POLYMER
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2026
·
IF 5.1
Mingchao Liu,Daigang Peng,Ronghua Hu,Chuanbo Cong,Xiaoyu Meng,Qiong Zhou
High-barrier rubber sealing materials are the most widely used sealing components in high-pressure hydrogen storage systems. The gas permeation behavior of rubber materials in high-pressure hydrogen environments is critical to ensuring the long-term sealing reliability and safety of such systems. This study incorporated butyl methacrylate (BMA), methacrylamide (MAM), and zinc methacrylate (ZDMA) into an ethylene propylene diene monomer (EPDM) matrix, establishing covalent crosslinking, grafted covalent integral, covalent-hydrogen bond dual crosslinking, and covalent-ionic dual crosslinking network systems within the EPDM. Among these, the covalent-ionic dual crosslinking network demonstrated the most significant effect, enhancing the composite's hydrogen barrier performance and tensile strength by 22.9% and 227.4%, respectively. The study revealed that microporous defects formed in the matrix when the ZDMA content reached 20 phr. Further investigations revealed that introducing 20 phr hydroxyl-terminated polybutadiene (HTPB) as a plasticizer eliminated these defects by im-proving ZDMA dispersion, further enhancing hydrogen barrier performance and tensile strength to 31.8% and 316.7%, respectively. This study provides a key methodology for optimizing the performance of high-pressure hydrogen sealing materials.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Yufeng Huang,Linghui Tang,Shiwen He,Yue Wang,Yan Dong
We present an enzyme-free glucose sensor for on-site fruit testing based on a Ni-doped triblock hydrogel that couples ionic-channel conduction with hydrogen-bond–reinforced mechanics. In the hydrogel, the NiCl 2 -hydrogel (Ni-HG) pair generates continuous ion pathways that enhance charge transport, while phytic acid establishes multi-point hydrogen bonding and moisture retention, yielding a robust, highly adhesive network that conforms to diverse electrode formats. Within this hydrated, ion-permeable scaffold, Ni 2 + /Ni 3+ (Ni(OH) 2 /NiOOH) functions as a built-in redox mediator, enabling selective, enzyme-free oxidation of glucose in alkaline media. Under optimized conditions, the Ni-HG/GCE sensor delivers a broad linear range of 0.05–6.6 mM, limit detection of 10 μM, with high selectivity against common electroactive species, good repeatability, and reliable performance in real fruit samples. The hydrogel architecture supports rapid amperometric response and stable operation, while its strong adhesion and mechanical compliance facilitate integration with screen-printed electrodes for low-cost, disposable use. These attributes establish a practical platform for fast, sensitive, and selective glucose quantification in fresh produce and point-of-use food monitoring.
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Materials Today
·
2026
·
IF 22
Zhangjie Luo,Yiying Li,Xingyu Liu,Qiang Chen,Chunmei Ding,Jie Zheng,Hong Chen,Jianshu Li
Water-rich hydrogels closely mimic human tissues, offering excellent biocompatibility, yet they often fall short in mechanical strength. Conversely, hydrophobic elastomers possess superior mechanical robustness and durability but typically lack the necessary biocompatibility for many medical applications. Conventional design strategies often struggle to integrate hydrophilic hydrogels and hydrophobic elastomers into a single material entity due to their inherently incompatible natures. Here, we introduce a universal synthesis strategy for simultaneously constructing hydrophobic elastomer and hydrophilic hydrogel networks, creating macroscopically homogeneous, tough elastomer-crosslinked hybrid (TECH) hydrogels. These hybrids exhibit superior mechanical strength and self-recovery, efficient energy dissipation and mechanical enhancement through the reversible deformation of robust elastomer microspheres. Importantly, this design strategy allows for the creation of a diverse family of TECH gels, combining various elastomers and hydrogels, all of which exhibit high sensitivity, durability, and precise motion detection, making them ideal for wearable strain sensors and electronic skin in advanced robotics. This work introduces a straightforward yet innovative approach to develop hybrid elastomer-hydrogel systems, traditionally incompatible, by integrating multiple functionalities of enhanced durability, adaptability, and sensitivity, suitable for flexible electronics, robotics, and biomedical devices, significantly advancing materials design and expanding their application scopes.
