Outstanding Comprehensive Properties Research Articles

Effect of abnormally oriented grains on the ferroelectric properties of Al0.65Sc0.35N thin films

The wide bandgap wurtzite Al1-xScxN ferroelectric material is compatible with semiconductor processes and offers advantages such as high remanent polarization (Pr) and high-temperature stability. To clear the relationship between the structure zone model (SZM), abnormally oriented grains (AOGs) and the ferroelectric properties, the Al0.65Sc0.35N films were prepared at various sputtering pressures (0.32–0.90 Pa) and substrate temperatures (200–500 ℃) on low resistance n+-(111) Si substrate by the radio frequency dual-source reactive magnetron sputtering method using Al and Sc targets under pure N2 gas. The introduction of AOGs facilitates compressive stress reduction and promotes ferroelectric switching. However, excessive AOGs will damage the (002) orientation, leading to loss of ferroelectricity. The Al0.65Sc0.35N films synthesized under a sputtering pressure of 0.52 Pa and a substrate temperature of 400 ℃ exhibited a lower leakage current at high electric field, with a Pr value of 154.3 μC/cm2 and a negative coercive field (Ec-) of 3.1 MV/cm at a testing frequency of 1 kHz. The outstanding comprehensive properties support the large potential of Al1-xScxN ferroelectric material for high-performance FeRAM devices.

A novel BCC-L21-BCC hierarchical heterostructure high entropy alloy with excellent corrosion resistance and mechanical properties in as-cast state

In this paper, a novel as-cast CrFeNiAl0.35Si0.1Ti0.1 high entropy alloy (HEA) with micron-to-nano hierarchical heterostructure was designed, and its microstructure, mechanical properties and corrosion resistance have been systematically investigated. It is found that, this novel HEA exhibits well-dispersed L21 phases with various sizes from micron-scale to nano-scale in the BCC matrix, while nano-sized BCC lamellas could also emerge in the L21 phase with large diameter. Moreover, this HEA exhibits not only excellent corrosion resistance in 3.5 wt.% NaCl solution that close to super-stainless steels, but also high mechanical properties combining yield strength of 1712±56 MPa, compressive plasticity of 21.2%±0.5% and hardness of ∼560 Hv. Such outstanding comprehensive properties for this HEA are possibly resulted from the complex hierarchical BCC-L21-BCC heterostructure with stable passive film and low diversity in work function between different phases. This work provides a novel route in the development of high-performance corrosion-resistant HEAs for structural and coating applications.

A facile strategy for preparing low dielectric polybutadienes with ultra-low dielectric loss and enhanced thermal stability

With the rapid development of high speed and high frequency communication, organic low dielectric (low-k) materials with both ultra-low dielectric constant (Dk) and ultra-low dielectric loss (Df) are urgently required to ensure signal transmission speed and reliability. 1,2-polybutadiene (1,2-PB) is renowned for its excellent dielectric properties, making it used in high-frequency printed circuit boards (PCBs). However, its poor thermal stability and mechanical properties hinder its application which requires persistent stability. To address this issue, a series of thermal-crosslinkable benzocyclobutene (BCB)-modified PBs were synthesized through a hydrosilylation reaction. These cured PBs exhibited significantly enhanced thermal stability with the glass transition temperature (Tg) exceeding 400 °C. In particular, they displayed ultra-low Dk (2.32–2.41) and ultra-low Df (<0.001). It was found that the properties of cured PBs were related to BCB loadings. Among the cured polymers, PB-g-B30 demonstrated the optimal dielectric properties with a Dk of 2.34 and a Df of 3.6 × 10−4. Subsequently, a PB-g-B30/glass fiber laminate was fabricated, exhibiting superior dielectric and comprehensive properties when compared to commercial low-k laminates. This study provides a facile method to develop PBs with ultra-low Dk and Df and enhanced thermal stability. The outstanding comprehensive properties indicate their potential as low-k materials in high-frequency communication applications.

