氨基膦酸树脂对镱的吸附及机理

氨基膦酸树脂 ( APAR)对镱 ( )的吸附在 p H=5 .1时最佳。静态饱和吸附容量为 2 75 mg/g千树脂 ;用 3.0～ 4.0 mol· L- 1HCl能还原洗脱。测得吸附速率常数k2 98=9.5 7× 1 0 - 6 s- 1,等温吸附服从 Freundlich经验式 ,吸附热力学函数△ H0 =1 7.6k J· mol- 1。吸附机理表明 ,APAR功能基上的 N、O与 Yb3+发生配位键合 ,配位摩尔比为 2∶ 1     

氨基膦酸螯合树脂吸附重稀土的研究

研究了重稀土在氨基膦酸树脂的吸附行为.试验结果表明,氨基膦酸树脂对重稀土的吸附在pH=5.0的HAc-NaAc缓冲溶液时最佳;298K时静态饱和吸附容量为332mg/g干树脂;用2mol/L盐酸洗脱,洗脱率为91.2%;等温吸附服从Freundlich经验式;吸附反应中△H=10.76kJ/mol,表观速率常数k298=1.223×10-4s-1,表观活化能Ea=3.2kJ/mol.     

氨基膦酸树脂对溶液中锌的吸附研究

研究了Zn2+在氨基膦酸树脂上的吸附行为。结果表明,静态饱和吸附容量为209.2mg.g-1树脂,用2.0 mol.L-1的HCl溶液洗脱,洗脱率为98%以上;测得吸附热力学参数分别为:ΔH=8.14 kJ.mol-1,ΔG=-3.06 kJ.mol-1,ΔS=37.6 J.mol-1.K-1。等温吸附服从Freundlich吸附等温式;表观活化能Ea=14.7 kJ.mol-1,表观速率常数k298=4.26×10-5s-1;树脂功能基与Zn2+的配位比约为1∶1;并用化学和红外光谱的方法探讨了树脂对Zn2+的吸附机理。     

氨基膦酸树脂对钕(Ⅲ)的吸附性能

研究了氨基膦酸树脂对钕(Ⅲ)的吸附行为。当pH=5.70时,氨基膦酸树脂对钕(Ⅲ)的静态饱和吸附容量为199.74 mg/g,用1moL/L HCl溶液可以定量洗脱,当T=298 K时,表观吸附速率常数为1.68×10~(-4)s~(-1),吸附热力学参数△H=60.68 kJ/mol,△G=-14.91 kJ/mol,△S=253.65 J/(mol·K),等温吸附服从Freundlich曲线,氨基膦酸树脂功能基与钕(Ⅲ)的配位比为2:1。用红外光谱探讨了氨基膦酸树脂与钕(Ⅲ)的成键情况。     

氨基膦酸树脂对汞的吸附性能及其机理

研究了Hg2+在氨基膦酸树脂上的吸附行为。结果表明:静态饱和吸附容量为 581.9mg/g树脂,用0.5mol/L的HCl和0.2~0.3mol/L的EDTA洗脱,洗脱率分别为:97%和99%以上;测得吸附热力学参数分别为: △H=8.45kJ/mol,△G=-3.02kJ/mol,△S= 38.5J/mol稫。等温吸附服从Freundlich经验式;表观活化能Ea=13.6kJ/mol,表观速率常数k298=2.46×10-5/s;树脂功能基与Hg2+的配位比为1∶1;并用化学和红外光谱的方法探讨了树脂对Hg2+的吸附机理。     

大孔膦酸树脂吸附钇的研究

大孔膦酸树脂吸附钇的研究舒增年熊春华（丽水师范专科学校化学系浙江３２３０００）林峰（杭州大学化学系杭州３１００２８）关键词大孔膦酸树脂钇吸附机理中图分类号Ｏ６１４．３２２本文在ＨＡｃ－ＮａＡｃ体系中，研究了树脂吸附钇的性能及其机理，获得了诸多的结果，...     

大孔膦酯树脂吸附镱的研究

镱及镱的化合物有望成为很有发展前景的功能材料[1-3]。寻求一种有效的分离提取镱的方法显得日益重要。近年来用功能高分子吸附某些金属离子的研究比较活跃^[4-9]，然而未见有吸附镱的报道。我们尝试用大孔膦酸树脂吸附镱，就吸附的性能及机理进行了研究，均获得了良好的结果。     

珠状酚醛系氨基膦酸树脂的制备及其螯合性能

本文采用反相县浮聚合技术,以苯酚、甲醛、乙二胺为起始原料,一步反应制得珠状凝胶型、大孔型胺基树脂,进一步膦酸化后得到珠状氨基膦酸螯合树脂,小球表面光滑,颗粒均匀,对Ｃａ＾２＋和Ｃｕ＾２＋螯合容量分别达到１．３６ｍｍｏｌ／ｇ和２．３１ｍｍｏｌ／ｇ。氨基膦酸树脂对Ｃａ＾２＋的吸附可用Ｆｒｅｕｎｄｌｉｃｈ吸附等温式加以描述,Ｆｒｅｕｎｄｌｉｃｈ参数ｎ＝１．７６９,线性回归方程相关系数γ＝０．９９５８。     