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EUROPEAN POLYMER JOURNAL
·
2026
·
IF 6.3
Rongli Zhang,Na Wang,Chunhui Luo
Conductive hydrogels have emerged as promising materials for wearable sensors in recent years. However, most of them have single ability to detect visual or conductive signals and exclude adhesion in water. To address these issues, polymethacrylamide/polyacrylic acid/zirconium ion/carbon quantum dots (PMAm/PAA/Zr 4+ /CQDs) hydrogels were adopted as the conductive matrix, followed by coating a gelatin-tannic acid adhesive layer at the bottom to obtain a Janus hydrogel. The Janus structure endowed the hydrogel with high strength (414 kPa) and strain (150 %), low swelling ratio (4 %), robust wet adhesion (30 N/m), and good sensing performances (with a conductivity of 5.6 S/m, and a gauge factor of 1.77), even after soaking in aqueous environments for a month. The incorporation of Zr 4+ and CQDs endowed dual visual and electrical sensing, which synchronously converted mechanical deformations into resistance variations and high-contrast optical signals. Consequently, it simultaneously provided dual-mode feedbacks for various human motions both underwater and on land. Therefore, the present work opened new avenues for the development of flexible devices for underwater sensing.
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Micromachines
·
2026
·Vol. 17
·期 8
·966
·
IF 3.5
Ke Wang,Mingna Xie,Yuyang Zhao,Jiuyi Wang,Leilei Zeng,Xiaogang Lin,Jie Jayne Wu
Acrylamide (AA) is a common contaminant in foods processed at high temperatures and has attracted significant attention due to its potential neurotoxicity and carcinogenicity. Therefore, the development of a highly sensitive, highly selective sensing technology suitable for on-site detection is of great importance for ensuring food safety. In this study, an aptamer (Apt)-based capacitive AA sensor was developed based on the alternating current electrokinetics (ACEK) effect. The sensor utilizes an aptamer as the biomimetic recognition element, which can specifically recognize AA, thereby enabling quantitative detection. Additionally, a detachable detection fixture and data acquisition system were designed to enhance the detection stability and convenience of sensor. Within the linear range of 1 nmol/L to 10 µmol/L, the sensor response (dC/dt) exhibited a good linear relationship with AA concentration, with a detection limit as low as 0.4235 nmol/L. The sensor exhibits good selectivity toward structural analogs of AA, with a recovery relative standard deviations (RSDs) of less than 5.42% in spiked coffee samples. This portable detection system provides a sensitive and user-friendly tool for the analysis of acrylamide in food and holds great potential for application in food safety.
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ADVANCED FUNCTIONAL MATERIALS
·
2026
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IF 19.9
Guang Zhao,Dongfang Lv,Chang Liu,Changxu Wu,Yifei Liu,Caili Dai,Huazhou Li
Channeling during viscosity reducer flooding in heterogeneous heavy oil reservoirs limits sweep efficiency, while conventional non-selective agents often plug oil-rich zones. To address this, a novel modified petroresin particle (MPRP) with oil–water selectivity was synthesized via graft copolymerization of 2-acrylamido-2-methylpropanesulfonic acid (AMPS) onto dicyclopentadiene-based resin (DCPD). Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy confirmed the successful incorporation of hydrophilic groups while retaining the oil-soluble backbone. MPRP exhibits excellent oil solubility (>84%) and aqueous dispersibility. Under reservoir conditions, temperature and mineralization trigger a 3.6–6.6-fold particle size increase via cohesive expansion, inducing selective plugging in high-permeability water channels to control channeling, while spontaneous dissolution in oil prevents formation damage. Systematic core flooding established the optimal adaptation threshold: 0–50 000 mg/L, 60°C–90°C, 0.1–3.0 D, in situ oil viscosity 1875 mPa·s, and permeability contrast 4.22–11.96. Field-recommended injection parameters increased cumulative recovery from 28.32% to 57.54% in 1.0 D. NMR and micro-visualization revealed that MPRP selectively plugs high-permeability channels, diverting subsequent fluid into low-permeability regions without injectivity impairment. The field test of MPRP achieved effective water production suppression and oil production enhancement, leading to an incremental oil production of 65.22 tons. This work establishes MPRP as a promising agent for conformance control in heavy oil production.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Liu Yang,Baoshan He,Ming Lu,Zhengyong Liang,Yao Liu,Wenjie Ren,Yiwei Xu