Synergistic Enhancement of Mechanical Properties and Electrical Conductivity of Immiscible Bimetal: A Case Study on W–Cu

Immiscible bimetal systems, of which tungsten–copper (W–Cu) is a typical representative, have crucial applications in fields requiring both mechanical and physical properties. Nevertheless, it is a major challenge to determine how to give full play to the advantages of the two phases of the bimetal and achieve outstanding comprehensive properties. In this study, an ultrafine-grained W–Cu bimetal with spatially connected Cu and specific W islands was fabricated through a designed powder-mixing process and subsequent rapid low-temperature sintering. The prepared bimetal concurrently has a high yield strength, large plastic strain, and high electrical conductivity. The stress distribution and strain response of individual phases in different types of W–Cu bimetals under loading were quantified by means of a simulation. The high yield strength of the reported bimetal results from the microstructure refinement and high contiguity of the grains in the W islands, which enhance the contribution of W to the total plastic deformation of the bimetal. The high electrical conductivity is attributed to the increased mean free path of the Cu and the reduced proportion of phase boundaries due to the specific phase combination of W islands and Cu. This work provides new insight into modulating phase configuration in immiscible metallic composites to achieve high-level multi-objective properties.

Biocompatibility and osteoinductivity of biodegradable Zn-Li-Ca ternary alloys for bone regeneration: In vitro and in vivo studies

Bone defects caused by trauma, fracture-related infection, congenital malformations, and tumor resection remain significant challenges to human health. Biodegradable Zn-based alloys have been acknowledged for their outstanding comprehensive properties in addressing bone defects, offering adequate mechanical support, mild degradation rate, and satisfactory biosafety. In this study, Zn–0.8Li-0.1Ca alloy was fabricated and comprehensively evaluated both in vitro and in vivo for their properties. The Zn-0.8Li-0.1Ca alloy demonstrated an ultimate tensile strength of 251.07 ± 9.59 MPa and an elongation of 18.89 ± 1.26 %. Electrochemical and in vitro degradation tests showed that there was a mild degradation rate (21.94 ± 2.26 μm/year) and uniform degradation behavior in the Zn-0.8Li-0.1Ca alloy. Real-time PCR analysis revealed that the Zn-0.8Li-0.1Ca alloy effectively upregulated the expression levels of osteogenesis-related genes (ALP, COL-1, OCN, and RUNX-2). Micro-CT and histological evaluations demonstrated that bone regeneration within the Zn-0.8Li-0.1Ca alloy scaffold was significantly superior to that of pure Ti in repairing rat femoral condyle defects. Therefore, the biodegradable Zn-0.8Li-0.1Ca ternary alloy displayed satisfactory mechanical properties, degradation behavior, biocompatibility, and osteogenic activity, positioning it as a promising candidate for bone repair treatment.

AlxHfTaTi (0≤x≤0.5) refractory medium entropy alloys with excellent room-temperature tensile properties

Refractory high entropy alloys are strong candidates for high-temperature structural materials, because of their high strength, excellent thermal stability and exceptional softening resistance under high-temperature. However, majority of the existing refractory high entropy alloys are seriously limited in widespread application, due to their severe brittleness at room temperature. In this study, we proposed a novel AlxHfTaTi body-centered cubic (BCC) refractory medium entropy alloy with remarkable strength-ductility combination at room temperature. Adjusting the atomic ratio of Al (from 0 to 0.5 at.%), we investigated the effect of Al on the structure-property characteristics of the alloy under as-cast as well as cold-rolled and annealed conditions. Compared with the as-cast samples, the rolled and annealed samples exhibit more excellent tensile properties due to the remarkable reduction of grain size resulted from recrystallization. The Al0.3HfTaTi sample annealed for 5 min exhibits outstanding comprehensive properties at room temperature, with a yield strength higher than 1000 MPa and a fracture elongation of up to 24 ± 1 %, respectively. Quasi in-situ EBSD analysis results reveal that, during tensile deformation, the grain size has a significant effect on the grain rotation and dislocation gliding. Small grains are more likely to initiate multiple slip bands, promoting the synergistic effect of grain rotation and dislocation gliding, thereby improving the ductility of the alloy. Our findings can provide new ideas for the development of refractory high entropy alloys with outstanding room-temperature tensile properties.

Microstructure and performance modification of PVDF ultrafiltration membrane via adjusting the composition of coagulation Bath

AbstractIn this paper, the effect of the composition of a nonsolvent bath on the physicochemical properties of the polyvinylidene fluoride (PVDF) ultrafiltration membranes were comprehensively investigated using the nonsolvent‐induced phase separation method. Three additives (ethanol, glycerol, or NaCl) were added to the water coagulation bath respectively to obtain different membranes. It was found that the microstructure of the membranes changed from finger‐like structure to the sponge‐like structure with the increase of additives concentration, which successfully improved the retention and mechanical properties of the membranes. In addition, the membrane surface became smoother and more hydrophilic. The membrane fabricated in 30 wt% glycerol bath exhibited outstanding comprehensive properties of retention and anti‐fouling, with a water flux of 243.5 L/(m2 h), a bovine serum albumin rejection of more than 90%, and a flux recovery rate of 97%. From mechanism analysis, the addition of ethanol, glycerol, or NaCl to the coagulation bath altered the thermodynamic stability of the polymer system, and slowed down the rate of solvent and nonsolvent diffusion from a kinetic perspective. This research provides important clues for optimizing the membrane properties, such as flux, rejection, and strength.

