Scientific Reports
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2014
·Vol. 4
·期 1
·1-9
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IF 5.078
Xu Wanxing,Li Xianfeng,Cao Jingyu,Zhang Hongzhang,Zhang Huamin
In this work we presented a general strategy for the fabrication of membranes with well-defined ions transport channels through solvent-responsive layer-by-layer assembly (SR-LBL). Multilayered poly (diallyldimethylammonium chloride) (PDDA) and poly (acrylic acid) (PAA) complexes were first introduced on the inner pore wall and the surface of sulfonated poly (ether ether ketone)/poly (ether sulfone) (PES/SPEEK) nanofiltration membranes to form ions transport channels with tuned radius. This type of membranes are highly efficient for the separators of batteries especially vanadium flow batteries (VFBs): the VFBs assembled with prepared membranes exhibit an outstanding performance in a wide current density range, which is much higher than that assembled with commercial Nafion 115 membranes. This idea could inspire the development of membranes for other flow battery systems, as well as create further progress in similar areas such as fuel cells, electro-dialysis, chlor-alkali cells, water electrolysis and so on.
研究领域:
材料科学
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电化学
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能源存储
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电池技术
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PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2020
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IF 9.038
Chaohui Liu,Junyuan Xia,Jincui Gu,Wenqin Wang,Qingquan Liu,Luke Yan,Tao Chen
A surge of effort has been devoted to establishing super-wetting membranes with versatility for oily waste water purification. However, persistent challenge remains the lower separation flux. Moreover, the majorities of catalysts are only adsorbed on the surface and easily fall off after multiple cyclic separations. In this work, an effective strategy has been taken to construct a composite membrane consisting of polyacrylic acid functionalized carbon nanotubes (CNTs-PAA) and MIL101(Fe)@platinum nanoparticles (MIL101(Fe)@Pt NPs). The obtained CNTs-PAA/MIL101(Fe)@Pt composite membrane can achieve degradation of dye molecules and at the same time effective separation of oil-in-water emulsions. The separation throughput of this composite membrane can reach up to 11000 L m −2 h -1 bar -1 , which has exceeded most of the previous reported multifunctional separation membranes. Furthermore, this composite membrane has presented stable mechanical property and excellent anti-corrosion ability. This work gives comprehensive consideration to excellent separation performance, versatility and stability, which could have potential applications in practical oily wastewater treatment.
研究领域:
材料科学
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环境工程
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化学工程
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DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2013
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IF 3.925
Jiacheng Yang,Xiangyu Wang,Minping Zhu,Huiling Liu,Jun Ma
For the first time, the removal process of metronidazole (MNZ) from aqueous solutions over nano zerovalent iron (NZVI) encapsulated within poly(acrylic acid) (PAA)/poly(vinylidene fluoride) (PVDF) membranes was reported. The resultant composite (PPN) demonstrated high reactivity, excellent stability and reusability over the reaction course. Such excellent performance might be attributed to the presence of the charged carboxyl groups in PVDF membrane support, which could enhance NZVI dispersion and improve its longevity. Results showed that a lower initial concentration and higher reaction temperature facilitated the removal of MNZ by PPN, and that the acidic and neutral conditions generally exhibited more favorable effect on MNZ removal than the alkaline ones. Kinetics of the MNZ removal by PPN was found to follow a two-parameter pseudo-first-order decay model well, and the activation energy of the MNZ degradation by PPN was determined to be 30.49 kJ/mol. The presence of chloride ions slightly enhanced the reactivity of PPN with MNZ, whereas sulfate ions inhibited its reactivity. In addition, MNZ degradation pathways by PPN were proposed based on the identified intermediates. This study suggests that PPN composite possessing excellent performance may be a promising functional material to pretreat antibiotic wastewaters.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
·
IF 10.53
Guohao He,Mingming Li,Xin Li,Qimeng Wang,Zhiying Xie,Yali Xue,Kai Wang,Jun Yu,Gengzhi Sun,Haizhou Yu,Xiaoyan Qiu
Isoporous membranes from a process coupling the self-assembly of block copolymer with nonsolvent-induced phase separation (SNIPS) could enhance both the permeability and selectivity due to the high pore density and uniform pore sizes. Whereas, it is difficult to precipitate PAA based block copolymer in nonsolvent to make membranes because PAA blocks are hydrophilic. Herein, isoporous PS 678 - b -PAA 180 membranes were well prepared after reinforced by multiwalled carbon nanotubes decorated with silver nanoparticles (MWCNT-Ag). Such composite membranes bear not only regular channels with an effective pore diameter of ca. 18.85 nm, but also high water permeance of 1770.35 L bar −1 m −2 h −1 . With the participation of carbon nanotubes, the PS- b -PAA isoporous membrane exhibits excellent photothermal conversion properties, which endows the membrane with an efficiency of ca. 10.6 kg m −2 h −1 for light energy-driven seawater desalination and wastewater purification. Moreover, the silver particle-decorated CNTs enable the membrane to be antibacterial, which ensures reliability in long-term application.
