生物质两性吸附剂的合成及对Cu（II）和Cr（VI）的去除

本研究以麦草为原料,以三乙胺和一氯乙酸分别为氨基和羧基官能团接枝反应剂,制备秸秆基两性吸附剂。并以产品对Cu（II）和Cr（VI）的去除效果为指标,分别考察了合成过程中单一影响因素,并结合正交实验得出最佳改性条件。实验结果表明,一氯乙酸投加量是影响两性秸秆改性效果的主要因素,温度的影响最小;最佳改性条件为：当固定阳离子型麦草秸秆投加量为6.69g时,氢氧化钠投加量、一氯乙酸投加量、反应温度、反应时间分别为5mL,3.402g,60℃,2.5h。该吸附剂对Cu(II)和Cr(VI)的最大吸附量可达到90.9 mg•g-1 和241.1 mg•g-1。     

Synthesis of Fullerene-end Functionalized Poly（methyl methacrylate） via Reverse Atom Transfer Radical Polymerization

The use of the reverse atom transfer radical polymerization （RATRP） to end-functionalize poly（methyl methacrylate） （PMMA） with fullerenes, e.g. C60 and C70 was described in this paper. The Cl-terrninated PMMA was prepared via RATRP with designed molecular weight and narrow molecular weight distributions, and then directly used to react with fullerenes to produce C60（C70） terminated PMMA polymers in the presence of CuBr/Cu/bipy or FeCl2/bipy catalysts. The resultant polymers exhibit good solubility in some common organic solvents, e.g. THF, CHCl3 and toluene, and were well structurally characterized by a variety of physical techniques.