摘要
本文利用BET比表面积分析仪、紫外吸收光谱仪、高效液相色谱仪等手段研究了包括硅藻土、海泡石、高岭土、白炭黑、滑石粉、蒙脱石、玉米淀粉等7种常见水分散颗粒剂填料的表面性质如比表面积、孔容和孔径等性质;4种分散剂(SD-816、2700、NNO、D425)和各种填料伍配后分散悬浮性分析以及各填料对分散剂的吸附量大小;各填料对戊唑醇原药溶液的吸附动力学研究。分析得到蒙脱石的比表面积最大,达到了242.965m2/g,白炭黑、硅藻土次之;白炭黑的孔容最大,达到0.400cm2/g,玉米淀粉的孔容最小,只有0.021cm2/g,各种填料的孔大小都属于介孔;4种分散剂对硅藻土、玉米淀粉以及滑石粉的分散悬浮能力较好,蒙脱石对4种分散剂的吸附量均最大,玉米淀粉对4种分散剂的吸附量均最小;各填料对戊唑醇原药的吸附动力学数据用一级动力学方程模型拟合最好。
Thesurface properties of sevencommon pesticide fillers, including specific surface area, bore diameter and pore volume, were investigated by BET specific surface area analyzer,the ultraviolet absorption spectros copy and HPLC. The suspension performance and the adsorption capacity of 4 dispersants(SD-816, 2700, NNO, D425) on different fillers were tested.The adsorption kinetics of tebuconazole adsorbed by different fillers were determined by HPLC.The results showed that montmorillonite had the largest specific surface area of 242.965m2/g,and silica had the largest total pore volume of 0.400cm2/g. All the tested fillers belongs to mesoporous. All the four dispersants provided a good suspension ability to diatomite, cornstarch and talcum powder. Montmorillonite showed the biggestadsorption capacity for four dispersants, and corn starch showed the smallest. The First-order equation was the best fitting model for the adsorption kinetics of tebuconazole adsorbed by different fillers.
出处
《农药科学与管理》
CAS
2015年第7期35-41 51,51,共8页
Pesticide Science and Administration
基金
国家科技支撑基金资助项目(编号:2011BAE06B06-4)
国家自然科学基金资助项目(编号:21172147)
