Preparation and dye filtration property of electrospun polyhydroxybutyrate–calcium alginate/carbon nanotubes composite nanofibrous filtration membrane

Guo, Jie; Zhang, Qing; Cai, Zengxuan; Zhao, Kongyin

doi:10.1016/j.seppur.2016.01.036

Cited by 145 publications

(46 citation statements)

References 33 publications

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“…One desirable solution to these remaining challenges is to construct the selective layers of TFC NFMs with natural materials, especially materials abundant in nature that can be obtained with low energy cost . For example, natural polysaccharides and their derivatives have been the most widely used for fabricating the selective layers through solution or powder coating methods followed by cross‐linking . However, the as‐prepared TFC NFMs suffer from relatively low salt rejection and much lower water permeation flux than those fabricated through interfacial polymerization of diamines and trimesoyl chloride .…”

Section: Introductionmentioning

confidence: 99%

“…[18] For example, natural polysaccharides and their derivatives have been the most widely used for fabricating the selectivel ayers through solutiono rp owder coating methods followed by cross-linking. [18][19][20][21][22] However,t he as-prepared TFC NFMs suffer from relatively low salt rejection and much lower water permeation flux than those fabricated through interfacialp olymerization of diamines and trimesoyl chloride. [1] We suggest that one of the main problemsi st he relativelyt hick selective layers (more than 100 nm when dry, but much thicker after swelling during filtration), owing to the lack of properm ethods to construct thin andd efect-free coatings on the support substrates.…”

Section: Introductionmentioning

confidence: 99%

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Ultrathin Alginate Coatings as Selective Layers for Nanofiltration Membranes with High Performance

Zhang

Zhong

et al. 2017

ChemSusChem

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It is highly desirable to develop environmentally friendly processes for fabricating thin-film composite (TFC) nanofiltration membranes (NFMs) from natural materials. However, the nanofiltration performance of such TFC NFMs is not satisfactory for practical applications owing to the lack of efficient methods for constructing ultrathin, uniform, stable coatings as selective layers. In this study, a contra-diffusion strategy is used to fabricate TFC NFMs with ultrathin cross-linked alginate coatings as selective layers without the use of any organic solvents. The as-prepared NFMs show a water permeation flux that is nearly one order of magnitude higher than that of other alginate-based TFC NFMs with similar salt rejection, and represents the best performance among all TFC NFMs from natural materials. These NFMs also demonstrate excellent mono-/divalent ion selectivity, as well as good long-term operation stability and antifouling properties. Furthermore, this strategy maximizes the reactant usage rate, minimizes the waste discharge and provides new insight into environmentally friendly fabrication of TFC NFMs.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultrathin Alginate Coatings as Selective Layers for Nanofiltration Membranes with High Performance

Zhang

Zhong

et al. 2017

ChemSusChem

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“…To achieve greater flexibility, a plasticizer can be added to increase the free volume between the polymer chains 21,22 or a copolymer of PHB, for example, polyhydroxybutyrate-cohydroxyvalerate (PHBV) can be used [23][24][25] . Another possibility to improve the performance of PHB is to use natural or synthetic fibers as reinforcing the polymeric matrix obtaining a composite [26][27][28] .…”

Section: Introductionmentioning

confidence: 99%

Polyhydroxybutyrate Composites with Random Mats of Sisal and Coconut Fibers

et al. 2016

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Biodegradable polymeric composites using natural fibers have been investigated aiming to mitigate environmental impacts. In this paper, polyhydroxybutyrate (PHB) composites obtained using random mats of sisal and coconut fibers by compression molding in a hydraulic press, and the fiber content varied between 10% and 15% relative to the weight of the polymer. Thermal analyses were performed such as Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA). Flexural and tensile tests were performed before and after conditioning in climate chamber with temperature and moisture. The results of thermal analysis show that the thermal stability of the materials remained, both PHB without fiber as for composites with natural fibers mats. The results of mechanical tests indicated that the PHB without fibers and composites showed similar flexural strength values, while the results of the tensile test PHB without fibers showed resistance to higher tensile composite.

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“…Using this membrane, the glucose could selectively separate from mixed sugars solution by static diffusion, without driving pressure (Kashima and Imai, 2017). Moreover, the CaAlg composite hydrogel nano-filtration membranes performed high flux and rejection rate for small organic molecules in wastewater were reported (Guo et al, 2016, Jie et al, 2015.…”

Section: Introductionmentioning

confidence: 99%

Preparation of free‐standing chitosan membranes for Chlorella vulgaris harvest and examination on suppression of algae‐fouling properties

Wang

Liu

et al. 2018

Water & Environment J

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Free‐standing chitosan membranes were prepared using genipin as crosslinker, using several molecular weights of polyethylene glycol (PEG) as a void‐forming agent. The membrane surface formation and chitosan polymer chain crosslinking were confirmed through SEM and FTIR, respectively. The water flux was remarkably increased with increasing molecular weight of PEG employed in preparation of composite chitosan membrane (J∝[PEG(MW)]0.85), it appeared over 6000 Da of PEG. During Chlorella vulgaris harvest using chitosan membranes, focus was made on algae‐fouling caused by the deposition of cells and extracellular organic matter, and it was found that membranes employing lower molecular weight of PEG (under 10000 Da) had been maintaining the high flux recovery after alternating filtration cycles, in addition to PEG20000 containing membrane. The chitosan membrane prepared with lower molecular weight of PEG exhibited better suppression of algae‐fouling properties. The Chlorella vulgaris harvesting results indicated that cell rejection rate reached above 98%.

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Preparation and dye filtration property of electrospun polyhydroxybutyrate–calcium alginate/carbon nanotubes composite nanofibrous filtration membrane

Cited by 145 publications

References 33 publications

Ultrathin Alginate Coatings as Selective Layers for Nanofiltration Membranes with High Performance

Ultrathin Alginate Coatings as Selective Layers for Nanofiltration Membranes with High Performance

Polyhydroxybutyrate Composites with Random Mats of Sisal and Coconut Fibers

Preparation of free‐standing chitosan membranes for Chlorella vulgaris harvest and examination on suppression of algae‐fouling properties

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