Thermally conductive high‐voltage insulation composites with outstanding comprehensive properties through particle grading design

AbstractIn order to meet the requirements of practical applications, the comprehensive performance of thermally conductive high‐voltage insulating composites is worth evaluating. Guided by the particle packing theory, spherical alumina particles with different particle size distributions were compounded and filled into low‐density polyethylene (LDPE), and the thermal conductivity (TC) and mechanical breakdown of different compound systems were systematically investigated. The results show that the particle grading design of small‐particle filled composites has better comprehensive properties than that of single‐scale or large‐particle filled composites, which proves the superiority and feasibility of particle grading design. The 110–40 wt.% composite has a higher TC (0.47 W/(m K)) compared with LDPE, while maintaining excellent insulation properties (227 kV/mm) and mechanical properties (tensile strength of 10 MPa and elongation at break of 720%). Finally, studies on the application of composite materials in the field of thermal management and ice melting of steel‐core aluminum insulated wires were applied, and both studies show good prospects for the applications of Al2O3/LDPE thermal conductive high‐voltage insulation composites.

Conductive Robust Interfaces with Fluoro-Borate Based Electrolyte Additive for 4.6V Well-Cycled LiNi0.90Co0.06Mn0.04O2||Li Batteries.

Owing to the outstanding comprehensive properties of high energy density, excellent cycling ability, and reasonable cost, Ni-rich layered oxides (NCM) are the most promising cathode for lithium-ion batteries (LIBs). To further enhance the specific capacity of Ni-rich layered oxides, it is necessary to increase the cut-off voltage to a higher level. However, a higher cut-off voltage can lead to substantial structural changes and trigger interface side reactions, presenting significant challenges for practical applications (cycle life and safety). Herein, to solve above issues, tris(hexafluoroisopropyl)borate (TFPB) is introduced as a high voltage electrolyte additive for LiNi0.90Co0.06Mn0.04O2 cathode. Based on detail in situ/ex situ characterization, this study proves that TFPB forms a protective solid-state interphase (SEI) layer on the Li-anode. Additionally, derivatives of TFPB are easily oxidatively decomposed to create a dense cathode electrolyte interphase (CEI) film on the cathode. This CEI film effectively prevents the continuous oxidation of the electrolyte and mitigates the adverse effects of HF on the battery. Benefit from the protective SEI and CEI layer, the LiNi0.90Co0.06Mn0.04O2||Li battery with a TFPB-containing electrolyte maintains an unprecedented level of performance, with a capacity retention of 89.1% after 100 cycles under the ultrahigh cut-off voltage of 4.6V (vs Li/Li+).

Impalement-Resistant, Mechanically Stable, and Anti-Static Superamphiphobic Coatings Enabled by Solvent Regulation and Their Application in Anti-Icing.

Superamphiphobic coatings have good application prospects in many fields but are limited by their low impalement resistance, weak mechanical stability, and easy adhesion of tiny droplets. Here, impalement-resistant, mechanically stable, and antistatic superamphiphobic coatings were fabricated by spraying a mixture of conductive carbon black (CB), silicone-modified polyester adhesive/fluorinated SiO2 microspheres onto Al alloy. The microspheres were obtained by adhesive phase separation and the binding of fluorinated SiO2 to them. The morphology, superamphiphobicity, impalement resistance, and mechanical stability of the coatings could be regulated by using solvents with different boiling points. As a result, the coatings simultaneously exhibited outstanding mechanical stability, impalement resistance, and superamphiphobicity. The addition of conductive CB endowed the coatings with good antistatic and tiny droplet repellent properties. In addition, the coatings exhibited good anti-icing properties due to the steady air layer at the solid-liquid interface and the very small contact area between them. We suppose that the coatings are very promising for practical application in various fields, including anti-icing, due to their outstanding comprehensive properties and simple preparation process.

