JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Jianjun Zhou,Xing Liu,Jianqing Zhao
The preparation of phase change materials (PCMs) with excellent heat storage capacity, shape stability, and working durability is of vital importance for their popularization and application. In this work, a series of form-stable PCMs was prepared via blending diglycidyl ether of bisphenol A (DGEBA), aliphatic anhydride with octadecyl side chains (MNAO), and paraffin together followed by thermal curing. Thanks to the plasticizing effect and self-assembly of paraffin, the crystalline behavior of paraffin and MNAO was hardly limited by the epoxy network, and the latent heat of EP/Pa-50 with 50 wt% paraffin content was high, up to 92.3 J/g. Meanwhile, EP/Pa-50 had a low supercooling extent of 11.0°C. Instead of the significant reduction in other properties of most PCMs after being blended with paraffin, the overall performance of EP/Pa-50 remained good due to the strong intermolecular interactions between paraffin and MNAO (based on their good compatibility) and the reliable epoxy network, and EP/Pa-50 exhibited excellent shape stability without the leakage problem, high thermal stability (remain stable below 170°C) and good mechanical properties (tensile strength up to 10.5 MPa). This work provides a facile strategy to prepare form-stable PCMs, which have promising application prospects in the field of thermal regulation.
✓ 已验证
产品关联
DOI
高影响因子
ENERGY
·
2025
·
IF 9.4
Xiaokai Zhang,Zhaoda Zhang,Jingru Zhang,Hongsheng Dong,Yi Zhang,Yu Liu,Mingrui Sun,Yongchen Song
The increasing power density and transient heat load of compact electronic systems pose critical challenges for thermal management, highlighting the need for effective thermal energy storage (TES) devices as thermal buffers. However, conventional packed-bed TES devices with spherical phase change material (PCM) capsules suffer from poor heat transfer and low space utilization. This study, for the first time, proposes a novel capsule design using triply periodic minimal surface (TPMS) shells to improve both thermal charging performance and PCM packing density. Two TPMS capsule configurations (Case 1 and Case 2), based on the sheet-type I-WP structure, were evaluated and compared with spherical capsules using computational fluid dynamics simulations. Results showed that TPMS-based designs exhibited superior thermal performance. The complete melting time of PCM was reduced by over 70 %, and peak thermal charging power increased by up to 97.2 % compared to spherical capsules. Flow field analysis attributed the improvements to increased heat transfer surface area, more uniform convection, and closer heat transfer distance. However, these advantages came at the cost of higher flow resistance, with pressure drops up to 4.8–5.6 times greater than those in the spherical capsule. Further parametric studies showed that, at low inlet velocity, Case 2 showed better early-stage charging but was later surpassed by Case 1. This crossover occurred earlier as inlet velocity increased. Pressure drop also showed a crossover: Case 2 was more resistive at low flow, while Case 1 incurred higher frictional loss at high flow. These findings offer guidance for compact, efficient TES design in high-power applications.
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·11270
·
IF 15.7
Yang Chaowei,Sun Fei,Zhang Yi,Qu Zhibin,Zuo Jiayu,Zhou Wei,Gao Jihui,Liu Shaoqin,Lu Yunfeng
Carbon-mediated active site engineering has demonstrated remarkable electrocatalytic activities for oxygen reduction reactions (ORR), yet the relationship between carbonaceous structure and ORR selectivity remains unclear. Herein, we show that local active sites and sp 2 domain size jointly regulate ORR selectivity. Specifically, we demonstrate that while local active sites determine the rate-limiting intermediate type (from O 2 − * to OOH*), increasing sp 2 domain size can either promote OOH* formation and subsequent O-O bond dissociation or facilitate OOH* consumption to enhance the reaction rate, all of which enable the ORR pathway to switch from 2e − to 4e − . This coupling is also validated using nitrogen-doped carbon soot to induce a profound change in ORR selectivity, where the synergistic interplay between small carbon domain sizes and nitrogen dopants boosts the 2e − selectivity from ~50% to over 90%. Ultimately, p -band theory integrates these coupling mechanisms, offering a fundamental principle for designing highly selective nanocarbon electrocatalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Tianyi Zhang,Lanxin Li,Shuhao Zhao,Fei Hu,Niancai Peng
