Polymers
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2026
·Vol. 18
·期 13
·1675
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IF 5.8
Bingxuan Wang,Tianfu Zhou,Jiayu Li,Yingjie Shi,Meiqi Yang,Yuxin Qian,Yanzi Gao,Meina Yu,Cheng Zou,Yuanwei Chen,Huai Yang
Polymer-stabilized liquid crystal (PSLC) films are promising for smart window applications because of their transparent-to-scattering switching behavior. However, conventional acrylate-based PSLC films often suffer from poor mechanical robustness and weak interfacial adhesion, limiting their use in flexible devices. Herein, epoxy-based PSLC films have been prepared through radical-promoted cationic photopolymerization using a difunctional epoxy monomer, E6M, and a series of liquid-crystalline monoepoxy monomers, E-nOCB. The effects of alkyl chain parity, chain length, and E6M/E-10OCB ratio on polymer morphology, electro-optical behavior, and peel strength were systematically investigated. Even-numbered E-nOCB monomers favored the formation of regular columnar polymer structures and improved optical contrast, whereas odd-numbered monomers produced more disordered networks with higher peel strength. Among them, the sample prepared with E-10OCB showed a better balance between electro-optical performance and mechanical adhesion. At a fixed total polymer content of 15 wt%, optimizing the E6M/E-10OCB ratio enabled the sample doped with E-10OCB to achieve the highest contrast ratio of 160.91 while increasing the peel strength from 47.28 to 55.69 kPa compared with the sample without E-10nOCB. These results demonstrate that regulating monoepoxy/diepoxy composition and alkyl chain structure is an effective strategy for improving the overall performance of epoxy-based PSLC films for smart windows.
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Journal of the American Chemical Society
·
2026
·Vol. 148
·期 28
·29854-29863
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IF 16.6
Li Ke,Yuan Guanghui,Cao Yingchang,Wang Jixuan,Jin Zihao,Zhao Xiaoyang,Hao Fang,Liu Keyu,Jia Zhenzhen,Xi Kelai,Liang Chao,Zare Richard N.
Efficient and environmentally benign recovery of precious metals from complex aqueous systems remains a central challenge. Here, we demonstrate that thermally generated water microdroplets at oil–water interfaces function as highly reactive interfacial microenvironments that enable selective gold reduction and macroscopic particle growth without external reductants, catalysts, or sorbents. Mild heating of oil–water mixtures containing Au ions produces abundant interfacial water microdroplets (5–50 μm) that continuously generate redox-active species, including solvated electrons, hydrogen atoms, and hydroxyl radicals, thereby driving reduction reactions that do not occur in bulk water. Selectivity is governed by a dual criterion: (i) thermodynamic accessibility above the solvent reduction limit imposed by hydrogen evolution and (ii) chemical stability of the reduced phase under strongly acidic conditions. Au satisfies both requirements, and extension experiments with Pt and Ag validate the broader applicability of this principle, whereas competing base metals are excluded either by redox constraints or by instability of their reduced forms. Dynamic microdroplet coalescence and rupture further couple redox chemistry with particle growth, promoting nanoparticle aggregation into micrometer- to millimeter-scale Au particles that are readily separated. The oil phase is recyclable over multiple cycles, enabling high-yield gold recovery with minimal inputs and waste generation. These findings, validated across capillary, glass-vial, and upgraded reactor systems, establish interfacial microdroplet chemistry as a scalable framework for selective precious-metal recovery.