The core–shell FeNPs@Pt shows excellent catalytic activity and stability. • Selective detection via thiol–Michael addition without enzymes or aptamers. • The color development is rapid and convenient, taking only 150 s to complete. • The suppression–recovery mechanism amplifies the signal and enhances sensitivity. In this study, we propose an innovative Acrylamide (AA) detection platform based on platinum-coated magnetic iron nanoparticles (FeNPs@Pt). The introduction of a platinum shell not only preserves the intrinsic catalytic properties of FeNPs but also significantly enhances their structural stability and catalytic activity. Compared with traditional antibody–aptamer-based detection methods, this platform employs a thiol–Michael addition reaction combined with a nanocatalyst-mediated cascade colorimetric process. This approach overcomes key limitations of antibody–aptamer technologies, such as high cost and operational complexity, enabling rapid and low-cost detection of AA. The mechanism involves a specific Michael addition reaction between AA and 2,2′-(ethylenedioxy)diethanethiol (EDT), which mitigates the inhibitory effect of EDT on the catalytic activity of FeNPs@Pt. Subsequently, the addition of 3,3′-dimethylbenzidine (TMB) triggers a colorimetric reaction within 150 s, rendering the result visible to the naked eye. This sensing platform exhibits a linear response over the range of 1–200 μM, with a detection limit as low as 0.63 μM. Notably, the FeNPs@Pt–EDT–TMB-based colorimetric detection platform not only provides an efficient and low-cost method for acrylamide detection but also offers an innovative solution for on-site food safety monitoring, demonstrating significant application potential. Download: Download high-res image (108KB) Download: Download full-size image
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Zhengjia Zhu,Hui Chen,Yushuai Bai,Jingjie Zhang,Mingdong Yi,Zhaoqiang Chen,Guangchun Xiao,Chonghai Xu
ZTA/Cr 2 O 3 ceramics were fabricated by gelcasting via gelcasting followed by pressureless sintering. The effects of pH, dispersant content, ball-milling time, solid loading, and Cr 2 O 3 content on slurry rheological properties, green body properties, sintering densification behavior, and mechanical properties were investigated. The addition of Cr 2 O 3 effectively decreased slurry viscosity and improves flowability, facilitating the preparation of high-solid-loading slurries. The green body relative density and flexural strength reached optimum values at a solid loading of 54 vol%, reaching 54.83% and 19.7 ± 0.27 MPa, respectively. After sintering at 1600 °C for 3 h, the optimum mechanical properties were obtained at a Cr 2 O 3 content of 0.4 vol%. The Vickers hardness, flexural strength, and fracture toughness were 17.17 ± 0.26 GPa, 581.22 ± 9.20 MPa, and 6.59 ± 0.32 MPa m 1/2 , respectively. Compared with Cr 2 O 3 -free ZTA ceramics, the hardness, flexural strength, and fracture toughness increased by 5.5%, 17.58%, and 10.75%, respectively. The enhanced mechanical properties are mainly attributed to the synergistic effects of the solid-solution incorporation of Cr 3+ in the α-Al 2 O 3 lattice, the resulting changes in lattice parameters, grain refinement, improved densification, and enhanced stability of the t-ZrO 2 phase. Furthermore, complex-shaped ZTA/Cr 2 O 3 ceramic components were successfully fabricated, showing no visible defects and uniform shrinkage after sintering, providing useful guidance for the near-net-shape fabrication of high-performance ceramic components.
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MACROMOLECULES
·
2026
·
IF 5.7
Jin Yijie,Jia Jiangpeng,Wu Shuwang,Liu Xinyi,Yu Shunfeng,Tang Keqi,Zhao Chuanzhuang
The Hofmeister series provides an empirical description of ion-specific effects, yet a quantitative framework connecting ion-specific hydration to polymer relaxation has remained elusive. Here, we establish such a framework for hydrogen-bonded hydrogels by introducing the dimensionless parameter Bc (the product of the Jones–Dole viscosity B coefficient and salt concentration c ) as a quantitative descriptor of the hydration environment. Using poly(methacrylamide) (PMAm) hydrogels as a model system, we show that the effects of ion identity and salt concentration on polymer relaxation can be quantitatively correlated through Bc . Within the water-abundant regime ( Bc < 0.2), polymer relaxation follows the scaling relationship ln( τ p ) ∼ Bc , whereas this scaling gradually deviates as the system enters the water-depleted regime ( Bc > 0.2). This deviation suggests that polymer relaxation becomes progressively less dependent on hydration-mediated processes as the hydration environment becomes increasingly constrained. The resulting Bc framework provides a quantitative correspondence among ion identity, salt concentration, and temperature through their effects on polymer relaxation. This framework provides a quantitative basis for tuning hydrogel viscoelasticity and shape-memory actuation through salt-mediated modulation of the hydration environment. More broadly, the framework extends the Hofmeister effect from an empirical ion ordering to a quantitative description of relaxation behavior for hydrogen-bonded polymer networks by linking the hydration environment with polymer dynamics.
