CPVA微球表面接枝对羟基苯磺酸钠及其对茶碱的吸附研究  

Grafting of sodium p-hydroxybenzene sulfonate on surface of CPVA microspheres and its adsorption for theophylline

作　　者：吕振艳 王吉 马媛 门吉英[1] LV Zhen-yan;WANG Ji;MA Yuan;MEN Ji-ying(School of Chemistry and Chemical Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学化学与化工学院,山西太原030051

出　　处：《现代化工》2024年第3期130-135,共6页Modern Chemical Industry

基　　金：国家自然科学基金项目(21805249);山西省回国留学人员科研项目(2020-100);中北大学第18届研究科技立项项目(20221829)。

摘　　要：通过分子设计将2-氯乙基异氰酸酯(CIC)键合至聚乙烯醇微球(CPVA)表面制得CPVA-CIC,再将对羟基苯磺酸钠(HSS)固载于CPVA-CIC上制得功能微球CPVA-HSS。通过红外光谱(FI-TR)、扫描电子显微镜(SEM)及Zeta电位仪对功能微球进行表征,并考察主要因素对接枝微球固载量的影响,探索功能微球CPVA-HSS对茶碱分子的吸附性能及吸附机理。结果表明,通过CIC改性,阴离子单体HSS成功固载于基质CPVA表面,形成功能微球CPVA-HSS。CPVA-HSS对茶碱吸附5 h达到平衡,凭借其强的静电相互作用,pH5时在水溶液中吸附容量可达60 mg/g,随着温度的降低吸附量升高,而随介质盐度的增大吸附容量降低。功能微球的重复使用性较好。Through molecular design,2-chloroethyl isocyanate(CIC)is bonded onto the surface of polyvinyl alcohol microspheres(CPVA)to obtain CPVA-CIC.Sodium p-hydroxybenzene sulfonate(HSS)is solidly loaded on CPVA-CIC to produce CPVA-HSS functional microspheres,which are characterized by means of infrared spectroscopy(FT-IR),scanning electron microscopy(SEM)and zeta potential.The effects of main factors on the loading capacity of the grafted microspheres are examined and investigated.The adsorption performance and mechanism of CPVA-HSS for theophylline molecules are explored.Experimental results indicate that through CIC modification,HSS anionic monomer is successfully solidified on the surface of CPVA substrate to form CPVA-HSS.The adsorption of CPVA-HSS for theophylline has reached equilibrium in 5 h.Thanks to its strong electrostatic interaction,CPVA-HSS's adsorption capacity can reach 60 mg·g-1 in an aqueous solution with a pH of 5.The adsorption capacity of CPVA-HSS increases with the decrease of temperature,and declines with the increase of medium salinity.CPVA-HSS functional microspheres exhibit good reusability.

关 键 词：交联聚乙烯醇微球 对羟基苯磺酸钠 接枝微球 茶碱 2-氯乙基异氰酸酯 

分 类 号：O631.3[理学—高分子化学]