Biosurface and Biotribology
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2024
·Vol. 10
·期 2
·63-75
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IF 1.6
Dongbiao Chang,Siyu Li,Zhenfan Bai,Jing You,Lili Cao,Qingcao Li,Huan Tan,Yan Zheng,Feilun Ye,Jie Weng
Biomaterials with exceptional performance are crucial for addressing the challenges of complex bone regeneration. Compared with traditional three-dimensional scaffolds, injectable microspheres enable new strategies for the treatment of irregular bone defects. Biodegradable poly (lactic-co-glycolic acid) has found widespread applications as microcarriers of drugs, proteins, and other active macromolecules. Applied to the surface of poly (lactic-co-glycolic acid) cage-like structures (PLGA-CAS), hydroxyapatite (HA) effectively reduces inflammation while enhancing biological effects. In this study, we loaded the surface of PLGA-CAS with micro- and nano-hydroxyapatite particles, referred to as μHA/PLGA-CAS and nHA/PLGA-CAS, respectively. Subsequently, their material characteristics and biological effects were assessed. The incorporation of hydroxyapatite onto PLGA-CAS resulted in enhanced surface roughness and hydrophilicity, coupled with improved thermal stability and delayed degradation. Furthermore, μHA/PLGA-CAS induced osteogenic differentiation of osteoblast precursor cells, while nHA/PLGA-CAS improved endothelial cell adhesion and stimulated angiogenic differentiation in vitro. Collectively, these findings suggest that μHA/PLGA-CAS and nHA/PLGA-CAS, each with distinct characteristics, hold significant potential for application as microcarriers in various biomedical contexts.
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CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Yuanyuan Xu,Zhiyuan Zhang,Zhou Cui,Lijin Luo,Peng Lin,Maojie Xie,Qiying Zhang,Baisheng Sa,Cuilian Wen
With rapid industrialization and economic growth, the serious environmental pollution caused by heavy metals and dyes is a pressing issue to be solved. The efficient construction of enriched active sites and porous structures is the key to obtain water purification material for pollution removal. In this study, an efficient electrostatic self-assembly strategy to achieve amino-functionalized bacterial cellulose/Ti 3 C 2 T x MXene (ABC/MX) composite with a 3D cross-linked porous structure has been proposed. Experimental characterization and theoretical calculations reveal that the successful incorporation of amino groups not only enhances the interfacial interactions between BC nanofibers and Ti 3 C 2 T x nanosheets, but also increases the active sites available for adsorption. The results highlight that the ABC/MX composite exhibits exceptional removal efficiency, with maximum adsorption capacities of 200.7 mg/g for Cr(VI) and 1103.7 mg/g for Congo red (CR). In particular, it reveals that the multifaceted adsorption processes of Cr(VI) and CR involve electrostatic interactions, reduction reactions, chelation, and hydrogen bonding effects. These findings highlight a versatile strategy for synthesizing BC-based adsorbents with remarkable adsorption properties and are suitable for practical wastewater treatment applications.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yuanchuan Ma,Jiao Wei,Yang Hu,Jialong Zhu,Wen-Jun Wang,Hong Fan
Superhydrophobic coatings have attracted widespread attention for their high versatility and scalability in various water-involved application scenarios. Developing superhydrophobic coatings with excellent durability is important, yet extremely challenging. Since the interfacial bonding offered by the essential low-surface-energy property is too limited to maintain surface textures. Herein, a well-tailored strategy is proposed to address the interfacial weakness by introducing efficient adhesive functional moieties into the low surface energy polymer structures employed for constructing superhydrophobic coatings. Catechol and urea groups were selected as key functional moieties and were homogeneously dispersed within the silicone network by being constructed as crosslinkers. In addition, the urea moiety effectively suppressed the oxidation failure of the catechol moiety because of the molecular encapsulation effect which functioned through the hydrogen-bonded intermolecular interactions. Owing to the synergistic enhancement of the two adhesion functional moieties, the optimized superhydrophobic coating showed over fivefold boost in mechanical stability, tolerating 40 m of sandpaper abrasion and 250 cycles of tape peeling. Superhydrophobicity was also well kept after various harsh environmental tests including chemical corrosion, UV aging, and extreme temperatures. This novel approach indicates a feasible way to enhance durability and will contribute to the practical application of superhydrophobic coatings.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Ziqi Feng,Yun Jia,Hongyou Cui
