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High permeability poly(vinylidene fluoride)ultrafiltration membrane doped with polydopamine modified TiO_(2) nanoparticles

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Chinese Journal of Chemical Engineering 2020年第12期28卷 3152-3158页

作者： Qi Zhang Zhaoliang Cui Weixing Li State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 210009China National Engineering Research Center for Special Separation Membrane Nanjing Tech UniversityNanjing 210009China

In order to improve the water permeability of poly(vinylidene fluoride)(PVDF)ultrafiltration(UF)membranes with low molecular weight cut-off(MWCO),polydopamine(PDA)was employed in the membrane preparation process.Owing to itsmerits of material-independent adhesion,PDAwas coated on inorganic particles or added in coagulation bath to tailor the final membrane structure and property.The introduction of PDA broke through the permeability/selectivity trade-off of the PVDF membrane.By adding the PDA coated titaniumdioxide(PDA/TiO2)nanoparticles,water flux increased by 287% while MWCO kept similar with the pristine PVDF membrane.Thermodynamics and Kinetics of the PVDF/additives/non-solvent were analyzed and shown that nanoparticles reduced the thermodynamic stability and increased the phase separation speed,and the speed can be adjusted using different nanoparticles.Additionally,X-ray diffraction(XRD)test indicated that PVDF crystalline form changed fromαphase to β phase after adding different nanoparticles.Permeability/selectivity trade-offwas broken through by DA addition in coagulation bath.Compared with the original PVDF membrane,when the DA concentration of the coagulation bath was 2.0 g·L^−1,water flux increased by 312%,and MWCO of the PVDF membrane ranged in 10,000 to 20,000 Da as well as contact angle decreased from 81.4°to 45°.

关键词： Poly(vinylidene fluoride)membrane polydopamine Permeability/selectivity trade-off

Nanoparticles modified by polydopamine: Working as “drug” carriers

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Bioactive Materials 2020年第3期5卷 522-541页

作者： Anting Jin Yitong Wang Kaili Lin Lingyong Jiang Department of Oral&Cranio-Maxillofacial Surgery Shanghai Ninth People's HospitalCollege of StomatologyShanghai Jiao Tong University School of MedicineNational Clinical Research Center for Oral DiseasesShanghai Key Laboratory of Stomatology&Shanghai Research Institute of StomatologyShanghai200011PR China

Inspired by the mechanism of mussel adhesion,polydopamine(PDA),a versatile polymer for surface modification has been discovered.Owing to its unique properties like extraordinary adhesiveness,excellent biocompatibility,mild synthesis requirements,as well as distinctive drug loading approach,strong photothermal conversion capacity and reactive oxygen species(ROS)scavenging facility,various PDA-modified nanoparticles have been desired as drug carriers.These nanoparticles with diverse nanostructures are exploited in multifunctions,consisting of targeting,imaging,chemical treatment(CT),photodynamic therapy(PDT),photothermal therapy(PTT),tissue regeneration ability,therefore have attracted great attentions in plenty biomedical applications.Herein,recent progress of PDA-modified nanoparticle drug carriers in cancer therapy,antibiosis,prevention of inflammation,theranostics,vaccine delivery and adjuvant,tissue repair and implant materials are reviewed,including preparation of PDA-modified nanoparticle drug carriers with various nanostructures and their drug loading strategies,basic roles of PDA surface modification,etc.The advantages of PDA modification in overcoming the existing limitations of cancer therapy,antibiosis,tissue repair and the developing trends in the future of PDA-modified nanoparticle drug carriers are also discussed.

关键词： Surface modification polydopamine Nanoparticles Drug carriers

Melanin/polydopamine-based nanomaterials for biomedical applications

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Science China Chemistry 2019年第2期62卷 162-188页

作者： Chao Qi Lian-Hua Fu Han Xu Tian-Fu Wang Jing Lin Peng Huang Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging Carson International Cancer Center Laboratory of Evolutionary Theranostics School of Biomedical Engineering Health Science Center Shenzhen University Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronic Engineering Shenzhen University

The natural melanin is one kind of ubiquitous biological pigments, which is produced in melanosomes and widely distributed in living organisms. The synthetic melanin, often known as polydopamine(PDA), has similar chemical compositions and physical properties to natural melanin. In recent years, both natural melanin and PDA have aroused increased research interests in biomedical fields owing to their inherent biocompatibility, antioxidant activity, free-radical scavenging, metal ion chelation,strong near-infrared absorption and high photothermal conversion efficiency. Inspired by these fascinating properties, melanin and PDA have been widely used as building blocks for the construction of multifunctional nanoplatforms for various biomedical applications. This review focuses on the state-of-the-art progress in melanin/PDA-based nanomaterials, which covers from their preparation methods to biomedical applications including bioimaging, treatment, theranostics, antibacterial, UV/radiation protection, biosensor and tissue engineering. Moreover, the current trends and the future prospects of melanin/PDA-based nanomaterials are also discussed.

