Partially reduced graphene oxide and chitosan nanohybrid membranes for selective retention of divalent cations

Wei, Yangyang; Wang, Jian; Li, Hao; Zhao, Man; Zhang, Huifeng; Guan, Yipeng; Huang, Hai; Mi, Baoxia

doi:10.1039/c8ra01916a

Cited by 24 publications

(6 citation statements)

References 38 publications

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“…Chitosan is a natural polymer derived from the deacetylation of chitin, and is considered the second most common natural polysaccharide. [1][2][3] Due to its low cost, easy lm-forming capacity, environmental friendliness, alkali stability, biodegradability, excellent mechanical properties and thermal stability, it is very valuable in the preparation of membranes, and has attracted great research interest. [4][5][6][7] Many studies have reported that chitosan has an excellent ability to form microspheres, membranes and bers, which gives it a signicant advantage over other absorbable membrane materials in the design of packaging structures.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of chitosan membranes

et al. 2018

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The present study investigates a new solvent system for the dissolution of chitosan and a new method for preparing chitosan membranes. First, aqueous tartaric acid was used to pretreat chitosan. Then, the chitosan was precipitated with ethanol or other regenerating agents, and 1.5 mL of 1-ethyl-3methylimidazolium acetate ([EMIM]AC) was added to obtain translucent suspensions. The chitosan membranes were prepared by casting the suspensions on glass plates and allowing solvent evaporation.The structure and properties of the films were investigated by SEM, FT-IR, XRD and TGA. Also, the mechanical properties, as well as physical and chemical characteristics, of the chitosan films were evaluated. The results indicated that the optimum dissolution time was 10 min and the most suitable drying temperature was 60 C. The thus-prepared film was moderately thick (about 0.02 mm) and had a smooth surface, without curling. The chitosan film prepared by ethanol regeneration had a tensile strength of up to 24 MPa, a minimum swelling degree of 78%, and a water vapor transmission rate of 270 g m À2 d À1 without the addition of plasticizer. View Article Online a Calculated from the Mark-Houwink equation: [h] ¼ KM a The molecular weight of chitosan M ¼ 398300.This journal is

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Section: Introductionmentioning

confidence: 99%

Preparation and characterization of chitosan membranes

et al. 2018

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“…The intense peak at a 230 nm wavelength is the characteristic peak of GO, which is related to the π–π* transition of C=C [ 28 ]. The small shoulder at a 304 nm wavelength relates to the n–π* transition of C=O [ 29 ]. After the addition of CMC, the peak at 230 nm shifted to 260 nm, suggesting the successful reduction of GO.…”

Section: Resultsmentioning

confidence: 99%

Reduced Graphene Oxide-Based Double Network Polymeric Hydrogels for Pressure and Temperature Sensing

Liu

Zhang

Wei

et al. 2018

Sensors

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We demonstrate the fabrication of novel reduced graphene oxide (rGO)-based double network (DN) hydrogels through the polymerization of poly(N-isopropylacrylamide) (PNIPAm) and carboxymethyl chitosan (CMC). The facile synthesis of DN hydrogels includes the reduction of graphene oxide (GO) by CMC, and the subsequent polymerization of PNIPAm. The presence of rGO in the fabricated PNIPAm/CMC/rGO DN hydrogels enhances the compressibility and flexibility of hydrogels with respect to pure PNIPAm hydrogels, and they exhibit favorable thermoresponsivity, compressibility, and conductivity. The created hydrogels can be continuously cyclically compressed and have excellent bending properties. Furthermore, it was found that the hydrogels are pressure- and temperature-sensitive, and can be applied to the design of both pressure and temperature sensors to detect mechanical deformation and to measure temperature. Our preliminary results suggest that these rGO-based DN hydrogels exhibit a high potential for the fabrication of soft robotics and artificially intelligent skin-like devices.

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“…47 To achieve selective retention of divalent cations, a reduced GO and nanohybrid membrane was developed. 48 A new method for synthesizing composites by direct chemical exfoliation of graphite and CHI dissolved in acetic or aspartic acid was reported. 49…”

Section: Introductionmentioning

confidence: 99%

An electrochemical sensor for flubendiamide insecticide analysis based on chitosan/reduced graphene oxide

et al. 2023

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Partially reduced graphene oxide and chitosan nanohybrid membranes for selective retention of divalent cations

Abstract: Partially reduced graphene oxide and chitosan nanohybrid membranes were fabricated to exhibit selective retention of divalent cations.

Cited by 24 publications

References 38 publications

Preparation and characterization of chitosan membranes

Preparation and characterization of chitosan membranes

Reduced Graphene Oxide-Based Double Network Polymeric Hydrogels for Pressure and Temperature Sensing

An electrochemical sensor for flubendiamide insecticide analysis based on chitosan/reduced graphene oxide

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