JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Chen Yu,Sun Junchao,Li Yongxu,Wang Yubao,Shi Shaofeng,Jiang Jing,Wang Hongzhen,Cao Lan
Developing polyurethane foams (PUF) with superior water absorption and retention remains challenging due to insufficient understanding of structure-–property relationships. This study systematically regulates the water content gradient (as blowing agent) in all-water-foamed PUF to optimize physicochemical properties. Comprehensive characterization via SEM, contact angle, water absorption, retention, and resilience tests reveals that water content critically governs microcellular architecture, surface hydrophilicity, and their synergistic effects on water management. The optimized formulation (2.5 phr water) achieves exceptional performance: 421.73% water absorption, 76.31% retention, and 55.10% resilience. These enhancements originate from uniform cell structures that harmonize hydrophilic group distribution with mechanical integrity. This work establishes fundamental guidelines for designing eco-friendly PU foams with balanced resilience and hydroscopic functionality, validated through theoretical and experimental insights.
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高影响因子
Matter
·
2025
·
IF 17.5
Pingan Zhu,Liqiu Wang
Nanoemulsions are prevalent in diverse fields, such as cosmetics, food, pharmaceuticals, oil recovery, drug delivery, and templated materials synthesis, due to their high kinetic stability and versatility in structures and compositions. However, nanoemulsions remain thermodynamically unstable and gradually undergo irreversible breakdown, posing significant constraints on their applicability. Inspired by the dynamic equilibrium of atmospheric clouds, we present thermo-induced reversible nanoemulsification of biphasic liquid systems through cyclic heating and cooling processes. With our strategy, nanodroplets dissipate through dissolution upon heating and re-emerge through nucleation upon cooling, driven by temperature-dependent solubility. Combining experimental, numerical, and theoretical studies, we identify the critical conditions for nanoemulsification, elucidate the physicochemical mechanism of nucleation, and predict the size of nanodroplets. Thermo-induced nanoemulsification (TINE) offers a reversible, facile, and scalable method for energy-efficient, surfactant-free production of nanoemulsions, characterized by good emulsion stability, diverse emulsion types, and precise control over droplet size.
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MACROMOLECULAR RAPID COMMUNICATIONS
·
2025
·
IF 4.3
Yang Chen,Xinbo Lu,Ziqiang Liu,Weiqiang Xiao,Lina Song,Linquan Lang,Hongqing Li,Xiaoli Zhan,Feng Gao,Qinghua Zhang
Critical issues such as leakage, degradation, and thermal response hysteresis have become the focus in the application of phase change materials (PCMs) in area such as thermal management of fabrics. The encapsulation of PCMs prepared as microcapsules using polysiloxanes, etc. as a component unit of crosslinking agents represents a highly promising avenue of research. In this work, organosilicon crosslinkers are prepared and employed for the crosslinking of poly (methyl methacrylate) (PMMA) for microencapsulation of paraffin wax in microcapsule phase change materials (mPCMs). The results showed that increasing the degree of crosslinking helps to improve the performance of mPCMs by smoothing the shell surface, but excessive crosslinking leads to flocculation, which reduces its performance. The mPCMs produced with 10% wt crosslinking agent gave the highest performance with encapsulation efficiency, melting enthalpy and crystallization enthalpy of 81.3%, 285.0 J g −1 and 253.1 J g −1 , respectively. The obtained mPCMs are also combined with epoxy resin and fabrics to form composite materials. Notably, the polysiloxane-modified mPCMs permit epoxy resins to achieve a maximum temperature reduction of 25 °C. By adjusting the mass ratio of organosilicon crosslinkers, the obtained mPCMs enable textiles to reach a maximum temperature reduction of 17 °C while maintaining satisfactory air permeability.
