Fabrication of temperature-responsive ZrO2 tubular membranes, grafted with poly (N-isopropylacrylamide) brush chains, for protein removal and easy cleaning

Zhou, Shouyong; Xue, Ailian; Zhang, Yan; Li, Meisheng; Wang, Jingang; Zhao, Yijiang; Xing, Weihong

doi:10.1016/j.memsci.2013.09.011

Cited by 51 publications

(40 citation statements)

References 55 publications

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“…Different inorganic nanoparticles were introduced into the membrane structure to alleviate membrane fouling. In this regard, TiO 2 , SiO 2 , , ZnO , zirconia , , iron oxide , and alumina , illustrate the point as widely employed metal oxide nanoparticles offering antifouling characteristics to the membranes.…”

Section: Introductionmentioning

confidence: 95%

Surface Modification of Polysulfone Membranes Using Poly(Acrylic Acid)‐Decorated Alumina Nanoparticles

2017

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Alumina nanoparticles were decorated with poly(acrylic acid) (PAA) as a hydrophilic polymer by thermal polymerization of acrylic acid in the presence of alumina nanoparticles. The obtained PAA-decorated alumina (PAA-d-Al) nanoparticles were embedded in the polysulfone membrane matrix via nanofiller dispersion in the casting solution. The prepared membranes were characterized by porosity and water contact angle measurements, scanning electron and atomic force microscopy, and fouling tests using whey proteins. The presence of nanoparticles had significant effects on the membrane hydrophilicity and surface softness, resulting in fouling mitigation and flux recovery enhancement compared with the virgin polysulfone membrane. Moreover, the prepared membrane embedded with 0.25 wt % of PAA-d-Al nanofillers showed a remarkable durability and reusability during the filtration tests.

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Section: Introductionmentioning

confidence: 95%

Surface Modification of Polysulfone Membranes Using Poly(Acrylic Acid)‐Decorated Alumina Nanoparticles

2017

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“…Specifically,c haracteristic peaks at 1548, 3280 and 1662 cm À1 are assigned to NÀHb ending and stretching, and C=Os tretching vibrationm odes of PNIPAM, respectively. [15] X-ray photoelectrons pectroscopy (XPS) further proved the chemical change as ar esult of PNIPAM modification on TPI surfaces. The high-resolution N1s spectra of TPI slices under different treatments are compared in Figure 1g.F or raw TPI slice, the weak peak around 398 eV is attributed to the physically adsorbed nitrogen.…”

mentioning

confidence: 94%

Radical Cation Initiated Surface Polymerization on Photothermal Rubber for Smart Antifouling Coatings

Lian

Wang

et al. 2018

Chemistry A European J

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Biofouling on surfaces of various materials has attracted considerable attention in biomedical and marine industries. Surface grafting based on covalent surface‐initiated polymerization offers a popular route to address this problem by providing diverse robust polymer coatings capable of preventing the biofouling in complex environments. However, the existing methods for synthesizing polymer coatings are complicated and rigorous, or require special catalysts, greatly limiting their practical applications. In this work, a radical‐cation‐based surface‐initiated polymerization protocol to graft the surface of darkened trans‐polyisoprene (TPI) rubber with a thermo‐responsive smart polymer, poly(N‐isopropylacrylamide) (PNIPAM), through a simple iodine doping process is reported. A series of characterizations were performed to provide adequate evidence to confirm the successful grafting. Combining the thermal sensitivity of PNIPAM with the photothermal conversion ability of the darkened rubber, efficient bacteria‐killing and antifouling capabilities were successfully achieved as a result of temperature‐controlled iodine release and switchable amphiphilicity of PNIPAM.

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“…For example, grafting PNIPAM chains from the surface of the membrane can promote the release of adsorbed species by cycling the temperature above and below its LCST. This leads to a reversible change in the conformation of the grafted nanostructure which could lead to the release of adsorbed species [8][9][10]. In recent studies, Zhang et al [11], Wu et al [12], and Wang et al [13] exploited the changes in conformation of the grafted nanostructure above and below the LCST in order to develop membranes suitable for oil-water separations.…”

Section: Introductionmentioning

confidence: 99%

Oil Deposition on Polymer Brush-Coated NF Membranes

Mark

Ramon

et al. 2019

Membranes

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Membrane-based processes are attractive for treating oily wastewaters. However, membrane fouling due to the deposition of oil droplets on the membrane surface compromises performance. Here, real-time observation of the deposition of oil droplets by direct confocal microscopy was conducted. Experiments were conducted in dead-end and crossflow modes. Base NF 270 nanofiltration membranes as well as membranes modified by grafting poly(N-isopropylacrylamide) chains from the membrane surface using atom transfer radical polymerization were investigated. By using feed streams containing low and high NaCl concentrations, the grafted polymer chains could be induced to switch conformation from a hydrated to a dehydrated state, as the lower critical solution temperature for the grafted polymer chains moved above and below the room temperature, respectively. For the modified membrane, it was shown that switching conformation of the grafted polymer chains led to the partial release of adsorbed oil. The results also indicate that, unlike particles such as polystyrene beads, adsorption of oil droplets can lead to coalescence of the adsorbed oil droplets on the membrane surface. The results provide further evidence of the importance of membrane properties, feed solution characteristics, and operating mode and conditions on membrane fouling.

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Fabrication of temperature-responsive ZrO2 tubular membranes, grafted with poly (N-isopropylacrylamide) brush chains, for protein removal and easy cleaning

Cited by 51 publications

References 55 publications

Surface Modification of Polysulfone Membranes Using Poly(Acrylic Acid)‐Decorated Alumina Nanoparticles

Surface Modification of Polysulfone Membranes Using Poly(Acrylic Acid)‐Decorated Alumina Nanoparticles

Radical Cation Initiated Surface Polymerization on Photothermal Rubber for Smart Antifouling Coatings

Oil Deposition on Polymer Brush-Coated NF Membranes

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