Mechanically robust, highly toughened, corrosion and impact resistant epoxy/silica nanocomposites by UV curing 3D printing technology DOI

Changbao Zhao,

Yufeng Chen, Rui Cai

et al.

Advanced Composite Materials, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 22

Published: Dec. 26, 2024

In this paper, a photosensitive resin was successfully synthesized using epoxy as matrix and the effect of nanosilica on its properties investigated. Micromorphology analyses show that has good dispersion strong interaction with matrix. Additionally, finite element model developed to predict tensile performance nanocomposite under high-strain loads. Molecular dynamics simulations demonstrated favorable binding energy between resin. The effects fracture toughness release rate resins were investigated load-enhanced test method. results showed addition 1.0 wt.% particles increased from 0.45 MPa m1/2 0.79 m1/2, 248.3 J/m2 555.7 J/m2; compared neat resins, incorporation impact strengths by 26.8% 49.2%, respectively. used improve strength 49.2% respectively Electrochemical corrosion analysis resin/nanosilica composites have excellent resistance. Under different environments acid, alkali, salt, 1 in composite led an increase voltage 0.023 V, 0.004 0.1 V current density decreased 1.39 × 10−6 A/cm2, 0.525 10−4 2.57 On basis, independently synthesised 0.01 mm printing accuracy.

Language: Английский

The Influence of Two Spinning Processes of T800 Grade Carbon Fibers on the Mechanical Properties of Thermoplastic Composite Material DOI Open Access
Xu Cui,

Xuefeng Sun,

Weiguo Su

et al.

Coatings, Journal Year: 2025, Volume and Issue: 15(1), P. 90 - 90

Published: Jan. 15, 2025

Two types of T800 grade carbon fibers, produced using distinct spinning processes, were utilized to fabricate thermoplastic prepregs via the hot melt method. These subsequently employed produce composites. A universal testing machine was used assess tensile, bending, and interlaminar shear properties composites, evaluating impact two different processes on their mechanical characteristics. The experimental results indicate that dry spray wet fiber (T800-DJWS) exhibits a smoother surface, more regular cross-section, uniform distribution compared (T800-WS), enhancing prepreg preparation T800-DJWS/PAEK composite demonstrates tensile strength is 706 MPa higher than T800-WS/PAEK composite, while latter bending modulus 31 GPa former.

Language: Английский

Citations

0
Enhanced mechanical and anti‐corrosion performance of polyurea nanocomposite coatings via amino‐functionalization of boron carbide nanosheets DOI Creative Commons
Qingshi Meng, Yuxin Fu, Yu Dong

et al.

Polymer Composites, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 28, 2025

Abstract Polyaspartate polyurea (PAEp) generally has insufficient protective properties and limited chemical corrosion resistance. To address these limitations, boron carbide (B 4 C) nanosheets were modified using mechanochemical surface grafting with amino functional groups to create KP‐B C. These incorporated into PAEp produce nanocomposite materials. The addition of 0.5 wt% C significantly enhanced the mechanical nanocomposites. Tensile strength increased by 127.12%, while elongation improved 45.08%. impact resistance material was also notably improved. prepared nanocomposites demonstrated strong resilience against environmental factors such as moisture, heat, UV exposure, friction. composite coatings particles had anticorrosion compared unmodified PAEp. Electrochemical tests have shown that provide a robust coating even after prolonged immersion in corrosive liquids (e.g., NaCl, NaOH, H 2 SO ). This improvement is attributed uniform dispersion matrix effective barrier aggressive substances. study highlighted importance adding reinforcing phase modification order achieve high performance multifunctional coatings. Highlights at break 127.12% 45.08%; Enhanced on Al epoxy substrates; Exceptional abrasion resistance, reducing wear index 1.18%.

Language: Английский

Citations

0
Polyvinyl Alcohol Composite Films Containing Flame-Retardant DOPO-VTES and α-ZrP DOI Open Access

Jiayou Xu,

Minyi Luo,

Riyan Lin

et al.

Polymers, Journal Year: 2025, Volume and Issue: 17(8), P. 1011 - 1011

Published: April 9, 2025

Polyvinyl alcohol (PVA) is used in various fields; however, its highly flammable property greatly limits application. In order to improve the flame-retardant properties of PVA, one method by adding flame retardants directly, while another through grafting, cross-linking and hydrogen bonding. A retardant, 9, 10-dihydro-9, 10-oxa-10-phosphaphenanthrene-10-oxide (DOPO)-vinyltrimethoxysilane (VTES), was synthesized addition reaction a P–H bond on DOPO unsaturated carbon–carbon double bonds VTES. Then, DOPO-VTES zirconium phosphate (α-ZrP) were blended with PVA cast film, which grafted onto hydroxyl group molecular structure PVA; α-ZrP as cooperative agent DOPO-VTES. The cone calorimetry test (CCT) showed significant reduction both heat release rate (HRR) total (THR) for films compared pure PVA. Additionally, thermogravimetric analysis (TGA) revealed higher residual char content than These findings suggested that combination could retardancy mode action at play possibly acted mainly gas-phase yielded PO radical; VTES produced silicon dioxide (SiO2), thermal insulator; catalyzed carbonization By combining α-ZrP, continuous dense carbon layer formed, effectively inhibited oxygen exchange, resulting effect. It expected have broad development prospect potential fields packaging materials, electronic appliances, lithium-ion battery separators.

Language: Английский

Citations

0
Hierarchically building flame retardant and flexible electromagnetic interference shielding composites with tunable mechanism DOI
Yongqian Shi, Shijie Wu, Jie Chen

et al.

Journal of Material Science and Technology, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

Citations

0
Synergistic Flame Retardancy of Cross-Linked Kraft Lignin and Black Phosphorus on Tpu: Mechanism and Performance DOI

Yihui Xia,

Xiang Zhang, Liangliang An

et al.