研究领域:
材料科学
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环境工程
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纳米技术
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2023
·
IF 8.4
Chang Xu,Shiqiang Guan,Xufeng Dong,Hao Huang,Min Qi
Inherent defects such as poor mechanical strength and low-temperature tolerance have seriously hindered further practical applications of hydrogels in electronic devices. Hence, a polyaniline sandwiched poly(vinyl alcohol)/poly(acrylic acid) (PVA–PAA-PANI) hybrid hydrogel with high strength and ideal low-temperature resistance was constructed by combining the Hofmeister effect and in situ polymerization. This PVA–PAA-PANI hydrogel can provide amazing comprehensive mechanical properties, including 3.5 MPa of breaking strength, 700% of elongation at break, and 11.5 MJ/m3 of toughness, and shows good fatigue resistance. Notably, the hybrid hydrogel-based supercapacitor has a satisfactory specific capacitance of 32.4 mF/cm2 and can withstand 5000 continuous charge/discharge cycles even under harsh cold environments of −20 °C. Moreover, the hybrid hydrogel also exhibits high conductivity and distinct linear sensing behavior, allowing it to accurately monitor various body motions. This work develops new strategies for the preparation of strong hydrogels for electronic devices and promotes their application in real-life applications.
研究领域:
材料科学
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电子器件
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生物医学工程
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高影响因子
LANGMUIR
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2011
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IF 4.269
Cuie Wang,Qin Yan,Hong-Bo Liu,Xiao-Hui Zhou,Shou-Jun Xiao
Infrared spectroscopy was applied to investigate the well-known EDC/NHS (N-ethyl-N′-(3-(dimethylamino)propyl)carbodiimide/N-hydroxysuccinimide) activation details of poly(acrylic acid) (PAA) and poly(methacrylic acid) (PMAA) brushes grafted on porous silicon. Succinimidyl ester (NHS-ester) is generally believed to be the dominant intermediate product, conveniently used to immobilize biomolecules containing free primary amino groups via amide linkage. To our surprise, the infrared spectral details revealed that the EDC/NHS activation of PMAA generated anhydride (estimated at around 76% yield and 70% composition), but not NHS-ester (around 5% yield and 11% composition) under the well-documented reaction conditions, as the predominant intermediate product. In contrast, EDC/NHS activation of PAA still follows the general rule, i.e., the expected NHS-ester is the dominant intermediate product (around 45% yield and 57% composition), anhydride the side product (40% yield and 28% composition), under the optimum reaction conditions. The following amidation on PAA-based NHS-esters with a model amine-containing compound, l-leucine methyl ester, generated approximately 70% amides and 30% carboxylates. In contrast, amidation of PAA- or PMAA-based anhydrides with l-leucine methyl ester only produced less than 30% amides but more than 70% carboxylates. The above reaction yields and percentage compositions were estimated by fitting the carbonyl stretching region with 5 possible species, NHS-ester, anhydride, N-acylurea, unreacted acid, unhydrolyzed tert-butyl ester, and using the Beer–Lambert law. The different surface chemistry mechanisms will bring significant effects on the performance of surface chemistry-derived devices such as biochips, biosensors, and biomaterials.