In this work, we reported that by using a strong thiol ligand as the morphology-directing reagent, a series of Au nanoparticles with plate-like surface sub-structures could be successfully obtained via a one-pot seedless synthesis. The size and the density of the plates on the surface of Au can be readily tuned with the amount of the thiol ligand, resembling different roughness of the surface. Arising from the different surface roughness , the localized surface plasmon resonance (LSPR) of these shape and morphological alike Au nanoparticles can be continuously tuned within the visible-NIR region. The broad LSPR absorptions and feasible tunability make the Au nanoparticles suitable candidate for plasmonic-related applications. Interestingly, huge SERS enhancement was simultaneously achieved based on the specific surface roughness. Our results demonstrate the great potentials for tuning the LSPR and SERS of Au nanostructures through the engineering of the surface morphologies, which would assist for the design, synthesis, and applications of Au-based plasmonic nanomaterials in various fields.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yumiao Lang,Mingru Wang,Shasha Zhou,Dandan Han,Peng Xie,Cuiping Li,Xiaoxi Yang
Polysaccharides are employed to modify proteins, forming complexes that enhance the functional properties of proteins, such as emulsification and stability. In this study, myofibrillar protein (MP)-chitosan (CS) complexes were formed between CS and MP under acidic conditions (pH 3.0–6.0). Results showed that CS can improve the solubility and emulsifying properties of MP, and the MP-CS complexes at pH 3.0 and 6.0 had better emulsifying properties. Concurrently, the particle size results indicated that better the emulsifying properties of the complex, the smaller the particle size. Consequently, the characteristics of the MP-CS complexes (at pH 3.0 and 6.0) were investigated. Our analysis using Fourier transform infrared spectroscopy revealed that the amide I band of MP was blue-shifted with the addition of CS, signifying a decrease in hydrogen bonding within MP. The endogenous fluorescence spectra showcased that the hydrophobicity surrounding the tryptophan residues in the protein changed, leading to enhanced polarity. Thermogravimetric analysis and differential scanning calorimetry further confirmed that the addition of CS improved the thermal stability of MP. These findings provide valuable insights into the interactions between MP and CS. Furthermore, the MP-CS complex can be leveraged to create a Pickering emulsion system for the efficient delivery of bioactive substances.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Hui Xi,Xueqing Xu,Qian Yang,Rui Su,Hui Wang,Deshun Li,Qiyun Mu,Dan Liu,Zhiwang Yang,Ziqiang Lei
Nanosheet materials have larger specific surface area and more active sites than bulk materials. In this paper, ultrathin graphite carbon nitride (UCN) nanosheets were first prepared by a multi-step calcination method, and then Bi 2 WO 6 nanoflowers were grown in-situ on the surface of UCN by a simple hydrothermal method to synthesize ultrathin graphite carbon nitride and bismuth tungstate composite (UCN/BWO). The synthesized catalyst was applied to the photocatalytic oxidative coupling of benzylamine (BA). After reacted 5 h under light in air atmosphere, BA was almost completely converted into N -benzylidenebenzylamine, which was 3.8 times higher than that of bulk graphite carbon nitride (BCN). The enhanced photocatalytic activity was not only attributed to the thin nanosheet structure of UCN which shortened the migration distance of photogenerated electrons, but also because the construction of Z -scheme heterojunction that inhibited the recombination of photogenerated carriers and improved the oxidation ability of the catalyst. Based on density functional theory (DFT) calculation and photoelectric performance test, the existence of Z -scheme heterojunction was proved. Combined with the active species capture experiments, the pathway of electron transfer in the reaction process and the possible reaction mechanism were proposed.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 32
·44759-44769
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IF 0
Wu Rui,Song Xi,Tian Guanghui
Highly active Fe 3 O 4 /GO/Au composite nanomaterial was fabricated as a substrate of surface-enhanced Raman spectroscopy (SERS) and applied for pesticide residue detection. The three-layer multifunctional Fe 3 O 4 /GO/Au nanoparticles (NPs) were designed by facile method, with high hotspots, and were characterized by various techniques, including ultraviolet spectrophotometry (UV), X-ray diffraction (XRD), infrared absorption spectrometer (IR), and transmission electron microscopy (TEM). The performance of Fe 3 O 4 /GO/Au was evaluated by Raman spectroscopy with R6G as a probe molecule to verify its enhancement effect. It exhibited a strong Raman signal with 10 −6 M of R6G. Furthermore, the presence of Fe 3 O 4 /GO/Au nanohybrid enabled the SERS-based method to detect mancozeb and showed an excellent linear relationship in the range of 0.25–25 ppm, with a low limit of detection (0.077 ppm), satisfactory EF, stability, and repeatability. In addition, the mechanism of SERS enhancement with electromagnetic mechanism (EM) and chemical mechanism (CM) was discussed in detail. Therefore, the proposed SERS approach holds promise as an auxiliary technique for screening contaminated agricultural products, environmental sample, and food in the future.
