查找使用阿拉丁产品的科研文献

Mutual diffusion coefficients of n-butanol + n-heptane and n-pentanol + n-heptane from 288.15 K to 318.15 K

Ying Zhang,Xinxin He,Yutian Chen,Maogang He

The mutual diffusion coefficients of n -butanol   +   n -heptane and n -pentanol   +   n -heptane were measured over the mass fraction of n -butanol or n -pentanol from 0.05 to 0.95 at intervals of 0.10 and the temperatures 288.15   K, 298.15   K, 308.15   K and 318.15   K at 0.101   MPa. The measurements were carried out using a digital holographic interferometry system. The expanded relative uncertainty of the mutual diffusion coefficients was estimated to be less than 2.4%. The influences of temperature and composition on the mutual diffusion coefficients were investigated. Moreover, equations for the mutual diffusion coefficients of the two binary mixtures were fitted to the data as functions of mass fraction and temperature. The correlations represent the data with the absolute average of relative deviations (AARDs) of 1.1% for n -butanol   +   n -heptane and 0.77% for n -pentanol   +   n -heptane, respectively.

A Size-Determined Growth Rule Enables Well-Preserved Silver–Gold Core–Shell Nanocubes for Reliable Surface-Enhanced Raman Scattering Bioanalysis

Yutian Lei,Yakun Shi,Ping Li,Jing Li,Wenqing Zhang,Si-Yang Liu,Yuzhi Xu,Zhaofan Luo,Xing Han,Yanfei Zhang,Jianhe Guo,Zong Dai

The reliable application of surface-enhanced Raman scattering (SERS) in bioanalysis is critically constrained by inherent trade-offs among sensitivity, chemical stability, and signal homogeneity of conventional substrate materials. Although silver–gold core–shell nanocubes (Ag@Au NCs) stand out for their high SERS activity and improved stability, preparing complete and uniform Ag@Au NCs remains challenging due to galvanic replacement-induced Ag core etching. To address this problem, this work reveals three distinct growth modes during Au shell deposition and proposes a size-determined growth rule to guide well-preserved Ag@Au NCs synthesis. We identified that larger Ag nanocubes (Ag NCs) with fewer unpassivated {111} facets preferentially form well-preserved Ag@Au NCs through layer epitaxial growth─an exclusive mode enabling intact ultrathin Au shells without Ag core etching. The resulting Ag@Au NCs exhibit exceptional batch-to-batch consistency and retain the high SERS activity of pristine Ag NCs, while achieving prolonged chemical stability (>180 days). Benefiting from their uniform morphology, these NCs can be assembled into highly ordered two-dimensional substrates with superior signal reproducibility (RSD = 4.96%) and plasmon activity (Raman enhancement factor >107). By integrating this substrate with a tetrahedral DNA-based detection method, a portable SERS biosensor cartridge was developed for multiplexed miRNA profiling in human plasma. Leveraging the superior performance, this platform demonstrates compelling potential for reliable cervical cancer diagnosis and staging. The modular cartridge design also makes it a versatile platform for diverse biomedical applications.

Evaluation of Four Inexpensive Extractants for Pyridine Separation from n-Heptane at 303.2 K: Liquid–Liquid Equilibrium and Thermodynamic Modeling

Jingli Sun,Xuqiang Li,Lu Chen,Yujie Zhen,Siyu Zheng,Shaolong Dong,Yingmin Yu

In order to reduce the impact of nitrogen-containing compounds in oil products on the environment, this paper selected n-heptane as the oil product model and pyridine as the nitrogen-containing compound. Four inexpensive extractants (furfuryl alcohol, 1,4-butanediol, N,N-dimethylacetamide, and dimethyl sulfoxide) were selected as the extractants to separate pyridine from the oil model at 303.2 K, and the liquid–liquid equilibrium (LLE) data were measured. The partition coefficients (D) and separation coefficients (S) of the extractants were calculated and used to evaluate the extractants. Based on the LLE data, correlations were performed using NRTL and UNIQUAC models, and the interaction parameters of the corresponding optimization models were obtained. The root-mean-square deviation (RMSD) values of the NRTL and UNIQUAC models were 0.98% and 1.09%, respectively. The GUI-MATLAB tool was selected to evaluate the accuracy of the binary interaction parameter regression by a Gibbs energy topology analysis. To probe the underlying mechanism of the extraction process between the extractants and pyridine, the σ-profile was used to analyze the interaction patterns between the extractants and pyridine. Given their high extraction efficiency, the studied extractants can be considered as potential extractants for extractive denitrification processes.

