SURFACE & COATINGS TECHNOLOGY
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2021
·
IF 4.158
Wentai Zhang,Sheng Zhao,Xiaoshan Mo,Peng Xian,Shuai Tang,Junyu Qian,Gang Shen,Chao Zhou,Nan Huang,Haijun Zhang,Guojiang Wan
In this study, Mg ions incorporated phytic acid (PA) and zoledronic acid (ZA) of metal-organic complex coating was built on Mg substrate. This coating aims to fulfill the corrosion controlling and differential regulation on osteoblast vs. osteoclast responses simultaneously. PA and ZA molecules were co-immobilized on the alkaline pretreated Mg by a facile one-step dip-coating method. Such immobilization process was executed by the chelation reaction between PA/ZA molecules and in-situ released Mg ions. This coating showed a homogeneous structure with metal-organic like framework. The electrochemical corrosion resistance and long-term degradation behavior of coated samples were remarkably improved. Consequently, the well-controlled Mg ion release, as well as the osteo-compatible PA molecule, promoted the proliferation of pre-osteoblast cells (MC3T3-E1). Moreover, this coating significantly suppressed both the proliferation and differentiation of osteoclast cells owing to the nature of ZA. This metal-organic complex coating offers a promising modifying strategy for Mg-based orthopedic implants for osteoporotic fracture healing.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Ban Chen,Xiaodong Xue,Ying Guo,Feng Peng,Jiao Li,Yue Zhu,Ye Zhou,Donghui Wang,Chunyong Liang,Zugui Wu
Magnesium is considered a promising orthopedic implant material due to its excellent biocompatibility and biodegradability. However, its rapid degradation and the associated corrosive byproducts can trigger inflammatory responses, limiting clinical application. To address this issue, a self-healing Mg-based composite coating was developed, consisting of an inner layer of dicalcium phosphate dihydrate (DCPD), a middle layer of polylactic acid (PLA) containing the corrosion inhibitor phytic acid (PA), and an outer PLA layer. The dissolution of the DCPD layer releases Ca²⁺ and PO₄³⁻ ions, which react with Mg²⁺ to form a stable calcium-phosphate (Ca-P) precipitate. Simultaneously, PA molecules released from halloysite nanotubes (HNT) in the middle layer chelate with Mg²⁺ to form magnesium phytate, enhancing corrosion resistance through a synergistic mechanism. Scratch tests demonstrated that the coating effectively inhibited corrosion propagation after 8 h of immersion in 0.9 wt% NaCl solution. During immersion, the current density initially increased from 1.460 × 10 - ⁸ A·cm −2 to 8.374 × 10 −7 A·cm −2 , followed by a slight decrease to 6.338 × 10 −7 A·cm −2 , indicating a self-healing response. In vitro experiments with MC3T3-E1 cells confirmed good biocompatibility of the coated Mg. Furthermore, in a rat femoral implantation model, the coated Mg exhibited improved in vivo corrosion resistance and enhanced new bone formation, with elevated expression of osteocalcin (OCN) and osteopontin (OPN) around the implant.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
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IF 9
Detao Li,Huamin Wang,Feiqiang He,Zhi Gao,Limin Zhou,Di Cai,Li Xu,Xi Wu,Zhen Yang,Jinbo Ouyang
The nuclear industry's production generates significant uranium-containing wastewater. Owing to radioactivity, this wastewater seriously threatens environmental safety and human health, becoming a major bottleneck for nuclear energy's sustainable development. Adsorption-based uranium extraction from radioactive wastewater represents a promising strategy, as it facilitates the recovery of a valuable resource while significantly mitigating environmental pollution. Chitosan contains active functional groups like amino groups and hydroxyl groups, this study employed chitosan cross-linking and composite technology, supplemented by freeze-drying methods. Based on the synergy of multi-functional groups, a composite foam adsorbent (HPC) was constructed, which consists of phytic acid-modified layered hydrotalcite rich in phosphate groups and chitosan/carboxymethyl cellulose. This adsorbent was employed for the removal of U(VI) from aqueous solutions, and its adsorption performance was systematically evaluated under various conditions. The results demonstrated that under optimal conditions, the maximum adsorption capacity for U(VI) reached 272.28 mg/g. The adsorption process was well described by the pseudo-second-order kinetic model and the Langmuir isotherm, indicating monolayer chemisorption. Thermodynamic studies revealed that the adsorption is spontaneous and exothermic in nature. The HPC adsorbent possesses a high specific surface area and is rich in diverse functional groups, including carboxyl, hydroxyl, amino, and phosphate groups. The synergistic effect among these functional groups enhances U(VI) adsorption through mechanisms such as chemical complexation, ion exchange, and isomorphic substitution. These findings suggest that HPC is a promising high-performance adsorbent for the treatment of uranium-containing radioactive wastewater.