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Nature Communications
·
2026
·
IF 18.1
Yu Wenhe,Li Menggang,Li Lu,Wu Xiaowen,Zhu Wenqian,Yin Zehong,Guo Hongyu,Liang Nan-Nan,Pang Quanquan,Li Biao,Gao Xin,Xia Jing,Hu Jin-Song,Luo Mingchuan,Guo Shaojun
Scaling proton exchange membrane fuel cells (PEMFCs) demands efficient and durable electrocatalysts for the cathodic oxygen reduction reaction (ORR). Concave surfaces and intermetallic phases have been proven to promote the activity and stability of Pt-based catalysts, yet integrating these two structural features in one catalyst remains challenging. Herein, we achieve this in a class of intermetallic, concave tetrahedral Pt 3 In (i-ct-Pt 3 In), through a sequential Pt(111)-selective wet-chemical etching and indium-enabled morphology-preservable annealing. The i-ct-Pt 3 In/C catalyst delivers a mass activity of 2.49 A mg Pt −1 in acidic media, preserving 97.8% of its activity after 30,000 cycles. In phosphate-containing electrolytes, it achieves a mass activity of 0.3 A mg Pt −1 , representing a 7.5-fold improvement over commercial Pt/C and translating to a peak power density of 1.0 W cm −2 in a high-temperature PEMFC at 160 °C. Theoretical calculations verify weakened adsorption of oxygenates and phosphate anions on concave Pt 3 In(111) relative to flat Pt(111), accounting for enhanced ORR kinetics and phosphate tolerance. This work highlights the potential of ordering morphological nanocrystals for energy electrocatalysis.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124157
·
IF 7.5
Junyi Shi,Hongjuan Wang,Peng Liu,Dehai Yu,Dandan Ji
PLA-based composite aerogels with high oil selectivity, good reusability, and gravity-driven transport capability are promising materials for oily-water treatment and spill remediation. However, many high-performance oil/water separation aerogels still rely on non-degradable matrices or fluorinated surface modifiers. Herein, ZIF-71 nanoparticles were incorporated into a polylactic acid (PLA) aerogel to construct a hydrophobic capillary-gating network through solution blending, water-assisted thermally induced phase separation, liquid-nitrogen freezing, and freeze-drying. The chlorinated imidazolate framework contributed hydrophobic/oleophilic domains, polyhedral roughness, and textural porosity, while the PLA matrix provided a lightweight biodegradable skeleton. Compared with pristine PLA, the optimized PZ71–3 aerogel increased the water contact angle from 114° to 136°, tensile strength from 0.088 to 0.166 MPa, elongation at break from 10% to 25%, and total pore volume from 0.0066 to 0.0091 cm³ g⁻¹ , while showing a BJH average pore diameter of 10.8 nm. The aerogel resisted a water head of 14.5 cm, selectively captured both floating heptane and sinking CCl₄, achieved oil recovery efficiencies of 98.2–99.2% with gravity-driven oil fluxes of 5300–17,200 L m⁻² h⁻¹ , and retained stable oil sorption capacity and flux over 20 cycles. Comparative benchmarking shows that PZ71–3 offers a balanced performance profile among MOF/polymer and biodegradable-polymer aerogels. This work demonstrates ZIF-71-induced hydrophobic capillary gating as an effective fluorine-free strategy for recyclable PLA-based sorbents for oil/water separation.
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MICROPOROUS AND MESOPOROUS MATERIALS
·
2026
·
IF 4.5
Yongtai Li,Yuanting Du,Yushan Jia,Ruixi Yang,Weijun Shan,Zhenning Lou,Haibiao Yu,Ying Xiong
Hollow coral-like MCM-41-C was successfully prepared by adjust ethanol dosage. • Hollow coral-like 7wt%Al-MCM-41-C with rich weak acid site was prepared by impregnation. • Butene yield was 92.26% for 7wt%Al-MCM-41-C catalyst (300 °C, 90 min). • Due to hollow coral-like structure, 7wt%Al-MCM-41-C exhibits high catalytic stability. In this paper, the hollow coral-like ordered mesoporous MCM-41-C zeolites were synthesized by hydrothermal method, and their synthesis conditions were thoroughly investigated. Then, x wt%Al-MCM-41-C catalysts feature with hollow coral-like morphology were prepared by impregnation method, and used for the catalytic conversion of γ-valerolactone (GVL) to butene. The results showed that the introduction of Al species not only did not destroy the original special microscopic morphological structure of the MCM-41-C, but also co-existed on the surface and skeleton of the catalyst, resulting in a large number of weak acid sites. The optimal 7wt%Al-MCM-41-C catalyst has a specific surface area of 708.56 m 2 g −1 . The content of weak acid was 0.7262 mmol g −1 . At 300 °C, the GVL conversion and butene yield over the catalyst can reach 99.10% and 92.26%, respectively, within just 90 min of reaction. Meanwhile, the 7 wt%Al-MCM-41-C catalysts also demonstrated excellent catalytic cycle stability, and the butene yield remained above 90% after the 4th cycle. Download: Download high-res image (330KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yang Peng,Mengdi Sun,Chengyu Duan,Guanghui Luo,Zheshun Ou,Huimin Liu,Jiating Chen,Yuxin Wang,Jimmy C. Yu,Zhuofeng Hu
