Effect of graft ratio to temperature response of Dilute Thermoresponsive Polymer Brush Surfaces
作者单位：The school of life science Beijing institute of technology
会议名称：《第二十届全国色谱学术报告会及仪器展览会》
会议日期：2015年
学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学]
关 键 词：temperature response materials separation chromatography retention behavior
摘 要：4 kinds of PNIPAAm grafted silica with variable grafting ratio under the same grafting density were prepared via *** grafting density of ATRP-initiator was regulated through the feed ratio of acetic chloride to 2-bromoisobutyryl *** chemical group of the stationary phase was assayed by a Fourier transform infrared spectroscopy（FT-IR）method and the content of element C、H、N was measured by elemental *** grafting ratio was measured by Thermogravimetric analysis（TGA）.The rentention behavior of 4 kinds of steroids under different temperature was ***,lnk’of 10 kinds of compounds with different hydrophobicity was studied under 30°C and 35°*** results indicated that grafting ratio under the same grafting density had a significant influence on the separation *** the increase of grafting ratio,thermosensitivity was enhanced,peak width was increased,and elution time *** it is critical that best grafting rate of temperature sensitive chromatographic materials to separation.