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高影响因子
ANALYTICAL CHEMISTRY
·
2024
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IF 6.7
Yang Xie,Zhenhua Chen,Dongyang Cai,Dezhi Huang,Enqi Huang,Xiao Yang,Ting Zhang,Hongting Wen,Yu Wang,Meng Zhao,Dayu Liu,Banglao Xu
The digital nucleic acid detection assay features the capability of absolute quantitation without the need for calibration, thereby facilitating the rapid identification of pathogens. Although several integrated digital nucleic acid detection techniques have been developed, there are still constraints in terms of automation and analysis throughput. To tackle these challenges, this study presents a digital-to-droplet microfluidic device comprising a digital microfluidics (DMF) module at the bottom and a droplet microfluidics module at the top. Following sample introduction, the extraction of nucleic acid and the dispensation of nucleic acid elution for mixing with the multiple amplification reagents are carried out in the DMF module. Subsequently, the reaction droplets are transported to the sample inlet of the droplet microfluidic module via a liquid outlet, and then droplet generation in four parallel units within the droplet microfluidics module is actuated by negative pressure generated by a syringe vacuum. The digital-to-droplet microfluidic device was employed to execute an integrated multiplex digital droplet nucleic acid detection assay (imDDNA) incorporating loop-mediated isothermal amplification (LAMP). This assay was specifically designed to enable simultaneous detection of four uropathogens, namely, Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumoniae, and Enterococcus faecalis. The entire process of the imDDNA is completed within 75 min, with a detection range spanning 5 orders of magnitude (9.43 × 10–2.86 × 104 copies μL–1). The imDDNA was employed for the detection of batched clinical specimens, showing a consistency of 91.1% when compared with that of the conventional method. The imDDNA exhibits simplicity in operation and accuracy in quantification, thus offering potential advantages in achieving rapid pathogen detection.
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ACS Applied Polymer Materials
·
2024
·
IF 4.4
Peihang Li,Jiaqi Zhang,Hongfei Huang,Kangyuan Peng,Ziqiang Xu,Xueqin Chen,Bingbing Jiang
Membranes embedded with nanoparticles, especially with porous organic polymers (POPs) possessing high specific surface area and strong sorption of organic/inorganic pollutants, are gaining tremendous attention in saline or wastewater treatment considering the lower energy burden and the improving environmental sustainability. However, the commercial development of the materials has been obstructed by challenges of the scale-up fabrication of low-cost and high-performance membranes. Here, a POP membrane embedded with nanoporous polyurea colloids (PUCs) by using an electrospun technique is demonstrated. Large-scale production of PUCs is implemented through one-pot synthesis, which presents an ultrahigh yield of up to 20 wt %. The designed POP membrane exhibits an excellent adsorption capacity (19.8 g·g–1) of highly viscous silicone oil and displays superb potential for the removal of organic solvents, dimethyl sulfoxide (DMSO) (adsorption capacity as high as 24.6 g·g–1), from solvent streams. It shows a high rejection rate of up to 75% with an extremely high flux of 19.15 L·m–2·h–1 in the separation of the DMSO/water stream, and the rejection rate still maintains at 73% after the 5-cycle process. The fabrication strategy of the POP membrane establishes a scalable and generalized approach to obtain a low-cost nanofiltration membrane with excellent separation efficiency for a vast potential for fluid separations.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhi-Hui Xie,Yao Luo,Runjia Liu,Jilan Long,Liang Wu,Ke Wang,Chuan-Jian Zhong
Conventional micro-arc oxidation (MAO) coating on lightweight alloy displays innumerable micron-sized through-holes, severely restricting its corrosion protection in many industrial applications. To address this problem, we demonstrated a new strategy by creating a highly corrosion-resistant composite coating on magnesium alloy. The composite coating comprises a micrometer-scale MAO primer and a sub-micrometer-sized sulfur-selenium (S-Se) alloy top layer. The underlying MAO layer is incorporated with metal–organic framework (MOF) nanoparticles, including inhibitor-loaded zeolitic imidazolate framework-8 (ZIF-8) nano-containers. The thin S-Se film was fabricated by dip coating in a dimethylsiloxane-containing melt. The composite coating (S-Se/MOFs/MAO) with a thin thickness showed a tremendously increased charge transfer resistance and an ultralow corrosion current density down to 0.273 nA cm −2 , demonstrating remarkably superior corrosion protection in comparison with the unmodified and other MAO-based coatings reported to date. The origin of this unprecedented corrosion protection was mainly attributed to a combination of the inhibition by the released inhibitor and the structural integration resulting from the nanoparticle incorporation. Notably, the effective pore sealing via the strongly adhesive S-Se alloy thin film to the MgO layer through chemical bonding played an essential role in enhanced corrosion protection, supported by density functional theory calculation.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Abudureheman Bahatibieke,Jianming Zhao,Danping Fan,Zixiang Zhou,Junfei Li,Xing Wang,Hongyan Zhao,Tianyang Wang,Ziyuan Fang,Yajie Xie,Cheng Huang,Cheng Xiao,Yudong Zheng
