Preparation and Performance of Silica-di-Block Polymer Hybrids for BSA-Resistance Coatings

Huang, Huiping; Feng, Yefeng; Qu, Jia

doi:10.3390/ma13163478

Cited by 6 publications

(5 citation statements)

References 45 publications

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“…The initial decomposition temperatures of mCNTs-block (S4) and mCNTs-block (S5) are both 240 °C, which is higher than S3 and mCNTs-block(S3). Both S4 and S5 copolymers have longer PEG side chains, which increases thermal stability because of the enhanced entanglement of long PEG side chains . S3, copolymer of mCNTs-blocks (S3), mCNTs-blocks (S4), and mCNTs-blocks (S5), which decomposes completely at approximately 450 °C because of the same block copolymer structure.…”

Section: Resultsmentioning

confidence: 99%

Grafting an Amphiphilic Block Copolymer to Magnetic-Functionalized Carbon Nanotubes and Their Nanochannels in Membranes

Song

Yin

et al. 2021

ACS Appl. Polym. Mater.

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In this paper, a poly(methyl methacrylate)-block-poly(ethylene glycol methacrylate) [PMMA-b-P(PEGMA)] copolymer is synthesized by reversible addition−fragmentation chain transfer (RAFT) polymerization. Magnetic-functionalized carbon nanotubes (mCNTs-SH) are grafted with different linear polymers on the surface by UV-initiated click chemical reaction. A poly(vinylidene fluoride) (PVDF) composite membrane containing oriented magnetic CNTs (mCNTs) was achieved. Fourier transform infrared (FTIR), gas chromatography, proton nuclear magnetic resonance ( 1 H NMR), and gel permeation chromatography (GPC) were used to verify the P(PEGMA)-b-PMMA-alkynyl structures. Vibrating sample magnetometry (VSM), thermogravimetric analysis (TGA), and transmission electron microscopy (TEM) were used to analyze the magnetic response state of magnetically functionalized CNTs, the influence of copolymers with different block contents on the graft rate, and the surface morphology of magnetically functionalized CNTs, respectively. The molecular weight of P(PEGMA)-b-PMMA, which grafts to the mCNT surface, reaches 17 099 g•mol −1 , together with a maximum graft rate of 40.2%. The surface-grafted mCNTs also show superparamagnetic performance with the saturation magnetic response strength of 13.0 emu/g. When mCNTs are oriented in the composite membrane, the pure water flux increases by more than 60% compared to the pure PVDF membrane. The double interface layer mCNT/PVDF composite membrane has a lower water contact angle (62.8°) and a higher pure water flux (6.5 LMH) than the single interface layer mCNT/PVDF composite membrane with nanochannels.

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Section: Resultsmentioning

confidence: 99%

Grafting an Amphiphilic Block Copolymer to Magnetic-Functionalized Carbon Nanotubes and Their Nanochannels in Membranes

Song

Yin

et al. 2021

ACS Appl. Polym. Mater.

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“…This, in fact, offers a facile approach toward the formation of OEGMA-decorated silica nanoparticle dispersions, hydrogels, and coatings. Such materials can find applications in several fields, for example, as emulsifiers for the formation of Pickering emulsions [ 39 ] or as thermo-responsive hybrid coatings with protein resistance [ 40 ].…”

Section: Introductionmentioning

confidence: 99%

Controlled Amphiphilicity and Thermo-Responsiveness of Functional Copolymers Based on Oligo(Ethylene Glycol) Methyl Ether Methacrylates

