INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2019
·Vol. 20
·期 24
·6198
·
IF 4.183
Fang Wang,Chong Xie,Liying Qian,Beihai He,Junrong Li
Electro-actuated polymer (EAP) can change its shape or volume under the action of an external electric field and shows similar behavioral characteristics with those of biological muscles, and so it has good application prospects in aerospace, bionic robots, and other fields. The properties of cellulose-based electroactive materials are similar to ionic EAP materials, although they have higher Young’s modulus and lower energy consumption. However, cellulose-based electroactive materials have a more obvious deficiency—their actuation performance is often more significantly affected by ambient humidity due to the hygroscopicity caused by the strong hydrophilic structure of cellulose itself. Compared with cellulose, chitosan has good film-forming and water retention properties, and its compatibility with cellulose is very excellent. In this study, a chitosan/cellulose composite film doped with ionic liquid, 1-ethyl-3-methylimidazolium acetate ([EMIM]Ac), was prepared by co-dissolution and regeneration process using [EMIM]Ac as the solvent. After that, a conductive polymer, poly(3,4-ethylenedioxythiophene)/poly (styrene sulfonate) (PEDOT: PSS), was deposited on the surface of the resulted composite, and then a kind of cellulose-based electroactive composites were obtained. The results showed that the end bending deformation amplitude of the resulted material was increased by 2.3 times higher than that of the pure cellulose film under the same conditions, and the maximum deformation amplitude reached 7.3 mm. The tensile strength of the chitosan/cellulose composite film was 53.68% higher than that of the cellulose film, and the Young’s modulus was increased by 72.52%. Furthermore, in comparison with the pure cellulose film, the water retention of the composite film increased and the water absorption rate decreased obviously, which meant that the resistance of the material to changes in environmental humidity was greatly improved.Keywords:electroactive materials;electroactive properties;chitosan/cellulose composite film;[EMIM] Ac;mechanical properties
研究领域:
材料科学
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生物仿生学
·
航空航天工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Yang Yang,Jinning Wang,Mei Chen,Nan Li,Jiaguo Yan,Xin Wang
An electroactive dynamic membrane (EADM), which enabled simultaneous solid-liquid separation and contaminants removal, has been developed by electrostimulation using domestic wastewater as inoculum. Results showed that both the control dynamic membrane (CDM), without electrical stimulation, and the EADM systems exhibited stable removal performance with chemical oxygen demand (COD), and a robustness in responding to a fluctuating organic load. With the introduction of a weak electrical field, the EADM transmembrane pressure (TMP) was significantly reduced (0.02 kPa/d) compared with the control (0.20 kPa/d). In the treatment of methyl orange (MO), the EADM system achieved a decolorization efficiency of 85.87 %, much higher than the control dynamic membrane (CDM) system (58.84 %), which can be attributed to electrical stimulation and H 2 production on cathode. Microbial analysis has established that electrostimulation enriched the electroactive bacteria in the dynamic biofilm, and shaped the microbial structure, with improved contaminant removal. The results of this study highlight the potential of regulating the microbial community and creating a beneficial biofilm as a dynamic layer to facilitate contaminant removal.
研究领域:
环境工程
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水处理
·
微生物学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF BIOMATERIALS APPLICATIONS
·
2024
·
IF 2.3
Fuhua Sun,Lishi Yang,Yi Zuo
To fabricate electroactive fibrous membranes and provide simulated bioelectric micro-environment for bone regeneration mimicking nature periosteum, a series of electroactive polyurethanes (PUAT) were synthesized using amino-capped aniline trimers (AT) and lysine derivatives as chain extenders. These PUAT were fabricated into fibrous membranes as guided bone tissue regeneration membranes (GBRMs) via electrospinning. The ultraviolet-visible (UV-vis) absorption spectroscopy and cyclic voltammetry (CV) of PUAT copolymers showed that the electroactive PUAT fibrous membranes had good electroactivity. Besides, the introduction of AT significantly improved the hydrophobicity and thermal stability of PUAT fibrous membranes and decreased the degradation rate of PUAT fibers in vitro. With the increasing content of AT incorporated into copolymers, the tensile strength and Young’s modulus of PUAT fibrous membranes increased from 4 MPa (PUAT0) to 15 MPa (PUAT10) and from 2.1 MPa (PUAT0) to 18 MPa (PUAT10), respectively. The cell morphology and proliferation of rat mesenchymal stem cells (rMSCs) on PUAT fibers indicated that the incorporation of AT enhanced the cell attachment and proliferation. Moreover, the expression levels of OCN, CD31, and VEGF secreted by rMSCs on PUAT fibers increased with the increasing content of AT. In conclusion, an electroactive polyurethane fibrous membrane mimicking natural periosteum was prepared via electrospinning and showed good potential application in guiding bone tissue regeneration.
