An infrared spectroscopy study of PES PVP blend and PES-g-PVP copolymer

Huang, Jianxi; Yang, Haijun; Chen, Min; Ji, Te; Hou, Zhufeng; Wu, Minghong

doi:10.1016/j.polymertesting.2017.02.005

Cited by 48 publications

(27 citation statements)

References 29 publications

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“…As shown in Figure (e), the characteristic peaks at 1321 and 1298 cm −1 resulting from the asymmetric OSO stretching of the sulfone groups and 1583, 1485, 3090, and 710 cm −1 associating with aromatic CC stretching and vibration absorptions appear in PES and PES/PDA microfibers . Meanwhile, the peak at 3366 cm −1 assigning to NH bonds in the heterocycle of PDA only arises in PES/PDA microfibers. The chemical changes also reveal the PDA coats on the surface of the PES/PDA microfibers.…”

Section: Resultsmentioning

confidence: 97%

Improvements on electrical conductivity of the electrospun microfibers using the silver nanoparticles

Wei

Qiu

Wang

et al. 2019

J of Applied Polymer Sci

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Conductive electrospun polymer fibers have attracted a great deal of interest in recent years. This study describes the preparation of electrically conductive microfibers composed of polyethersulfone/polydopamine/silver nanoparticles (PES/PDA/Ag NPs). Ag NPs acted as conductive centers, while hydroxyl‐ and amino‐rich functional groups and excellent adhesion properties of PDA served to connect the Ag NPs and PES microfibers. Fourier transform infrared spectroscopy and scanning electron microscopy (SEM) showed that PDA was firmly adhered to PES microfibers. PES/PDA microfibers absorbed considerable amounts of silver ion from AgNO3 solution, resulting in Ag NPs. X‐ray diffraction, X‐ray photoelectron spectroscopy, and SEM data represented the successful formation of PES/PDA/Ag NPs microfibers. Microfibers with optimal conductivity were obtained using a solution of 2% AgNO3 at pH 9 at 50 °C for 45 min. The electrical resistivity of our PES/PDA/Ag NPs microfibers was only 202 Ω/cm, much lower than that of regular PES microfibers (2.1 × 109 Ω/cm). These results show that the PES/PDA/Ag NPs microfibers are suitable for use as conductive polymer fibers in electromagnetic shielding, and conductivity‐sensing applications, and in flexible electronic devices and biosensors. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48788.

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Section: Resultsmentioning

confidence: 97%

Improvements on electrical conductivity of the electrospun microfibers using the silver nanoparticles

Wei

Qiu

Wang

et al. 2019

J of Applied Polymer Sci

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“…In these spectra, the peaks at 1578, 1487, and 1407 cm –1 correspond to the stretching vibrations of the benzene rings. 36 The peaks located at 1324 and 1300 cm –1 are attributed to the asymmetric stretching vibrations of the sulfone group. Clearly, the peaks at 1720 cm –1 appeared in all the spectra of the graft copolymer, and their intensities increased with the monomer concentration in the grafting solution.…”

Section: Resultsmentioning

confidence: 99%

“…The results showed that the grafting of these small molecular monomers could strongly enhance the hydrophilicity of the membrane, whereas their antifouling property needed to be further improved. 35 , 36 …”

Section: Introductionmentioning

confidence: 99%

Antifouling Membranes Prepared from Polyethersulfone Grafted with Poly(ethylene glycol) Methacrylate by Radiation-Induced Copolymerization in Homogeneous Solution

et al. 2020

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To synthesize evenly grafted copolymers, gamma radiation of homogeneous solutions was employed to graft poly(ethylene glycol) methacrylate (PEGMA) onto polyethersulfone (PES). The grafting was verified by Fourier transform infrared spectroscopy, and the degrees of grafting (DGs) were determined by elementary analysis. The PES- g -polyPEGMA copolymers with different DGs were obtained by changing the monomer concentration. Membranes were cast from pristine PES, PES/PEG blends, and PES- g -polyPEGMA with different DGs, respectively, via nonsolvent-induced phase separation. Results from water contact angle measurements and scanning electron microscopy analysis indicated that increasing DGs led to PES- g -polyPEGMA membranes with increasing hydrophilicity and porousness. Filtration experimental results showed that increasing DGs without adding pore-forming agents caused PES- g -polyPEGMA membranes with higher permeability. Compared with PES/PEG membranes with analogous permeation characteristics, in which PEG is added as a pore-forming agent, PES- g -polyPEGMA membranes exhibited superior antifouling properties.

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“…PVP is a polymer that is often used as a nonionic surfactant due to its non-toxic, biocompatible and good hydrophilicility (Huang et al., 2017a). Gouthaman et al.…”

Section: Introductionmentioning

confidence: 99%

Adsorption behaviors on trace Pb²⁺ from water of biochar adsorbents from konjac starch

Peng

2020

Adsorption Science & Technology

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Biochar adsorbents used to treat different heavy metals in water are efficient and low-cost. Appropriate raw materials, excellent selectivity and detailed adsorption mechanism are of important for research on biochar adsorbents. In this work, konjac starch was dispersed in polyvinylpyrrolidone (PVP) solution to prepare different sizes hydrophilic carbon spheres (HCSs) by hydrothermal synthesis method. Adsorption kinetics of the HCSs towards Pb2+ is described perfectly by the pseudo-second-order equation. With the temperature increasing, adsorption thermodynamics are more consistent with the Freundlich model. The calculated ΔG, ΔH and ΔS shows the adsorption of the HCSs towards Pb2+ is a spontaneous, endothermic and entropy increase process. In addition, HCSs have excellent selectivity for the adsorption of Pb2+ and Cu2+. HCSs prepared from konjac starch make full use of natural biomass resources, they can be used as a potential adsorbent material in treatment on heavy metal ion from water field.

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An infrared spectroscopy study of PES PVP blend and PES-g-PVP copolymer

Cited by 48 publications

References 29 publications

Improvements on electrical conductivity of the electrospun microfibers using the silver nanoparticles

Improvements on electrical conductivity of the electrospun microfibers using the silver nanoparticles

Antifouling Membranes Prepared from Polyethersulfone Grafted with Poly(ethylene glycol) Methacrylate by Radiation-Induced Copolymerization in Homogeneous Solution

Adsorption behaviors on trace Pb²⁺ from water of biochar adsorbents from konjac starch

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An infrared spectroscopy study of PES PVP blend and PES-g-PVP copolymer

Cited by 48 publications

References 29 publications

Improvements on electrical conductivity of the electrospun microfibers using the silver nanoparticles

Improvements on electrical conductivity of the electrospun microfibers using the silver nanoparticles

Antifouling Membranes Prepared from Polyethersulfone Grafted with Poly(ethylene glycol) Methacrylate by Radiation-Induced Copolymerization in Homogeneous Solution

Adsorption behaviors on trace Pb2+ from water of biochar adsorbents from konjac starch

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Adsorption behaviors on trace Pb²⁺ from water of biochar adsorbents from konjac starch