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CONSTRUCTION AND BUILDING MATERIALS
·
2025
·
IF 8
Junyue Shan,Guoying Liu,Jieyu Wu,Chan Yang,Yunxia Zhou,Yanhua Zhang,Qiuqin Lin,Wenji Yu
Bamboo/polymer composites are eco-friendly, lightweight, and strong. However, their intrinsic flammability restricts their application. Traditional flame-retardant methods often fail to balance flame resistance and mechanical performance. This study introduces a novel approach for constructing layer-by-layer flame-retardant structures on bamboo fibres, inspired by cable protection designs. Partially delignified bamboo was processed to develop a porous structure, which was esterified to improve its copper ion-binding capacity. Coordination bonds served as crosslinking agents to incorporate ammonium phytate, forming a durable and continuous composite layer that adhered to parenchyma cells. The continuous layer-by-layer protective structures effectively inhibited heat transfer and flammable gas penetration while enhance the toughness of the parenchyma cells and reduced load during external impacts on the bamboo material. The treated bamboo/epoxy composite increased the limiting oxygen index (LOI)from 23.4 % to 31.1 %, and decreased the total heat release (THR)and total smoke production (TSP) by 49.2 % and 74.0 %, respectively. It also maintained an excellent flexural strength of 360.1 MPa along with outstanding superhydrophobicity (initial contant angle was 158.5°) and antibacterial properties (large-scale inhibition of Staphylococcus aureus ). These features render the bamboo/epoxy composites suitable for outdoor construction, marine vessels, and bridges, advancing high-value bamboo utilisation.
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高影响因子
Journal of Natural Fibers
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2022
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IF 3.507
Xinhua Liu,Hailong Liu,Yinchun Fang
In this study, intumescent flame retardant coating of polyethylenimine/phytic acid (PEI/PA) with gradient structure was constructed on cotton fabric through a facile layer-by-layer (LBL) assembly method. The LOI value of coated cotton fabric reached over 40%, indicating excellent flame retardancy. Reasonable controlling the LBL assembly process of PEI/PA coating brought less influence to the physical properties of cotton fabrics. And the coated cotton fabric revealed good flame retardant washing durability. Thermogravimetric analysis results of coated cotton fabrics showed that PEI/PA flame retardant coating changed the thermal decomposition process and promoted char formation revealing the obviously condensed phase flame retardant action. SEM images of char residues revealed that PEI/PA flame retardant coating promoted to form the intumescent flame retardant (IFR) char layer showing obvious IFR action. This research provides novel strategy for the development of high-efficiency flame retardant cotton fabric with good durability and physical properties using a simple LBL assembly method.
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ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Liang Shao,Ying Li,Zhonglei Ma,Yang Bai,Jie Wang,Peiyun Zeng,Pin Gong,Fuxiong Shi,Zhanyou Ji,Yang Qiao,Ran Xu,Juanjuan Xu,Guohong Zhang,Caiyun Wang,Jianzhong Ma
Conductive hydrogel-based wearable strain sensors with tough, stretchable, self-recoverable, and highly sensitive properties are highly demanded for applications in electronic skin and human–machine interface. However, currently, hydrogel-based strain sensors put forward higher requirements on their biocompatibility, mechanical strength, and sensitivity. Herein, we report a poly(vinyl alcohol)/phytic acid/amino-polyhedral oligomeric silsesquioxane (PVA/PA/NH2-POSS) conductive composite hydrogel prepared via a facile freeze–thaw cycle method. Within this hydrogel, PA acts as a cross-linking agent and ionizes hydrogen ions to endow the material with ionic conductivity, while NH2-POSS acts as a second cross-linking agent by increasing the cross-linking density of the three-dimensional network structure. The effect of the content of NH2-POSS is investigated, and the composite hydrogel with 2 wt % NH2-POSS displays a uniform and dense three-dimensional (3D) network microporous structure, high conductivity of 2.41 S/m, and tensile strength and elongation at break of 361 kPa and 363%, respectively. This hydrogel is biocompatible and has demonstrated the application as a strain sensor monitoring different human movements. The assembled sensor is stretchable, self-recoverable, and highly sensitive with fast response time (220 ms) and excellent sensitivity (GF = 3.44).
