摘要：以含乙烯基的硅烷偶联剂(A-151)处理Co3O4纳米粒子,在Co3O4粒子表面引入乙烯基,然后以K2S2O8为引发剂,十二烷基苯磺酸钠(SDBS)为乳化剂,采用乳液聚合,在Co3O4粒子表面接枝甲基丙烯酸丁酯,研究了影响Co3O4纳米粒子表面接枝的有关因素,并优化工艺参数。采用红外光谱、X射线光电子能谱等手段对表面接枝进行了表征。结果表明,甲基丙烯酸丁酯已经被成功地接枝到纳米Co3O4粒子的表面。热流传感器的热流灵敏度测试结果表明,Co3O4粒子表面改性后,它与硅树脂的复合涂层提高了热流传感器的热流灵敏度,相对于未处理的Co3O4粒子涂层,传感器灵敏度从0.052 mV.cm2/W提高到了0.065 mV.cm2/W。
关键词： Co3O4纳米粒子；甲基丙烯酸丁酯；表面接枝改性
Abstract: The Co3O4 nano-particles were firstly pretreated by the silane coupling agent containing vinyl group (A- 151) in order to introduce vinyl groups on their surfaces. Then the butylmethacrylate (BMA) was grafted onto the surface of Co3O4 particles through emulsion polymerization using K2S2O8 as initiator, sodium dodecyl benzene sulfonate (SDBS) as emulsifier. The factors influencing the graft of Co3O4 particles were investigated and the optimum parameters were obtained. The grafting characteristics were investigated through infrared spectra (IR) and X-ray photoelectron spectroscopy (XPS). The results showed that BMA was grafted successfully onto the surface of Co3O4 nano-meter particles. The calibrating test of the heat flow transducer revealed that the response rate of the transducer was improved greatly after Co3O4 nano-particles were treated. The response rate increased from 0.052 mV·cm2/W to 0.065 mV·cm2/W, compared with untreated Co3O4 nano-composites.
Keywords: Co3O4 nano-particles; butylmethacrylate; surface grafting modification
