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0.76 μm,还原得到的钯粒子均匀分散于聚合物微球内.
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