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MICROCHEMICAL JOURNAL
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2024
·
IF 4.9
Xinle Du,Yuhan Zhang,Rui Jing,Xiaoli Wu,Zhenbo Cao
3D layer metal hydroxides (LMHs) have attracted significant interest due to their distinctive structural features. Unfortunately, the limited electrical conductivity hinders the potential utilization of LMHs in electrochemical analysis. To address this issue, herein, gold nanoparticles (AuNPs) were introduced to layered yttrium hydroxides by a facile in-situ electrodeposition method. Subsequently, the hierarchical AuNPs/LYH nanocomposite was employed as solid supports for immobilization of horseradish peroxidase, generating an enzymatic biosensor for hydrogen peroxide detection. As a result, a linear range of 1–500 μM with a remarkably low detection limit of 0.33 μM (S/N=3) was achieved. Moreover, the biosensor also demonstrated excellent selectivity, reproducibility and stability. The superior electrochemical responses of the HRP/AuNPs/LYH nanocomposite towards H 2 O 2 can be ascribed to the synergistic effect arising from the flower-like structures of LYHs and the high conductivity of AuNPs. Our study provides a significant approach for the development of enzyme immobilized supports through the construction of layer metal hydroxide nanocomposites.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Zhihao Wang,Qiuli Cheng,Binzhong Lu,Panpan Zhang,Leitao Zhang,Wenlan Wu,Junbo Li,Ravin Narain
The wound therapy based on antibiotic delivery inevitably leads to the emergence of drug resistance. Hydrogel biomaterials with inherent antibacterial activities have emerged as promising candidates for addressing this issue. However, developing an inherently antibacterial hydrogel through simple and facile strategies to promote localized wound infection healing remains a challenge. In this study, we successfully constructed antimicrobial cationic hydrogels with self-healing and injectable properties through physically and chemically dual-crosslinked networks. The networks were formed by the copolymers poly[(di(ethylene glycol) methyl ether methacrylate)- co -(4-formylphenyl methacrylate)- co -(2-(methacryloyloxy)ethyl]trimethylammonium chloride solution)] (PDFM) and poly[(di(ethylene glycol) methyl ether methacrylate)- co -(2-aminoethyl methacrylate hydrochloride)- co -(2-(((6-(6-methyl-4[1H]pyrimidionylureido) hexyl)carbamoyl)oxy)ethyl methacrylate)] (PDAU). The hydrogel systems effectively facilitate the regeneration and healing of infected wounds through the contact bactericidal feature of quaternary ammonium cations. The presence of Schiff base bonds in the injectable hydrogels imparts remarkable pH responsiveness and self-healing properties. In vitro experiments verified their intrinsic antibacterial activities along with their favorable cytocompatibility and hemocompatibility in both in vitro and in vivo . In addition, the hydrogel significantly accelerated the healing of bacterially infected in a full-thickness skin wound. This facilely prepared dual-crosslinked hydrogel, without antibiotics loading, holds significant prospects for treating infected wounds.