Published: Jan. 1, 2025

Language: Английский

Citations

0
N-P doped lignin flame retardant: preparation and application for thermoplastic polyurethane DOI
Sihai Zhao, Qian Zhang,

SU Zheng-jun

et al.

International Journal of Biological Macromolecules, Journal Year: 2025, Volume and Issue: unknown, P. 143593 - 143593

Published: April 1, 2025

Language: Английский

Citations

0
EP‐modified flame retardant: A new strategy for synergistically enhancing the flame retardancy and mechanical properties of TPU DOI

Fenghao Hao,

Linxuan Han,

Yajun Chen

et al.

Journal of Vinyl and Additive Technology, Journal Year: 2025, Volume and Issue: unknown

Published: May 1, 2025

Abstract In this article, EP‐SMAE was synthesized by reacting the reactive groups of bisphenol A diglycidyl ether (DGEBA) with phosphorus‐containing Schiff base derivatives (SMAE) to enhance fire safety thermoplastic polyurethane (TPU). The experimental results demonstrated that TPU/5EP‐SMAE achieved a Limiting Oxygen Index (LOI) value 27.8%, reaching UL 94 V‐0 classification. Further addition improves anti‐drip performance TPU, benefit SMAE alone does not provide. EP modification promotes formation denser and more ordered char layer while preserving SMAE's gas‐phase flame inhibition. demonstrates biphasic retardancy significantly alleviates negative impact on mechanical properties. tensile strength TPU/5EP‐SAE 18.9 MPa, which is higher than 8.8 MPa TPU/5SMAE. This study presents an effective method TPU its Highlights enhanced resistance in TPU. reached LOI passing rating. Adding 15EP‐SMAE inhibited dripping exerted dual‐phase inhibition effect. reduced adverse

Language: Английский

Citations

0
Enhancing the mechanical, conductive, and chemical resistance properties of SEBS nanocomposites using graphene nanoplatelets DOI Creative Commons

Shuangshan Li,

Xinyu Liu, Zeyu Yang

et al.

Polymer Composites, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 17, 2025

Abstract Styrene‐Ethylene‐Butylene‐Styrene (SEBS) has garnered considerable attention for its excellent stability and aging resistance, yet broader industrial applications require enhanced functionalities, including electrical thermal conductivity, as well chemical resistance. This study investigates the preparation of graphene nanoplatelet (GNP)‐reinforced SEBS/PP/oil (SPO) nanocomposites, with an emphasis on a novel ball‐milled variant ( B ‐SPO/GNP) engineered to improve mechanical strength multifunctional performance. SPO/GNP ‐SPO/GNP nanocomposites were prepared using twin‐screw extrusion injection molding, GNP loadings ranging from 0.5 30 wt%. Comprehensive characterization revealed significant improvements across multiple properties, primarily driven by uniform dispersion GNPs interfacial bonding within matrix. Notably, tensile increased 38.89% in ‐SPO/GNP‐2 compared unreinforced SPO, while ‐SPO/GNP‐20 achieved conductivity 0.415 W/m·K 1.88 × 10 −7 S/cm. In addition, percolation threshold was observed at 17.35 wt% nanocomposites. Enhanced resistance long‐term salt spray corrosion performance attributed formation effective GNP‐based protective barrier. These findings underscore potential durable, high‐performance materials, offering promising platform advanced polymer nanocomposite development demanding applications. Highlights Mechanical ball milling improved interface bonding. showed maximum increase over SPO. Electrical reduced displayed stability. exhibited superior

Language: Английский

Citations

0
A facile approach for enhancing mechanical resilience, and corrosion protection in epoxy coatings using bismuthene nanosheets DOI Creative Commons
Qingshi Meng,

Shuangshan Li,

Fuyuan Guo

et al.

Polymer Composites, Journal Year: 2024, Volume and Issue: 45(16), P. 14966 - 14981

Published: Aug. 3, 2024

Abstract This study presents novel mechanochemical methods for the synthesis and chemical modification of bismuthene nanosheets (BINS) using a high‐speed blender planetary ball milling. Atomic force microscopy (AFM) measurements confirmed successful exfoliation 1.5‐nm BINS. Epoxy/BINS nanocomposites exhibited enhanced mechanical properties, thermal stability, resistance. Chemical via milling improved interface dispersion BINS within epoxy matrix, leading to significant enhancements in performance Compared neat epoxy, at 0.75 vol% m‐BINS, Young's modulus, impact strength fracture toughness K IC were respectively by 30%, 88.6%, 144.4% while these increments 10%, 55.7%, 97.8% pristine BINS‐based nanocomposite. A 3D finite element model test nanocomposite was developed predict its behavior under high‐strain rate loadings; numerical showed high agreement with experimental measurements. Epoxy/m‐BINS demonstrated exceptional resistance, attributed small lateral dimensions which fill spaces between cross‐linked molecules uniformly distribute matrix. These findings highlight crucial role defining properties nanocomposites. Overall, this provides facile scalable method synthesizing modifying bismuthene, showcasing potential developing functional polymer Highlights Bismuthene & modified (m‐BINS) are prepared eco‐friendly method. m‐BINS is ~1.5 nm thick ~0.5 μm wide. shows good strong adhesion Impact epoxy/m‐BINS 88.6% 144.4%. Numerical rate.

Language: Английский

Citations

2
Development of eco-friendly flame-retardant polyurethane using sustainable additives DOI
Ashraf Morsy, Adel El‐marghany, Dipak Rana

et al.

Journal of Molecular Liquids, Journal Year: 2024, Volume and Issue: unknown, P. 126078 - 126078

Published: Sept. 1, 2024

Language: Английский

Citations

2