A spinel oxide with low electronegativity Al substitution (ZnGaAlO₄) was designed. • The anode achieved 85.7% Faradaic efficiency and a 67.3 μmol cm −2 min −1 production rate for H 2 O 2 . • The introduction of Al enhances electron donation to HCO 3 − , significantly lowering the energy barrier. • The Al sites suppress OER intermediates (*O/*OOH), ensuring high 2e − WOR selectivity at high current densities. Electrochemical two-electron water oxidation reaction (2e − WOR) is a promising avenue for hydrogen peroxide (H 2 O 2 ) production. However, most reported anode materials suffer from insufficient selectivity and activity especially under high current density due to consequent competitive oxygen evolution reaction (OER). This seriously inhibits its industrial application. In this study, partially incorporating the octahedral sites (TM oct ) in spinel catalysts with low electronegativity elements like Al oct can effectively enhance the adsorption capacity of the 2e − WOR intermediate HCO 3 − , while the adsorption of OER intermediates (*O and *OOH) is inhibited. As a result, excellent H 2 O 2 selectivity of 85.7% and production rate of 67.3 μmol cm −2 min −1 are reached at a high current density of 250 mA cm −2 , which is much superior to that in most of the previous reports that hardly reached 120 mA cm −2 . This work reveals the regulatory mechanism of site electronic structure on reaction selectivity, providing a theoretical basis for developing highly efficient and stable 2e − WOR anodes under high current density conditions. Download: Download high-res image (221KB) Download: Download full-size image
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2026
·
IF 7.1
Jianfeng Hu,Hailin Liu,Gary Histand
Novel dual‑mode cooling synergy：Thermosensitive microcapsule‑triggered dissolution heat absorption coupled with passive evaporative cooling. • Fast, on‑demand response: PNVCL shell collapse at ~38 °C enables rapid heat uptake during thermal shock. • h‑BN network for rapid heat transport: Bypasses the thermal conduction bottleneck of polymer shells in traditional PCM microcapsules. • Multifunctional integration: Self‑healing, high stretchability, strong adhesion, and moisture absorption in one material. Efficient cooling materials are essential for the reliable operation of high-power devices. Herein, a multifunctional composite hydrogel (PBTPB) is fabricated by integrating PNVCL@NH 4 Cl thermosensitive microcapsules and an h-BN thermal conduction network into a polyvinyl alcohol/borax/tannic acid (PVA/borax/TA) matrix. The h-BN network enhances thermal conductivity by providing rapid heat transport pathways. Upon reaching a critical temperature, the microcapsules release NH 4 Cl, whose dissolution actively absorbs heat, while continuous water evaporation from the hydrogel contributes to passive cooling. Experimental results show that PBTPB exhibits excellent heat dissipation performance. In simulated chip cooling tests, a temperature plateau (61–67 °C) lasting 1170 s is achieved, significantly delaying chip overheating. In hot water cooling experiments, the PBTPB-covered test tube reaches a final temperature 14 °C lower than that under natural cooling. Moreover, PBTPB possesses outstanding mechanical properties (elongation at break: 1163%), rapid self-healing (91% efficiency within 10 min), and strong interfacial adhesion (3.2 kPa to copper), ensuring close contact with heat sources and long-term reliability. Thus, this composite hydrogel holds great promise for cooling applications. Download: Download high-res image (127KB) Download: Download full-size image
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ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Songbai Tian,Xin Tang,Saijun Zhang,Yuexin Yao,Ran Bi,Haixia Li,Xiaoming Sun,Zhuo Chen
