摘要
Poly(methyl methacrylate)(PMMA) brushes were synthesized from silicon wafers via surface initiated atom transfer radical polymerization(SI-ATRP).Energy disperse spectroscopy(EDS) and atomic force microscopy(AFM) confirmed that PMMA brushes were successfully prepared on the silicon wafers,and the surface became more hydrophobic according to the contact angle of 69°.It is found that CuCl/1,1,4,7,10,10-hexamethyl triethylenetetramine(HMTETA) system is more suitable than CuBr/N,N,N′,N″,N″-pentamethyl diethylenetriamine(PMDETA) system to control the free radical polymerization of MMA in solution.Nevertheless,better control on the thickness of PMMA brushes was achieved in CuBr/PMDETA than in CuCl/HMTETA due to higher activity and better reversibility of the former system.
Poly (methyl methacrylate) (PMMA) brushes were synthesized from silicon wafers via surface initiated atom transfer radical polymerization (SI-ATRP). Energy disperse spectroscopy (EDS) and atomic force microscopy (AFM) confirmed that PMMA brushes were successfully prepared on the silicon wafers, and the surface became more hydrophobic according to the contact angle of 69~. It is found that CuCI/1, 1, 4, 7, 10, 10-hexamethyl triethylenetetramine (HMTETA) system is more suitable than CuBr/N, N, N′, N″, N′″-pentamethyl diethylenetriamine (PMDETA) system to control the free radical polymerization of MMA in solution. Nevertheless, better control on the thickness of PMMA brushes was achieved in CuBr/PMDETA than in CuC1/HMTETA due to higher activity and better reversibility of the former system.
基金
Project(21376271)supported by the National Natural Science Foundation of China
Project(2013)supported by the Scientific Research Foundation for the Returned Overseas Chinese Scholars,China
Projects(CL12129,201310533008)supported by the Undergraduates Innovative Training Foundation of Central South University,China
Project(Z12060)supported by the Undergraduate Free Exploration Innovation Foundation of Central South University,China
Project(CSUZC2013008)supported by the Open-End Fund for the Valuable and Precision Instruments of Central South University,China