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Ultrathin organic solvent nanofiltration membrane with Polydopamine-HKUST-1 interlayer for organic solvent separation

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Journal of Environmental Sciences 2024年第7期141卷 182-193页

作者： Haike Li Xindong Li Guozai Ouyang Lijinhong Huang Lang Li Wenhao Li Wanfu Huang Duokun Li Ganzhou Key Laboratory of Basin Pollution Simulation and Control Jiangxi University of Science and TechnologyGanzhou 341000China Innovation Center for Water Quality Security Technology at Ganjiang River Basin Jiangxi University of Science and TechnologyGanzhou 341000China School of Architecture and Design Jiangxi University of Science and TechnologyGanzhou 341000China WA School of Mines:Minerals Energy and Chemical EngineeringCurtin UniversityWA 6845Australia School of Materials Science and Engineering Tiangong UniversityTianjin 300387China

Polydopamine(PDA)and metal-organic skeleton HKUST-1 were co-deposited on the base membrane of hexamethylenediamine(HDA)-crosslinked polyetherimide(PEI)ultrafiltration membrane as the interlayer,and high-throughput organic solvent nanofiltration membrane(OSN)was prepared by interfacial polymerization and solvent activation reaction.The polyamide(PA)layer surface roughness from 28.4 nm in PA/PEI to 78.3 nm in PA/PDA-HKUST-10.6/PEI membrane,reduced the thickness of the separation layer from 79 to 14 nm,and significantly improved the hydrophilic,thermal and mechanical properties.The flux of the PA/PDA-HKUST-10.6/PEI membrane in a 0.1 g/L Congo Red(CR)ethanol solution at 0.6 MPa test pressure reached 21.8 L/(m^(2)·hr)and the rejection of CR was 92.8%.Solvent adsorption test,N,N-dimethylformamide(DMF)immersion experiment,and long-term operation test in ethanol showed that the membranes had high solvent tolerance.The solvent flux test demonstrated that,under the test pressure of 0.6 MPa,the flux of different solvents ranked as follows:methanol(56.9 L/(m^(2)·hr))>DMF(39.6 L/(m^(2)·hr))>ethanol(31.2 L/(m^(2)·hr))>IPA(4.5 L/(m^(2)·hr))>N-hexane(1.9 L/(m^(2)·hr)).The ability of the membranes to retain dyes in IPA/water dyes solution was also evaluated.The flux of the membrane was 30.4 L/(m^(2)·hr)and the rejection of CR was 91.6%when the IPA concentration reached 50%.This OSN membrane-making strategy is economical,environment-friendly and efficient,and has a great application prospect in organic solvent separation systems.

关键词： Interfacial polymerization Organic solvent nanofiltration Interlayer Metal-organic frameworks Polydopamine

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Polydopamine-Based Colorimetric Superwettable Biosensor for Highly Sensitive Detection of Hydrogen Peroxide and Glucose

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Journal of Analysis and Testing 2023年第2期7卷 118-127页

作者： Jinze Li Yuhao Li Zhongfeng Gao Key Laboratory of Interfacial Reaction and Sensing Analysis in Universities of Shandong School of Chemistry and Chemical EngineeringUniversity of JinanJinan 250022China College of Chemistry and Chemical Engineering Linyi UniversityLinyi 276005China

Superwettable surface has broad application prospects in fabricating biosensors due to its significant enrichment effect.Here,we report a Polydopamine-based colorimetric superwettable sensor that integrates superhydrophobic-superhydrophilic micropatterns for the determination of hydrogen peroxide(H_(2)O_(2))and glucose.Dopamine can be oxidized into Polydopamine with the addition of horseradish peroxidase(HRP)and H_(2)O_(2),leading to the deposited spots color change from colorless to black.The concentration of target can be determined by analyzing RGB value using a smartphone software.The superhydrophobic area on the superwettable surface helps capture droplets by confining them to superhydrophilic microwells.After droplet evaporation,the analytes are concentrated in the small superhydrophilic domain,thus greatly enhancing the sensitivity.The experimental results manifested that superwettable sensor is able to detect H_(2)O_(2)with a broad linear range of 0.25μmol/L-25 mmol/L and a low limit of detection(LOD)of 0.25μmol/L by naked eye.For glucose detection,the linear range of the sensor is from 2μmol/L to 20 mmol/L and LOD is 0.69μmol/L.The superwettable sensor has been successfully applied in practical samples,including cancerous cells,milk,urine,and human serum samples with acceptable results.This superwettable sensor has several merits,such as high sensitivity,rapid response,and low sample volume in a single microdroplet,and shows great potential in manufacturing portable devices for complex biosensing applications.