研究领域:
表面化学
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高分子化学
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生物偶联
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材料科学
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生物传感器
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DOI
高影响因子
EUROPEAN JOURNAL OF PHARMACEUTICS AND BIOPHARMACEUTICS
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2026
·
IF 5
Hao Wang,Shuang Wang,Guohua Wang,Dawei Chen,Ming Zhao,Haiyang Hu
Chronic refractory wounds present a significant global healthcare challenge, characterized by persistent inflammation and impaired tissue repair that conventional dressings often fail to adequately modulate. While Dragon ’s blood (Dra), a traditional Chinese medicine, offers potent anti-inflammatory and angiogenic properties highly suitable for this complex microenvironment, its clinical translation is severely hindered by inherent hydrophobicity and low bioavailability. To address these limitations and bridge the therapeutic gap, we developed a novel Dra-loaded polyethyleneimine/polyacrylic acid (PEI/PAA) xerogel powder. We first optimized the solubility of Dragon ’s blood extract (Dra-Ext) using solid dispersion and inclusion complex technologies. Comparative analysis indicated that solid dispersion with PVPK30 achieved superior solubility enhancement (12.12 μg/mL, a 46-fold increase) compared to the HP-β-CD inclusion complex. The optimized xerogel powder (Dra-SD/PEI/PAA powder) exhibited rapid gelation (<30 s), high fluid absorption (340.5% ± 10% within 30 s), excellent self-healing capabilities, and sustained drug release (85.8% ± 0.3% over 48 h at pH 7.4). Furthermore, the dressing demonstrated superior hemostatic activity (coagulation time = 0.85 ± 0.07 min) and favorable biocompatibility. In a rat model of chronic refractory wounds, the Dra-SD/PEI/PAA treatment significantly accelerated wound closure (99.50% healing rate at day 14), promoted collagen deposition, and downregulated pro-inflammatory cytokines (IL-1β by 61.25% and IL-6 by 84.85%). These findings indicate that the Dra-SD/PEI/PAA platform effectively integrates solubility enhancement with rapid hemostasis and inflammation modulation, offering a promising therapeutic strategy for chronic wound management. Download: Download high-res image (210KB) Download: Download full-size image
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jiahong Fan,Siwei Jiang,Yazecheng Liu,Xintao Wu,Peng Hu,Jun Yao,Yao Yao,Jiyue Hou,Yannan Zhang,Yingjie Zhang,Zhongren Zhou,Ning Du,Peng Dong
Silicon suboxide (SiOx) anode materials are sought to substitute graphite-based anodes due to their high theoretical capacity and lower volume expansibility. Present chemical vapor deposition industrial production inevitably produces about 15 wt % submicro SiOx wastes. To improve the reuse of submicro SiOx wastes in a more economical, efficient, and sustainable way, present research focuses on exploring spherical porous SiOx/poly(acrylic acid) (PAA) microparticles via a spray-drying process to enhance resilience and adhesivity. The PAA polymer membrane uniformly coats the SiOx matrix via strong hydrogen bond interactions, providing mechanical strength to whole particles. The availability of polymer also possesses excellent electrochemical stability and adhesion, remaining almost free from pulverization during cycling. In half-cell testing, the synthesized micro SiOx/PAA particles demonstrate a higher initial capacity efficiency of 68% compared to that of submicro SiOx and a high reversible capacity of 1102 mAh g–1 with a fading rate of 0.036% per cycle after 200 cycles at 2 A g–1. Even after 1000 ultralong cycles, the capacity still remains above 200 mAh g–1. The full-cell measurement shows a capacity of 160.25 mAh g–1 for 600 cycles, suggesting their practicality for industrial production. Microsized SiOx anodes have shown impressive performance, achieving high Coulombic efficiency (>99.8%), exceptional rate capability, and outstanding cycling stability over 600 cycles.
研究领域:
材料科学
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能源存储
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可持续发展
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DOI
PubMed
高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
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2025
·
IF 2.4
Weimin Yan,Chengmin Hou
The composite particles (St/Fe3O4) were prepared using the co-precipitation method, whereby FeSO4 and FeCl3 were precipitated under alkaline conditions. The particles were composed of a starch matrix and Fe3O4. Subsequently, AA was grafted and cross-linked onto the composite particles (St/Fe3O4) via a one-step traditional free radical polymerization method, resulting in the formation of polymer-modified composite particles (St/Fe3O4-g-pAA). The initiator used in this process was 2,2’-Azobis(2-methylpropionitrile). The structures of St/Fe3O4 and St/Fe3O4-g-pAA were characterized by FTIR, thermogravimetric analysis and hysteresis loop. The impact of varying parameters, including the dosage of the St/Fe3O4 and St/Fe3O4-g-pAA adsorbents, the initial pH value of the Cu(II) solution, the initial Cu(II) concentration, the absorption time, and the temperature, on the adsorption behavior of Cu(II) was investigated. The results demonstrated that St/Fe3O4-g-pAA exhibited excellent adsorption performance for Cu(II), with a unit adsorption capacity of 123.92 mg/g and a maximum removal rate of 85% when the original concentration of the Cu(II) solution was 10. The experiment was conducted with 24 mg/L of Cu(II) at a pH of 7 at room temperature, with a mass of 1.5 mg of St/Fe3O4-g-pAA and an adsorption time of 3 h. The adsorption process followed the Langmuir model and the pseudo-second-order kinetic model, which was dominated by chemical adsorption and belonged to single-layer adsorption. The results of the renewable performance studies demonstrated that following eight cycles of adsorption, 92% of the initial adsorption effect was retained. It can therefore be concluded that the St/Fe3O4-g-pAA adsorbent material prepared in this work is an effective means of improving the adsorption rate of Cu(II).
