交联淀粉微球对对羟基苯甲醚的吸附行为及机理的探讨  

Adsorption behavior and mechanism of crosslinked starch microspheres for p-hydroxyanisole

作　　者：苏秀霞[1] 赵钤妃[1] 李仲谨[1] 景洁[1] 支娟娟[1] 

机构地区：[1]陕西科技大学化学与化工学院教育部轻化工助剂化学与技术重点实验室,陕西西安710021

出　　处：《化工进展》2011年第9期1926-1931,共6页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(50573046);陕西省教育厅产业化培育项目(02JC05);陕西科技大学研究生创新基金(SUST-B)项目

摘　　要：以可溶性淀粉为原料,通过反相悬浮聚合法,合成了一种交联淀粉微球(CSM)。研究了CSM对羟基苯甲醚的吸附行为,分析了其吸附动力学特性和热力学性质,并利用扫描电子显微镜(SEM)、傅里叶红外光谱仪(FTIR)和X射线衍射仪对淀粉微球及其吸附产物进行了表征,探讨其吸附机理。结果表明:在研究范围内,CSM对对羟基苯甲醚的吸附行为同时符合Langmuir和Freundlich等温吸附方程;在不同温度下,CSM吸附对羟基苯甲醚的吸附焓变(ΔH)、吸附熵变(ΔS)、吸附自由能变(ΔG)均为负值,吸附是一个自发、放热过程。The crosslinked starch microspheres（CSM）were synthesized from soluble starch by inverse suspension polymerization.The adsorption behavior of CSM for p-hydroxyanisole was investigated.The kinetics and thermodynamics characteristics were also studied.The structures of CSM before and after adsorption were characterized by particle size analyzer,scanning electron microscope,FT-IR spectroscopy and X ray diffraction（XRD）,and the mechanism of adsorption was also discussed.Within the framework of the study,the adsorption characteristics of CSM for p-hydroxyanisole obeyed the Langmiur and Freundlich adsorption isotherm equations.The enthalpy change ΔH,entropy change ΔS and free energy change ΔG for p-hydroxyanisole adsorbed by CSM were all negative at different temperatures.The adsorption was a spontaneous and exothermic process.

关 键 词：交联淀粉微球 对羟基苯甲醚 吸附机理 动力学 热力学 

分 类 号：TQ424[化学工程]