微波辐射无皂乳液聚合法制备单分散交联PMMA微球及其性能研究
Preparation and Properties of Monodisperse-Crosslinked PMMA Microspheres Prepared by the Microwave Irradiation Soap-Free Emulsion Polymerization
贾慧灵 1郭峰 2吴锦绣 3谭心 2李森2
作者信息
- 1. 内蒙古科技大学机械工程学院,内蒙古 包头 014010;轻稀土资源绿色提取与高效利用教育部重点实验室,内蒙古 包头 014010;内蒙古自治区稀土湿法冶金与轻稀土重点实验室,内蒙古 包头 014010
- 2. 内蒙古科技大学机械工程学院,内蒙古 包头 014010
- 3. 内蒙古科技大学材料与冶金学院,内蒙古 包头 014010;轻稀土资源绿色提取与高效利用教育部重点实验室,内蒙古 包头 014010;内蒙古自治区稀土湿法冶金与轻稀土重点实验室,内蒙古 包头 014010
- 折叠
摘要
采用无皂乳液聚合法,以二乙烯苯为交联剂,氯化钾为电解质,过硫酸钾为引发剂,在微波辐射条件下制备了聚甲基丙烯酸甲酯(PMMA)微球.研究了过硫酸钾和氯化钾的物质的量浓度对PMMA微球的平均粒径和多分散性指数的影响,分析了微波功率、搅拌速度与PMMA微球形貌和粒径的关系.检测了不同pH值时PMMA乳液的电动(Zeta)电位,表明PMMA表面产生负电荷,使PMMA微球呈现稳定的分散状态.制备的PMMA呈现类球形,粒径为100～400 nm,在过硫酸钾物质的量浓度为5.69×10-3 mol/L及氯化钾物质的量浓度为1.03×10-2 mol/L时,微球的多分散性指数<0.1.原子力显微镜检测了最优工艺条件下,PMMA微球的力—位移曲线并分析了其弹性力学性能.
Abstract
Under the microwave irradiation,polymethyl methacrylate(PMMA)microspheres were prepared by the soap-free emulsion polymerization using divinylbenzene as a crosslinking agent,potassium chloride as an electrolyte and potassium persulfate as an initiator.The effects of potassium persulfate and potassium chloride molarities on the mean particle sizes and polydispersity index of PMMA microspheres were studied.The relationships between the microwave power,the stirring speeds,the morphologies and particle sizes of PMMA microspheres were analyzed.The electrokinetic(Zeta)potential of PMMA emulsion was measured at different pH values.The results show that the surfaces of PMMA microspheres produce a negative charge,and the PMMA microspheres show a stable dispersion state.The prepared PMMA microspheres were spherical with particle sizes of 100-400 nm.The polydispersity index of the microspheres is less than 0.1 when the molarity of potassium persulfate is 5.69×10-3 mol/L and the molarity of potassium chloride is 1.03×10-2 mol/L.The force-displacement curves of PMMA microspheres prepared at the optimum process conditions were measured by atomic force microscopy and their elastomechanical properties were analyzed.
关键词
聚甲基丙烯酸甲酯/微波辐射/无皂乳液聚合/单分散/粒径/多分散性指数Key words
Polymethyl Methacrylate/Microwave Radiation/Soap-Free Emulsion Polymerization/Monodisperse/Particle Size/Polydispersity Index引用本文复制引用
基金项目
国家自然科学基金项目(51965053)
国家自然科学基金项目(62365015)
内蒙古自然基金项目(2022MS05038)
出版年
2024
NETL
NSTL
万方数据