研究领域:
生物材料学
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组织工程
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再生医学
✓ 已验证
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Liang Jiang,Xuanjin Zhu,Jiaqi Li,Jiang Shao,Yu Zhang,Jintuo Zhu,Shihang Li,Lina Zheng,Xiao-Peng Li,Shenghui Zhang,Heguo Li,Gan-Ji Zhong,Huan Xu
Biodegradable poly (lactic acid) (PLA) nanofibrous membranes (NFMs) are appealing to address the increasing air pollution and outbreak of epidemic diseases, as well as the drastic accumulation of plastic and microplastic pollutions. Central to the development of high-performance PLA membrane filters are the promotion of electroactivity, polarization and electret properties, which has been a roadblock toward efficient capturing of airborne particulate matters (PMs) and bacterial pathogens. Herein, we proposed a microwave-assisted synthetic approach to enable direct growth of ZIF-8 nanocrystals at carbon nanotubes (CNT@ZIF-8 nanohybrids), which were spontaneously embedded into PLA nanofibers by a combined electrospinning–electrospray technology. With uniform and affinitive anchoring of CNT@ZIF-8 (8, 10 and 12 wt%), the PLA NFMs were characterized by largely increased surface potential (up to 1.78 kV), nearly doubled dielectric constant, and excellent triboelectric properties (output voltage of 12.7 V at 10 N, 0.5 Hz). The highly electroactive PLA/CNT@ZIF-8 NFMs exhibited excellent air filtration properties (98.7 % and 99.8 % removal of PM 0.3 and PM 2.5 , 206.9 Pa) even at the highest airflow capacity of 85 L/min, in clear contrast to the pure PLA counterpart (81.2 % and 84.1 %, 465.2 Pa). This was accompanied by 100 % perfect inhibition of both E. coli and S. aureus regardless of the CNT@ZIF-8 loadings, arising mainly from the elevated surface activity, facilitated generation of reactive oxygen species, and gradual release of zinc ions. Moreover, remarkable photothermal properties were demonstrated by temperature elevation of nearly 16 °C under near-infrared irradiation for only 20 s. The proposed methodology affords an exceptional combination of excellent air filtration, self-sterilization and photothermal properties, which may motivate development of ecofriendly and functional protective membranes for personal healthcare.
研究领域:
材料科学
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环境科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2022
·
IF 11.357
Jiahuan Li,Shaojie Ren,Xiao Qiu,Shan Zhao,Rui Wang,Yunkun Wang
To combat the spread of antibiotic resistance into the environment, we should adequately manage wastewater effluent treatment to achieve simultaneous removal of antibiotics, antibiotic resistant bacteria (ARB), and antibiotic resistance genes (ARGs). Herein, we fabricate a multifunctional electroactive poly(vinylidene fluoride) ultrafiltration membrane (C/PVDF) by phase inversion on conductive carbon cloth. The membrane possesses not only excellent retention toward ARB and ARGs but also exhibits high oxidation capacity as an electrode. Notably, sulfamethoxazole degradation involving hydroxylation and hydrolysis by the anode membrane is predominant, and the degradation efficiency is up to 81.5% at +4 V. Both electro-filtration processes exhibit significant ARB inactivation, anode filtration is superior to cathode filtration. Moreover, the degradation of intracellular ARGs (iARGs) located in the genome is more efficient than those located in the plasmid, and these degradation efficiencies at −2 V are higher than +2 V. The degradation efficiencies of extracellular ARGs (eARGs) are opposite and are lower than iARGs. Compared with regular filtration, the normalized flux of electroactive ultrafiltration membrane is improved by 18.0% at −2 V, 15.9% at +2 V, and 30.4% at +4 V during treating wastewater effluent, confirming its antifouling properties and feasibility for practical application.