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JOURNAL OF INCLUSION PHENOMENA AND MACROCYCLIC CHEMISTRY
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2024
·
IF 1.7
Hu Man-Na,Qu Xue-Jing,Chen Xiao-Lan,He Dan,Wang Guo-Ya,Liu Jia-Hui,Roy Tania,Kurniawan Alfin,Zhou Chun-Hui
Bone adhesives are known as a promising fracture treatment material because they can quickly heal broken bones. However, the existing bone adhesives have the disadvantages of weak binding ability to bone tissue, non-absorption, or difficulty in curing under wet conditions, which limits their wide application in the field of bone tissue engineering. In this study, the raw material of magnesium phosphate bone adhesive was modified, and the composite material of magnesium phosphate bone repair was prepared by the method of solid–liquid blending crosslinking. Mineral-organic composite, a new type of bone adhesive was prepared using calcined dolomite and montmorillonite as mineral components, phytic acid and gelatin as organic components. The compressive strength, porosity and bonding strength of the magnesium phosphate-based bone adhesive were analyzed by Fourier transform infrared spectroscopy, X-ray diffraction and scanning electron microscopy. When the dosage of dolomite is 8 wt% and the concentration of gelatin is 9 wt%, the adhesion strength of the bone adhesive is 2.04 MPa after 168 h placement. And the compressive strength of the bone adhesive was 6.66 MPa after 168 h placement. After the prepared bone adhesives were immersed in SBF solution for 14 and 21 days, EDS analysis showed that the accumulated material was bone-like hydroxyapatite, indicating that the prepared bone adhesives had good osteogenic activity. In addition, it was also found that the bone adhesive had fluid absorption ability and no cytotoxicity. So, conclusively it can be stated that such newly synthesized bone adhesive has significant medical potential.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhaohuang Zhong,Xindong Li,Lijinhong Huang,Siwei Yu,Jianghui Jia,Jiaju Huang,Meng Cai,Qinyan Zhu,Luo Bao,Wanfu Huang
Retrieval of rare earth ions from dilute wastewater produced from in-situ leach mining is a crucial approach to effectively mitigate the shortage of rare earth resources, and the employment of the membrane technology for recuperation of ionic rare earths is an energy-efficient and eco-friendly solution. In this study to optimize the use of the membrane technology for ionic rare earths recovery, TA@MOF-808 was fabricated by combining tannic acid (TA) with MOF-808 and then incorporated as nanoparticles into a polyetherimide (PEI) base membrane. On this basis, PA/PEI-TA@MOF-808 thin-film composite membranes were prepared via interfacial polymerization. TA@MOF-808 with its hydroxyl and carboxyl functional groups generated hydrogen and covalent bonds with the secondary amine groups of piperazine (PIP), which stored PIP and regulated its diffusion rate into the organic phase. Thereby, the membrane surface charge was modulated under acidic conditions, and a separation layer was reconstituted, improving the structural and operational stability of the membranes. The PA/PEI-TA@MOF-808 membrane exhibited a water flux of 42.1 L·m −2 ·h −1 , and La 3+ , Y 3+ , and Gd 3+ retention rates of 97.7 %, 96.7 % and 97.4 %, respectively. Separation tests, acid resistance tests, long-term operational stability tests and actual rare earth wastewater treatment tests revealed the PA/PEI-TA@MOF-808 membrane possessed outstanding ionic rare earth separation capability, consistent membrane flux, notable acid resistance, and operational stability, suggesting a bright future in the application for ionic rare earth recovery.
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JOURNAL OF THERMAL SPRAY TECHNOLOGY
·
2025
·
IF 3.3
Li Ting,Bai Yu,Zhang Chennan,Gao Yuanming,Ma Wen
Ion doping of hydroxyapatite (HA) has been increasing in popularity as a chemical approach to endow it with new properties. In this work, the solution precursor plasma spraying (SPPS) technique was used to prepare the magnesium (Mg)-doped HA coating on the titanium substrate. SPPS is a relatively new one-step deposition technique that allows ion doping and coating deposition to occur synchronously, saving time and costs. The XRD and FT-IR analysis confirm that Mg ions were incorporated into the HA structure and the main phase of the coatings belongs to the HA phase. The results demonstrate the feasibility of using the SPPS technique to prepare the doped HA coating. The addition of Mg ions causes lattice distortion of HA, which leads to a reduction in the chemical and thermal stability of the HA coating. The dissolution behavior of the coatings was investigated by immersing them in phosphate-buffered saline solution for different durations. The Mg-doped HA coating shows relatively higher solubility than the undoped HA coating. With the increase of Mg doping amount, more Ca 2+ and Mg 2+ are released from the coating samples. The adhesion strength of the coating is measured by scratch tests. The 5% Mg doped-HA coating shows the strongest bonding to the substrate. An improvement of 19.6 N is achieved compared to the undoped HA coating. The biocompatibility and bioactivity of the coating samples were evaluated based on the behavior of osteoblasts (MC3T3-E1) in vitro . Cell staining and MTT assay show better cell attachment and proliferation ability on the Mg-doped HA coatings. The presence of Mg in the coating also stimulates the expression of alkaline phosphatase (ALP) and the formation of mineralized nodules in MC3T3-E1 cells. Therefore, the Mg-doped HA coatings prepared by SPPS can be used as a promising implant coating material for orthopedic applications.
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