Electrosprayed porous microspheres for the removal of endocrine disruptors

Zhang, Quanchao; Zhang, Yijia; Wei, Qiang; Wang, Xiaojun; Liu, Jing; Yang, Jie; Zhao, Changsheng

doi:10.1002/app.33478

Cited by 16 publications

(11 citation statements)

References 22 publications

(19 reference statements)

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“…fabricated various structure of PES microspheres for the adsorption of BPA, and Wei et al . employed composite ultrafine fibers of PES/PEG to adsorb BPA . Based on the reports mentioned above, PES has the potential to be used as efficient adsorbent for the removal of BPA.…”

Section: Introductionmentioning

confidence: 99%

Preparation of polyethersulfone/sulfonated polyethersulfonephenylethane microspheres and its application for the adsorption of bisphenol A

Qiu

Peng

Wei

et al. 2015

J of Applied Polymer Sci

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A novel kind of sulfonated polyethersulfonephenylethane (SPESPE) was successfully synthesized firstly in this work. Then the SPESPE was introduced in polyethersulfone (PES) microspheres prepared by the electrospraying technique. The microspheres were applied to adsorbing bisphenol A (BPA) from its aqueous solution. Compared with the PES microspheres, the adsorption capacity of PES/SPESPE microspheres for BPA was increased significantly. Furthermore, the adsorption capacity of PES/SPESPE microspheres was enhanced by increasing the amounts of SPESPE in the microspheres. The pH of solution had influence on the adsorption capacity of PES/SPESPE microspheres. The kinetic data of adsorption were found to follow pseudo-second-order model. The Freundlich isotherm model was suitable to describe the equilibrium adsorption data. The microspheres also showed excellent regeneration and reuse ability. These results indicated that the PES/SPESPE microspheres have the potential to be used in environmental application.

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Section: Introductionmentioning

confidence: 99%

Preparation of polyethersulfone/sulfonated polyethersulfonephenylethane microspheres and its application for the adsorption of bisphenol A

Qiu

Peng

Wei

et al. 2015

J of Applied Polymer Sci

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“…Possible mechanism for the formation of porous structure For porous electrospun fibers, there are two possible mechanisms related to the formation of porous structure on the fiber; one is thermally induced phase separation mechanism [15][16][17][18][19][20]28] and the other is breath figure mechanism [20,[29][30][31]. In this study, the water-soluble salt and the humid air atmosphere were considered as the key roles for the formation of porous structure.…”

Section: Resultsmentioning

confidence: 99%

Porous ultrafine fibers via a salt-induced electrospinning method

Zhang

Liu

et al. 2012

Colloid Polym Sci

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A salt-induced electrospinning method to produce porous polymer ultrafine fibers was reported in this work. Scanning electron microscopy, energy dispersive spectrometer, and BET surface area measurement were employed to evaluate the morphology, the element distribution, and the surface area of fibers, respectively. According to the investigation result, pores on the fiber were induced by water-soluble salt during electrospinning process in a humid spinning environment. There was no porous structure on the fiber surface when water-insoluble salt was used in a wet electrospinning environment or when water-soluble salt was used in a dry electrospinning environment. Compared with pure fibers, the average surface area of fibers containing salt increased significantly due to the porous structure. The possible mechanism of the porous structure induced by salt was proposed. Water-solubility salt and humid environment were considered as the key roles in the formation of porous structure. This method provided a new way to form porous structure during electrospinning.

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“…It was not possible to have straightforward evidences of the morphology at the interior of the microspheres. Unfortunately, application of FIB-SEM led to the melting of the microparticles, while the application of alternative methodologies, like the one proposed by Wang et al 31 and Zhang et al, 32 was not feasible because it requires the sample to be dissolved in water (i.e. both U-PE44 and PE44-GA microspheres tend to aggregate when interacting in aqueous solutions).…”

Section: Resultsmentioning

confidence: 99%

Electrospray loading and release of hydrophobic gramicidin in polyester microparticles

et al. 2016

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Gramicidin (GA), a very hydrophobic pentadecapeptide with important biological activities (i.e. in addition to its well-known antimicrobial and antibiotic activities, GA has been recently identified as a potent therapeutic agent against different carcinomas), has been loaded by electrospraying in poly(tetramethylene succinate) (PE44), a biodegradable and biocompatible aliphatic polyester. Microspheres (average diameter: 5.0 +/- 0.7 mm) were successfully obtained from the mixture of GA and PE44 solutions in ethanol and chloroform, respectively. The loading of the peptide, which has been proved by FTIR and X-ray photoelectron spectroscopies, essentially occurred at the surface of the microspheres, as was reflected by scanning electron microscopy micrographs and atomic force microscopy phase images. In spite of this, the thermal stability of the polyester matrix remained essentially unaltered, even though the wettability decreased. The release of GA in phosphate buffer saline (PBS) was limited by the very low solubility of the peptide in aqueous solution, a fast burst effect followed by the establishment of equilibrium after 5 days of being observed in this hydrophilic environment. The release behaviour was very different when the hydrophilicity of the medium was reduced by adding ethanol. In this case, a very fast but sustained release was identified during the first few hours. On the other hand, biological tests have demonstrated that GA retains its antimicrobial activity after loading and does not alter the biocompatibility of PE44. Our results prove that, despite its hydrophobicity and relatively large number of residues, the loading of GA in a polymeric matrix represents an alternative strategy for the release of this versatile peptide in cancer therapy.Peer ReviewedPostprint (author's final draft

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Electrosprayed porous microspheres for the removal of endocrine disruptors

Cited by 16 publications

References 22 publications

Preparation of polyethersulfone/sulfonated polyethersulfonephenylethane microspheres and its application for the adsorption of bisphenol A

Preparation of polyethersulfone/sulfonated polyethersulfonephenylethane microspheres and its application for the adsorption of bisphenol A

Porous ultrafine fibers via a salt-induced electrospinning method

Electrospray loading and release of hydrophobic gramicidin in polyester microparticles

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