Rheumatoid arthritis (RA) is a common autoimmune joint disease characterized by persistent synovial inflammation and cartilage damage. The current clinical treatments primarily utilize drugs such as triptolide (TP) to address inflammation, yet they are unable to directly repair damaged cartilage. Furthermore, the persistent inflammation often undermines the effectiveness of traditional cartilage repair strategies, preventing them from achieving optimal outcomes. To tackle this challenge, this study successfully developed a drug-loaded polyurethane hydrogel-oriented porous scaffold, designed to address persistent inflammation and facilitate cartilage repair under RA conditions. A drug-loaded hydrogel was formed via solvent-induced polyurethane-gelatin, resulting in the scaffold TP@GSPU. The sea-island micelle structure of TP@GSPU enables efficient loading of TP. The release of TP in the in vivo environment regulates the expression of inflammatory factors in macrophages, thereby improving the inflammatory microenvironment within the joint cavity. Additionally, the gelatin component of the scaffold provides robust support for cartilage regeneration. The efficacy of the TP@GSPU in regulating the inflammatory microenvironment and facilitating cartilage repair under RA conditions, which was demonstrated through cartilage damage repair experiments conducted in a rat collagen-induced arthritis (CIA) model. The design scheme of this material offers a potential approach to cartilage repair in the conditions of RA.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Xinyi Zhang,Huimin Qi,Weiming Lin,Xingshi Gu,Ruidi Liu,Ga Zhang,Yafeng Zhang,Jiaxin Yu,Gai Zhao
The risk of freezing on exposed surfaces has consistently posed a challenge to both safety and economy. Bionic orientation structure is significant in reducing locomotion resistance. In this work, a stress-localized material is prepared by coating the room temperature vulcanized silicone rubber (RTV) on the fish skin-like structure surface. The influence of the coating thickness and structural parameters of the fish skin on its ice-repellent and tribological properties is investigated at low temperatures. The results demonstrate that the small hook-like spine structure covered with a 1 mm thickness of RTV exhibits the lowest ice adhesion strength in the positive direction. This is because the stress localization phenomenon is easily triggered by the small hook-like spines. Furthermore, the lowest friction coefficient in the positive direction is achieved, which can serve to reduce friction and provide directional lubrication. The molecular dynamics results demonstrate that the strong interaction between the ice and RTV molecules at lower temperatures contributes to the high ice adhesion strength. The results of this work make the stress-localized material with oriented structures a promising candidate for specific de-icing and tribological applications.
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Materials Horizons
·
2025
·
IF 10.7
Wenchang Zhao,Shiyu Wang,Ying Zhou,Yanhong Li,Shuxian Tang,Yutong Zheng,Pingan Zhu
Light-driven micromotors with multiple motion modes offer significantly greater application potential than single-mode micromotors. However, achieving such versatility often requires complex structural designs and precise light focusing on specific micromotor regions, presenting challenges for dynamic operations and microscale precisions. This study introduces programmable assemblies of anisotropic micromotors driven by the photothermal Marangoni effect, produced in bulk via microfluidic technology. Under full-area near-infrared (NIR) irradiation, the micromotor exhibits multiple motion modes, including translation and revolution, while micromotor assemblies display additional rotational motion. Self-assembly of these micromotors is highly controllable and programmable, enabling easy customization of assembled structures to achieve desired motion modes. These features are expected to advance the development of various intelligent self-propelling systems, using multimodal individual micromotors as foundational building blocks.
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高影响因子
AICHE JOURNAL
·
2024
·Vol. 70
·期 8
·e18462
·
IF 3.5
Xin Huang,Mindan Chen,Yunyun Huang,Xiaoming Luo,Lin Teng,Longqiang Xiao,Jiaqing Li
Excessive electric field strength causes the droplets to contact but not coalesce, severely deteriorating the oil–water separation efficiency. The investigation of the non-coalescence of nonidentical droplets in oil under a DC electric field is conducted using high-speed photography. The effects of droplet volume ratio and interfacial tension ratio on the characteristics and critical parameters for droplet non-coalescence are systematically explored. The results show the critical electrocapillary number for the non-coalescence of nonidentical droplets and critical contact cone angle decreases as the volume sum increases or the interfacial tension ratio decreases, which is related to the competition between the resultant electric field force and the interfacial tension force. These results contribute to optimizing the operating parameters of the electric coalescer and improving the oil–water separation efficiency.