Phase-change pickering emulsions with solid-core confinement stabilized by tannic acid-functionalized zein nanoparticles for enhanced β-carotene bioaccessibility

Like Wang,Peiyan Feng,Bo Liu,Shuheng Wei,Peng Tang,Shouwei Yin

Novel phase-change Pickering emulsion microcapsules (PCPEs) were constructed using tannic acid (TA)-modified zein nanoparticles (T-zein) and a lauric acid/stearic acid eutectic (LS) to encapsulate β-carotene. The grafting of TA tuned the wettability of zein nanoparticles, enabling stable emulsification at 50 °C. Subsequent cooling resulted in microcapsules with a T-zein shell and crystalline core (LS), achieving an encapsulation efficiency of 88.15 %. The solidified oil phase restricted molecular migration, while interfacial T-zein provided dual protection, reducing β-carotene degradation under UV irradiation and auto-oxidation by 57.19 % and 67.88 %, respectively, compared with liquid-core emulsions. In vitro digestion studies showed that phase change triggered by physiological temperature enabled controlled release. PCPEs displayed superior gastric stability and resistance to coalescence in the intestine, enhancing the bioaccessibility of β-carotene to 42.57 % (36 % higher than liquid-core emulsions and 298 % of the free control). Overall, this solid-core engineering strategy presents a novel platform for the rational design of emulsion for targeted delivery of lipophilic bioactives.

Injectable, Antifouling Granular Zwitterionic Hydrogels for Preventing Postoperative Intrauterine Adhesion and Restoring Fertility

Mengyun Shi,Jiepei Lin,Qilin Wang,Hui Yu,Min You,Qiang Chen,Feng Lin,Sisi Zhang

The development of innovative therapeutic strategies to support endometrial repair and regeneration while preventing adhesion recurrence represents a critical research priority for improving clinical outcomes in women with intrauterine adhesions (IUA). Herein, a granular zwitterionic poly(sulfobetaine methacrylate) (PSBMA) hydrogel was engineered to exhibit injectability, biocompatibility and robust antifouling properties as quantified by reduced nonspecific protein adsorption. Therapeutic efficacy was demonstrated in a rat model, where the hydrogel distinctly reduced collagen deposition, attenuated fibrotic progression, and promoted morphological restoration of the endometrium. Furthermore, significant reductions in inflammatory responses in vivo were achieved through diminished macrophage infiltration and downregulation of pro-inflammatory cytokines, including IL-1β and TNF-α. The hydrogel was also shown to enhance endometrial proliferation, stimulate angiogenesis, and improve endometrial receptivity as indicated by upregulated expression of receptivity markers. Functional recovery was evidenced by successful embryo implantation post-treatment, underscoring the hydrogel’s potential to restore fertility. These findings collectively suggest that the granular PSBMA hydrogel represents a therapeutic platform for addressing endometrial injury, modulating inflammation, and facilitating fertility restoration, thereby offering potential for improved clinical outcomes in IUA management. Statement of Significance Current intrauterine adhesions (IUA) treatments, such as hormonal therapy and surgical adhesiolysis, suffer from high recurrence rates and limited efficacy. This work innovates with an injectable granular zwitterionic PSBMA hydrogel—adaptive to uterine contours, antifouling (reduced nonspecific adhesion), and biocompatible. It attenuates fibrosis (less collagen), suppresses inflammation (diminished macrophages/IL-1β/TNF-α), promotes endometrial proliferation/angiogenesis, and restores receptivity/fertility (successful implantation in rats). This multifunctional platform advances IUA treatment and enables clinical translation potential in reproductive medicine.

Corrigendum to “High-selective dehydration of bio-alcohols to oleffns over vanadium-doped hydroxyapatite catalyst with engineered defect sites” [J. Alloys Compd. 1036 (2025) 181853]

Dongying Yan,Chenxi Bai

Azacyclic-Modified Polyurethane Acrylate Films With Heat Resistance for Flexible Display Encapsulation

