Stability of polydopamine and poly(DOPA) melanin-like films on the surface of polymer membranes under strongly acidic and alkaline conditions

Wei, Houliang; Ren, Jun; Han, Bo; Xu, Li; Han, Lulu; Jia, Lingyun

doi:10.1016/j.colsurfb.2013.04.008

Cited by 225 publications

(171 citation statements)

References 25 publications

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“…The dopamine-grafted CNFs provided the highest tensile strength, Young's modulus and strainat-break among the fibrils, comparing the handsheets made without addition of retention aid, indicating successful stress-release in the papers during loading. The strengthening effect brought about by the created films is remarkable but also comes with an increased dewatering time and care should also be taken due to their sensitivity to air and light, which by oxidation could lead to the formation of quinone structures, bringing yellow, orange or brown discolouration (Zhang and Dryhurst 1993;Zhu et al 2009;Wei et al 2013). In the present work this was however not a problem.…”

Section: Discussionmentioning

confidence: 66%

Chemically modified cellulose micro- and nanofibrils as paper-strength additives

et al. 2017

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Chemically modified cellulose micro-and nanofibrils were successfully used as paper strength additives. Three different kinds of cellulose nanofibrils (CNFs) were studied: carboxymethylated CNFs, periodate-oxidised carboxymethylated CNFs and dopamine-grafted carboxymethylated CNFs, all prepared from bleached chemical fibres of dissolving grade, and one microfibrillated cellulose from unbleached kraft fibres. In addition to mechanical characterization of the final paper sheets the fibril retention, sheet density and sheet morphology were also studied as a function of addition of the four different cellulose fibrils. In general, the cellulose fibrils, when used as additives, significantly increased the tensile strength, Young's modulus and strain-atbreak of the paper sheets. The effects of the different fibrils on these properties were compared and evaluated and used to analyse the underlying mechanisms behind the strengthening effect. The strengthenhancing effect was most pronounced for the periodate-oxidised CNFs when they were added together with polyvinyl amine (PVAm) or poly(dimethyldiallylammonium chloride) (pDADMAC). The addition of periodate-oxidised CNFs, with pDADMAC as retention aid, resulted in a 37% increase in tensile strength at a 2 wt% addition and an 89% increase at a 15 wt% addition (from 67 to 92 and 125 kNm/kg, respectively) compared to a reference with only pDADMAC. Wet-strong sheets with a wet tensile index of 30 kNm/kg were also obtained when periodate-oxidised CNFs and PVAm were combined. This significant increase in wet strength is suggested to be the result of a formation of cross-links between the aldehyde groups, introduced by the periodate oxidation, and hydroxyl groups on the lignocellulosic fibres and the primary amines of PVAm. Even though less significant, there was also an increase in wet tensile strength when pDADMAC was used together with periodate-oxidised fibrils which shows that the aldehyde groups are able to increase the wet strength without the presence of the primary amines of the PVAm. As an alternative method to strengthen the fibre network, carboxymethylated CNFs grafted with dopamine, by an ethyl dimethylaminopropyl carbodiimide coupling, were used as a strength additive. When used as an additive, these CNFs showed a strong propensity to form films on and around the fibres and Electronic supplementary material The online version of this article (doi:10.1007/s10570-017-1387-6) contains supplementary material, which is available to authorized users. Cellulose (2017) 24:3883-3899 DOI 10.1007/s10570-017-1387 significantly increased the mechanical properties of the sheets. Their addition resulted in an increase in the Younǵs modulus by 41%, from 5.1 to 7.2 GPa, and an increase in the tensile strength index of 98% (from 53 to 105 kNm/kg) with 5 wt% retained dopaminegrafted CNFs.

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Section: Discussionmentioning

confidence: 66%

Chemically modified cellulose micro- and nanofibrils as paper-strength additives

et al. 2017

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“…Photoelectrochemical experiments were performed in 0.1 M Na 2 SO 4 , as PDA removal may occur for prolonged exposure to strongly acidic and alkaline pH [39,40]. Fig.…”

Section: Resultsmentioning

confidence: 99%

Highly controlled coating of biomimetic polydopamine in TiO2 nanotubes

Loget

Yoo

Mazare

et al. 2015

Electrochemistry Communications

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International audienceHighly controlled coating of biomimetic polydopamine (PDA) was achieved on titanium dioxide nanotubes (TiO2 NTs) by exposing TiO2 NT arrays to a slightly alkaline dopamine solution. The thin films act as photonic sensitizers (enhancing photocurrents and photodegradation) in the visible light range. The PDA coatings can furthermore be used as a platform for decorating the TiO2 NTs with different co-catalysts and metal nanoparticles (NPs)

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“…Many researches claimed that the mussel-inspired coating showed an excellent stability in acidic and weak alkalic conditions, and a poor resistance only to strong alkaline solution [53,116]. Furthermore, the mussel-inspired coatings exhibit dissimilar stability on different polymer membranes.…”

Section: As a Surface Modifier By Direct Deposition On Membranementioning

confidence: 99%

“…Chemical properties of dopamine and PDA as representatives of catecholamine and catecholamine-based materials. wide pH range as described in Section 3.1 [53]. Thanks to the above advantages, the interest in the surface engineering of membrane by catecholamine has surged in recent years, leading to a large number of studies involving this hot topic.…”

Section: Introductionmentioning

confidence: 99%