基于ATRP法制备的触角状亲水性羟胺树脂的吸硼性能的研究

以大分子引发剂氯乙酰化聚苯乙烯微球(PS-acyl-Cl)经原子转移自由基聚合(ATRP)法引发丙烯酰胺(AM)和甲基丙烯酸缩水甘油酯(GMA)单体的共聚接枝,制得一种触角状亲水性环氧载体(PS-acyl-g-P(AM-co-GMA)),再经二乙醇胺(DEA)的环氧基开环胺化反应,得到一种含多个-NCH2CH2OH螯合配基的多齿-五元螯合环的触角状亲水性羟胺树脂(PS-acyl-g-P(AM-co-GMA)-DEA)。将此树脂用于硼吸附研究,结果表明,PS-acyl-g-P(AM-co-GMA)-DEA树脂对硼的吸附满足Langmuir方程,为单分子层吸附;饱和吸附量约为37.7 mg·g-1,且树脂5 min即可达到吸附平衡,与其它已报道的吸硼树脂相比,该树脂具有更高的吸附量和吸硼速率。吸附动力学研究表明,树脂吸附硼的过程主要由颗粒扩散过程控制。重复使用5次后该树脂的吸附量基本不变,解吸率均在90%以上,重复使用性能良好。     

三甲铵型阴离子交换树脂的制备及其对Cr(VI)的吸附性能

用氯乙酰化聚苯乙烯树脂代替传统的氯甲基化聚苯乙烯树脂,通过与三甲胺反应得到一种新型的三甲铵型强碱性阴离子交换树脂,对该树脂进行了红外光谱表征、元素分析及微孔结构的测定,同时研究了其对Cr(VI)的静态吸附性能. 结果表明,该树脂对Cr(VI)的吸附量随pH的降低而增加,pH=2时最大吸附量达117 mg/g. 吸附过程在实验浓度范围内符合Langmuir和Freundlich方程,相关系数分别为0.9988和0.9769. 动力学研究表明,吸附过程符合Boyd液膜扩散方程,相关系数为0.9927. 热力学函数DG0<0,表明该吸附过程为自发过程;DH0=-3648.16 J/mol,说明该吸附过程为放热过程,同时DS0=3.98 J/(K×mol),说明吸附过程熵增加占主导作用. 吸附后用5%的NaOH可以将Cr(VI)洗脱,洗脱率达96%以上.     

PS-Cy和PS-Acyl-Cy树脂的制备及其吸附对硝基酚

用1,4,7,10-四氮杂环十二烷(Cyclen)分别修饰氯甲基化的聚苯乙烯微球及氯乙酰化的聚苯乙烯微球,合成Cyclen型聚苯乙烯(PS-Cy)树脂及Cyclen型氯乙酰化的聚苯乙烯(PS-Acyl-Cy)树脂。测定了两种树脂的增重率及全交换容量并研究了其吸附动力学。结果表明:PS-Cy树脂的全交换容量达1.59 mmol/m L,对对硝基酚(PNP)的最大吸附量达118.93 mg/m L,吸附过程符合Langmuir模型;而PS-Acyl-Cy树脂的全交换容量为1.45 mmol/m L,对PNP的最大吸附量为90.87 mg/m L,吸附过程符合Freundlich模型。两种树脂的吸附过程都符合准二级动力学方程并且液膜扩散为主要控制步骤。     

聚苯乙烯-L-半胱氨酸树脂的合成及其对Pb~(2+)、Hg~(2+)的吸附研究

氯甲基聚苯乙烯微球与L-半胱氨酸(L-Cys)胺解反应合成聚苯乙烯-L-半胱氨酸树脂,通过红外光谱表征了树脂结构,测定了其树脂的比表面和孔结构等数据,研究了该树脂在不同温度下对Pb~(2+)、Hg~(2+)的吸附等温线,利用热力学函数关系计算出了吸附焓、自由能和熵。结果表明其合成的Cys树脂对水溶液中Pb~(2+)、Hg~(2+)离子有较好的吸附性能。     