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Surfaces and Interfaces
·
2024
·
IF 5.7
Jiahua Gu,Xinxin Dai,Shiyi Liu,Xiantao Zhang,Yinsong Hu,Yinjiang Zhang,Zhuanyong Zou
s Traditional dressings tend to adhere to wounds during the healing process, causing secondary damage and delaying wound healing during replacement. Hydrophobic surfaces are resistant to the adhesion of cellular and proteinaceous wound exudates. Herein, a hydrophobic spunlace nonwoven-based dressing composed of the nano-silica/polydimethylsiloxane (SiO 2 /PDMS) composite cotton mesh was developed by a two-step spraying method. The process parameters were optimized by the L 9 (3 4 ) orthogonal experiment to obtain fabrics with excellent hydrophobicity and abrasion resistance. The optimized fabric finishing effect was achieved when the SiO 2 concentration was 0.8 wt%, the PDMS concentration was 0.8 wt%, the heat treatment temperature was 130 °C, and the time was 12 h. After optimization, the contact angle (CA) of the fabric was 145.0 ± 0.7°, and it only dropped by about 1° after the friction test. FTIR, XPS, SEM, and EDS analyses collectively demonstrated the presence of a cladding structure comprising SiO 2 and PDMS on the surface of the optimized fabric. This structural modification imparts desirable mechanical properties and anti-adhesion properties to the fabric. Tensile tests revealed little effect of the optimized finishing on the mechanical properties of the fabrics. Additionally, the anti-adhesion properties of the fabrics were evaluated by an in vitro gelatin model, showing a significant reduction in peeling energy for the optimized fabric. The peeling energies of the optimized fabric were 43.1 ± 28.8 J/m 2 and 84.1 ± 12.6 J/m 2 in the machine direction (MD) and cross direction (CD), respectively, indicating about 80 % superior anti-adhesion effect compared to commercially available oil gauze. Furthermore, the optimized fabric exhibited excellent biocompatibility, causing no hemolysis, pro-coagulant effect and favorable cytocompatibility. These results indicate that this hydrophobic spunlace nonwoven fabric has great potential for the application of anti-adhesive medical dressings.
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LANGMUIR
·
2024
·
IF 3.7
Zhishuang Han,Xinmeng Lv,Yingge Li,Meihuan Gao,Zhenlin Tang,Xinying Su,Ziyang Zhang,Haidi Li,Jing He,Zaihang Zheng,Yan Liu
For settling the recycling problem of waste polyurethane sponges (PU) and environment pollution of oil spills simultaneously, this work exploited the multifunctional superhydrophobic PU materials via the dip-coating method, which were prepared by anchoring modified Fe3O4 and expandable graphite (EG) on PU sponges under the adhesion effect of polydimethylsiloxane (PDMS). The water contact angle and sliding angle of as-prepared PU sponges reached 154.1 ± 1.6 and 8°, respectively. Most importantly, the superhydrophobic PU sponges were endowed with the multipath oil treatment ability, which consisted of magnetically driven, gravity-driven, peristaltic pump-driven, and photothermally driven modes. Besides, the light oil absorption capacity, separation flux, and efficiency for superhydrophobic PU sponges reached 23.9 g/g, 27779 L m–2 h–1, and 99.5%, respectively. Owing to the photothermal conversion ability of Fe3O4 and EG, the temperature of superhydrophobic PU sponges was raised to 71.5 °C within 233 s under 1.2 solar irradiation (1200 W/m2), demonstrating its absorption potential for high-viscosity crude oils. In addition, the prepared sponges exhibited good chemical/mechanical stability, self-cleaning, and flame retardancy. In a nutshell, this article has evolved an environmentally benign and practical method for fabricating the multifunctional materials in oil spill treatment, which will efficiently accomplish the targets of low carbon and environmental management.
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高影响因子
危险品化学品经营许可证（带存储）