关键词： Colorimetric assay Polydopamine Hydrogen peroxide Glucose detection Superwettable sensor

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Polydopamine-coated photoautotrophic bacteria for improving extracellular electron transfer in living photovoltaics

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Nano Research 2024年第2期17卷 866-874页

作者： Melania Reggente Charlotte Roullier Mohammed Mouhib Patricia Brandl Hanxuan Wang Stefano Tacconi Francesco Mura Luciana Dini Rossella Labarile Massimo Trotta Fabian Fischer Ardemis A.Boghossian Institute of Chemical Sciences and Engineering(ISIC) Ecole Polytechnique Fédérale de Lausanne(EPFL)Lausanne 1015Switzerland Department of Biology and Biotechnology Charles Darwin Sapienza University of RomeRome 00185Italy Research Center on Nanotechnology Applied for Engineering of Sapienza(CNIS) University of Rome SapienzaRome 00185Italy CNR-IPCF Consiglio Nazionale delle Ricerche–Istituto per i Processi Chimico Fisici Bari 70126Italy Institute of Life Technologies HES-SO Valais-WallisSion 1950Switzerland Institute for Renewable Energy HES-SO Valais-WallisSion 1950Switzerland

Living photovoltaics are microbial electrochemical devices that use whole cell–electrode interactions to convert solar energy to electricity.The bottleneck in these technologies is the limited electron transfer between the microbe and the electrode surface.This study focuses on enhancing this transfer by engineering a Polydopamine(PDA)coating on the outer membrane of the photosynthetic microbe Synechocystis sp.PCC6803.This coating provides a conductive nanoparticle shell to increase electrode adhesion and improve microbial charge extraction.A combination of scanning electron microscopy(SEM),transmission electron microscopy(TEM),UV–Vis absorption,and Raman spectroscopy measurements were used to characterize the nanoparticle shell under various synthesis conditions.The cell viability and activity were further assessed through oxygen evolution,growth curve,and confocal fluorescence microscopy measurements.The results show sustained cell growth and detectable PDA surface coverage under slightly alkaline conditions(pH 7.5)and at low initial dopamine(DA)concentrations(1 mM).The exoelectrogenicity of the cells prepared under these conditions was also characterized through cyclic voltammetry(CV)and chronoamperometry(CA).The measurements show a three-fold enhancement in the photocurrent at an applied bias of 0.3 V(vs.Ag/AgCl[3 M KCl])compared to non-coated cells.This study thus lays the framework for engineering the next generation of living photovoltaics with improved performances using biosynthetic electrodes.

关键词： biophotovoltaics bioelectronics photosynthetic bacteria cyanobacteria Polydopamine adherence

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A self-healing and bioactive coating based on duplex plasma electrolytic oxidation/Polydopamine on AZ91 alloy for bone implants

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Journal of Magnesium and Alloys 2023年第2期11卷 592-606页

作者： Safoora Farshid Mahshid Kharaziha Masoud Atapour Department of Materials Engineering Isfahan University of TechnologyIsfahan84156-83111Iran

Magnesium(Mg) alloys are well-known in biomedical materials owing to their elastic module near to bone, biocompatibility and biodegradation properties. Nevertheless, poor corrosion resistance hinders their biomedical applications. Besides, it is necessary to endow Mg alloys with bioactive property, which is crucial for temporary bone implants. Here, a self-healing, corrosion resistant and bioactive duplex coating of plasma electrolytic oxidization(PEO)/Polydopamine(PDA) is applied on AZ91 substrate using PEO and subsequent electrodeposition process. Moreover, the role of different electrodeposition times(60 s, 120 s) and dopamine concentrations(1 and 1.5 mg/ml) to improve corrosion resistance, bioactivity, biocompatibility and self-healing property and its mechanism are investigated. The results indicate that the PEO coating is efficiently sealed by the PDA, depending on the electrodeposition parameters. Noticeably, electrodeposition for 120 s in dopamine concentration of 1 mg/ml(120T-1C) results in the formation of uniform and crack-free PDA coating. Duplex PEO/PDA coatings reveal high bioactivity compared to PEO coating, owing to electrostatic interaction between PDA top-layer and calcium and phosphate ions as well as high hydrophilicity of coatings. In addition, duplex PEO/PDA coatings also show improved and more stable protective performance than the PEO and bare alloy, depending on the PDA deposition parameters. Noticeably, the corrosion current density of the 120T-1C decreases one orders of magnitude compared to PEO. In addition, the presence of a broad passivation region in the anodic polarization branch shows durable self-healing property via Zipper-like mechanism, demonstrating the duplex coating could preserve promising corrosion resistance.Furthermore, the cytocompatibility of duplex coated samples is also confirmed via interaction with MG63 cells. In summary, the PEO/PDA coating with great corrosion protection, self-healing ability, bioactivity and biocompatibility could be a promising candidate for d