研究领域:
环境科学
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材料科学
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化学工程
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高分子科学
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水处理技术
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DOI
高影响因子
Materials Chemistry Frontiers
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2025
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IF 6.4
Shi Wang,Huan Yang,Yukai Chen,Boyuan Hu,Peng Tian,Xiongbiao Xue,Yong Wang,Yu Li,Xinli Jing
Conducting polymer (CP) hydrogels that possess electronic and ionic conducting behaviors have attracted increasing attention as flexible electronic materials. Due to the insoluble and infusible nature of CPs (e.g., polyaniline (PANI), polypyrrole (PPy), etc.), the performance of their hydrogels is typically restricted, especially when the hydrogel was constructed through the in situ polymerization of aniline or pyrrole monomers. In this study, a method to prepare robust and highly conducting hydrogels at a large scale was developed with highly conducting PPy nanotubes (PPy NTs) and an interpenetrating network (IPN) of polyacrylic acid (PAA) and polyvinyl alcohol (PVA). The PVA/PAA IPN contains covalent cross-linking points, ionic coordination, and hydrogen bonding sites. This structure endows the hydrogel with excellent strength and toughness and provides effective stabilization for PPy NTs. The obtained PPyNT/PAA/PVA hydrogels exhibit tensile strengths higher than 4.0 MPa, and the conductivity reached 5.3 S m−1 with a PPy NT content of 0.63 wt%. As the PPy NTs effectively bonded with the hydrogel matrix network, the PPyNT/PAA/PVA hydrogels exhibit a linear relationship of conductivity change vs. strain in a wide strain range of 0–500%, with a steady gauge factor (GF) of ca. 1.38. Benefiting from preparation feasibility, the variation trends of hydrogel conductivity, deformation ability, and sensing properties were systematically studied, providing a reference for high-performance strain sensor materials.
研究领域:
材料科学
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高分子科学
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纳米技术
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柔性电子学
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传感器技术
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DOI
高影响因子
Advanced Healthcare Materials
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2024
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IF 10
Yan Fang,Yanyan Zheng,Chongyi Chi,Sai Jiang,Wanbang Qin,Yicheng Zhang,Haiqing Liu,Qinhui Chen
Hydrogel is a very promising dressing for hemostasis and wound healing due to its good adhesion and long-term moist environment. However, secondary injury caused by tissue adhesion due to homogeneous hydrogel cannot be ignored. The obvious interface existing in Janus hydrogel will weaken its asymmetric function. Here, a hierarchical adhesive polyacrylic acid–polyurushiol water–oil Janus hydrogel (JPs@PAA-PU) without adhesive layer is fabricated by one-pot method in the stabilization of polystyrene@silica-siliver Janus particles (JPs). The morphological structure, mechanical properties, anisotropic chemical composition, and adhesion performance, in vivo, and in vitro hemostatic properties of Janus hydrogel are investigated. Result shows that the obtained Janus hydrogel possesses obvious compartmentalization in microstructure, functional groups, and chemical elements. Janus hydrogel is provided with asymmetric interfacial toughness with top 52.45 ± 2.29 Kpa and bottom 7.04 ± 0.88 Kpa on porcine liver. The adhesion properties of PAA side to tissue, red blood cells and platelets, promoting effect of PU side on coagulation cascade reaction and its physical battier endow Janus hydrogel with shorter hemostatic time and less blood loss than control group. It also exhibits excellent antibacterial effects against Escherichia coli and Staphylococcus aureus (>90%). Janus hydrogel possesses biosafety, providing safety guarantee for clinical applications in the future.
研究领域:
材料科学
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生物医学工程
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止血与伤口愈合
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生物材料
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION
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2021
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IF 2.583
Weirui Sun,Yinchun Hu,Yizhu Cheng,Sen Yang,Zhiqin Kang
Both physical and chemical cross-linking methods can improve the mechanical properties of hydrogel by increasing the cross-link density. In this study, a series of polyvinyl alcohol/polyacrylamide-co-polyacrylic acid (PVA/PAM-co-PAA)-based hydrogels were prepared by using Fe3+ as physical cross-linking agent and N,N’-methylenebisacrylamide (MBA) as chemical cross-linking agent. The stress relaxation experiments of PVA/PAM-co-PAA-based hydrogels and nonlinear fitting analysis were performed to study the effects of cross-linking methods on stress relaxation behavior of hydrogels. Furthermore, the four-element generalized Maxwell model succeeded in simulating stress relaxation behavior of hydrogels. When Fe3+ was used as the cross-linking agent of Fe3+/PVA/PAM-co-PAA hydrogel, it took a long time of 199.9 s when the structural units began to move. However, when MBA was used as the cross-linking agent of PVA/PAM-MBA-PAA hydrogel, the time was shortened significantly. Compared with PVA/PAM-co-PAA hydrogel, the initial and equilibrium stress of Fe3+/PVA/PAM-co-PAA and PVA/PAM-MBA-PAA hydrogel significantly increased. When Fe3+ and MBA were used as the cross-linking agent of Fe3+/PVA/PAM-MBA-PAA hydrogel together, the network structure became looser. The initial and equilibrium stress were 0.04 and 0.015 MPa, respectively.
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
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