大孔膦酸树脂吸附镱的研究

In this paper the sorption behavior of Yb(Ⅲ) onto the macroporous phosphonic acid resin (MPAR) is reported.Experimental results show that the statically saturated sorption capacity is 328 mg/g*resin;Yb(Ⅲ) adsorbed on MPAR can be eluted by 1mol*L-1 HCl,elution percentage is 91.5%.The apparent rate constant is k298=4.63×10-5s-1.The sorption behavior of MPAR for Yb(Ⅲ) abides the Freundlich isotherm.The themodynamic parameter of sorption:enthalpy change ΔH for Yb(Ⅲ) is 50.4kJ*mol-1.The coordination molar ratio of the functional group of MPAR to Yb(Ⅲ) is 3∶1.The bondforming conditions of MPAR for Yb(Ⅲ) is examined by IR spectrometry.     

铕在大孔膦酸树脂上的吸附行为

铕在大孔膦酸树脂上的吸附行为熊春华，吴香梅（丽水师专化学系丽水３２３０００）林峰（北京大学技术物理系北京１００８７１）关键词铕，膦酸树脂，吸附，机理稀土离子对氧的亲合力最大，并且难以利用ｆ轨道形成导致共价键增强的杂化轨道，在形成π键配合物时，则不起作...     

工业氨基三甲叉膦酸中副产物的核磁共振分析

采用多种核磁共振(NMR)技术测定了工业氨基三甲叉膦酸(ATMP)产品中副产物的分子结构，发现该物质为甲氨基二甲叉膦酸(MADMP)，它是甲醛歧化反应导致的副产物；给出了可能的反应方程式；测出了MADMP的相对含量，MADMP与ATMP摩尔比约为2。     

Studies on styrene phosphonic acid

Some properties of styrene phosphonic acid (SPA) were studied. The crystals were triclinic, witha=0.6434 nm,b=0.5842 nm,c=2.0338 nm, =96.17°, =97.33°, =79.65° andZ=4. SPA underwent a change in crystal structure at 78.8°C, the hydrocarbon network became disordered (liquid-like) at 138.5°C. Crystals melted at 148.6°C giving a cubic mesophase, then changed to an isotropic liquid at 155.6°C and at 162.13°C SPA underwent decomposition. Values for pK₁=2.15 and pK₂=7.66 were obtained at 25°C. The water solubility of SPA at several temperatures, and its interaction with surfactant micelles were determined.     

DH-2树脂对镝的吸附及机理

研究了镝离子在HD-2树脂上的吸附行为。在HAc-NaAc体系pH=6.20时吸附最佳,测得静态饱和吸附容量为356mg/g(树脂),用0.1~2.0 mol/L HC l可定量洗脱,表观速率常数k198=1.16×105s-1,表观活化能Ea=16.1kJ/mol。等温吸附服从Freun ilich经验式,吸附热力学参数△H=16.5kJ/mol,△S=58.2 J/(mol.K),△G298=-0.859kJ/mol。用化学和红外光谱等方法讨论了吸附机理。     

Insight into hydration inhibition mechanism of amino trimethylene phosphonic acid on tricalcium silicate from first-principles calculations

Although amino trimethylene phosphoric acid (ATMP) has been widely used as a retarder for Portland cement, its effect on cement hydration is poorly understood at the atomic level. In this study, we combine static calculation and ab initio molecular dynamics (AIMD) simulation to reveal the mechanism of the effect of ATMP on the initial stage of C₃S hydration from multiple perspectives, quantitatively analyze the structural reconstruction and charge migration at the ATMP/C₃S interface in the aqueous environment. By adsorbing on the surface of C₃S, ATMP occupies the adsorption site of water molecules. Compared with the pure C₃S surface, the addition of ATMP delays the hydroxylation of the C₃S surface and inhibits the formation of Ca-Ow bonds. This work gives new insights into understanding the hydration of C₃S with ATMP and offers new approach of designing new cement retarder at the molecular level.     

大孔硫脲螯合树脂吸附银的研究

本文研究了大孔硫脲螯合树脂对银(I)的吸附行为.结果表明:硫脲树脂对银离子的吸附在pH5.0 的HNO3-柠檬酸钠介质中最佳,静态饱和吸附容量为402mg·g-1树脂,用5～10%硫脲-1.0mol·L-1HCl溶液作解吸剂,二次累计解吸率达到92%;等温吸附服从Freundlich经验式;表观吸附速率常数k298=1.64×10-5s-1;吸附反应的△H=41.6kJ·mol-1;吸附物中树脂功能基与Ag(I)的配位比约为1∶ 1.     

