Multifunctional Polyphenols- and Catecholamines-Based Self-Defensive Films for Health Care Applications

Dhand, Chetna; Harini, Sriram; Mayandi, Venkatesh; Dwivedi, Neeraj; Ng, Alice Jie Ying; Liu, Shouping; Verma, Navin Kumar; Ramakrishna, Seeram; Beuerman, Roger W.; Loh, Xian Jun; Lakshminarayanan, Rajamani

doi:10.1021/acsami.5b09633

Cited by 77 publications

(56 citation statements)

References 71 publications

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“…Compared with organic fouling, membrane fouling caused by microorganisms is more challenging because of the formation of biofilms and extracellular polymeric substances . It is well known that TA is an effective natural antimicrobial agent that is capable of inactivating these microorganisms through the chelating of Ca 2+ and Mg 2+ on the outer membrane, the disordering of the electrical balance, and ultimately, the damage of the cellular membrane structure. We estimated that the TA‐modified membrane surface may have been able to exhibit antibiofouling properties, including anti‐attachment and/or inactivation of the adhered microorganisms.…”

Section: Resultsmentioning

confidence: 99%

“…Bacteria‐induced biofouling was performed with Escherichia coli K1 ( E. coli K1) as the typical bacterial strain. The bacterial suspension was prepared with typical methods with slight modification as summarized here. A single colony of E. coli K1 was isolated from streak plates, then dispersed in 10 mL of fresh Luria‐Bertani broth, and cultivated in incubator (37 °C) under shaking for 18 h. After that, 200 μL of the inoculum was transferred into fresh broth, incubated for 2 h, and harvested in the mid‐log‐phase period.…”

Section: Methodsmentioning

confidence: 99%

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Tannic acid coating and in situ deposition of silver nanoparticles to improve the antifouling properties of an ultrafiltration membrane

Zhao

Nguyen

et al. 2018

J of Applied Polymer Sci

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The construction of antifouling membranes has been a desirable approach for addressing membrane‐fouling issues in the ultrafiltration (UF) process. Antifouling means antiadhesive and antimicrobial; however, few researchers have achieved both properties in a facile and effective manner. In this article, we report a direct tannic acid (TA) coating method combined with the in situ deposition of silver nanoparticles (Ag NPs); this was used to improve the antifouling properties of a positively charged polymeric UF membrane. The results show that the TA–Ag NP modified membranes showed improved protein resistance (flux recovery rate = 71.2% after modification vs 17.8% before modification) and less attachment of bacteria (Escherichia coli K1) on the membrane surface and reduced cell viability in the resulting bacterial suspension (reduced by ≥90%) because of the combined antimicrobial properties of both the TA and Ag NPs. This indicated that our modification method was promising for UF membrane antifouling applications. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47314.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Tannic acid coating and in situ deposition of silver nanoparticles to improve the antifouling properties of an ultrafiltration membrane

Zhao

Nguyen

et al. 2018

J of Applied Polymer Sci

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“…Our results do suggest that, depending on the intensity of the oxidative reaction, chemically-distinct, dark-or light-colored MN-like pigments could be generated depending on the type of precursor that is present. Such physically and chemically distinct MN materials could find different applications 7,16,[43][44][45][46] or possess different cell-biological properties [47][48][49][50][51][52] In addition, our results suggest that the absence of a dark color does not necessarily mean the absence of MN-like materials which may have implications for the evaluation of histological or fossil specimens. [53][54] …”

Section: 323uv-vis Spectroscopy and Fluorescence Emissionmentioning

confidence: 89%

Dark- or Light-Colored Melanins: Generating Pigments Using Fe2+ and H2O2

Vercruysse

Russell²,

Knight³

et al. 2017

Preprint

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We have studied the formation of melanin-like pigments from catechol or pyrogallol and a wide range of other phenolic compounds using Fe 2+ and H 2 O 2 . Combining UV_Vis spectroscopic measurements and size-exclusion chromatography analyses we evaluated the impact of the intensity of the oxidation reaction by varying the concentration of H 2 O 2 present in the reaction mixtures. All compounds tested, except tyrosine, reacted readily leading to mixtures that were black, brown or yellow-orange in color. For many compounds tested, the use of increasing concentrations of H 2 O 2 resulted in either precipitation of the pigment or the formation of a soluble, lighter-colored pigment. With catechol or pyrogallol as model compounds, and using different concentrations of H 2 O 2 , several materials were synthesized, purified and dried. The physic-chemical properties of these materials were compared to the properties of melanin-like pigments synthesized from the same precursors using air-oxidation in an alkaline environment. For both precursors, a distinct chemical change, as judged from FT-IR spectroscopy, was introduced in the melanin structures when using H 2 O 2 as the oxidizing agent and the relative intensity of this distinct signal strengthened with increasing concentration of H 2 O 2 used in the reaction. In general, our results suggest that depending on the precursor molecule and the intensity of the oxidizing reaction conditions involved, light-or dark-colored melanin-like pigments can be generated. This may be an important factor when evaluating the visible outlook of histological or archeological specimens: the presence of a lighter color or the absence of a dark color may not necessarily mean the absence of melanin-like biomolecules.