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JOURNAL OF FOOD SCIENCE
·
2026
·Vol. 91
·期 8
·e71409
·
IF 4.1
Yamei Chen,Ying Liu,Sixuan Zhou,Zihan Cheng,Haixiang Wang,Zhiping Yang,Guitang Chen
A novel dual‐template magnetic molecularly imprinted polymers (DMMIPs) are successfully synthesized on the surface of Fe 3 O 4 @SiO 2 ‐C = C particles via the surface imprinting method using template molecules hydrocortisone (HC) and prednisolone (PSL), functional monomer methacrylamide, and cross‐linker ethylene glycol dimethacrylate as raw materials. Combined with high‐performance liquid chromatography technology, the simultaneous purification and analysis of HC and PSL in dairy products and feeds are achieved. The DMMIPs exhibit excellent selective recognition ability for both target substances. For HC, the LOD and LOQ of this method are 2.9 and 9.1 ng mL −1 , while for PSL, the corresponding values are 1.3 and 3.7 ng mL −1 . In the actual sample detection, the spiked recovery rates of HC range from 87.65% to 100.88%. For PSL, the recovery ranges from 89.56% to 100.49%. The experimental results indicate that these DMMIPs are highly effective in the separation and purification of HC and PSL in complex matrices.
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PubMed
高影响因子
POLYMER
·
2025
·
IF 4.5
Lei Tang,Fen Xiao,Xing Huang,Guiyin Zhou
Articular cartilage is a natural tissue characterized by a distinct layered structure, in which the synergistic interaction of its composite architecture provides exceptional low friction and excellent load-bearing capacity. In this study, inspired by the layered structure and hydration-based lubrication mechanism of articular cartilage, we developed a bilayer composite hydrogel using a UV-triggered surface catalytic-initiated radical polymerization (UV-SCIRP) approach. A hydrophilic polyelectrolyte boundary layer, providing effective lubrication, was polymerized onto the surface of the underlying tough hydrogel via a redox initiation system. The resulting bilayer hydrogel effectively integrates low surface friction with high load-bearing capacity in the underlying layer. This cartilage-inspired bilayer design presents a promising strategy for developing bioinspired materials that mimic the mechanical and tribological properties of native articular cartilage.
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Chuan Wei Zhang,Weifeng Zou,Hai Chao Yu,Xing Peng Hao,Guorui Li,Tiefeng Li,Wei Yang,Zi Liang Wu,Qiang Zheng
The design of soft robots capable of navigation underwater has received tremendous research interest due to the robots’ versatile applications in marine explorations. Inspired by marine animals such as jellyfish, scientists have developed various soft robotic fishes by using elastomers as the major material. However, elastomers have a hydrophobic network without embedded water, which is different from the gel-state body of the prototypes and results in high contrast to the surrounding environment and thus poor acoustic stealth. Here, we demonstrate a manta ray-inspired soft robot fish with tailored swimming motions by using tough and stiff hydrogels as the structural elements, as well as a dielectric elastomer as the actuating unit. The switching between actuated and relaxed states of this unit under wired power leads to the flapping of the pectoral fins and swimming of the gel fish. This robot fish has good stability and swims with a fast speed (∼10 cm/s) in freshwater and seawater over a wide temperature range (4–50 °C). The high water content (i.e., ∼70 wt %) of the robot fish affords good optical and acoustic stealth properties under water. The excellent mechanical properties of the gels also enable easy integration of other functional units/systems with the robot fish. As proof-of-concept examples, a temperature sensing system and a soft gripper are assembled, allowing the robot fish to monitor the local temperature, raise warning signals by lighting, and grab and transport an object on demand. Such a robot fish should find applications in environmental detection and execution tasks under water. This work should also be informative for the design of other soft actuators and robots with tough hydrogels as the building blocks.
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