Study on the rapid synthesis of high-entropy carbonitride powder and its remarkable hardening effects on cemented carbide tool materials

As a novel high-entropy ceramic material with a multi-cation and multi-anion sublattice structure, high-entropy carbonitride ceramics (HECNs) have exhibited outstanding comprehensive properties and attracted increasing attention. In this study, a new WC-based cemented carbide material reinforced by high-entropy carbonitride (Ti0.2W0.2Mo0.2V0.2Nb0.2)(C0.7N0.3) (marked as HECN) was successfully fabricated by vacuum hot-pressed sintering. The mutual constraints between hardness and fracture toughness in extant WC-Co cemented carbide tool materials and their deficient high-temperature mechanical properties were effectively addressed. Moreover, for the low efficiency of the traditional carbothermal reduction nitridation, a novel method for rapidly preparing HECN powder was firstly proposed, namely the microwave-assisted carbothermal reduction nitridation, which could accelerate the heating rate and shorten the holding time. Single-phase HECN powder was successfully synthesized by this method, and the impacts of varying HECN content on the room and high-temperature mechanical properties of WC-based cemented carbide were investigated combined with the microstructure analysis by XRD\\SEM. The results revealed that HECN effectively inhibited the grain growth of WC in cemented carbide, and the refined WC grains provided a high-volume fraction of grain boundaries, which prevented dislocation movement and increased the hardness. With the optimized HECN content of 10 wt%, the Vickers hardness and fracture toughness of WC-HECN-Co composite reached 21.58 ± 0.36 GPa and 12.27 ± 1.17 MPa∙m1/2 respectively. Furthermore, WC-10HECN-10Co composites possessed outstanding high-temperature hardness and maintained a high hardness value of 13.16 ± 0.30 GPa at 800 °C, 37% higher than that of WC-10Co. The findings of this research hold significant practical implications for applying cemented carbide cutting tools in high-speed dry cutting.

Investigation on performance and durability of bone glue and crumb rubber compound modified asphalt and its mixture

Rubberized asphalt has excellent environmental protection and road property, but its storage stability needs improvement. Existing studies have found that the compound modification of bone glue (BG) and crumb rubber (CR) can effectively raise the separation of CR in asphalt, along with outstanding comprehensive properties. Therefore, this paper explores the micro mechanism, aging performance, and engineering characteristics of bone glue and crumb rubber compound modified asphalt (BCCMA). First, the adhesion of BCCMA was evaluated by a static drop test, and a scanning electron microscope test revealed its microscopic surface morphology. Second, three aging indices using rheological tests were developed to evaluate the aging resistance ability of the BCCMA. Lastly, the road performance of the bone glue and crumb rubber compound modified asphalt mixture (BCCMAM) was investigated. The results indicate that the surface energy of BCCMA (15% BG and 20% CR) increased by 52.39% compared to the neat asphalt. BG can improve asphalt's aging resistance, and the BCCMA with a BG content of 10% has the lowest aging sensitivity. BG promotes the dispersion uniformity of CR in neat asphalt, making the low-temperature crack resistance, high-temperature stability, and water stability of BCCMAM better than rubberized asphalt mixture.

Colored Si3N4 ceramics via constructing Nd3+ doped core‐shell structures

AbstractSi3N4 ceramics have been attractive casing materials for electronics devices under the 5th generation mobile communication technology because of its outstanding comprehensive properties. However, single color cannot meet the needs of most consumers. Here, a typical strategy, involving forming core‐shell structures by utilizing Nd2O3‐MgO‐YAG system, is proposed to rich color. Scanning transmission electron microscope‐energy dispersive X‐ray spectrometry results confirm the presence of core‐shell structures in the silicon nitride matrix, and the core is pore and the shell is Nd‐enriched liquid phase. The Nd‐rich core‐shell structure as the color center makes the silicon nitride appear cyan or blue.

Achieving superior mechanical properties and biocompatibility in an O-doping TiZrNb medium entropy alloy

The present work aimed to develop a novel medium entropy alloy (MEA) with superior mechanical properties and biocompatibility for the metallic-bioimplant application. A series of (TiZrNb0.7)100-xOx (x = 0, 0.5, 0.75 at. %) MEAs were carefully designed and prepared. The microstructure, mechanical properties, corrosion resistance, and biocompatibility were investigated in detail. Single-phase body-centered cubic (BCC) structural (TiZrNb0.7)100-xOx MEAs consisted of as-cast dendritic morphology. Interestingly, the yield strength and ductility of (TiZrNb0.7)100-xOx MEAs were improved simultaneously with their O concentration. The (TiZrNb0.7)99.25O0.75 MEA had optimal mechanical properties, exhibiting a yield strength of 911 ± 11 MPa, a fracture elongation of 16.1 ± 0.7%, and an elastic modulus of 70.5 ± 1.2 GPa. According to the potentiodynamic polarization and cell culture experiment, the (TiZrNb0.7)99.25O0.75 MEA exhibited superior corrosion resistance and biocompatibility, equivalent to the commercially pure titanium (CP-Ti). These findings provide a paradigm for achieving outstanding comprehensive properties in MEA via O doping.