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Yawei Shi,Guozhu Liu,Liang Wang,Hongwei Zhang
Sucrose and phytic acid as abundant biomass resources have been combined for the fabrication of highly porous carbons with surface areas up to 1897 m 2 /g through hydrothermal carbonization and phytic acid-induced in-situ activation in the absence of additional activation agents. The carbons were employed as efficient adsorbents for the adsorptive removal of sulfamethoxazole (SMX) from water and the adsorption of dibenzothiophene (DBT) from model fuels. Kinetic and isotherm studies were performed for both processes. The effect of pH and ionic strength on SMX adsorption as well as the effect of arene on DBT adsorption was also investigated. By comparing the two adsorption processes , it was found that heteroatom doping could promote DBT adsorption obviously, but its effect on SMX adsorption was less straightforward. This was mainly attributed to the divergent solution media and thus the different adsorption mechanisms between aqueous and non-aqueous adsorption processes.
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PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2024
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IF 4.9
Xing Cheng,Yue Tang,Xiaohuan Huang,Linghui Huang,Han Tao,Yuangen Wu
Artificial enzymes have attracted much attention in food analysis because of their simple preparation, low cost, and strong stability. However, the most used artificial enzymes are based on oxidoreductases such as oxidase, peroxidase, catalase, and laccase. There are few reports on hydrolases like phosphatase for food analysis. Herein, a novel green zirconium-glutamic acid (Zr(IV)-Glu) complex was prepared using Zr ions and glutamic acid. The Zr(IV)-Glu complex was first found to possess excellent phosphatase-like activity, which was used to establish a fluorescent sensor for detecting phytic acid (PA). The Zr(IV)-Glu complex can catalyze the hydrolysis of 4-methylumbellione phosphate disodium salt (4-MUP) to produce blue fluorescent products with fluorescence emission peaks at 448 nm. PA with six phosphate groups can attach on the surface of Zr(IV)-Glu to form Zr-O-P bond and inhibit the catalytic activity of Zr(IV)-Glu, leading to the decrease of fluorescence in the system. The change of fluorescent intensity at 448 nm was positively correlated with the PA content, so that a fluorescent sensor using the phosphatase-like activity of Zr(IV)-Glu was proposed to detect PA. The established sensor has high sensitivity, low detection limit (LOD) of PA to 58 μg·L -1 , strong anti-interference ability, and excellent selectivity. This work can provide a new method for PA detection in food and further expand the application of phosphatase mimics.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Zimeng Kong,Yajun Chen,Tian Ye,Jinling Hao,Haoran Shi,Fenghao Hao,Ran Zheng,Lijun Qian
In this study, cellulose nanofibers (CNFs) were utilized as a synergistic agent, and combined with phytic acid arginine salt (PaArg) via blending and bonding. The effects of these different binding techniques of CNFs and PaArg on the flame retardant and mechanical properties of poly (butylene succinate) (PBS) were explored. The results indicated that both blended and bonded CNFs and PaArg enabled PBS composites to achieve a UL 94 V-0 rating, with the limiting oxygen index (LOI) value of the composite exceeding 28 %. When 20.5 % PaArg and 4.5 % CNFs were blended into PBS, the peak heat release rate (PHRR) of the composite decreased by 44.7 % compared to pure PBS. When the same content of hydrogen-bonded PaArg and CNFs(20.5PaArg-4.5CNFs) were added into PBS, the PHRR of the composite (PBS/20.5PaArg-4.5CNFs) reduced by 45.7 %. And it also exhibited a smaller fire growth index (FGI), enhancing the fire safety of the PBS composite. The incorporation of CNFs also improved the bending strength and impact strength of PBS. Specifically, the hydrogen bond between PaArg and CNFs demonstrated superior binding effects. Compared to the PBS/25PaArg composite, the bending strength and impact strength of the PBS/20.5PaArg-4.5CNFs composite were increased by 41.9 % and 82.1 %, respectively.
