Developing eco-friendly products to replace fossil-based ones which are difficult to degrade and pollute survival environment, is of great significance for human health and environmental protection. Here, the preparation of green polyvinyl alcohol/polylactic acid (PVA/PLA) materials has been achieved for the first time using a simple and effective strategy. Interestingly, after the composite of PVA with PLA, PLA can remarkedly enhance tensile strength, elongation at break, biocompatibility and thermostability of the PVA/PLA material. Moreover, the material is biodegradable in natural environment. At the same time, scanning electron micrograph (SEM), X-ray diffraction (XRD) and infrared spectra (IR) techniques are employed to systematically study the effects of PVA/PLA mass ratio on the morphology, crystallinity and chemical structure of the PVA/PLA material and possible interaction between PVA and PLA. It is expected that this study can provide a new insight into the fabrication of green PVA-based products with high performance and practical application.
Ecofriendly adsorbent materials for the rapid and efficient removal of pollutant dyes are highly desired on account of concerns about environmental pollution and human health. Herein, novel magnetic HC/Fe3O4 spherical materials have been constructed via crosslinking hydroxyethyl cellulose (HC) by poly(ethylene glycol) diglycidyl ether (PGDE) followed by the introduce of magnetic Fe3O4 by a facile and effective strategy developed in this work. The morphology, structure and magnetic behavior of the spherical materials have been systematically investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR) and vibrating sample magnetometer (VSM) techniques. Further, the spherical materials were utilized to remove congo red (CR-SO3Na) from aqueous solution under varying adsorption conditions. Meanwhile, the adsorption kinetics, thermodynamics and isothermics have been achieved to explore the adsorption process and possible adsorption mechanism of CR-SO3Na by the spherical materials. The materials show not only an efficient capacity of CR-SO3Na removal from aqueous solution, but also a sufficient magnetic property of the recovery of the materials from aqueous solution after adsorption. The spherical materials have great potential to be used as efficient adsorbents for the removal of dye-containing effluent.
Ecofriendly adsorbent materials for the rapid and efficient removal of pollutant dyes are highly desired on account of concerns about environmental pollution and human health. Herein, novel magnetic HC/Fe3O4 spherical materials have been constructed via crosslinking hydroxyethyl cellulose (HC) by poly(ethylene glycol) diglycidyl ether (PGDE) followed by the introduce of magnetic Fe3O4 by a facile and effective strategy developed in this work. The morphology, structure and magnetic behavior of the spherical materials have been systematically investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR) and vibrating sample magnetometer (VSM) techniques. Further, the spherical materials were utilized to remove congo red (CR-SO3Na) from aqueous solution under varying adsorption conditions. Meanwhile, the adsorption kinetics, thermodynamics and isothermics have been achieved to explore the adsorption process and possible adsorption mechanism of CR-SO3Na by the spherical materials. The materials show not only an efficient capacity of CR-SO3Na removal from aqueous solution, but also a sufficient magnetic property of the recovery of the materials from aqueous solution after adsorption. The spherical materials have great potential to be used as efficient adsorbents for the removal of dye-containing effluent.
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