摘要
采用液相化学还原法,以硝酸银作银源研究反应物的浓度、表面活性剂用量、温度等因素对纳米银形貌和粒径的影响。在常温,较高Ag NO3质量浓度(30 g/L)下,使用1.2 g的PVP制备出平均粒径在80 nm的纳米银胶,并探讨了其热性能与导电性能。结果表明,随着银胶质量浓度的增大,其导电性有所增加。所制备的纳米银胶不残留各种无机物,经浓缩后可直接获得导电油墨,避免了传统制备导电油墨过程的离心分散造成的产量损失与二次改性问题。
The silver nanoparticles are prepared by chemical reduction method in aqueous solutions using silver nitrate as a source of silver. The effects of the concentration of reactants, the amount of surfactant and temperature on morphology and size of silver nanopartieles are studied. The silver colloids with an average size of 80nm are obtained by using 1.2 g of PVP and high concentration （ 30 g/L ） of AgNO3 at room temperature. Their thermal behavior and conductivity are also discussed. The results show that the conductivity increases with the increase of silver sol concentration. Silver colloids obtained have no residual inorganics and can be directly used as conductive ink, which effectively avoids the reduction of silver particles in the centrifuge process and the second surface modification of silver nanopartieles.
出处
《现代化工》
CAS
CSCD
北大核心
2015年第1期87-91,共5页
Modern Chemical Industry
关键词
纳米银
化学还原法
水合肼
导电性
silver nanoparticles
chemical reduction
hydrazine hydrate
conductivity