Under-oil open sessile droplets (UOSD), a microfluidic system in which aqueous droplets are confined by an immiscible oil layer, integrate the inherent advantages of both open and closed systems. These include free accessibility, high flexibility, and allowance for gas exchange, while preventing evaporation and contamination, making them ideal for separated biological and chemical reaction units. However, the overlay oil barrier, though effective in protecting droplets from external interference, also poses challenges for micromixing within the droplets. Developing an efficient micromixing strategy for UOSD is therefore essential, to overcome the slow diffusion limit. In this study, we present a contactless and highly efficient micromixing strategy for this immiscible phase system. Mixing in our proposed approach is induced by generating Faraday waves at the oil-air interface, which periodically deform the lower droplets and drive internal convective flows. We document the substrate oscillations, the resulting nonlinear standing waves, and the associated droplet vibrations. The improvement in the rate of both solid-phase reaction (a 5.86-fold improvement compared to static) and liquid-phase mixing (completion within 15 s), attributed to the micromixing effect, is demonstrated. Additionally, we validated effectiveness of the under-oil droplet micromixer as a nucleic acid extraction unit, which is superior to the conventional tube-based method. The Faraday wave-assisted micromixing strategy, with its high controllability and robust performance, provides a promising tool for the operation of under-oil biological and chemical microreactors.
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Jun Bao,Yujia Tang,Hong Nie,Xiaofei Zeng,Qinghe Yang,Shuangqin Zeng,Xiaoyi Sang
Amorphous silica–alumina (ASA) is widely used in chemical industries due to its unique structure and Brønsted acidity. In this study, mesoporous ASA with obviously enhanced Brønsted acidity was synthesized by high-gravity technology. With the increase of Si/Al ratio, the fraction of tetra-coordinated aluminum (AlIV) in the ASA precursors and the concentration of Brønsted acid sites (CBAS) of ASA gradually increased. It was also found that the high-gravity technology could increase CBAS by over 76% compared to the conventional stirred tank reactor at the same Si/Al ratio. This enhanced Brønsted acidity is primarily due to the powerful mixing effect of the rotating packed bed reactor, which facilitates the formation of Si–O–Al bonds and AlIV through a more uniform distribution of silicon and aluminum. Finally, the relationship between the acidity of ASA and its catalytic activity for plastic degradation was investigated. ASA was found to significantly reduce the degradation temperature of polyethylene, polypropylene, and polycarbonate. The polyethylene degradation experiment also showed that increasing the CBAS can effectively improve the pyrolysis activity. This high-performance ASA prepared by a high-gravity technology is expected to be used in catalysts for petrochemical and environmental protection applications.
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Bio
·
2025
·
IF 10.2
Ming Zhang,Yamei Wang,Yao Dai,Yan Hu,Wanting Fu,Yuhao Zhao,Hanyu Ma,Di Zhang,Ying Chen,Yixuan Zhou,Lei Du,Jing Chang,Fang Liu,Shuyan Chen,Fei Wang,Dongdong Xiao,Zhen Li
Chronic wounds, especially diabetic foot ulcers, pose a major clinical challenge due to persistent inflammation, impaired angiogenesis, and cellular senescence. Senolytic therapies, which selectively eliminate senescent cells, have shown promise in promoting healing, but systemic toxicity limits their application. To address this, we developed an asymmetric fabric-based composite platform for localized senolytic delivery. Using single-cell RNA sequencing, we characterized senescence-associated alterations in human diabetic foot ulcer tissues and screened several senolytic candidates in skin fibroblasts and endothelial cells. Among these, navitoclax (ABT-263) emerged as the most effective senolytic. Incorporating ABT-263 into the fabric-based platform to prepare ABT-263-CGH, we confirmed its ability to reduce senescent cell burden while maintaining biocompatibility. In a diabetic mouse model, the ABT-263-CGH significantly enhanced wound healing, reduced senescence markers, and exhibited no detectable systemic toxicity. These findings highlight the potential of localized senolytic therapy using an asymmetric fabric-based wound dressing as a novel strategy for enhancing chronic wound healing, offering a promising therapeutic avenue for diabetic wound management, and paving the way for future clinical applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2025
·
IF 14.1
Dongrui Zhang,Jiangyue Liu,Hao Ye,Yu Shen,Haoran Su,Zhuqing Liang,Kexin Li,Xing Zhang,Shiyi Yang,Yunfei Lu,Zhexi Zhang,Sihang Liu,Yi Huang,Xiao Liu,Yubo Fan