关键词： melanin polydopamine nanomaterials biomedical applications

A mussel-induced approach to secondary functional cross-linking 3-aminopropytriethoxysilane to modify the graphene oxide membrane for wastewater purification

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Chinese Chemical Letters 2023年第1期34卷 426-434页

作者： Wenwen Tu Yucheng Liu Mingyan Chen Lili Ma Lingli Li Bing Yang College of Chemistry and Chemical Engineering Southwest Petroleum UniversityChengdu 610500China Research Institute of Industrial Hazardous Waste Disposal and Resource Utilization Southwest Petroleum UniversityChengdu 610500China

Graphene oxide(GO)with one-atom-thick exhibit remarkable molecule sieving properties,but its low permeance flux renders it difficult to be applied in practice as a high-permeance separation membrane.In this study,we design complex membrane from covalently crosslinked GO,polydopamine(PDA),and 3-aminopropytriethoxysilane(APTES)as building blocks to fabricate the high-permeance GO-based membrane via the vacuum filtration method.A branched crosslinking product(PDA/APTES)working as a clamp grasped the hydrophilic functional groups(hydroxyl,epoxy,carboxyl)on GO for improving the GO membrane flux.The interlayer structure of the GO membrane was optimized according to the crosslinker concentration,reaction time,initial p H,and temperature for RGO/PDA/APTES(RGPA)in this study.At the optimized reaction conditions including the crosslinker concentration of 1.4 m L/L,the temperature of 80°C,the time of 16 h,and the initial p H of 8.5 for RGPA mixture,the interlayer gallery of RGPA membrane was effectively tunes,endowing high flux ranging from 11.98 L m^(-2)h^(-1)to 1823.97 L m^(-2)h^(-1).Besides,the RGPA membrane ensured the high rejections to dye solutions such as methylene blue(MB)(>99%)and congo red(CR)(>90%).Meanwhile,the superior reusable performance of the RGPA membrane was achieved,together with the rejections for MB and CR to 96.32%and 93.1%after 4 cycles,respectively.Also,the RGPA membrane possessed superior anti-fouling performances for bovine serum albumin(BSA)aqueous solution and excellent stabilities in harsh conditions(p H 3,7 and 11).Grafting the crosslinker onto GO nanosheets exhibits the distinct advantages of achieving the high flux,high rejections to dyes,and superior reusable performance of membranes,posing a great application potential for membrane separation technology in wastewater treatment.

关键词： Cross-linked graphene oxide polydopamine APTES High flux membranes Dye separation

Novel polyethyleneimine/TMC-based nanofiltration membrane prepared on a polydopamine coated substrate

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Frontiers of Chemical Science and Engineering 2018年第2期12卷 273-282页

作者： Zhe Yang Xiaoyu Huang Jianqiang Wang Chuyang Y. Tang Department of Civil Engineering the University of Hong Kong Hong Kong China

Most commercial NF membranes are negatively charged at the pH range of a typical feed solution. In order to enhance the removal of cations （such as Mg2＋ or Ca2＋）, we utilized polyethyleneimine （PEI） and trimesoyl chloride （TMC） to perform interfacial polymerization reaction on a polydopamine coated hydrolyzed polyacry-lonitrile substrate to obtain a positively charged nanofiltration membrane. Effects ofpolydopamine coating time, PEI concentration, TMC reaction time and concentration on the membrane physicochemical properties and separation performance were systematically investigated using scanning electron microscopy, streaming potential and water contact angle measurements. The optimal NF membrane showed high rejection for divalent ions （93.6±2.6% for MgSO4, 92.4±1.3% for MgCl2, and 90.4±2.1% for Na2SO4）, accompanied with NaCl rejection of 27.8±2.5% with a permeation flux of 17.2±2.8 L.m-2.h-1 at an applied pressure of 8 bar （salt concentrations were all 1000 mg.L-1）. The synthesized membranes showed promising potentials for the applications of water soft-ening.

关键词： nanofiltration polyethyleneimine trimesoyl chloride polydopamine positively charged rejection layer

The recent research progress of polyphenol-derived biomaterials in wound repair

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Biosurface and Biotribology 2023年第4期9卷 114-128页

作者： Shuya Zhao Lu Han Liwei Yan Xiong Lu Institute of Biomedical Engineering College of MedicineSouthwest Jiaotong UniversityChengduSichuanChina Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengduSichuanChina School of Medicine and Pharmaceutics Key Laboratory of Marine DrugsMinistry of EducationOcean University of ChinaQingdaoShandongChina

The clinical requirements for wound care are increasing daily, and the global wound dressing market is expanding;however, the research and development of new wound dressings are imminent. Natural biomolecules such as polyphenols, have been widely used in this field of vision. Owing to their unique anti-oxidative, adhesive, antibacterial and other bioactive functions, researchers have developed a series of wound dressings with excellent performance and applied them to a variety of biomaterials, such as hydrogels, nanofibers, films and scaffolds. They can effectively promote angiogenesis and fibroblast migration and proliferation, scavenge active oxygen free radicals, inhibit excessive in-flammatory reactions at wound sites and ultimately accelerate wound healing. The authors summarise the latest progress in polyphenol-derived biomaterials in skin wound repair to provide inspiration for future wound dressing research.