聚苯乙烯酚醛吸附树脂的合成及对水中苯酚的吸附性能

用氯甲基化聚苯乙烯分别与2-萘酚和S-联萘酚反应,制成了以聚苯乙烯为基质的酚羟基修饰的PS-N树脂和PS-SD树脂,用静态和动态方法研究了PS-N树脂和PS-SD树脂的吸附行为,研究发现:两种树脂对苯酚的吸附都为放热吸附,主要为氢键吸附。与PS-N树脂相比,PS-SD树脂具有更大的比表面积,对苯酚的吸附量明显大于PS-N树脂,有更好的应用前景。     

异丙醇胺化聚苯乙烯螯合树脂的制备及其对Cr(Ⅵ)的吸附

为了吸附水中的Cr(VI),通过母体氯甲基化聚苯乙烯(氯球)与配体异丙醇胺(IPA)的接枝反应,制得异丙醇胺化聚苯乙烯螯合树脂(IPAR),并通过红外光谱、元素分析、热失重分析等手段对IPAR结构进行表征.将IPAR作为吸附材料对水中的Cr(VI)进行吸附,探究pH、共存离子、温度等因素对吸附量的影响,结果表明在pH=...     

大孔超高交联聚苯乙烯树脂的硝化修饰及吸附性能研究

用大孔超高交联聚苯乙烯树脂(简称HPS树脂)进行硝化反应,得到了硝化修饰的大孔超高交联聚苯乙烯树脂(简称HPS-NO_2树脂)。红外分析、元素分析测定了HPS-NO_2树脂的硝化程度;通过交换量测定确定了HPS-NO_2树脂因氧化反应引入羧基的量。采用氮气吸-脱附法测定了HPS、HPS-NO_2树脂的比表面积和孔结构参数。并考察了HPS、HPS-NO_2树脂对水溶剂、环己烷溶剂中苯酚和苯胺吸附机理及性能。     

Cyclen型聚苯乙烯树脂的结构与吸附性能

采用1,4,7,10-四氮杂环十二烷(Cyclen)修饰氯甲基化的聚苯乙烯微球,合成了新型的Cyclen型聚苯乙烯(PS-Cy)树脂。采用傅里叶变换红外光谱表征了PS-Cy树脂的结构,测定了PS-Cy树脂的增重率及全交换容量,研究了PS-Cy树脂的吸附动力学及其等温吸附过程。结果表明:PS-Cy树脂的全交换容量达5.31 mmol/g,对Cu2+的最大吸附量达160.00 mg/g;液膜扩散为PS-Cy树脂吸附Cu2+的主要控制步骤;吸附过程符合Langmuir模型,为单分子层吸附。     

硝酸银负载型阳离子交换树脂的制备及其对水溶液中溴离子的吸附研究

利用硝酸银溶液对D001大孔型磺酸基聚苯乙烯阳离子树脂进行浸渍处理,制备出硝酸银负载型阳离子交换树脂.将离子树脂作为载体,对水溶液中的溴离子进行吸附性能测试.通过改变吸附剂用量、吸附时间和吸附温度,探究不同吸附条件对吸附剂吸附水中溴离子性能的影响.结果表明:该吸附剂使用的优化条件为吸附剂添加量1 g、吸附时间40 min、吸附温度25℃.在该优化条件下,吸附剂对水中溴离子的吸附量为64.97 mg·g-1,吸附率可达99.96％.     

硝酸银负载型阳离子交换树脂的制备及其对水溶液中溴离子的吸附研究

利用硝酸银溶液对D001大孔型磺酸基聚苯乙烯阳离子树脂进行浸渍处理,制备出硝酸银负载型阳离子交换树脂.将离子树脂作为载体,对水溶液中的溴离子进行吸附性能测试.通过改变吸附剂用量、吸附时间和吸附温度,探究不同吸附条件对吸附剂吸附水中溴离子性能的影响.结果表明:该吸附剂使用的优化条件为吸附剂添加量1 g、吸附时间40 min、吸附温度25℃.在该优化条件下,吸附剂对水中溴离子的吸附量为64.97 mg·g-1,吸附率可达99.96％.     