Fast removal of methylene blue (MB) with functionalized resin

Herein, a new adsorbent was developed in order to fast and effective removal of MB from aqueous solution. For this, crosslinked maleic anhydride polymer was synthesized by copolymerization of maleic anydride (MA) with divinyl benzene (DVB) in DMF at 75?°C using a radical initiator AIBN. A new functionalized resin containing carboxylic acid groups was prepared with modification of crosslinked maleic anydride resin with 5-aminoisophthalic acid. Prepared resin was characterized with FTIR, TGA/DTA and SEM. Parameters affecting adsorption such as pH, initial dye concentration and adsorption time, and also, different isotherm and kinetic models were studied. It was observed that synthesized resin could be used to MB fast removal wide pH and concentration range very high efficiency. It was also found to be that Freundlich isotherm model (R² = 0.9993) and second order kinetic models are much more suitable for adsorption of MB. Moreover, it was also observed that synthesized resin could be used at least five times without losing its original activity.     

氨基多元膦酸水处理剂的合成及性能分析

以N.N-二甲基甲酰胺、三氯化磷为主要原料合成了氨基多元膦酸水处理剂-二甲基甲叉二膦酸.并对其缓蚀阻垢能力进行了考察.试验表明:二甲基甲叉二膦酸具有很好的缓蚀效果,在与Zn2+复配或采用预膜处理后其缓蚀性能更为优越.对碳酸钙、硫酸钙和磷酸钙具有很好的抑制能力,即使在Ca2+浓度较高体系也有较好的阻垢效果.     

Characterizing mixed phosphonic acid ligand capping on CdSe/ZnS quantum dots using ligand exchange and NMR spectroscopy

The ligand capping of phosphonic acid functionalized CdSe/ZnS core–shell quantum dots (QDs) was investigated with a combination of solution and solid‐state ³¹P nuclear magnetic resonance (NMR) spectroscopy. Two phosphonic acid ligands were used in the synthesis of the QDs, tetradecylphosphonic acid and ethylphosphonic acid. Both alkyl phosphonic acids showed broad liquid and solid‐state ³¹P NMR resonances for the bound ligands, indicative of heterogeneous binding to the QD surface. In order to quantify the two ligand populations on the surface, ligand exchange facilitated by phenylphosphonic acid resulted in the displacement of the ethylphosphonic acid and tetradecylphosphonic acid and allowed for quantification of the free ligands using ³¹P liquid‐state NMR. After washing away the free ligand, two broad resonances were observed in the liquids' ³¹P NMR corresponding to the alkyl and aromatic phosphonic acids. The washed samples were analyzed via solid‐state ³¹P NMR, which confirmed the ligand populations on the surface following the ligand exchange process. Copyright © 2015 John Wiley & Sons, Ltd.     

Synthesis and proton conductivities of phosphonic acid containing poly‐(arylene ether)s

A novel phosphonic acid containing bisphenol was successfully synthesized from phenolphthalein and m‐aminophenylphosphonic acid. A series of homo‐ and copoly‐(arylene ether)s containing phosphonic acid groups were prepared by solution nucleophilic polycondensation. These phosphonic acid containing polymers can readily be dissolved in common organic solvents, such as dimethyl sulfoxide, N‐methyl‐2‐pyrrolidinone, and N‐cyclohexylpyrrolidinone, and can be cast into tough and smooth films. The presence of phosphonic acid pendants in the poly‐(arylene ether)s was confirmed by NMR, matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry, and conductivity measurements. This is the first report on the attachment of phenylphosphonic acid groups as side chains to aromatic polyethers. These poly‐(arylene ether)s had very high glass‐transition temperatures ranging from 254 to >315 °C and high molecular weights. The conductivities of the synthesized polymers were analyzed by the Cole–Cole method, and they ranged from 10^?5 to 10^?6 Scm^?1. The synthesized polymers also exhibited good solution processability. © 2001 John Wiley & Sons, Inc. J Polym Sci Part A: Polym Chem 39: 3218–3226, 2001     

Permanent flame retardant finishing of textile materials by a photochemical immobilization of vinyl phosphonic acid

A new photochemical method for a permanent flame retardant finishing of textiles made of cotton (CO), polyamide (PA) and polyester (PET) is described. Using a mercury vapour UV lamp vinyl phosphonic acid (VPA) can be fixed durable to different fabrics made of CO, PA and PET in the presence of a cross-linking agent and a photo-initiator. After a home laundering cycle up to 50 wt% of the reaction mixture is retained on the fabrics and the absolute phosphorus content was found to be more than 2.0% in all investigated cases. The photochemically modified textiles showed high levels of flame retardant performance and passed a vertical flammability test for protective clothing.