Abstract:

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.

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。