关键词： Magnesium alloy Plasma electrolytic oxidation Polydopamine Self-healing Bioactivity Orthopedic applications

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Polydopamine-modified chitin conduits with sustained release of bioactive peptides enhance peripheral nerve regeneration in rats

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Neural Regeneration Research 2022年第11期17卷 2544-2550页

作者： Ci Li Song-Yang Liu Li-Ping Zhou Tian-Tian Min Meng Zhang Wei Pi Yong-Qiang Wen Pei-Xun Zhang Department of Orthopedics and Trauma Peking University People’s HospitalBeijingChina Key Laboratory of Trauma and Neural Regeneration Ministry of EducationBeijingChina National Center for Trauma Medicine BeijingChina Beijing Key Laboratory for Bioengineering and Sensing Technology School of Chemistry and Biological EngineeringUniversity of Science and Technology BeijingBeijingChina

The introduction of neurotrophic factors into injured peripheral nerve sites is beneficial to peripheral nerve regeneration.However,neurotrophic facto rs are rapidly degraded in vivo and obstruct axonal regeneration when used at a supraphysiological dose,which limits their clinical benefits.Bioactive mimetic peptides have been developed to be used in place of neurotrophic factors because they have a similar mode of action to the original growth fa ctors and can activate the equivalent receptors but have simplified sequences and structures.In this study,we created Polydopamine-modified chitin conduits loaded with brain-derived neurotrophic factor mimetic peptides and vascular endothelial growth fa ctor mimetic peptides(Chi/PDA-Ps).We found that the Chi/PDA-Ps conduits were less cytotoxic in vitro than chitin conduits alone and provided sustained release of functional peptides.In this study,we evaluated the biocompatibility of the Chi/P DA-Ps conduits.Brain-derived neurotrophic factor mimetic peptide and vascular endothelial growth fa ctor mimetic peptide synergistically promoted prolife ration of Schwann cells and secretion of neurotrophic factors by Schwann cells and attachment and migration of endothelial cells in vitro.The Chi/P DA-Ps conduits were used to bridge a 2 mm gap between the nerve stumps in rat models of sciatic nerve injury.We found that the application of Chi/PDA-Ps conduits could improve the motor function of rats and reduce gastrocnemius atrophy.The electrophysiological results and the microstructure of regenerative nerves showed that the nerve conduction function and re myelination was further resto red.These findings suggest that the Chi/PDA-Ps conduits have great potential in peripheral nerve injury repair.

关键词： angiogenesis bioactive peptides nerve repair neurotrophic factor peripheral nerve injury peripheral nerve regeneration Polydopamine surface modification synergistic effects tissue engineering

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In vivo Polydopamine coating of Rhodobacter sphaeroides for enhanced electron transfer

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Nano Research 2024年第2期17卷 875-881页

作者： Rossella Labarile Danilo Vona Maria Varsalona Matteo Grattieri Melania Reggente Roberto Comparelli Gianluca M.Farinola Fabian Fischer Ardemis A.Boghossian Massimo Trotta Istituto per i Processi Chimico Fisici Consiglio Nazionale delle RicercheBari 70126Italy Dipartimento di Chimica Universitàdegli Studi di BariBari 70126Italy Institute of Chemical Sciences and Engineering(ISIC) Ecole Polytechnique Fédérale de Lausanne(EPFL)Lausanne 1015Switzerland Institute of Life Technologies HES-SO Valais-Wallis1950 SionSwitzerland Institute for Renewable Energy HES-SO Valais-Wallis1950 SionSwitzerland

