The synthesis of poly(vinylphosphonic acid-co-methacrylic acid) microbeads by suspension polymerization and the characterization of their indium adsorption properties.
Poly(vinylphosphonic acid-co-methacrylic acid) microbeads were synthesized by suspension polymerization, and their indium adsorption properties were investigated. The obtained microbeads were characterized by Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM). The microbeads were wrinkled spheres, irrespective of the components, and their sizes ranged from 100 to 200 μm. The microbeads were thermally stable up to 260°C. As the vinylphosphonic acid (VPA) content was increased, the synthetic yields and ion-exchange capacities decreased and the water uptakes increased. The optimum synthetic yield, ion-exchange capacity and water uptake were obtained at a 0.5 mol ratio of VPA. In addition, the maximum adsorption predicted by the Langmuir adsorption isotherm model was greatest at a 0.5 mol ratio of VPA.
Department of Applied Chemistry and Biological Engineering, Chungnam National University, 79 Daehangno, Yuseong-gu, Daejeon 305-764, Republic of Korea.
Noh-Seok
NS
Kwak
Youngmin
Y
Baek
Taek Sung
TS
Hwang
D000327:Adsorption; D006863:Hydrogen-Ion Concentration; D007204:Indium / Q000737:chemistry*; D008689:Methacrylates / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D063065:Organophosphonates / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D014753:Vinyl Compounds / Q000737:chemistry*
D008689:Methacrylates; D063065:Organophosphonates; D011108:Polymers; D014753:Vinyl Compounds; D007204:Indium; C433467:vinylphosphonic acid; C008384:methacrylic acid