纳米导电不对称粒子的制备与表征
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摘要
采用细乳液聚合的方法制备不对称粒子,并以聚苯胺乳液进行杂化,形成纳米导电不对称粒子。研究了引发剂种类和第二单体投料方式对不对称粒子的形貌和粒径的影响,并使用透射电子显微镜和粒径分析仪等对粒子进行表征。结果表明,当使用水溶性引发剂,第二单体以20 g×h~(-1)恒速滴加时,不对称粒子特征明显。使用聚苯胺乳液对不对称粒子进行改性,从而获得导电纳米材料。不对称粒子乳液中杂化聚苯胺乳液会使得粒子粒径变大;当不对称粒子和聚苯胺质量用量比例1:1,不对称粒子压片后电导率会阶段性升高。至此,由杂化方法成功制备了纳米导电不对称粒子。
Asymmetric particles were prepared via mini-emulsion polymerization, and asymmetric conductive nano-particles were obtained via hybridization of those asymmetric particles with polyaniline emulsion. Effects of initiator type and second monomer feeding method on asymmetric particle morphology and size were characterized by transmission electron microscope and particle size analyzer. The results show that when a water soluble initiator and second monomer feeding rate of 20 g×h~(-1) are applied, the prepared particles show apparent asymmetric properties. In order to obtain conductive nano materials, polyaniline emulsion was used to hybridize the asymmetric particles. The results show that the size of the conductive asymmetric particle is larger than that of initial particles. Particle conductivity is periodically increased when the particles are prepared with mass weight ratio of asymmetric latex to polyaniline emulsion = 1:1, which indicates the asymmetric conductive nano-particles are successfully prepared.
Asymmetric particles were prepared via mini-emulsion polymerization, and asymmetric conductive nano-particles were obtained via hybridization of those asymmetric particles with polyaniline emulsion. Effects of initiator type and second monomer feeding method on asymmetric particle morphology and size were characterized by transmission electron microscope and particle size analyzer. The results show that when a water soluble initiator and second monomer feeding rate of 20 g×h~(-1) are applied, the prepared particles show apparent asymmetric properties. In order to obtain conductive nano materials, polyaniline emulsion was used to hybridize the asymmetric particles. The results show that the size of the conductive asymmetric particle is larger than that of initial particles. Particle conductivity is periodically increased when the particles are prepared with mass weight ratio of asymmetric latex to polyaniline emulsion = 1:1, which indicates the asymmetric conductive nano-particles are successfully prepared.
引文
[1]Almquist C B,Biswas P.Role of synthesis method and particle size of nanostructured Ti O2 on its photoactivity[J].Journal of Catalysis,2002,212(2):145-156.
[2]Law M,Goldberger J,Yang P.Semiconductor nanowires and nanotubes[J].Annual Review of Materials Research,2004,34(1):83-122.
[3]Guignard F,Lattuada M.Template-assisted synthesis of janus silica nanobowls[J].Langmuir,2015,31(16):4635-4643.
[4]Lone F,Cheong I W.Fabrication of polymeric janus particles by droplet microfluidics[J].RSC Advances,2014,4(26):13322-13333.
[5]Cao Z H,Chen H N,Zhu S D,et al.Preparation of janus Pd/Si O2 nanocomposite particles in inverse miniemulsions[J].Langmuir,2015,31(14):4341-4350.
[6]Ku K H,Kim Y J,Yi G R,et al.Soft patchy particles of block copolymers from interface-engineered emulsions[J].ACS Nano,2015,9(11):11333-11341.
[7]Li W,Gouton J D.Self-assembly of janus ellipsoids II:janus prolate spheroids[J].Langmuir,2013,29(27):8517-8523.
[8]Yuet K P,Hwang D K,Haghgooie R,et al.Multifunctional superparamagnetic janus particles[J].Langmuir,2010,26(6):4281-4287.
[9]Choi J,Zhao Y,Zhang D,et al.Patterned fluorescent particles as nanoprobes for the investigation of molecular interactions[J].Nano Letters,2003,3(8):995-1000.
[10]González M,Soares B G,Magioli M,et al.Facile method for synthesis of polyaniline/silica hybrid composites by simultaneous sol-gel process and“in situ”polymerization of aniline[J].Journal of Sol-Gel Science and Technology,2012,63(3):373-381.
[11]Kamchi N E,Belaabed B,Wojkiewicz J L,et al.Hybrid polyaniline/nanomagnetic particles composites:high performance materials for EMI shielding[J].Journal of Applied Polymer Science,2013,127(6):4426-4432.
[12]Kim S G,Kim J W,Choi H J,et al.Synthesis and electrorheological characterization of emulsion-polymerized dodecylbenzenesulfonic acid doped polyaniline-based suspensions[J].Colloid and Polymer Science,2000,278(9):894-898.
[13]YANG Yi(杨轶),YE Wei(叶伟),CHEN Xiao(陈晓).Preparation and controlled assembly of asymmetric janus patticle(非对称性Janus粒子的制备与可控组装)[J].Acta Physica-Chimica Sinica(物理化学学报),2012,28(11):2525-2535.
[2]Law M,Goldberger J,Yang P.Semiconductor nanowires and nanotubes[J].Annual Review of Materials Research,2004,34(1):83-122.
[3]Guignard F,Lattuada M.Template-assisted synthesis of janus silica nanobowls[J].Langmuir,2015,31(16):4635-4643.
[4]Lone F,Cheong I W.Fabrication of polymeric janus particles by droplet microfluidics[J].RSC Advances,2014,4(26):13322-13333.
[5]Cao Z H,Chen H N,Zhu S D,et al.Preparation of janus Pd/Si O2 nanocomposite particles in inverse miniemulsions[J].Langmuir,2015,31(14):4341-4350.
[6]Ku K H,Kim Y J,Yi G R,et al.Soft patchy particles of block copolymers from interface-engineered emulsions[J].ACS Nano,2015,9(11):11333-11341.
[7]Li W,Gouton J D.Self-assembly of janus ellipsoids II:janus prolate spheroids[J].Langmuir,2013,29(27):8517-8523.
[8]Yuet K P,Hwang D K,Haghgooie R,et al.Multifunctional superparamagnetic janus particles[J].Langmuir,2010,26(6):4281-4287.
[9]Choi J,Zhao Y,Zhang D,et al.Patterned fluorescent particles as nanoprobes for the investigation of molecular interactions[J].Nano Letters,2003,3(8):995-1000.
[10]González M,Soares B G,Magioli M,et al.Facile method for synthesis of polyaniline/silica hybrid composites by simultaneous sol-gel process and“in situ”polymerization of aniline[J].Journal of Sol-Gel Science and Technology,2012,63(3):373-381.
[11]Kamchi N E,Belaabed B,Wojkiewicz J L,et al.Hybrid polyaniline/nanomagnetic particles composites:high performance materials for EMI shielding[J].Journal of Applied Polymer Science,2013,127(6):4426-4432.
[12]Kim S G,Kim J W,Choi H J,et al.Synthesis and electrorheological characterization of emulsion-polymerized dodecylbenzenesulfonic acid doped polyaniline-based suspensions[J].Colloid and Polymer Science,2000,278(9):894-898.
[13]YANG Yi(杨轶),YE Wei(叶伟),CHEN Xiao(陈晓).Preparation and controlled assembly of asymmetric janus patticle(非对称性Janus粒子的制备与可控组装)[J].Acta Physica-Chimica Sinica(物理化学学报),2012,28(11):2525-2535.