Digital immunoassay allows for the detection of proteins at fg/mL levels by leveraging the principles of Poisson distribution. Nevertheless, the inherent Poisson noise restricts digital sensitivity to targets exceeding 100 molecules, rendering standard digital assays incapable of detecting targets below this threshold. To overcome this constraint, we introduce an integrated CRISPR/Cas12a-digital immunoassay technology. In this system, the CRISPR/Cas12a machinery first acts as a molecular amplifier, converting each target protein into multiple enzymatic reporters. These enzyme molecules are then individually quantified via a digitized readout system, enabling ultrasensitive protein detection. By harnessing the catalytic amplification of CRISPR/Cas12a, the method achieves detection of proteins at copy numbers below 100, effectively surpassing the conventional sensitivity barrier of digital immunoassays. We validated this approach through highly selective and accurate detection of CD44 protein. A linear response was observed across a concentration range of 0.05 to 5 fg/mL, conforming to the calibration model: P(X > 0) = 0.1191c + 0.0036. The limit of detection was determined to be 0.018 fg/mL, equivalent to approximately 36 molecules of CD44. The method was further applied to quantify CD44 in plasma samples from colorectal cancer patients, demonstrating its strong potential for clinical use in early cancer diagnosis and treatment monitoring.
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FOOD RESEARCH INTERNATIONAL
·
2026
·
IF 8.8
Mengqi Yu,Hong Chen,Yuyang Zhang,Shutong Zhang,Jiao Li,Jianan Sun,Sai Wang,Xiangzhao Mao
A Pt@Cu-HCF nanozyme with high oxidase-like activity was developed. • A paper-based sensor with the nanozyme was constructed for TAC detection. • Smartphone-based colorimetric analysis enabled rapid on-site TAC detection in marine oils. • The linear range of the sensor is 9.78–312.5 μM, with a LOD of 6.41 μM. • The sensor exhibits high sensitivity, selectivity, stability, and practical ability. Total antioxidant capacity (TAC) serves as a key indicator for evaluating the nutritional quality of foods. In this study, we designed a platinum-embedded copper hexacyanoferrate (denoted as Pt@Cu-HCF) nanozyme that exhibits high oxidase-like activity, efficiently catalyzing the oxidation of chromogenic substrates to generate robust colorimetric signals. Antioxidants quench hydroxyl radicals (∙OH) produced during the catalytic process, leading to a concentration-dependent suppression of the color signal. Leveraging this mechanism, a smartphone-integrated, colorimetric paper sensor for on-site TAC quantification was developed, using vitamin E as the calibration standard. The sensor was applied to determine TAC in fish oil, algal oil, and krill oil, demonstrating a linear response range of 9.78–312.5 μM and a limit of detection (LOD) of 6.41 μM. Validation using real-world marine oil samples showed excellent agreement with a commercial assay kit, confirming the reliability and practical applicability of this portable sensor for TAC measurement in complex biological matrices. Download: Download high-res image (189KB) Download: Download full-size image
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Food Packaging and Shelf Life
·
2026
·
IF 10.8
Xiaohan Chai,Si Meng,Zhicheng Wei,Qi Yuan,Lei Yang,Xingyu Chen,Junxiang Zhu,Hao Wu
The design of biodegradable films with high barrier performance has become increasingly important for sustainable food packaging. In this study, multilayer nanocomposite films were prepared by incorporating whey protein isolate (WPI) fibrillated worm-like aggregate (WLA) into a carboxymethyl chitosan (CMC) and sodium alginate (SA) matrix through layer-by-layer (LbL) assembly. Controlled fiber aggregation of WPI was achieved via combined thermal and EDC/NHS covalent coupling treatments, producing WLA with distinct conformational flexibilities. Structural characterization by FT-IR and SAXS confirmed that the incorporation of WLA strengthened interactions and reduced microdomain correlation length, thereby promoting a more compact and homogeneous interlayer structure. These structural improvements resulted in notable enhancements in mechanical strength, moisture resistance, water vapor and oxygen barrier properties. Moreover, the optimized 11-layer CMC/SA film with the most flexible WLA exhibited excellent preservation performance when applied to oxidation-sensitive food models. Compared with conventional petroleum-based materials, the bio-based multilayer nanocomposite films maintained product freshness and visual quality throughout storage. The findings highlight the crucial role of protein aggregate flexibility in modulating film microstructure and functionality, providing a promising route for constructing high-barrier, eco-friendly packaging materials suitable for practical applications in the food industry.