研究领域:
环境科学
·
微生物学
·
水处理工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Liang Jiang,Long Zhang,Xinjian He,Mengke Tang,Cunmin Wang,Chao Xu,Xiang Li,Xuanjin Zhu,Ruizi Chen,Yifan Zhang,Jiang Shao,Mingming Zhang,Yabin Zhu,Huan Xu
The advent of multifunctional nanofibrous membranes (NFMs) has led to the development of next-generation air filters that are ready to intercept fine particulate matters (PMs) and monitor the respiratory diseases. However, it is still challenging to fabricate biodegradable NFMs featuring the desirable combination of high filtration efficiencies, low air resistance, and intelligent real-time monitoring. Herein, a hierarchical nanopatterning approach was proposed to functionalize the stereocomplexed poly(lactic acid) (PLA) (SC-PLA) nanofibers via the combined electrospinning of SC-PLA and electrospray of CNT@ZIF-8 nanohybrids. The nanopatterned SC-PLA (NSC-PLA) NFMs were characterized by largely increased surface activity and electroactivity, as evidenced by the nearly two-fold increase in surface potential (up to 7.3 kV) and substantial improvements in the dielectric properties. Furthermore, the NSC-PLA NFMs exhibited excellent tribo-output performance, yielding a voltage of as high as 13.5 V for NSC-PLA NFMs loaded 10 % nanohybrids (NSC-PLA10). In particular, the exceptionally high electroactivity and unique protrusion structure together contributed to promote the filtration efficiencies, while providing a low pressure drop (e.g., 96.1 % for PM 2.5 and 88.3 % for PM 0.3 , only 67.6 Pa of NSC-PLA10, at 32 L/min). More importantly, NSC-PLA NFMs enabled real-time monitoring of physiological signals during different respiratory states, as evidenced by the output voltages of 17.2, 32.9 and 37.5 mV for normal breath, fast breath and cough recorded by NSC-PLA10. The proposed NSC-PLA NFMs show enormous potential in the fields of air filtration and real-time respiratory monitoring, thus providing ecofriendly solutions to personal health management.
研究领域:
材料科学
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环境科学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Scientific Reports
·
2016
·Vol. 6
·期 1
·1-8
·
IF 5.228
Zhou Zhengnan,Li Weiping,He Tianrui,Qian Lei,Tan Guoxin,Ning Chengyun
To enhance the surface bioactivity of titanium (Ti) prostheses, an electroactive polyvinylidene fluoride (PVDF) film was prepared on a Ti substrate to provide a mimetic of the electrical microenvironment, which facilitated the performance of cell functions. The results of cell proliferation and differentiation assays indicated that polarization of the PVDF-Ti (PTi) altered its surface charge, thus inducing adhesion, proliferation and osteogenic differentiation of cells. The polarized PVDF-Ti (PPTi) may therefore find applications in bone regeneration.
研究领域:
生物材料
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组织工程
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2016
·
IF 3.586
Ruixia Yuan,Shiqi Wu,Baohui Wang,Zhanjian Liu,Liwen Mu,Tuo Ji,Long Chen,Bowen Liu,Huaiyuan Wang,Jiahua Zhu
Superamphiphobic and electroactive composite coating on aluminum substrate was successfully fabricated by integrating epoxy, polyaniline (PANI), fluorinated ethylene propylene , carbon nanotubes and SiO 2 nanoparticles into a two-layer coating configuration with nano/micro hierarchical surface structure. The composite coating demonstrates strong adhesion, excellent wear resistance and durable anti-wettability. The electrochemical tests demonstrated significantly enhanced anticorrosion performance by surface barrier effect of the superamphiphobic coating and redox catalytic capability of embedded electroactive PANI. The design principle of the multi-functional coatings will definitely benefit the advancement of durable anti-corrosive coatings and the achieved superior properties will promise a wider engineering applications in petroleum related industries.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2025
·
IF 5.7
Jing Wang,Leizhen Huang,Tao Guo,Zheng Liu,Huilun Xu,Hao Yang,Limin Liu,Ganjun Feng,Li Zhang
Discectomy is the most commonly used surgery in treating herniation-induced nerve compression, but it often destroys the structural integrity and leaves a defect in the intervertebral disc (IVD), leading to re-herniation risk. Considering that electric signals play a crucial role in tissue regeneration, a dual-electroactive scaffold was fabricated to promote the repair effect of the discectomy-left IVD defect. An electroconductive scaffold (G10) was 3D-printed firstly by doping graphene to form electro-osmotic networks in a polycaprolactone (PCL) matrix, then tetragonal barium titanate (T-BT) doped polyvinylidene fluoride (PVDF) fibrous membranes (B5) with piezoelectricity were electrospun on both the upper and lower surfaces of G10 to obtain a sandwich-structured scaffold (G10B5) with both piezoelectric and electroconductive activities. The in vitro experimental results confirmed that the dual-electroactive G10B5 scaffold could well mimic the electroconductive properties of natural IVDs and harvest ambient mechanical energy to produce electrical stimuli, thus recruiting surrounding stem cells. Following implantation in defective IVDs of rats, the dual-electroactive scaffolds could effectively decrease the loss of cells and extracellular matrix (ECM) and maintain the composite cartilage structure of IVDs. The dual-electroactive scaffold with a sandwich structure is proposed here to provide a novel strategy for treating the IVD defects after discectomy and broaden the application of electroactive biomaterials in tissue regeneration.
