title: Stimuli-responsive one-dimensional copolymer nanostructures fabricated by metallogel template polymerization and their adsorption of aspirin.
abstract: pH responsive poly(N,N'-methylenebisacrylamide-co-4-vinylpyridine) (P(MBA-4VP)) one dimensional (1D) nanostructures have been prepared by metallogel template copolymerization, which was carried out in an Ag(i)-coordinated organogel with benzoyl peroxide (BPO) as the initiator. The product has been characterized using infrared spectroscopy, scanning electron microscopy and transmission electron microscopy. The experimental results reveal that the gel fiber is a crucial template for polymerization. Due to the degradation of the template in copolymerization, nanofibers of metallogel were transcribed to copolymer nanowires. The introduction of co-monomer 4-vinylpyridine (4VP) imparts to the 1D copolymer nanostructures pH sensitivity and the possible use as an adsorption material of aspirin. Adsorbed 1D copolymer nanostructures could be regenerated using proton solvent, acid medium and salt solution. In addition, silver nanoparticle loaded copolymer nanowires have been produced from the reduction of silver ions instead of template removal, where silver ions act both as the template and as the nanoparticle growth substrate.
authors.affiliation: Key Laboratory of Advanced materials of Ministry of Education of China, Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China. tanglm@tsinghua.edu.cn.
authors.forename: Xing
authors.initials: X
authors.lastname: Wen
authors.forename: Liming
authors.initials: L
authors.lastname: Tang
authors.forename: Lu
authors.initials: L
authors.lastname: Qiang
mesh_terms: D000327:Adsorption; D001241:Aspirin / Q000737:chemistry*; D005782:Gels / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D053768:Metal Nanoparticles / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D053770:Nanowires / Q000737:chemistry; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry; D012212:Rheology; D012834:Silver / Q000737:chemistry*
chemical_list: D005782:Gels; D011108:Polymers; D011725:Pyridines; D012834:Silver; C029351:4-vinylpyridine; D001241:Aspirin