Xingtong Zhu,Bo Liu,Yun Wei,Xiuyan Ren

Polyurethane acrylate (PUA) films are widely utilized in flexible electronics and optical devices owing to their mechanical robustness, elasticity, and high transparency. However, their performance rapidly deteriorates under thermal stress, severely limiting their long-term reliability. Here, we report the synthesis of a novel azacyclic polymer, 3,3′,3″-((1,3,5-triazine-2,4,6-triyl)tris(azanediyl))triphenol (TTT), which is incorporated into PUA matrices to enhance heat resistance. The resulting azacyclic-modified PUA film exhibits markedly improved thermal stability, increasing the onset degradation temperature by approximately 20°C. Furthermore, the tensile strength of the modified film demonstrates a 61% enhancement compared with the unmodified counterpart after exposure to 60°C for 4 h. Notably, the modified PUA maintains over 90% optical transmittance without haze after being aged at temperatures ranging from 50°C to 120°C for 4 h, thereby preserving the visual clarity required for display applications. This study provides a novel strategy for fabricating heat-resistant PUA films, offering a promising pathway toward next-generation encapsulation materials for flexible and wearable electronic systems.

Anti-biofouling hydrophobic liquid surface for plasmid extraction on a digital microfluidics chip

Liu Zhen,Chen Rifei,Huang Kaicheng,Zhu Haiping,Liu Jiaze,Wu Chunhui,Wang Liqiu,Cheng Xing

Digital microfluidics (DMF) shows a great application prospect in droplet manipulation. However, the fouling of the hydrophobic surfaces caused by biomolecules limits its development. In this study, we report a new strategy to enhance the functionality and anti-biofouling performance of the DMF chip by using a hydrophobic liquid surface (HLS) rather than a regular hydrophobic solid surface (HSS). The DMF chip with such a configuration can efficiently drive various liquids with full-function operations. Moreover, our DMF chips can directly manipulate biomolecular droplets without restrictive conditions like adding surfactants or filling with silicon oil. The liquid-liquid contact between the droplet and the hydrophobic surface ensures that the non-specifically adsorbed biomolecules move along with the droplet. Thus, no residue is left behind to ruin the hydrophobicity of the hydrophobic surface. Meanwhile, the long-term reversibility of contact angle change and stability of droplet movement demonstrate the excellent ability against biofouling. In addition, high- and low-temperature tests also show the temperature stability of the HLS. Finally, a biochemical application, plasmid extraction of Escherichia coli ( E.coli ) cells, is successfully carried out on the DMF chip with HLS as a proof of its usability. This HLS is expected to offer versatile functionalities and anti-biofouling performance for DMF chips in handling biomolecular droplets.

Stabilizing an scu-topology Zr-MOF via linker installation for enhanced gas chromatographic separation

Chu Zeng,Hong-Tao Jiang,Ming Xu,Zhi-Yuan Gu

Flexible metal–organic frameworks (MOFs) with dynamic adaptability offered exciting opportunities for advanced separation, yet their tendency to undergo void collapse severely limited their application as gas chromatography (GC) stationary phases. Here, we overcame this challenge by stabilizing the scu -topology Zr-MOF NU-903 through a linker installation strategy. By incorporating biphenyl-4,4′-dicarboxylic acid (BPDC) into the vacant coordination pockets along the c-axis, the resulting material, NU-903-BPDC, exhibited markedly enhanced stability and structural rigidity, retaining its porosity even at 250 °C. Comprehensive characterization confirmed that the original structure was preserved, while framework flexibility was effectively suppressed. Fluorescence spectroscopy further revealed restricted ligand dynamics, corroborating the rigidified framework environment. When employed as a GC stationary phase, NU-903-BPDC delivered significantly improved resolution for C 7 hydrocarbons and dichlorobenzene isomers, benefitting from stronger thermodynamic interactions and reduced band broadening. Crucially, NU-903-BPDC maintained stable separation performance after thermal treatment, in sharp contrast to the pronounced degradation observed for pristine NU-903. This work demonstrated linker installation as an effective strategy to modulate framework flexibility, opening a general pathway toward robust, high-performance MOF-based stationary phases for chromatographic separations.

