Inspired Modification of Aramid Fiber by Decorating with Silica Particles to Enhance the Interfacial Interaction and Mechanical Properties of Rubber Composites

Rivet-Inspired Modification of Aramid Fiber by Decorating with Silica Particles to Enhance the Interfacial Interaction and Mechanical Properties of Rubber Composites

Holey Reduced Graphene Oxide Scaffolded Heterocyclic Aramid Fibers with Enhanced Mechanical Performance

All‐Organic Filler with Fractal Structure for Reinforcement and Toughening of Aromatic Polyamide Film

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