胺化聚苯乙烯树脂的合成及其吸附性能.pdf

石油化工
2015年第44卷第6期
PETROCHEMICAL TECHNOLOGY
?735
神料
胺化聚苯乙烯树脂的合成及其吸附性能
孟启,周峰
(常州大学石油化工学院,江苏常州213000
[摘要]以氯甲基化聚苯乙烯树脂黴球为母体,分别与三乙烯四胺和1,4,7,10-四氮杂环十二烷反应制备了胺化聚苯乙烯树
脂(PS-TETA)和新型 Cyclen?型聚苯乙烯树脂(PS-Cy)。采用FTIR和BET方法表征了树脂的结构;利用紫外-可见分光光度计
研究了树脂对对硝基苯酚(PNP)的吸附性能。表征结果显示,PS-TETA和PS-Cy可吸附PNP。实验结果表明,随PNP溶液pHI
的増大,PS-TETA和PS-Cy对PNP的吸附呈先增大后趋于平缓再不断下降的趋势,吸附过程符合准二级动力学方程,且主要
控制步骤为Boyd液膜疒散形式。25℃下,PS-TETA和PS-Cy对PNP的平衡吸附量分别为12634mgmL和118.93mgmL。PS
TETA吸附PNP为多分子层吸附;PS-Cy对PNP的吸附为单分子层吸附。两者对PNP的吸附过程均为放热过程,且以物理吸附
的形式为主
[关鍵词胺化聚苯乙烯;对硝基苯酚;1,4,7,10-四氮杂环十二烷;吸附;液膜扩散
文章编号]1000-8144(2015)06-0735-07
[中图分类号]TQ424.3
[文献标志码」A
Synthesis and Adsorbability of Aminated Polystyrene Resins
Meng Qi, Zhou Feng
(Petrochemical Institute of Changzhou University, Changzhou Jiangsu 213000, China
Abstract] Triethylenetetramine crosslinked polystyrene (PS-TETA) and 1, 4, 7, 10-
tetraazacyclododecane( cyclen modified polystyrene(ps-cy) were synthesized by the reaction
of chloromethyl polystyrene microspheres with triethylenetetramine and cyclen, respectively. The
synthesized resins were characterized by means of FTIR and BET. The results showed that PS-TETA
and PS-CY can adsorb -nitrophenol(PNP). The adsorbilities of the resin to PNP were studied by
means of Uv-vis. The results indicaed that with increasing PH, the adsorption of PNP on PS-TETA
and Ps-cy firstly increased, then leveled off and finally declined. Both the two adsorption processes
accorded with the pseudo-second-order kinetics equation and the liquid film diffusion was the major
ontrolling step. At temperature of 25 C, the equilibrium adsorption capacities of PS-TETA and PS
Cy to PNP were 126.34 mg/ml and 118.93 mg/ml, respectively. The adsorption process on PS-TETA
is of multi-molecular layer adsorption while the adsorption process on PS-CY is of mono-molecular
layer adsorption. Both the adsorption processes on PS-TETA and Ps-cy are exothermic and are mainly
physical adsorption
Keywords] aminated polystyrene resins; p-nitrophenol; 1, 4, 7, 10-tetraazacyclododecane
adsorption; liquid film diffusion
吸附树脂对有机物的吸附主要通过硫水作的有N,O,F等。对吸附树脂的功能基团进行化
用、氢键作用和x-π作用等,与氢原子形成氢键学修饰时,N原子具有更大的氢键碱性23,更易
的一般是电负性较大、有孤对电子的原子,常见与含键的有机物(如酚类)形成氢键,从而对
[收稿日期]2014-12-24;[修改稿日期]2015-03-15s
[作者简介]孟启(1965-),男,安徽省芜湖市人,博士,教授,电话13961192113,电邮mangal(@oczu,edu.cna
基金项目]」江苏省高校自然科学重大基础研究项目(O8KJA430001)。