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“…Enzyme Catalyzed Oxidation : The natural formation of eumelanins involves the tyrosinase‐catalyzed oxidation of l ‐tyrosine, ultimately to DHI and 5,6‐dihydroxyindole‐2‐carboxylic acid and their quinone analog starting materials . Similarly, enzymes can be used to catalyze the oxidative polymerization of catecholamines . For example, laccase and tyrosinase have each been used to activate the catechol groups of a range of catecholamines for subsequent polymerization, with laccase also promoting polymerization under acidic conditions .…”

Section: Catecholamine Polymers: Chemistry and Structurementioning

confidence: 99%

“…Similarly, enzymes can be used to catalyze the oxidative polymerization of catecholamines . For example, laccase and tyrosinase have each been used to activate the catechol groups of a range of catecholamines for subsequent polymerization, with laccase also promoting polymerization under acidic conditions . Further, DHI, l ‐DOPA, and dopamine have all been used to make coatings in the presence of hydrogen peroxide and horse radish peroxidase, the enzyme catalyzing the reaction as no observable coating occurred with just the peroxide in solution.…”

Section: Catecholamine Polymers: Chemistry and Structurementioning

confidence: 99%

Versatile Surface Modification Using Polydopamine and Related Polycatecholamines: Chemistry, Structure, and Applications

Barclay

Hegab

Clarke

et al. 2017

Adv Materials Inter

300

223

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Almost ten years ago, Lee et al. [13] formulated a universal adhesive coating based on observation of the strong attachment by mussels through their byssal threads to virtually all types of inorganic and organic surfaces. The amino acid compositions of the mussel foot proteins that generate the attachment are rich in catechol and amine groups. [13][14][15] These groups associate under marine conditions, forming strong covalent and noncovalent interactions with substrates. [13] This led to the idea that both catechol and amine groups were crucial in forming robust, wide spectrum adhesive nanolayers [16,17] and consequently dopamine was conceived as a powerful building block for spontaneous deposition of thin polymer films. The dopamine monomer is deposited onto unadulterated surfaces through self-assembly and oxidative cross-linking from mild pH aqueous solution in a rapid reaction. This results in a durable, nanoscale, conformal, and hydrophilic coating that can be readily modified to introduce specific surface chemistries for a particular application. [18][19][20][21][22] These bioinspired, polydopamine materials are chemically and structurally indistinguishable from eumelanins found in the human body, [23,24] providing excellent biocompatibility. Additionally, polydopamine has broad electromagnetic absorption and excellent photothermal energy conversion [25] as well as having ionic-electronic hybrid conductivity. [26] Along with the excellent coating performance, these properties provide a vast array of potential applications for polydopamine materials.In this article, we explain what is known about polydopamine and related catecholamine coatings; their formation, the adhesion mechanism, and their physicochemical properties and we also review the applications of these materials (Figure 1). Since 2011, there have been a number of reviews on this subject matter, including general reviews on the physicochemical properties of polydopamine coatings [11,20,[27][28][29] and their applications. [20,27,30] There are also a number of more specific reviews on the chemical synthesis and modulation of polycatecholamine coatings, [31] the biomedical applications of these coatings, [8,[32][33][34] their electronic properties, [26,35] the use of polydopamine to make films at fluid interfaces, [36] in hierarchically constructed particles, [33] and capsules, [30] exploitation of polycatecholamine coatings in membrane filtration, [37] polydopamine-derived carbon materials, [38] and the use of coordination chemistry in catechol-based materials. [39] Nonetheless, this area of research is growing so rapidly [25,27] that many recent Polydopamine and related polycatecholamines can be easily deposited onto almost any surface from mild, aqueous solution. This results in durable, nanoscale coatings that exhibit high biocompatibility and have useful chemical and electronic properties. Additionally, these materials can be readily chemically and physically modified, and consequently, they are used extensively for surface modification. This ...

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Multifunctional Polyphenols- and Catecholamines-Based Self-Defensive Films for Health Care Applications

Cited by 77 publications

References 71 publications

Tannic acid coating and in situ deposition of silver nanoparticles to improve the antifouling properties of an ultrafiltration membrane

Tannic acid coating and in situ deposition of silver nanoparticles to improve the antifouling properties of an ultrafiltration membrane

Dark- or Light-Colored Melanins: Generating Pigments Using Fe2+ and H2O2

Versatile Surface Modification Using Polydopamine and Related Polycatecholamines: Chemistry, Structure, and Applications

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