聚苯乙烯星型磺酸型拟均相催化剂合成及其催化应用  

Synthesis and application of vHP-SPS-Cat catalyst

作　　者：潘翠[1] 魏荣卿[2] 刘晓宁[2] 季杰[2] 姜岷[2] 

机构地区：[1]南京工业大学药学院,江苏南京211816 [2]南京工业大学生物与制药工程学院,江苏南京211816

出　　处：《功能材料》2013年第9期1324-1327,1331,共5页Journal of Functional Materials

基　　金：国家高技术研究发展计划(863计划)资助项目(2007AA02Z200;2011AA02A203)

摘　　要：以聚苯乙烯星型树脂(PS-g-LPS)为原料制备聚苯乙烯星型磺酸型拟均相催化剂(vHP-SPS-Cat),采用红外光谱(FT-IR)、元素分析及光学显微镜等技术对该催化剂进行表征,并考察其对乙酸和正丁醇的酯化反应的催化性能。结果表明,该催化剂因星型柔性链上磺酸基的拟均相催化作用,表现出优于传统均相催化剂浓硫酸以及两种固相磺酸树脂(大孔和凝胶)的催化性能,其最优催化条件为催化剂用量2.4 g/mol(相对于正丁醇)、n(乙酸)/n(正丁醇)=1.3∶1、反应时间为1h。该催化剂能够在125℃高温下使用10次,酯化产率不变。A （virtual homogeneous phase） sulfonated polystyrene catalyst （vHP-SPS-Cat） was prepared from the radial chain polystyrene resin （PS-g-LPS）. The catalyst was characterized by Fourier transform infrared spectroscopy（FT-IR） ,elemental analysis and optical microscope. Its catalyst activity for esterification of n-butanol and acetic acid was measured. Experimental results showed that the catalyst had a higher catalytic activity, ow- ing to its quasi homogeneous catalysis, than conventional homogeneous catalysts such as sulfuric acid and two other heterogeneous sulfonic acid resins （macroporous polystyrene resin and gel-type polystyrene resin）. The maximum yield was abtained when the amount of catalyst was 2.4g/mol （according to n-butanol）, molar ratio of acetic acid to n-butanol was 1.3 ： 1,and reaction time was lh. Moreover, the catalyst could be used more than 10 times under the high temperature of 125℃ without significant loss of activity.

关 键 词：聚苯乙烯星型磺酸型拟均相催化剂 磺化 酯化反应 拟均相催化剂 

分 类 号：O631.1[理学—高分子化学] O643[理学—化学]