超声无皂乳液原位合成Pd-P(MMA-AMPS)复合微球及其表征  

Preparation and characterization of Pd-P(MMA-AMPS) composite microspheres via ultrasonic emulsifier-free emulsion in situ polymerization

作　　者：王艳丽[1] 谭德新[2] 徐国财[2] 闵凡飞[1] 徐初阳[1] 

机构地区：[1]安徽理工大学材料科学与工程学院,淮南232001 [2]安徽理工大学化学工程学院,淮南232001

出　　处：《复合材料学报》2009年第3期67-72,共6页Acta Materiae Compositae Sinica

基　　金：教育部科技基金重点项目(206064);安徽省自然科学基金(050440907);安徽省高校自然科学基金(KJ2009B054ZKJ2009B120Z)

摘　　要：将超声波作用于含有2-丙烯酰氨基-2-甲基丙磺酸(AMPS)和甲基丙烯酸甲酯(MMA)的氯化钯水溶液中,在不加任何引发剂、乳化剂和还原剂的条件下,合成带有酰胺基、磺酸基等官能基团的Pd-P(MMA-AMPS)复合微球。考察了单体质量配比对复合微球形貌的影响,用XRD、TGA、FTIR、TEM和粒度分析仪等技术对样品进行表征,并探讨了合成反应机制。结果表明,超声辐射可实现Pd2+的还原与单体聚合的同步进行,并且金属钯与基体P(MMA-AMPS)共聚物之间存在一定的相互作用。优化条件下制得的复合微球,钯质量分数为20%左右,粒径约0.76μm,还原得到的钯粒子均匀分散于聚合物微球内。Palladium - poly（methyl methacrylate - 2 - acrylamido - 2 - methylpropanesulfonic acid） （Pd - P（MMA - AMPS））composite mierospheres, containing amide group and sulfonic acid group, were prepared in the palladium （II） chloride（PdC12 ） solution without initiator, emulsifier and reductant by ultrasonic irradiation emulsifier-free emulsion polymerization. The effect of the mass ratio of monomers on the morphology of the composite mierospheres was investigated, and the samples were characterized by XRD, TGA, FTIR, TEM and Zeta - sizer. The reaction mechanism of preparation in situ was also proposed. The results show that Pd^2＋ can be reduced to Pd^0 particles and the monomers are polymerized simultaneously. There is interaction between carbonyl group in the composite copolymer and metallic palladium. The composite microspheres with diameter of 0. 76 μm and 20% of palladium mass fraction are successfully synthesized under the optimized experimental condition. The mono-disperse metallic palladium particles are coated by the polymer matrix effectively.

关 键 词：无皂乳液聚合 超声辐射 Pd—P(MMA—AMPS) 复合微球 

分 类 号：O614.82[理学—无机化学]