Recent advances in coupling light-harvesting microorganisms with electronic components have led to a new generation of biohybrid devices based on microbial photocatalysts.These devices are limited by the poorly conductive interface between phototrophs and synthetic materials that inhibit charge transfer.This study focuses on overcoming this bottleneck through the metabolically-driven encapsulation of photosynthetic cells with a bio-inspired conductive polymer.Cells of the purple non sulfur bacterium Rhodobacter sphaeroides were coated with a Polydopamine(PDA)nanoparticle layer via the self-polymerization of dopamine under anaerobic conditions.The treated cells show preserved light absorption of the photosynthetic pigments in the presence of dopamine concentrations ranging between 0.05–3.5 mM.The thickness and nanoparticle formation of the membrane-associated PDA matrix were further shown to vary with the dopamine concentrations in this range.Compared to uncoated cells,the encapsulated cells show up to a 20-fold enhancement in transient photocurrent measurements under mediatorless conditions.The biologically synthesized PDA can thus act as a matrix for electronically coupling the light-harvesting metabolisms of cells with conductive surfaces.

关键词： bioelectronics photosynthetic bacteria purple bacteria electron transfer Polydopamine biophotovoltaics

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Chemo-photothermal immunotherapy for eradication of orthotopic tumors and inhibition of metastasis by intratumoral injection of Polydopamine versatile hydrogels

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Acta Pharmaceutica Sinica B 2022年第3期12卷 1447-1459页

作者： Bo Zhuang Ting Chen Yueqi Huang Zhimei Xiao Yiguang Jin Department of Pharmaceutical Sciences Beijing Institute of Radiation MedicineBeijing 100850China Department of Chemical Defense Institute of NBC DefenseBeijing 102205China

Cancer remains one of the leading causes of death globally and metastasis always leads to treatment failure.Here,we develop a versatile hydrogel loading photothermal agents,chemotherapeutics,and immune-adjuvants to eradicate orthotopic tumors and inhibit metastasis by combinational therapy.Hydrogel networks were synthesized via the thiol-Michael addition of Polydopamine(PDA)with thiolated hyaluronic acid.PDA acted as a cross-linking agent and endowed the hydrogel with excellent photothermal property.Meanwhile,a chemotherapeutic agent,doxorubicin(DOX),was loaded in the hydrogel viaπ-πstacking with PDA and an immune-adjuvant,CpG-ODN,was loaded via electrostatic interaction.The release of DOX from the hydrogel was initially slow but accelerated due to near infrared light irradiation.The hydrogels showed remarkably synergistic effect against 4T1 cancer cells and stimulated plenty of cytokines secreting from RAW264.7 cells.Moreover,the hydrogels eradicated orthotopic murine breast cancer xenografts and strongly inhibited metastasis after intratumoral injection and light irradiation.The high anticancer efficiency of this chemo-photothermal immunotherapy resulted from the strong synergistic effect of the versatile hydrogels,including the evoked host immune response.The combinational strategy of chemo-photothermal immunotherapy is promising for highly effective treatment of breast cancer.

关键词： Breast cancer Polydopamine Hydrogel Intratumoral injection Photothermal Chemotherapy Immunotherapy Metastasis

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Dimethylamino group modified Polydopamine nanoparticles with positive charges to scavenge cell-free DNA for rheumatoid arthritis therapy

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Bioactive Materials 2022年第12期7卷 409-420页

作者： Ying Chen Yonglin Wang Xianfang Jiang Jinhong Cai Yuting Chen Hanji Huang Yuan Yang Li Zheng Jinmin Zhao Ming Gao Guangxi Engineering Center in Biomedical Materials for Tissue and Organ Regeneration The First Affiliated Hospital of Guangxi Medical UniversityNanning530021China Guangxi Collaborative Innovation Center of Regenerative Medicine and Medical Bioresource Development and Application The First Affiliated Hospital of Guangxi Medical UniversityNanning530021China Department of Orthopedics The First Affiliated Hospital of Guangxi Medical UniversityNanning530021China Department of Oral Radiology College of Stomatology of Guangxi Medical UniversityNanning530021China Guangxi Key Laboratory of Regenerative Medicine International Joint Laboratory on Regeneration of Bone and Soft TissuesThe First Affiliated Hospital of Guangxi Medical UniversityNanning530021China

Excessive cell-free DNA(cfDNA)released by damaged or apoptotic cells can cause inflammation,impacting the progression of rheumatoid arthritis(RA).cfDNA scavengers,such as cationic nanoparticles(NPs),have been demonstrated as an efficient strategy for treating RA.However,most scavengers are limited by unfavorable biocompatibility and poor scavenging efficacy.Herein,by exploiting the favorable biocompatibility,biodegradability and bioadhesion of Polydopamine(P),we modified P with dimethylamino groups to form altered charged DPs to bind negatively charged cfDNA for RA therapy.Results showed that DPs endowed with superior binding affinity of cfDNA and little cytotoxicity,which effectively inhibited lipopolysaccharide(LPS)stimulated inflammation in vitro,resulting in the relief of joint swelling,synovial hyperplasia and cartilage destruction in RA rats.Significantly,DPs with higher DS of bis dimethylamino group exhibited higher positive charge density and stronger cfDNA binding affinity,leading to excellent RA therapeutic effect among all of the treated groups,which was even close to normal rats.These finding provides a novel strategy for the treatment of cfDNA-associated diseases.