The conditions of cationic exchange with the use of recycling polystyrene derivative,the product of sulfonation by silica sulfuric acid

Growing amount of waste plastics has become an environmental problem on a global scale. This study presents an investigation of the conditions of cleaning water from heavy metal ions using chemically recycled polystyrene. To get effective ion exchangers, the sulfonation of virgin polystyrene and expanded polystyrene wastes were obtained using silica sulfuric acid. As it turned out, the use of this solid sulfonating agent simplifies the separation of the polymeric product from the acid and the solvent in comparison to conventional sulfonation methods. The ion exchange behavior of copper and zinc cations in the yielded sulfonated derivatives of polystyrene was studied. Batch shaking adsorption experiments depending on contact time, pH, temperature, and dosage of adsorbate were carried out. The stability of resin to cyclical adsorption and regeneration (column experiment) was also investigated. We report that resins have a high adsorption efficiency with total ion exchange capacity (IEC) about 2.6 meq g^?1, which drops with decreasing pH owing to competition between protons H⁺ and metal cations, whereas with the increasing resin doses the removal of cations rises for a constant initial metal concentration. The speed of cation exchange for yielded adsorbents was even better than for commercial resins. After 360 cyclical adsorption and regeneration in column, resin had working IEC of about 2.3 meq g^?1. The study shows that cation exchange resin from polystyrene wastes can be used as an efficient adsorbent for the removal of heavy metal ions from water. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013     

Mannich反应制备氨基树脂及由其制备的螯合树脂的吸附性能

以乙酰化聚苯乙烯微球为原料经Mannich反应制备了氮含量达13 7mmol/g的氨基树脂,再由该氨基树脂制备了氨基羧酸型和氨基膦酸型螯合树脂,测试了两种螯合树脂对Cu2+、Zn2+、Ni2+的吸附性能。体系中乙酰基会发生多取代反应。将螯合Cu2+、Zn2+、Ni2+离子的树脂吸附牛血清白蛋白第五组分(BSA-V),结果表明氨基羧酸型树脂对BSA-V的吸附性能优于氨基膦酸型树脂。     

Pulse Chromatographic Studies of Adsorption of CO2, CH4, and N2 Using Amine Functionalized Polystyrene Adsorbents

Adsorption of CO₂, CH₄, and N₂ was investigated using pulse concentration chromatography on polystyrene functionalized by covalently attached diethanolamine, dimethylamine, imidazole, and N-methyl piperazine. The adsorption equilibrium constants at different temperatures were estimated by fitting the experimental chromatograms into a non-linear equilibrium dispersive chromatography model using gPROMS. Axial dispersion was found to be the controlling mechanism for dispersion of the chromatograms. The heat of adsorption and corresponding equilibrium selectivities were determined from the adsorption equilibrium constants. The imidazole based adsorbent showed the highest affinity for CO₂.     

Methylamino‐group‐modified hypercrosslinked polystyrene resin for the removal of phenol from aqueous solution

Chemical modification was performed for macroporous crosslinked chloromethylated polystyrene. The obtained HJ‐K01 resin was used to remove phenol from aqueous solution, and its adsorption behaviors for phenol were compared with commercial Amberlite XAD‐4. The results indicate that methylamino groups were successfully uploaded onto the surface of the HJ‐K01 resin and the adsorption capacity of phenol onto the HJ‐K01 resin was much larger than that onto XAD‐4. Furthermore, the original phenol solution was suitable for the adsorption, the adsorption isotherms could be fitted by the Freundlich model, and its kinetic curves could be characterized by a pseudo‐second‐order rate equation. The fixed‐bed column adsorption demonstrated that the HJ‐K01 resin was an excellent resin for the removal of phenol. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

Acetamide‐modified hyper‐cross‐linked resin: Synthesis,characterization, and adsorption performance to phenol from aqueous solution