Epoxy polymer using tannic acid as the green crosslinker, exhibiting globally enhanced mechanical, insulating and thermally conductive properties

Epoxy resin polymers are characteristic of outstanding mechanical and insulating performances, establishing them as critical insulating components in modern electronic devices and power systems. Bio-based polyphenol organics, a substitute for petroleum-based anhydride to cure epoxy resins, can restrict the waste of non-recyclable petroleum resources, meeting the current demand for sustainable development. However, due to rapidly developing industrial demands, such epoxy polymers using bio-based organics as curing agents need further exploration to realize excellent comprehensive properties. Herein, epoxy resin with significantly high crosslink density and few intermolecular defects has been successfully prepared using 1,4-butanediol diglycidyl ether-modified tannic acid as the green crosslinker. The most outstanding comprehensive properties have been realized by adjusting the mass ratio of 1,4-butanediol diglycidyl ether to bisphenol-A epoxy resin to 3: 10. Specifically, the tensile strength, elongation at break, breakdown strength and intrinsic thermal conductivity of tannic acid cross-linked epoxy resin reached 67.6 MPa, 5.4%, 29.8 kV/mm and 0.59 W/(m·K), respectively, globally higher compared with epoxy/anhydride system, which is attributed to the tighter molecular structure, fewer molecular entanglements and less internal defects. Therefore, this work provides a simple and feasible method for preparing tannic acid cross-linked epoxy resin polymers with excellent comprehensive properties, offering potential application value.

Microstructure, mechanical properties and corrosion resistance of an as-cast fine-structure Cr-Fe-Ni-Al-Si high entropy alloy with Mo addition

A novel Cr-Fe-Ni-Al-Si-Mo high-entropy alloy (HEA) is designed and prepared by arc-melting. This as-cast HEA consists of fine FCC sideplates, as well as BCC phase in the inter-sideplate region containing well-dispersed nanoprecipitates, which is possibly derived from solid-state phase transformation. It exhibits excellent mechanical properties including ultimate tensile strength of > 1 GPa and plasticity of ∼15.5%. It also shows superb corrosion resistance higher than typical stainless steels in 3.5 wt% NaCl solution. Our work indicates that this low-cost HEA has outstanding comprehensive properties in as-cast state, and Mo plays an important role in microstructure, mechanical properties and corrosion resistance of this series of HEAs, which is beneficial for their further applications under complex and harsh environments.

Linker engineering of larger POSS-based ultra-low-k dielectrics toward outstanding comprehensive properties

Low-dielectric-constant (low-k) materials are an indispensable part of microprocessors as they can alleviate electronic crosstalk, charge build-up, and signal propagation delay. However, existing low-k materials usually have k values higher than 2 and inferior thermo-mechanical properties, which restrict the development of microelectronic devices. Although we have recently discovered that larger polyhedral oligomeric silsesquioxanes (POSS) are useful building blocks for fabricating advanced ultra-low-k materials, it remains to be seen whether a POSS cage and linker could be leveraged to tune the structure-property of the materials and create ultra-low-k materials with improved comprehensive properties. Herein, we propose a series of POSS-based hybrid materials (i.e., c-TnPBn and c-TnFn, n = 8, 10, and 12) that consist of distinct POSS cages and linkers. When the linker is kept identical, the gradual enlargement of the POSS cage enhances the porosity/free volume fraction of materials, resulting in quasi-linearly reduced k values for the resulting materials (k = 1.93 for c-T12PB12, 2.14 for c-T12F12). Meanwhile, the materials’ comprehensive properties can be significantly improved by increasing the POSS cage size or varying the linker’s length and type. As a result, ultra-low-k materials with good processability, low surface roughness (< 0.40 nm), excellent thermostability (> 480 °C), mechanical properties (elastic modulus > 2.5 GPa), and hydrophobicity have been obtained, and the low-k values can be maintained under high temperature (e.g., 300 °C) and wet condition. This work reveals the critical contribution of POSS cage size and linker to the structure and properties of POSS-based low-k materials and offers promising materials for the future of the microelectronic industry.