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POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Biyu Huang,Jirui Qu,Gaoyuan Li,Haopeng Zhang,Yiwei Geng,Lei Liu,Shaofeng Wang,Chuanmei Jiao,Xilei Chen
In this work, we developed a green strategy to extract chitosan (CS) from oyster shell (OS) waste via a ball-milling exfoliation method, then modified with phytic acid (PA) and combined with Prussian blue analog (PBA) nanoparticles to serve as a flame retardant for thermoplastic polyurethane (TPU) composites. The resulting TPU/PBA-CS@PA composites exhibited remarkable improvements in fire safety performance, demonstrating 58.5% and 43.4% reductions in peak heat release rate (pHRR) and total smoke production (TSP), respectively, compared to the control TPU. Notably, the composite containing 6 wt% PBA-CS@PA achieved a UL-94 V-0 rating while exhibiting no melt dripping behavior. The flame-retardant mechanism involved PBA-catalyzed formation of a graphitized, thermally stable char layer, while PA and CS synergistically improved char compactness. Hydrogen bonding between additives and the TPU matrix enhanced interfacial adhesion, increasing tensile strength by 31.5% (30.16 MPa). This work presents a green strategy for converting biowaste into high-performance flame retardants, advancing eco-friendly polymer composites with balanced fire safety and mechanical properties.
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ACS Applied Bio Materials
·
2024
·
IF 4.6
Tao Huang,Xiaodong He,Abid Ali,Sathishkumar Gnanasekar,Yunjie Xiang,Kai Zhang,Xi Rao,En-Tang Kang,Li Qun Xu
Medical implants are constantly facing the risk of bacterial infections, especially infections caused by multidrug resistant bacteria. To mitigate this problem, gold nanoparticles with alkyl bromide moieties (Au NPs-Br) on the surfaces were prepared. Xenon light irradiation triggered the plasmon effect of Au NPs-Br to induce free radical graft polymerization of 2-(dimethylamino)ethyl methacrylate (DMAEMA), leading to the formation of poly(DMAEMA) brush-grafted Au NPs (Au NPs-g-PDM). The Au NPs-g-PDM nanocomposites were conjugated with phytic acid (PA) via electrostatic interaction and van der Waals interaction. The as-formed aggregates were deposited on the titanium (Ti) substrates to form the PA/Au NPs-g-PDM (PAP) hybrid coatings through surface adherence of PA and the gravitational effect. Synergistic bactericidal effects of contact-killing caused by the cationic PDM brushes, and local heating generated by the Au NPs under near-infrared irradiation, conferred strong antibacterial effects on the PAP-deposited Ti (Ti-PAP) substrates. The synergistic bactericidal effects reduced the threshold temperature required for the photothermal sterilization, which in turn minimized the secondary damage to the implant site. The Ti-PAP substrates exhibited 97.34% and 99.97% antibacterial and antiadhesive efficacy, respectively, against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli), compared to the control under in vitro antimicrobial assays. Furthermore, the as-constructed Ti-PAP surface exhibited a 99.42% reduction in the inoculated S. aureus under in vivo assays. In addition, the PAP coatings exhibited good biocompatibility in the hemolysis and cytotoxicity assays as well as in the subcutaneous implantation of rats.
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PubMed
高影响因子
CELLULOSE
·
2020
·Vol. 27
·期 8
·4817-4829
·
IF 4.21
Zhu Wenju,Yang Mingyang,Huang Hao,Dai Zhao,Cheng Bowen,Hao Shuaishuai
Abstract A halogen-free, non-formaldehyde and eco-friendly bio-based synergistic flame retardant containing phosphorus–boron–nitrogen elements were synthesized and applied on cotton fabrics. Three curing cycles in cotton finishing process were employed. Samples treated with 30 g/L PBN solutions revealed the best result, while high concentrations did not gain more weight increase nor improved performance on the products. The SEM morphologies suggested penetration of ammonium phytate groups to the inner space and floatation of boron-containing groups on the surfaces of the cotton fibers. FTIR and XPS analyses indicated that after 50 laundering cycles, the boron can still stay on the surface of the treated cotton fibers. The LOI value of 30 g/L PBN finished cotton fabrics reached 45.0% and remained at 37.6% after 50 LCs. The char length of the treated cotton sample was 63 mm, whereas the control sample was 300 mm. The TG analysis in N 2 demonstrated that the decomposition temperature of the treated fabric slightly decreased, while the thermal oxidation stability was significantly improved. Cone calorimetry analysis showed that the peak heat release rate, total heat release, and effective heat combustion of the treated samples were substantially reduced compared with the control sample at 50 kW/m 2 . LOI, TG, vertical burning and cone calorimetry showed that the PBN treated samples had good flame retardancy and thermal stability. Graphic abstract
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危险品化学品经营许可证（带存储）