The digital logic elements based on microfluidic devices are proposed for complex fluidic control. However, there is no logic microfluidic device for fabrication. Moreover, the precise fabrication of anisotropic hydrogel microparticles with programmable geometries has long remained a central challenge in soft matter physics, materials science, and biomedical engineering. Here, a programmable passive digital shutter mechanism based on multiphase liquid–liquid interface dynamics is introduced for the precise fabrication of hydrogel microfibers in a microfluidic platform. There are three fluids in the devices, where two immiscible phases are designed for creating a digital shutter and two aqueous phases for hydrogel formation. It is found that the liquid bridge of hydrogel solution at the liquid–liquid interface has a critical stable length, and the digital shutter is achieved by toggling between liquid bridge maintenance and breakup. By modulating the digital shutter, deterministic control over geometry in terms of length, aspect ratio, curvature, and torsion, and produce microfibers in diverse shapes, including linear, helical, tadpole-like, and spherical is achieved. To highlight its potential for tissue engineering, active materials, and soft microrobotics, the platform is utilized to generate cell-laden microfibers with high resolution and viability, and magnetically responsive microfibers.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yanan Wang,Pingping Hao,Sida Luo,Yan Gao,Mingguang Han,Mengchen Sun,Xiao Wu
Reversible surface materials with programmable wettability play an increasingly vital role in a wide variety of fields from science to industry. Based on laser-induced graphene (LIG) technology, we innovatively propose a paraffin-infused porous LIG paper (P-LIGP) with tunable superslippery wettability. On account of graphene’s excellent electrical property, paraffin in P-LIGP can transit rapidly from a solid-to-liquid state in response to the in situ Joule heating effect. Thus, a LIGP surface is created with a dynamic and reversible transition between slippery and nonslippery state. In addition, combining the patternable performance with tunable LIGP resistance, the paraffin layer from P-LIGP can be selectively melted based on Ohm’s law and Kirchhoff’s laws, thus enabling special flow pathways with programmable wettability for manipulating the droplets with various straight/oblique/arc/S-shaped sliding patterns. These applications with customizable LIG resistance performance promise the in situ Joule heating of P-LIGP for designing intelligent and flexible temperature-responsive surfaces.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 33
·2132
·
IF 2.8
Xiao Hongbo,Feng Chaochao,Chen Yangdie,Lin Zhenqin
Traditional ZnO-based microwave absorbers and monometallic ZIF systems suffer from narrow effective absorption bandwidths due to impedance mismatch and insufficient magnetic-dielectric synergy. To address these limitations, this study proposes a self-sacrificial template strategy for constructing Zn/Co bimetallic zeolitic imidazolate frameworks (ZIFs) using spherical ZnO as a dynamic coordination host. Unlike conventional hard-template routes, the self-sacrificial templating strategy allows atomic-level control over morphology and composition via in-situ dissolution–recrystallization, leading to hierarchical architectures with rich heterointerfaces. By tuning the Co 2+ content (0.1–0.3 g) and pyrolysis temperature (700–900 °C), the resulting carbon-based composites exhibit precisely regulated microstructures and balanced electromagnetic properties. The structural evolution and composition were systematically investigated using X-ray Diffraction (XRD), Transmission Electron Microscopy (TEM/HRTEM), X-ray Photoelectron Spectroscopy (XPS), and Vibrating Sample Magnetometry (VSM). The optimized derivative pyrolyzed at 800 ℃ (PSE3-2–800) exhibited exceptional microwave absorption performance, achieving a minimum reflection loss (RL min ) of − 51.24 dB at 4.2 mm thickness and an ultra-wide effective absorption bandwidth (EAB) of 7.36 GHz (10.64–18.00 GHz) at 2.3 mm. Structural and compositional analyses revealed that the hollow architecture formed via ZnO carbothermal reduction, coupled with graphitized carbon matrices embedded with Co 3 ZnC nanoparticles and atomic Co-Nx sites, synergistically enhanced dielectric polarization, magnetic resonance, and multi-path scattering. This work provides a paradigm for designing lightweight broadband absorbers through defect engineering and bimetallic coordination, overcoming the limitations of single-component systems in balancing impedance matching and multi-loss mechanisms.
