Enhanced hydrophilic and antifouling polyacrylonitrile membrane with polydopamine modified silica nanoparticles

Tripathi, Bijay P.; Dubey, Nidhi C.; Subair, Riyas; Choudhury, Soumyadip; Stamm, Manfred

doi:10.1039/c5ra22160a

Cited by 91 publications

(43 citation statements)

References 51 publications

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“…The incorporation of PDA remarkably improved compatibility and adhesion between nano SiO 2 and PP matrix which is mainly responsible for excellent mechanical properties . The incorporation of modified SiO 2 nano‐particle SiO 2 @polydopamine also tremendously improved hydrophilicity of PP matrix that may contribute to dyeing of PP product . When 1% wt SiO 2 @polydopamine and a certain amount of β nucleating agent was added, the impact strength of composite reached the maximum value 12.60 k J/m 2 (improving 127% compared to pure PP), the bending strength reached 41.85 MPa, the bending modulus was 2192 MPa, the composite possessed hydrophilic performance with the water contact angle of 88.32°.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous enhancements of mechanical properties and hydrophilic properties of polypropylene via nano‐silicon dioxide modified by polydopamine

Qiu

Wang

Yang

et al. 2017

J of Applied Polymer Sci

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This study is focused on the development of high‐performance composite materials based on nano silicon dioxide (nano‐SiO2) modified by polydopamine (PDA). A facile one‐step method was developed to synthesize core–shell structured SiO2@polydopamine (PDA) nanospheres. During the synthesis, a PDA shell was simultaneously coated on the SiO2 nanospheres to form the core–shell nanostructure which was blended with polypropylene (PP) and β nucleating agent (β‐NA) to enhance both mechanical and hydrophilic properties. Nano‐SiO2 particles modified by PDA (SiO2@polydopamine) influence the crystallization of PP seriously. The results indicated that when 1%wt SiO2@polydopamine was added, the impact strength of composite reached the maximum value 12.60k J/m2 increasing 137% compared with PP, the bending strength and bending modulus decreased slightly reaching 41.85 MPa, and 2192 MPa, respectively, the composite possessed hydrophilic performance with the water contact angle of 88.32°. β nucleating agent was used in all formulations, the synergistic effect toward mechanical properties with SiO2@polydopamine was studied. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45004.

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Section: Introductionmentioning

confidence: 99%

Simultaneous enhancements of mechanical properties and hydrophilic properties of polypropylene via nano‐silicon dioxide modified by polydopamine

Qiu

Wang

Yang

et al. 2017

J of Applied Polymer Sci

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“…Likewise, the neurotransmitter dopamine (DA) contains the same catechol functional group as the chain of DOPA‐K residues, as well as the same amine functional group, and can be applied in the same way as Mefp‐5 . PDA has the ability to deposit on hydrophobic or hydrophilic surfaces via rearrangement of the DA molecules, in the presence of oxygen and in a weak alkaline buffer solution . This layer serves as a platform for surface modification since PDA forms strong covalent and non‐covalent interactions with substrates, as well as covalent interactions with several serum adhesive proteins, including collagen …”

Section: Introductionmentioning

confidence: 99%

Evaluation of bone marrow stem cell response to PLA scaffolds manufactured by 3D printing and coated with polydopamine and type I collagen

et al. 2018

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The majority of synthetic polymers used in 3 D printing are not designed to promote specific cellular interactions and hence possess limited bioactivity. Most of the strategies proposed to overcome this limitation demand multiple and expensive processing steps. This study aimed to evaluate the surface modification of 3D-printed poly(lactic acid) (PLA) scaffolds with polydopamine (PDA) coating as an alternative strategy to enhance their bioactivity and to facilitate the immobilization of type I collagen (COL I) onto the implant surface. Physical and chemical properties of PLA scaffolds coated with PDA, COL I or both were evaluated. The response of porcine bone marrow stem cells (MSCs) to the coatings was also investigated. The PDA layer improved COL immobilization onto the surface of the PLA scaffolds by 92%. The combination of PDA and COL functionalizations provided the best conditions for early-stage (<7 days) cell response. In addition, the PDA plus COL surface facilitated the robust deposition of extracellular matrix in the first 14 days of cell culture. Although the behavior of the MSCs appeared to be similar for both uncoated PLA and PDA plus COL-coated scaffolds by day 21, cells seeded onto PDA plus COL scaffolds produced substantially higher amounts of alkaline phosphatase. These results indicate that the osteoinductivity of 3D-printed PLA scaffolds can be enhanced by PDA and type I collagen coatings. This surface modification of polymeric scaffolds represents a promising strategy for bone tissue engineering. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2018.

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“…Interestingly, native silica nanoparticles show a two‐step degradation profile (Figure S13, supporting information). The first one, taking place in the range 25–200 °C, corresponds to the thermodesorption of physically adhered water or ethanol molecules, indicating the hydrophilic nature of the silica surface . The second major decomposition occurs from 600 °C onwards, which can be traced to the condensation of the free silanol groups present at the surface.…”

Section: Resultsmentioning

confidence: 84%

An expedient ‘click’ approach for the synthetic evaluation of ester‐triazole‐tethered organosilica conjugates

Singh

Rani

2017

Applied Organom Chemis

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The present work articulates the synthesis of a new series of organo‐functionalized triethoxysilanes derived from versatile carboxylic acids and 3‐azidopropyltriethoxysilane in excellent yields. A proficient and convenient route implicating the Cu(I)‐catalysed 1,3‐cycloaddition of organic azide with terminal alkynes, labelled as click silylation, has been developed for the generation of ester‐triazole‐linked alkoxysilanyl scaffolds (4a–f). All the synthesized compounds have been thoroughly characterized using elemental analysis and Fourier transform infrared, 1H NMR and 13C NMR spectroscopic techniques. Importantly, the fabricated alkoxysilanes are potentially amenable for an in situ sol–gel condensation reaction with silica nanospheres leading to the incorporation of organic functionality via covalent grafting onto the nanostructured particle system. As a proof of concept, a one‐pot preparation of organic–inorganic hybrid nanoparticles is presented using bis‐silane 4 f. The efficiency and selectivity of the prepared nanocomposite towards metal ions is highlighted using adsorption experiments, and the immobilized nanoparticles present a high sensing efficiency towards Cu2+ and Pb2+ ions while demonstrating better response than that of the bulk material.

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Enhanced hydrophilic and antifouling polyacrylonitrile membrane with polydopamine modified silica nanoparticles

Abstract: Hydrophilic and antifouling polydopamine modified silica nanoparticles-polyacrylonitrile membranes were fabricated for water purification applications. High dispersion and better compatibility of modified nanoparticles with polyacrylonitrile was observed.

Cited by 91 publications

References 51 publications

Simultaneous enhancements of mechanical properties and hydrophilic properties of polypropylene via nano‐silicon dioxide modified by polydopamine

Simultaneous enhancements of mechanical properties and hydrophilic properties of polypropylene via nano‐silicon dioxide modified by polydopamine

Evaluation of bone marrow stem cell response to PLA scaffolds manufactured by 3D printing and coated with polydopamine and type I collagen

An expedient ‘click’ approach for the synthetic evaluation of ester‐triazole‐tethered organosilica conjugates

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