Acetamide‐modified hyper‐cross‐linked resin, HCP‐HMTA‐AA, was prepared and its adsorption performance was evaluated using phenol as the adsorbate. The prepared HCP–HMTA–AA owned predominant micro/mesopores and medium polarity, making it possess a superior adsorption to phenol as compared with polystyrene (PS), chloromethylated polystyrene (CMPS), hyper‐cross‐linked polymer (HCP) and amino‐modified hyper‐cross‐linked resin (HCP–HMTA). The adsorption enthalpy was ?99.56 kJ/mol at zero fractional loading, multiple hydrogen bonding contributed to such a great adsorption enthalpy and an approximately planar hexahydric ring was formed between acetamide of HCP–HMTA–AA and phenol. The dynamic capacity of phenol on HCP–HMTA–AA was 291.3 mg/g at a feed concentration of 946.2 mg/L and a flow rate of 48 mL/h and the resin column was almost regenerated by a mixed solvent including 50% of ethanol (v/v) and 0.01 mol/L of sodium hydroxide (w/v). HCP–HMTA–AA was repeatedly used for five times and the equilibrium adsorption capacity for the five time reached 94.2% of the equilibrium adsorption capacity for the first time. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132, 41597.     

8羟-基喹哪啶新型树脂的合成及其对Cu~(2+)的吸附性能研究

以交联聚苯乙烯树脂为原料,经硝化、还原、重氮化和偶联反应,合成了含8-羟基喹哪啶功能基的新型螯合树脂(PS-HQD)。研究了新螯合树脂对铜离子的吸附性能。实验结果表明,在pH 6.0时,静态饱和吸附容量为25.72 mg/g树脂。一次洗脱回收率达95.42%。吸附过程符合Langmu ir和Freund lich模型。     

一种多羟基螯合树脂的合成及其对硼的吸附

以氨基葡萄糖和聚苯乙烯为原料合成新的螯合树脂,检测了螯合树脂的氯含量和红外光谱;然后利用氨基葡萄糖螯合树脂与硼的螯合性质,通过实验研究其对硼的吸附能力,并研究了温度、时间等影响螯合树脂吸附的因素。根据热力学有关原理,计算出树脂吸附硼的热力学数据,从而得出树脂对硼的吸附效果。结果表明:合成的螯合树脂对硼有一定的吸附效果;较高温度有利于吸附,为吸热反应;ΔG小于0,吸附过程可以自发的进行。     

Synthesis of polystyrene‐supported glucosamine resin and its adsorption properties for metal ions

A novel chelating resin polystyrene‐supported glucosamine was prepared by the reaction of chloromethylated polystyrene with glucosamine hydrochlorate, using anhydrous potassium carbonate as catalyst and dimethylformamide as solvent. Infrared spectra and elementary analysis were used to confirm its structure. The adsorption of the resin for Cu²⁺, Ni²⁺, Hg²⁺, Co²⁺, Cd²⁺, and Pb²⁺ was investigated, as well as various factors affecting the adsorption such as time, temperature, ion concentration, and pH. The results showed that the resin had good adsorption capacities for Cu²⁺, Ni²⁺, and Hg²⁺. The adsorption was controlled by liquid film diffusion and adsorption isothermal data could be well interpreted by the Freundlich equation. Values of adsorption activation energy and adsorption Gibbs free energy were calculated. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 95: 890–896, 2005     

新型Gly-DPS树脂的合成及其对黄芩苷的吸附性能

以聚苯乙烯为母体,通过硝化、氨基化、引入功能基等反应合成了具有氨基酸型功能基团大孔吸附树脂(Gly-DPS);研究了该树脂对黄芩苷的静态吸附、脱附、动态吸附、吸附动力学过程。结果表明,在体系pH为5.5,温度为25℃的条件下,树脂对黄芩苷的静态吸附量和动态吸附量分别为142.1 mg/g、49.4 mg/g。使用pH为8、70%乙醇水溶液作为洗脱剂,洗脱率可达94.3%。     

浅色高纯聚苯乙烯磺酸钙阳离子交换树脂的制备

聚苯乙烯磺酸钙阳离子交换树脂是新型的降血钾树脂。在制备浅色高纯聚苯乙烯磺酸钠阳离子交换树脂技术路线基础上,用浅色高纯聚苯乙烯磺酸钠阳离子交换树脂为原料,与钙交换剂交换得到药用聚苯乙烯磺酸钙阳离子交换树脂。