关键词： Cell-free DNA Polydopamine Rheumatoid arthritis Nucleic acid binding affinity Immunotherapy

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Synergistic chemotherapy/PTT/oxygen enrichment by multifunctional liposomal Polydopamine nanoparticles for rheumatoid arthritis treatment

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Asian Journal of Pharmaceutical Sciences 2024年第1期19卷 86-102页

作者： Xiaoling Fu Yutong Song Xianquan Feng Zhihong Liu Wenhao Gao Hongtao Song Qian Zhang School of Pharmacy Fujian Medical UniversityFuzhou 350108China Fuzong Clinical Medical College of Fujian Medical University Fuzhou 350025China First school of clinical medicine Nanjing Medical UniversityNanjing 211166China

Amultifunctional liposomal Polydopamine nanoparticle(MPM@Lipo)was designed in this study,to combine chemotherapy,photothermal therapy(PTT)and oxygen enrichment to clear hyperproliferating inflammatory cells and improve the hypoxic microenvironment for rheumatoid arthritis(RA)treatment.MPM@Lipo significantly scavenged intracellular reactive oxygen species and relieved joint hypoxia,thus contributing to the repolarization of M1 macrophages into M2 phenotype.Furthermore,MPM@Lipo could accumulate at inflammatory joints,inhibit the production of inflammatory factors,and protect cartilage in vivo,effectively alleviating RA progression in a rat adjuvant-induced arthritis model.Moreover,upon laser irradiation,MPM@Lipo can elevate the temperature to not only significantly obliterate excessively proliferating inflammatory cells but also accelerate the production of methotrexate and oxygen,resulting in excellent RA treatment effects.Overall,the use of synergistic chemotherapy/PTT/oxygen enrichment therapy to treat RA is a powerful potential strategy.

关键词： Polydopamine Thermosensitive liposomes Photothermal therapy Oxygen generation Rheumatoid arthritis

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Inhaled curcumin mesoporous Polydopamine nanoparticles against radiation pneumonitis

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Acta Pharmaceutica Sinica B 2022年第5期12卷 2522-2532页

作者： Ting Chen Bo Zhuang Yueqi Huang Yan Liu Bochuan Yuan Wanmei Wang Tianyu Yuan Lina Du Yiguang Jin Guangdong Pharmaceutical University Guangzhou 510006China Department of Pharmaceutical Sciences Beijing Institute of Radiation MedicineBeijing 100850China Department of Chemical Defense Institute of NBC DefenseBeijing 102205China

Radiation therapy is an effective method to kill cancer cells and shrink tumors using highenergy X-ray or γ-ray. Radiation pneumonitis(RP) is one of the most serious complications of radiation therapy for thoracic cancers, commonly leading to serious respiratory distress and poor prognosis. Here,we prepared curcumin-loaded mesoporous Polydopamine nanoparticles(CMPN) for prevention and treatment of RP by pulmonary delivery. Mesoporous Polydopamine nanoparticles(MPDA) were successfully synthesized with an emulsion-induced interface polymerization method and curcumin was loaded in MPDA via π-π stacking and hydrogen bonding interaction. MPDA owned the uniform spherical morphology with numerous mesopores that disappeared after loading curcumin. More than 80% curcumin released from CMPN in 6 h and mesopores recovered. CMPN remarkably protected BEAS-2 B cells from γ-ray radiation injury by inhibiting apoptosis. RP rat models were established after a single dose of15 Gy^(60)Co γ-ray radiation was performed on the chest area. Effective therapy of RP was achieved by intratracheal administration of CMPN due to free radical scavenging and anti-oxidation ability, and reduced proinflammatory cytokines, high superoxide dismutase, decreased malondialdehyde, and alleviated lung tissue damages were observed. Inhaled CMPN paves a new avenue for the treatment of RP.

关键词： Radiation pneumonitis Curcumin Mesoporous Polydopamine Nanoparticle Pulmonary delivery Inhalation Free radical scavenging

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