Christopoulou,

Kazamiakis,

Iatridi

et al. 2024

Polymers

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In this work, comb homopolymers as well as comb-type copolymers of thermo-responsive oligo(ethylene glycol methyl ether methacrylate)s, OEGMAs, with various chain lengths (DEGMA, PEGMA500, and PEGMA950 containing 2, 9, or 19 repeating ethylene glycol units, respectively) were synthesized through free radical (co)polymerization. For the copolymers, either the functional hydrophobic glycidyl methacrylate (GMA) or the inert hydrophilic N,N-dimethylacrylamide (DMAM) were selected as comonomers. The self-assembly and thermo-responsive behavior of the products was investigated through Nile Red fluorescence probing, turbidimetry, and dynamic light scattering (DLS). Interestingly, it was found that all OEGMA-based homopolymers exhibit a tendency to self-organize in aqueous media, in addition to thermo-responsiveness. The critical aggregation concentration (CAC) increases with the number of repeating ethylene oxide units in the OEGMA macromonomers (CAC was found to be 0.003, 0.01, and 0.03% w/v for the homopolymers PDEGMA, PPEGMA500, and PPEGMA950, respectively). Moreover, the CAC of the copolymers in aqueous media is highly affected by the incorporation of hydrophobic GMA or hydrophilic DMAM units, leading to lower or higher values, respectively. Thus, the CAC decreases down to 0.003% w/v for the GMA-richest copolymer of PEGMA950, whereas CAC increases up to 0.01% w/v for the DMAM-richest copolymer of DEGMA. Turbidimetry and DLS studies proved that the thermo-sensitivity of the polymers is governed by several parameters such as the number of repeating ethylene glycol groups in the side chains of the OEGMAs, the molar percentage of the hydrophobic or hydrophilic comonomers, along with the addition of salts in the aqueous polymer solutions. Thus, the cloud point of the homopolymer PDEGMA was found at 23 °C and it increases to 33.5 °C for the DMAM-richest copolymer of DEGMA. Lastly, the formation of a hydrogel upon heating aqueous mixtures of the GMA-comprising copolymers with silica nanoparticles overnight is strong evidence of the functional character of these polymers.

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“…Except for the usual advantages of inorganic nanoparticles, nano-silica is low-cost and easily functionalized [ 35 , 36 , 37 ]. On the other hand, block co-polymerization is a useful method for getting functional co-polymers since block co-polymer has the superiorities of a clear chemical structure and narrow molecular weight distribution [ 38 , 39 , 40 ].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Removal of Cr(VI) and Phenol from Water Using Silica-di-Block Polymer Hybrids: Adsorption Kinetics and Thermodynamics

Yang

Gong

et al. 2022

Polymers

Self Cite

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Heavy metal ions and organic pollutants often coexist in industrial effluents. In this work, silica-di-block polymer hybrids (SiO2-g-PBA-b-PDMAEMA) with two ratios (SiO2/BA/DMAEMA = 1/50/250 and 1/60/240) were designed and prepared for the simultaneous removal of Cr(VI) and phenol via a surface-initiated atom-transfer radical polymerization process using butyl methacrylate (BA) as a hydrophobic monomer and 2-(Dimethylamino)ethylmethacrylate (DMAEMA) as a hydrophilic monomer. The removal efficiency of Cr(VI) and phenol by the hybrids reached 88.25% and 88.17%, respectively. The sample with a larger proportion of hydrophilic PDMAEMA showed better adsorption of Cr(VI), and the sample with a larger proportion of hydrophobic PBA showed better adsorption of phenol. In binary systems, the presence of Cr(VI) inhibited the adsorption of phenol, yet the presence of phenol had a negligible effect on the adsorption of Cr(VI). Kinetics studies showed that the adsorption of Cr(VI) and phenol fitted the pseudo-second-order model well. Thermodynamic studies showed that the adsorption behavior of Cr(VI) and phenol were better described by the Langmuir adsorption isotherm equation, and the adsorption of Cr(VI) and phenol were all spontaneous adsorptions driven by enthalpy. The adsorbent still possessed good adsorption capacity for Cr(VI) and phenol after six adsorption–desorption cycles. These findings show that SiO2-g-PBA-b-PDMAEMA hybrids represent a satisfying adsorption material for the simultaneous removal of heavy metal ions and organic pollutants.

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Preparation and Performance of Silica-di-Block Polymer Hybrids for BSA-Resistance Coatings

Cited by 6 publications

References 45 publications

Grafting an Amphiphilic Block Copolymer to Magnetic-Functionalized Carbon Nanotubes and Their Nanochannels in Membranes

Grafting an Amphiphilic Block Copolymer to Magnetic-Functionalized Carbon Nanotubes and Their Nanochannels in Membranes

Controlled Amphiphilicity and Thermo-Responsiveness of Functional Copolymers Based on Oligo(Ethylene Glycol) Methyl Ether Methacrylates

Simultaneous Removal of Cr(VI) and Phenol from Water Using Silica-di-Block Polymer Hybrids: Adsorption Kinetics and Thermodynamics

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