研究领域:
生物医学工程
·
组织工程
·
再生医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Yinghui Mo,Yihan Wang,Liang Wang,Jinxue Han,Lei Tian
The electroactive membrane (EM) technology can effectively degrade antibiotics. However, impacts of different coexisting contaminants in real wastewater on the degradation of antibiotics of EMs lacks deep understanding. Based on real membrane bioreactor (MBR) effluent, this study differentiated the impacts of organic and inorganic fractions on sulfamethoxazole (SMX) degradation of an EM. In the MBR effluent, the SMX removal rate was only ∼ 27 mg/(m 2 ·h), significantly lower than that in the synthetic feed (∼ 677 mg/(m 2 ·h)). Small effluent organic matters (EfOMs) were identified as the key contributors that suppressed SMX degradation. Two primary mechanisms were confirmed, one being their reactivity on the EM, and the other being their attachment onto the EM that covered the reactive sites. On the other hand, positive impacts were found for large EfOMs and inorganic ions besides their negative impacts. The deposition of large EfOMs and inorganic precipitates on the EM surface partly prevented small EfOMs from covering interior reactive sites of the EM, and these fouling layers also extended the SMX retention time within the EM by remarkably decreasing the membrane flux. These results highlight the importance of carefully selecting pretreatment processes for EMs to mitigate the impacts of coexisting contaminants on antibiotic degradation.
研究领域:
环境科学
·
水处理技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 35
·14481-14492
·
IF 0
Ren Liu,Xuebiao Zeng,Jingcheng Liu,Yuanyi Zheng,Jing Luo,Xiaoya Liu
Noncovalent surface modification has been proved to be one of the effective strategies for enhancing the properties of multi-walled carbon nanotubes (MWCNTs). When a non-covalent modification method is appropriately designed, novel opportunities for better performance of CNTs can be expected. In this paper, a novel kind of branched amphiphilic photo-sensitive and electro-active copolymer (BP(VCz/VM-alt-MA); BPVCM) was synthesized through a simple one-pot free radical copolymerization with 7-(4-vinylbenzyloxy)-4-methyl coumarin (VM), maleic anhydride (MA), 4-vinylbenzyl thiol (VBT) and 9-(4-vinylbenzyl)-9H-carbazole (VCz) as monomers. The copolymer BPVCM can self-assemble into homogeneous spherical micelles along the side-walls of MWCNTs and efficiently disperse MWCNTs in aqueous solution. In addition, the photosensitive coumarin groups of the copolymer chain undergo crosslinking under UV-irradiation, which leads to the encapsulation of MWCNTs in the crosslinked micelles and greatly improves the stability of the obtained MWCNT suspension. More interestingly, the electroactive carbazole moieties of the BPVCM–MWCNT composites could polymerize via an electrochemical polymerization method and form a MWCNT based conducting coating on the modified glassy carbon electrode (GCE), which eventually increases the number of electroactive sites and significantly accelerates the electron transfer. This novel preparation method permits us to obtain carbon nanotube hybrids exhibiting high water-dispersibility and stability while preserving their outstanding electrical properties, and would be valuable for construction of microelectronics and electrochemical sensors.
研究领域:
材料科学
·
纳米技术
·
化学工程
✓ 已验证
DOI
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Yinxiu Liang,Min Ji,Hongyan Zhai,Rumeng Wang
A novel closed-circuit permeable electroactive well (CPEW) was constructed to remove benzo[a]pyrene (BaP) from soil. BaP was removed sequentially through interception, adsorption and further biodegradation on a graphite felt, which acted as a filtration layer and also a bioanode. The removal efficiency of absolute BaP amount in CPEW was 52.52 ± 4.23%, higher than 44.94 ± 2.69% in the control (open-circuit PEW, OPEW). Physical adsorption and biodegradation accounted for 66.31 ± 4.15% and 33.51 ± 1.58% of BaP removed from soil in CPEW, and 86.26 ± 5.21% and 13.57 ± 1.29% in OPEW at 50 d. Bioelectrochemical process greatly enhanced the biodegradation efficiency of absolute BaP amount from 6.13 ± 0.49% (OPEW) to 17.63 ± 1.49% (CPEW). High abundances of Gammaproteobacteria and Clostridia on the anode of CPEW could significantly enhance electrons transfer and thus improve BaP biodegradation. Moreover, Vibrionaceae (belonged to class Gammaproteobacteria ) possibly played an important role in electron transfer. Based on the function predication analysis, the bioelectrochemical process could enhance the BaP biodegradation through increasing metabolic rates instead of changing metabolic pathways. Conclusively, CPEW, efficiently integrating filtration, adsorption and bioelectrochemical degradation, is a promising easy-to-implement in situ remediation technology for soil, sediment or groundwater contaminated with refractory organics.
研究领域:
环境科学
·
微生物学
·
污染治理
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）