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hydrophilization of Polyurethane Foam Carriers in MBBR with Hyperbranched Polymeric Diazonium Salts

Chemical Research in Chinese Universities 2018年第5期34卷 844-848页

作者： LI Shang WANG Jilei TUO Xinlin HE Yaning Key Laboratory of Advanced Materials Ministry of Education Department of Chemical Engineering Tsinghua University Beijing 100084 P. R. China

In recent years, there has been a considerable research interest in moving-bed biofilm reactor（MBBR） for its efficiency and stability. This work proposes a new way to modify the hydrophilicity of polyurethane foam（PU） carriers via the layer-by-layer self-assembly of hyperbranched polymeric diazonium salt（M-HB-DAS） and poly（sodium-p-styrenesulfonate）（PSS）. Modified carriers showed very good adsorption for microbes according to the results of scanning electron microscope（SEM）. Biochemical experiments on wastewater treatment confirm that the modified PU carriers can improve the removal rate of chemical oxygen demand（COD）.

关键词： Hyperbranched Diazonium salt Layer-by-layer self-assembly hydrophilization Azo polymer

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Size-controlled synthesis of Fe3O4 and Fe3O4@SiO2 nanoparticles and their superparamagnetic properties tailoring

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Progress in Natural Science:Materials International 2023年第1期33卷 116-119页

作者： Muhammad Sajid Sidra Shuja Hongpan Rong Jiatao Zhang Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications School of Materials Science & Engineering Beijing Institute of Technology Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering School of Chemistry and Chemical Engineering Institute of Engineering Medicine Beijing Institute of Technology

Superparamagnetic properties and fine-tuning of colloidal Fe3O4nanoparticles are important for their widespread biomedical applications. Herein, colloidal Fe3O4nanoparticles(NPs) of different sizes(8–20 nm) were prepared,and their hydrophilization with SiO2shell coating to be Fe3O4@SiO2core-shell had been realized *** size of Fe3O4NPs was controlled by different heating rates. Transmission electron microscope(TEM), powder X-ray diffractometry(XRD), and vibrating sample magnetometer(VSM) were performed to examine the morphology, crystallinity, and magnetic properties of the prepared Fe3O4and Fe3O4@SiO2core-shell NPs,respectively. In addition, high resolution transmission electron microscope(HRTEM) results suggested that Fe3O4NPs had well crystallization. Enabled by such, their superparamagnetic properties can be fine-tuned accordingly and cater to their potential applications.

关键词： Fe 3 O 4 nanoparticles Fe 3 O 4 @SiO 2 hydrophilization Superparamagnetic Core-shell Aqueous inverse microemulsion

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Surface Modification of PEEK and Its Osteoconductivity and Anti-Inflammatory Properties

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Journal of Biomaterials and Nanobiotechnology 2018年第3期9卷 233-243页

作者： Kensuke Kuroda Kenta Igarashi Hiroyasu Kanetaka Masazumi Okido Institute of Materials and Systems for Sustainability Nagoya University Nagoya Japan Department of Materials Science and Engineering Graduate School of Engineering Nagoya University Nagoya Japan Liaison Center for Innovative Dentistry Graduate School of Dentistry Tohoku University Sendai Japan

Polyetheretherketone (PEEK) is known as one of the “super-engineering plastics” and is used as an intervertebral disk spacer in the body. PEEK has a hydrophobic surface (water contact angle (WCA) > 80°) and high chemical resistance, and it is thus difficult to perform any surface treatment, such as hydrophilization. In this study, we aimed to form a hydrophilic surface on PEEK without coating layers by using hydroprocessing (aqueous solution processing), and we examined the osteoconductivity and anti-inflammatory properties of surface-treated PEEK in vivo compared with Ti implants. The WCA value of PEEK reached ~20° using a combination of immersion in a solution of >16.2 M H2SO4 and ultraviolet irradiation (172 nm). In in vivo testing, the hydrophilization of PEEK by surface modification without a coating layer improved the osteoconductivity and anti-inflammatory properties. The relationship between the bone-implant contact ratio and the WCA values of the surface-modified PEEK agreed well with that of the surface-treated Ti.

关键词： Polyetheretherketone hydrophilization Protein Adsorption Osteoconductivity Inflammatory

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