title: Applications of a polymeric microgel template/ultrasonic degradation method: preparation of poly(sodium acrylate)/La(OH)3 nano-composites.
abstract: A polymeric microgel template/ultrasonic degradation method for the preparation of organic-inorganic nano-composites is proposed and successfully used in the preparation of poly(sodium acrylate) (PAANa) and lanthanium hydroxide nano-composites (PAANa/La(OH)(3)). The nano-composites were prepared via three steps. La(NO(3))(3) was trapped within the PAANa microgels first, and then the metal ions within the microgels were hydrolyzed by slow introduction of ammonia. Finally, the composites of the micro-particles were degraded by ultrasonic treatment. The product was characterized by thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques. The average diameter of the composites prepared in this way is about 50 nm and the size distribution of them is narrow. TGA analysis shows that the content of La(OH)(3) in the composites is about 20%.
authors.affiliation: Key Laboratory for Macromolecular Science of Shaanxi Province, School of Chemistry and Materials Science, Shaanxi Normal University, Xi'an 710062, PR China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhang
authors.forename: Yu
authors.initials: Y
authors.lastname: Fang
authors.forename: Shuyu
authors.initials: S
authors.lastname: Lin
authors.forename: Shan
authors.initials: S
authors.lastname: Wang
authors.forename: Daodao
authors.initials: D
authors.lastname: Hu
mesh_terms: D005782:Gels / Q000737:chemistry / Q000528:radiation effects; D007811:Lanthanum / Q000737:chemistry* / Q000528:radiation effects*; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods; D010316:Particle Size; D011108:Polymers / Q000737:chemistry* / Q000528:radiation effects*; D011829:Radiation Dosage; D013010:Sonication
chemical_list: D005782:Gels; D011108:Polymers; C033562:lanthanum hydroxide; D007811:Lanthanum