摘要
采用KH570对纳米SiO_(2)进行改性,将其作为Pickering乳液的稳定剂;利用反相(Pickering)乳液聚合法制备SiO_(2)@丙烯酰胺(AM)-丙烯酸(AA)共聚物复合微球,并对改性前后纳米SiO_(2)以及复合微球的结构、形貌及质量损失进行了表征;探究pH值、温度和单体比例对复合微球吸附Cu^(2+)效果影响,并对吸附过程进行动力学和吸附等温线拟合。结果表明,改性后的纳米SiO_(2)亲油性增强,提高稳定乳液的能力;Cu^(2+)吸附实验表明,复合微球吸附的最佳pH值为6,且吸附量随着AA用量增加而增大;复合微球吸附Cu^(2+)的过程符合准二级动力学模型和Langmuir模型。
Nano-SiO_(2) was modified by KH570,which was used as the stabilizer of Pickering emulsion;SiO_(2)@Acrylamide(AM)-acrylic acid(AA)copolymer composite microspheres were prepared by inverse phase(Pickering)emulsion polymerization.The structure,morphology,and mass loss of the prepared composite microspheres and nano-SiO_(2) before and after modification were characterized.The effects of pH,temperature and monomer ratio on the adsorption of Cu^(2+)by composite microspheres were studied,and the kinetics and isothermo of the adsorption process were fitted at the same time.The results showed that the modified nano-SiO_(2) had enhanced lipophilicity and improved the ability to stabilize the emulsion;the Cu^(2+)adsorption experiment showed that the optimum pH value for the adsorption of composite microspheres was 6,and the adsorption amount increased with the increase of AA dosage.The fitting results of the adsorption process of Cu^(2+)by the spheres showed that they fit the pseudo-second-order kinetic model and the Langmuir model.
作者
王美荣
林凌
许爱
熊贵霞
罗云翔
WANG Meirong;LIN Ling;XU Ai;XIONG Guixia;LUO Yunxiang(College of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu 610500,China;WUPU Drilling Branch,SINOPEC North China Petroleum Engineering Co.,Ltd.,Xinxiang 453700,China)
出处
《应用化工》
CAS
CSCD
北大核心
2024年第6期1274-1279,共6页
Applied Chemical Industry
基金
国家自然科学基金面上项目(5237041601)。
