Coacervation Microencapsulation of CaCO3 Particles with a Fluoropolymer by Pressure-induced Phase Separation of Supercritical Carbon Dioxide Solutions

摘要：

　　We report a method for the coacervation micro-encapsulation of several forms of CaCO3 microparticles with the fluoropolymer poly(heptadecafluorodecyl acrylate) (poly (HDFDA)) by pressure-induced phase separation of a supercritical CO2 solution.A suspension of CaCO3 in CO2 and dissolved poly(HDFDA) were mixed in supercritical CO2.After the system pressure was slowly decreased to atmospheric pressure,the microcapsules were obtained.Coacervation was achieved by the precipitation of poly(HDFDA) during the decrease in the pressure of CO2; the solubility of poly(HDFDA) in CO2 decreased with the pressure.The structure and morphology of the microparticles were investigated by using a scanning electron microscope (SEM) and an electron probe microanalyzer (EPMA) equipped with a wavelength dispersive X-ray spectroscope (WDX).

关键词： component Supercritical Carbon Dioxide Microencapsulation Coacervation Fluoropolymer Calcium Carbonate

作者: Kenji Mishimna Haruo Yokota Takafumi Kato Tadashi Suetsugu Xiuqin Wei Keiichi Irie Kenichi Mishima Michihiro Fujiwara

作者单位: Department of Chemical Engineering,Fukuoka University,8-19-1 Nanakuma Jonan-ku, Fukuoka 814-0180, Ja Department of Electronics Engineering and Computer Science,Fukuoka University,8-19-1 Nanakuma Jonan- Department of Neuropharmacology,Fukuoka University,8-19-1 Nanakuma Jonan-ku, Fukuoka 814-0180, Japan

会议类型: 国际会议

会议名称: 2012年国际材料与化学工程研讨会

会议地点: 北京

会议语种:英文

页码: 181-184

在线出版日期: 2012-10-26（万方平台首次上网日期，不代表论文的发表时间）