关键词： biomaterials biomedical application injectable hydrogels physically cross-linked gel polydopamine wound healing

Durability of AZ31 magnesium biodegradable alloys polydopamine aided.Part 2:Ageing in Hank’s solution

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Journal of Magnesium and Alloys 2019年第2期7卷 218-226页

作者： Anna Carangelo Annalisa Acquesta Tullio Monetta Department of Chemical Engineering Materials and Industrial ProductionUniversity of Napoli Federico IIPiazzale Tecchio 8080125 NapoliItaly

Magnesium alloys are candidates as biodegradable medical materials due to their biocompatibility and favorable mechanical properties.Unfortunately,the high corrosion rate in physiological media and the release of hydrogen,limit their widespread use in biomedical applications.In this work,an intermediate coating based on polydopamine(PDOPA),between Mg substrate and an organic coating,was used to decreasing the degradation rate of AZ31 magnesium alloy,during the long-term exposure in simulated body fluid.Electrochemical Impedance Spectroscopy measurements were carried out to study the corrosion resistance of samples.Results demonstrated that the PDOPA interlayer determined the reduction of the substrate degradation rate.The results were interpreted supposing a synergistic effect which occurred when PDOPA and the organic coating were used together.

关键词： polydopamine AZ31 Magnesium alloy Electrochemical characterization Degradation rate

A cobalt oxide@polydopamine-reduced graphene oxide-based 3D photothermal evaporator for highly efficient solar steam generation

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Tungsten 2020年第4期2卷 423-432页

作者： Ting Gao Xuan Wu Gary Owens Hao‑Lan Xu Future Industries Institute University of South AustraliaAdelaideSA 5095Australia

Improving the evaporation rate and energy efficiency of solar steam generation is very important to facilitate real-world applications for clean water production.In this work,Co_(3)O_(4)@polydopamine(PDA)nanoparticles were synthesized and combined with reduced graphene oxide(rGO)to fabricate a new Co_(3)O_(4)@PDA-rGO photothermal aerogel.The obtained pho-tothermal aerogel sheet was thereafter used to prepare both two-dimensional(2D)and three-dimensional(3D)photothermal evaporators for solar steam generation.Due to the excellent light absorption and hydrophilicity of the photothermal aerogel,a high evaporation rate of 1.60 kg·m^(−2)·h^(−1) was achieved for the 2D photothermal evaporator.While for the 3D evaporator,the evaporation rate was dramatically increased to 3.71 kg·m^(−2)·h^(−1) with a corresponding light-to-vapor energy efficiency of 107%.This was attributed to an increased evaporation surface area,decreased energy loss from the top evaporation surface to the environment,and energy gain from the environment on the side evaporation surface.The 3D evaporator also showed excellent practical performance in seawater desalination thus demonstrating great potential for real-world applications.

关键词： Solar-steam generation Cobalt oxide polydopamine Reduced graphene oxide Photothermal materials Seawater desalination

Facile Preparation of Water-Soluble and Cytocompatible Small-Sized Chitosan-polydopamine Nanoparticles

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Chinese Journal of Chemistry 2017年第6期35卷 931-937页

作者： Yunzhou Ni Feng Chen Leilei Shi Gangsheng Tong Jie Wang Huimei Li Chunyang Yu Yongfeng Zhou School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai 200240 China State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University Shanghai 200240 China Instrumental Analysis Center Shanghai Jiao Tong University Shanghai 200240 China

In this paper, a kind of novel water-soluble chitosan-polydopamine （CHT-PDA） nanoparticles with a hydrody- namic diameter （Dh） around 10 nm were reported by the combination of self-polymerization of PDA and electro- static complexation between PDA and CHT in water/DMSO （W/D） mixture at the molar fraction of DMSO （XDMSO =0.37）. The preparation method was efficient with a yield of 98% around. The as-prepared water-soluble CHT-PDA nanoparticles exhibited effective UV-screen ability, enhanced visible-light transmittance and good cyto- compatibility via MTT assay, which might be used in transparent formulation for UV protection usage, especially in biological field including sun care application.

关键词： chitosan polydopamine nanoparticles UV-screen visible-light transmittance