Lignin Nanoparticle Stabilized Pickering Emulsion Coating for Fabricating Water- and Oil-Proof, Biodegradable, and Recyclable Paper

Zhenke Wei,Jiayu Liu,Yonggui Wang,Zefang Xiao,Yanjun Xie

Paper derived from plant fibers is considered a highly promising alternative to non-degradable plastic packaging. However, its widespread use in packaging is limited by its poor water- and oil-proof properties. To address this challenge, this study developed a polyvinyl alcohol (PVA)/lignin nanoparticles (LNPs)/stearic acid (SA) (PLS) Pickering emulsion composite coating to fabricate high-performance biodegradable paper. In the emulsion system, the PVA acted as an oil-repellent in the aqueous phase, the SA served as a water-repellent in the oil phase, and the LNPs functioned as emulsifiers that effectively stabilized the emulsion. Owing to the synergistic effect among PVA, SA, and LNPs, the coated paper exhibited good water- and oil-proof properties (with a water contact angle of 111.2°, Cobb 60 value of 17.73 g/m 2 , and Kit rating exceeding 9/12), along with high mechanical strength (including a dry tensile strength of 7.12 kN/m and a wet tensile strength of 0.97 kN/m). While significantly enhancing performance, the PLS emulsion coating retained the environmental benefits of paper, could be easily removed to facilitate fiber recycling, and the coated paper was fully degradable in soil within 120 d. Overall, the PLS emulsion coating effectively enhanced the properties of paper without compromising its eco-friendly characteristics, demonstrating significant potential for promoting the substitution of plastic with paper.

Enhanced permselectivity and resistance of nanofiltration membrane through short hydrophobic chain-based surfactant-regulated interfacial polymerization

Kunyu Jin,Senhao Wang,Yingying Liu,Haifeng Zhang,Ming Wang,Zhi Wang

Membranes with high selectivity and water permeance are required for improving product water quality and increasing process efficiency. Traditional surfactant-assisted interfacial polymerization (IP) could improve selectivity of polyamide (PA) nanofiltration (NF) membranes but usually decreased water permeance. Here, short hydrophobic chain surfactant, sodium p-styrene sulfonate (SSS) with styrene and sulfonic acid groups was utilized as a new aqueous surfactant during IP process to prepare the PA-NF membrane, improving water permeability and salt rejection simultaneously. SSS had higher critical micelle concentration and can be richly incorporated within PA layer. The membranes characterizations were conducted by atomic force microscopy, scanning electron microscopy, attenuated total reflectance-Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, goniometer, and zeta potential analyzer. The regulated membrane exhibited slightly enlarged and more uniform pore size, as well as smoother, more hydrophilic and negatively charged membrane surface. The water flux increased from 46.6 ± 3.7 L∙m −2 ∙h −1 to 61.9 ± 2.6 L∙m −2 ∙h −1 (increasing by 32.83%), while Na 2 SO 4 rejection increased by 10.18%. The Cl − /SO 4 2− selectivity increased from 15.2 to 45.1 when using mixed salts solution as feed. Furthermore, SSS-regulated membrane demonstrated increased tetracycline rejection. Enhanced resistance properties (pH stability and antifouling properties) were also observed for SSS-regulated membrane. The study presents a novel surfactant for the fabrication of PA-NF membrane.

Metal ion coordination reconstruction: A facile strategy for fabricating permeance-enhanced acid-resistant polyurea nanofiltration membranes

Huan Qin,Fei Guo,Shiyu Xiao,Xiaobin Jiang,Xiaoming Yan,Gaohong He,Jianquan Luo,Xuehua Ruan

Coordination-induced reconstruction enables high-flux PU NF membranes. • Zr 4+ selectively disrupts hydrogen-bonding networks in PU layer. • Spatial reconstruction creates free volume while preserving selectivity. • 21% higher permeance with >95% rejection under acidic conditions. • Decouples permeability–stability trade-off via simple post-modification. Polyurea membranes exhibit exceptional acid-base tolerance due to their densely cross-linked structure and extensive hydrogen-bonding network, making them attractive for separations under extreme pH conditions. However, the tightly associated network also leads to limited free volume, resulting in low water permeability that hinders practical applications. Herein, we report a permeance-enhanced polyurea nanofiltration membrane fabricated via coordination-induced structural reconstruction. By introducing Zr 4+ into the polyurea network, coordination interactions with urea groups partially disrupt interchain hydrogen bonding, leading to network loosening and additional free volume. As a result, the water permeance is increased by 21% without compromising selectivity. Meanwhile, incorporation of Zr 4+ enhances membrane hydrophilicity and surface positive charge, which therefore improves antifouling properties and promotes the rejection of heavy metal ions. Importantly, the reconstructed membrane retains excellent acid resistance, maintaining a stable salt rejection above 95% over 720 h. This work provides a simple yet effective strategy to overcome the permeability-stability trade-off in polyurea membranes and offers new insights into coordination-mediated regulation of polymer network structures for high-performance separations under harsh conditions. Download: Download high-res image (175KB) Download: Download full-size image