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CHINESE JOURNAL OF POLYMER SCIENCE
·
2026
·
IF 4.6
Zhu Heng-Hui,Wang Jin-Yu,Deng Nan-Kai,Huang Jia-Xiang,Hou Ya-Nan,Wang Meng,Liu Zhi-Yang,Huang Shuai
Liquid crystal elastomers (LCEs) are compelling smart materials for soft robotics and flexible electronics. However, both conventional and dynamically crosslinked LCE systems fundamentally rely on chemically crosslinked networks, which has long been regarded as a prerequisite for their reversible actuation. While thermoplastic elastomers based on block copolymers offer a structural model for constructing robust physically crosslinked networks, it remains a significant challenge to transplant this design strategy into LCEs to realize reversible actuation in non-co-valently crosslinked system. Herein, we develop a physically crosslinked thermoplastic LCE system based on ABA-type triblock copolymers (PS- b -MCLCP- b -PS). Polystyrene (PS) hard-block aggregates act as reversible physical crosslinking sites, effectively replacing permanent covalent bonds. We systematically investigated the regulatory effect of the PS block content on the microstructure, mechanical properties, and thermally responsive actuation of the materials. By achieving an optimal balance between physical network confinement and the segment mobility of the liquid crystal phase, the resultant elastomer exhibits excellent reversible thermally driven actuation, well-balanced mechanical properties and solvent recyclability with high mechanical retention. Furthermore, the material demonstrates prominent wide-temperature-range damping performance attributed to the synergistic energy dissipation of the physical network and mesogen rotation. This work offers a feasible molecular design strategy for sustainable and multifunctional LCEs to break the dependence on chemical crosslinking for reversible actuation.
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JOURNAL OF CONTROLLED RELEASE
·
2026
·
IF 12.4
Renfang-Zhu,Ying Xu,Mingyu Nie,Huiling Li,Ye Yuan,Zhixiang Cui,Hezhi Wang,Qiyao Zhai,Xianhong He,Ying Mao,Yidan Wei,Jian Guan,Xin Zhang,Shirui Mao
Clinically, no effective preventive strategies currently exist to inhibit the progression of early dry age-related macular degeneration (dAMD). Moreover, current retinal therapies rely on intravitreal injections, which carry inherent procedural risks. Inspired by natural melanin and viral structures, we developed virus-biomimetic melanin nanoparticles (VMNPs) surface-modified with ergothioneine (ET), featuring virus-like spike structures and a neutral zwitterionic shell. This study aimed to evaluate whether virus-inspired engineered nanoparticles could enhance retinal delivery and improve the therapeutic potential of melanin-based nanodrugs for dAMD. The VMNPs facilitated cellular uptake through both their virus-mimetic architecture and OCTN1-mediated active transport. They also exhibited potent antioxidant activity, significantly reducing intracellular and mitochondrial reactive oxygen species (ROS) in oxidative stress models of ARPE-19 cells. Transcriptomic analyses revealed that VMNPs activated intrinsic cytoprotective pathways by upregulating HMOX1 and SLC7A11 , while downregulating inflammation-associated genes. Importantly, VMNPs promoted transcytosis and, following topical administration, demonstrated improved retention and deep penetration within the rabbit eye, effectively reaching the retinal pigment epithelium (RPE) and deeper retinal layers. Notably, twice-daily topical administration of VMNPs markedly inhibited retinal degeneration in rabbits, achieving therapeutic efficacy comparable to a single intravitreal injection of pegcetacoplan. Collectively, these findings establish a promising paradigm for the non-invasive clinical treatment of dAMD.
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危险品化学品经营许可证（带存储）