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Tingji Song,Jiang Li,Zihan Qiu,Ning Lin
Antifouling coatings incorporated with the antifoulants offer a more economical choice than the self-polish and low-surface-energy antifouling coatings, because of their complexing resin modifications and relatively high costs. Traditional antifouling agents, such as organotin compounds and cuprous oxide, have been restricted or partially prohibited due to their environmental toxicity. In contrast, some plant extracts exhibit promising antifouling properties and have attracted attention as an environmentally friendly antifoulant in various liquid coatings. Nicotine, a natural and biodegradable plant alkaloid from tobacco, has been demonstrated to effectively inhibit marine biofouling and cell proliferation. However, the direct introduction of nicotine to the base coatings may cause rapid and burst release. This study develops a stable oil-in-water (o/w) sustained-release microemulsion encapsulating nicotine by an “egg-box” cross-linking method with sodium alginate and metal ions. In this microemulsion, nicotine exists both in the alginate “egg-box” structure by physical encapsulation and in the ionic binding state with alginate chains. The prepared microemulsion exhibits good stability and compatibility with epoxy coatings, as well as promising antibacterial, antialgal, and antifouling performances attributed to the sustained release of nicotine. This study finds a new approach to nicotine in the field of fine chemicals but not the traditional scope of cigarettes.
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 33
·2502480
·
IF 19
Naixin Zhai,Zihao Wang,Zhenzhi Cheng,Zhihao Xu,Keke Guo,Weiping Zhou,Fei Gao,Guangsheng Luo,Guangbin Ji
Multidimensional heterogeneous interface construction and multicomponent dielectric gene optimization have emerged as viable strategies for the design of high-performance microwave absorbing materials (MAMs) with broad effective absorption bandwidth (EAB). Herein, V 2 O 3 /VO/C@Ti 3 C 2 T X /TiO 2 composites with multidimensional heterostructures are prepared through the electrostatic self-assembly of modified MIL-88B(V) with MXene followed by carbonization. A synchronous manipulation of dielectric genes and the intensity of the built-in electric field (BIEF) is realized by tailoring the carbonation temperature of the precursor. The electron transport properties at the heterogeneous interfaces are precisely modulated by the design of several heterojunctions and BIEFs. Simultaneously, based on theoretical computational simulations and verifications, it is found that the spontaneous BIEF generated by in situ-constructed heterojunctions can activate the Mott–Schottky barrier, balancing the fermi energy levels on both sides of the interface and enhancing the interface polarization. Benefiting from dielectric gene modulation and the construction of BIEF system, the prepared composites exhibited an RL of –50.10 dB and an EAB value of 6.16 GHz with a fill ratio of 20%. This work offers rational insights for the design of multidimensional heterostructures and the optimization of electron transport properties at heterogeneous interfaces, ultimately aiding the development of stealth materials intended for electronic countermeasures.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Hui Li,Mengqian Wang,Hongli Guo,Ndzondelelo Bingwa,Guoning Li,Qiangqiang Xiao
Thermal management is critical for ensuring the safety and performance of lithium-ion batteries (LIBs). This study presents a novel composite phase change material (CPCM) synthesized using biomass-derived carbon from U ndaria pinnatifida and expanded graphite to enhance the thermal performance of paraffin wax (PW). The developed CPCM exhibits a thermal conductivity of 0.89 W/(m·K), 4.24 times higher than pure PW, while effectively preventing melting leakage. Numerical simulations demonstrate the CPCM can reduce the peak battery temperature from 77.7 °C to 59.7 °C at a 3C discharge rate and maintain temperature uniformity within 5 °C. Optimization of thermal conductivity enhancement and battery spacing reduction further improved heat dissipation and phase change utilization efficiency, highlighting the critical role of material properties and pack geometry in thermal management. This study establishes a sustainable and effective pathway for improving the safety of LIBs using biomass-derived materials, addressing key challenges in energy storage.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）