首页期刊信息编委及顾问期刊发行联系方式使用帮助常见问题ENGLISH
位置:首页 >> 正文
单分散二氧化硅-苯乙烯复合微球的制备及表征
作者:马晶 杨明 周魁 
单位:武汉工业学院化学与环境工程学院 武汉 430023 
关键词:分散聚合 单分散 二氧化硅 改性 二氧化硅-苯乙烯 
分类号:TQ127/TQ24
出版年,卷(期):页码:2011,39(2):187-193
DOI:
摘要:

利用Stober方法制备了单分散SiO2微球,先用硅烷偶联剂(γ-methacrylic propyltrimethoxysilane,MPS)对SiO2进行改性,然后以改性的SiO2为种球,聚乙烯吡咯烷酮(polyvinyl pyrrolidone,PVP)为稳定剂,偶氮二异丁腈[2,2'-azobis(isobutyronitrile),AIBN]为引发剂,采用分散聚合法制备了单分散SiO2-苯乙烯(styrene)(简写为SiO2-St)复合微球。分析了不同条件下合成的SiO2-St复合微球的形态,考察了经MPS改性的SiO2微球的粒径、PVP,AIBN和苯乙烯的浓度对复合微球形态的影响。结果表明:改性后的SiO2微球能够成功地被苯乙烯包覆形成SiO2-St复合微球。粒径为250 nm的改性SiO2微球的复合效果最佳,形成的SiO2-St复合微球表面光滑,球形度较好,具有良好的单分散性。最优的反应条件是改性SiO2为0.1 mol/L,无水乙醇为20 mL,PVP为0.23 mmol/L,AIBN为6.10 mmol/L,苯乙烯为0.60 mmol/L和水5 mL。

how to cheat women who want to cheat wife cheat story
online click open
why do wife cheat on husband women that cheat with married men how to cheat wife

Monodispersed SiO2 microspheres were prepared by Stober method, and then the SiO2 microspheres were modified by γ-methacrylic propyltrimethoxysilane (MPS) as coupling agent, finally silica-styrene (SiO2-St) composite microspheres were prepared through dispersion polymerization method using modified SiO2 as seed, polyvinyl pyrrolidone (PVP) as stabilizing agent and 2,2'-azobis(isobutyronitrile)(AIBN) as initiating agent. The morphology of SiO2-St composite microspheres synthesized at different reaction conditions was analyzed. Influence of the diameter of SiO2 microspheres modified by MPS, the concentration of PVP, AIBN and styrene on the morphology of SiO2-St composite microspheres were investigated. The results indicate that the modified SiO2 microspheres can be coated successfully by styrene. And the SiO2-St composite microspheres have smooth surface, better sphericity and good monodisperse. Optimal coating effect is obtained when using SiO2 microsphere of 250 nm in diameter as seed. The optimal composition of reactive raw materials is: 0.1 mol/L grafted silica, 20 mL absolute alcohol, 0.23 mmol/L PVP, 6.10 mmol/L AIBN, 0.60 mmol/L styrene and 5 mL H2O.

My wife cheated on me women cheat because reasons married men cheat
abortion pill abortion pill abortion pill
基金项目:
作者简介:
硕士研究生
online click open
printable coupons for cialis outbackuav.com coupon for free cialis
参考文献:

[1] 刘世权, 王立民, 刘福田, 等. SiO2微球的制备与应用[J]. 功能材料, 2004, 35(1): 11-13. LIU Shiquan, WANG Liming, LIU Futian, et al. J Funct Mater (in Chinese), 2004, 35(1): 11-13. [2] 施用, 邵磊, 陈建峰, 等. SiO2包覆纳米CaCO3的透射电镜表征[J]. 分析测试学报, 2006, 25(3): 103-105. SHI Yong, SHAO Lei, CHEN Jianfeng, et al. J Lnstrum Anal (in Chinese), 2006, 25(3): 103-105. [3] BLADERN A V, VRIJ A. Synthesis and characterization of monodispersion colloidal organic-silica spheres [J]. J Colloid Interface Sci, 1993, 156: 1-5. [4] NOZAWA K, GAILHANOU H, RAISON L, et al. Smart control of monodisperse Stober silica particles: effect of reactant addition rate on growth process [J]. Langmüir, 2005, 21: 1516-1523. [5] 符远翔, 孙艳辉, 葛杏心. 单分散纳米二氧化硅的制备与表征[J]. 硅酸盐学报, 2008, 27(1): 154-159. FU Yuanxiang, SUN Yanhui, GE Xingxin. J Chin Ceram Soc (in Chinese), 2008, 27(1): 154-159. [6] 平贵臣, 杜滨阳, 王丽颖, 等. 表面活性剂包埋的硫化锌纳米粒子LB膜制备[J]. 化学物理学报, 1999, 12(6): 659-662. PING Guichen, Du Binyang, WANG Liying, et al. J Acta Phys-Chim Sin (in Chinese), 1999, 12(6): 659-662. [7] 范牛奔, 钱翼清, 孟海兵. TDI 改性纳米氧化硅表面[J] . 南京化工大学学报, 2001, 23(3): 10-13. FAN Niuben, QIAN Yiqing, MENG Haibing. J Nanjing Univ Chem Technol (in Chinese), 2001, 23(3): 10-13. [8] DEMJ EN Z, PU KANSZKY B, JOZSEF J. Possible coupling reaction of functional silanes and polypropylene [J]. Polymer, 1999, 40(7): 1763-1773. [9] HAYASHI Shinji, FUJIKI Kazuhiro, TSUBOKAWA Norio. Grafting of hyperbranched polymers onto ultrafine silica: postgraft polymerization of vinyl monomers initiated by pendant initiating groups of polymer chains grafted onto the surface [J]. React Funct Polym, 2000, 46(2): 193-201. [10] YU M, WANG H, LIN C K, et al. Sol-gel synthesis and photolum- inescence properties of spherical SiO2/LaPO4:Ce3+/Tb3+ particles with a core-shell structure [J]. J Nanotechnol, 2006, 17: 3245-3252. [11] LIN G X, HONG G Y. Synthesis of SiO2/Y2O3:Eu one-shell materials and hollow sphere [J]. J Solid State Chem, 2005, 178: 1647-1651. [12] ZHANG Kai, CHEN Haitao, CHEN Xin, et al. Monodisperse silica- polymer core-shell microspheres via surface grafting and emulsion polymerization [J]. Macromol Mater Eng, 2003, 288: 380-385. [13] WU Tianbin, KE Yangchuan. Preparation of silica-PS composite particles and their application in PET [J]. J Eur Polymer, 2006, 42: 274-285. [14] YANG Z Z, QIU D, LI J. Waterborne dispersions of a polymer-encap- sulated inorganic particle nanocomposite by phase-inver emulsification [J]. Macromol Rapid Commun, 2002, 23: 479-483. [15] PATTEN T E, WERNE T VON. Atom transfer radical polymerization from Nanoparticle: A tool for the preparation of wall-defined hybrid nanostructures and for understanding the chemistry of controlled/"living" radical polymerizations from surface [J]. J Am Chem Soc, 2001, 123: 7497-7505. [16] STOBER W, FINK A, BOHN E. Controlled growth of monodisperse silica in the micron size range [J]. J Colloid Interface Sci, 1968, 26: 62-69.

how to catch a cheater redirect go
why do wife cheat on husband why wifes cheat how to cheat wife
服务与反馈:
文章下载】【加入收藏
中国硅酸盐学会《硅酸盐学报》编辑室
京ICP备10016537号-2
京公网安备 11010802024188号
地址:北京市海淀区三里河路11号    邮政编码:100831
电话:010-57811253  57811254    
E-mail:jccs@ceramsoc.com