Copper-Based Composite Coatings by Solid-State Cold Spray Deposition: A Review

Copper (Cu)-based composite coatings have been widely applied in all kinds of important industry fields due to their outstanding comprehensive properties. The preparation temperature of a composite coating is the key factor affecting the properties, so the cold spray (CS) technology is characterized by low-temperature solid-state deposition, which ensures its emergence as the most promising technology for preparing the Cu-based composite coatings. In this paper, first, the principle of CS technology and the deposition mechanism of the coatings are introduced. On this basis, the deposition mechanism of Cu-based metal/ceramic composite coatings is further explored. Secondly, the effects of key CS process parameters (particle velocity, particle morphology, and substrate state) on the quality of the Cu-based composite coatings are summarized, and the current research status of cold-sprayed Cu-based composite coatings in the fields of corrosion resistance, wear resistance, self-lubricating properties, and electrical conductivity is reviewed. Moreover, the improvement of the performance of Cu-based composite coatings by various post-process treatments of coatings, such as heat treatment (HT) and friction stir processing (FSP), is elaborated. Finally, the future development of Cu-based composite coatings and CS technology is prospected.

Hygrothermal aging behavior and mechanical degradation of ramie/carbon fiber reinforced thermoplastic polymer hybrid composites

Hybrid multi-fibers reinforced thermoplastic polymer composites with reasonable structure design can maximize their physical or chemical properties to obtain outstanding comprehensive properties. To broaden the industrial applications and understand the properties of natural ramie fiber product, the hygrothermal aging behavior and flexural properties of the ramie fiber and carbon fiber (R/C) reinforced polyethylene terephthalate glycol hybrid composites with different lay-up sequences were investigated with 90-days water aging. The finite element analysis model was established to reveal the moisture diffusion evolution and the hygrothermal aging behavior. After 90-days aging, the water uptakes of the [R/R/C/C]s, [R/C/R/C]s, [C/R/C/R]s, [C/C/R/R]s hybrid composites are 2.72%, 2.41%, 2.38%, 2.36%, respectively. The results simulated with the finite element analysis show good consistency with the experimental results of moisture absorption and reveal the different moisture diffusion evolution process of the R/C hybrid composites. The cross-sectional contact angles of the hybrid composites is obviously less than surface contact angles. According to change the lay-up sequences, the flexural modulus of the unaged [C/R/C/R]s and [C/C/R/R]s composites can improve 0.98 times and 1.43 times than that of the unaged [R/R/C/C]s composite. After 90-days aging, the flexural strengths of the [R/R/C/C]s, [R/C/R/C]s, [C/R/C/R]s, [C/C/R/R]s composites decrease with 34.2%, 36.9%, 25.2%, 25.8%, respectively. Furthermore, the fracture modes of the hybrid composites before and after hygrothermal aging vary from brittle fracture to ductile fracture. The knowledge gained in this study will benefit future design optimization of natural fibers hybrid composites and their engineering applications.

Anion exchange membranes based on poly (styrene‐b‐(ethylene‐co‐butylene)‐b‐styrene) grafted poly (2,6‐dimethyl‐1,4‐phenylene oxide)

AbstractPoly (styrene‐b‐(ethylene‐co‐butylene)‐b‐styrene) (SEBS) has been widely studied in the field of anion exchange membranes (AEMs) due to its superior flexibility and chemical stability, but the poor dimensional stability of functionalized SEBS restricts its further application. Thus, we adopt an effective strategy to reinforce AEMs based on SEBS via grafting poly (2,6‐dimethyl‐1,4‐phenylene oxide) (PPO) using Williamson ether synthesis reaction. With the addition of PPO, grafted membranes exhibit outstanding comprehensive properties, such as mechanical strength, chemical stability, especially dimensional stability. SEBS‐PPO‐QA‐1 grafted membrane with the highest content of PPO showed the best tensile strength (20.54 MPa), and restrained swelling behavior (swelling ratio of 4.81% at 25°C). Moreover, the conductivity retention of SEBS‐PPO‐QA‐1 grafted membrane is up to 92.71% at 80°C after 10 days alkaline treatment. The ion exchange capacity of SEBS‐PPO‐QA‐3 grafted membrane is 1.719 mmol/g, and the ionic conductivity of SEBS‐PPO‐QA‐3 grafted membrane reach 58.27 mS/cm at 80°C and 25.53 mS/cm at 20°C. Therefore, the SEBS‐PPO‐QA‐X grafted membranes, which combine the advantages of PPO and SEBS, are promising in AEM application.