化学转化法制备磁性阳离子交换树脂的研究

本文通过化学转化法即化学共沉淀法，分别研究了强酸性和弱酸性阳离子交换树脂的磁转化对相应所得树脂的磁性的影响，制得了磁性毫米级和微米级粒径的强酸性，弱酸性阳离子交换树脂。所得磁性树脂有磁性强，磁性物质分布均匀而且稳定，并保持树脂的原有特性。     

球形纤维素基磁性阳离子的化学转化制备及机理研究

通过正交设计实验确定了用化学转化法制备球形纤维素基磁性阳离子交换树脂的最佳条件,即:将树脂在室温下浸渍于摩尔比为1∶2的Fe3 与Fe2 混合铁盐溶液中90min,然后,加入2mol/L的NaOH溶液,在搅拌下转化20min,Fe3 、Fe2 将转化为FeFe2O4并将均匀的分布在树脂的表面及大孔结构中,从而获取磁性树脂.并初步探讨了阳离子交换树脂磁化的机理.     

球形纤维素磁性阴离子交换树脂的化学转化制备及特性研究

自制了大孔球形纤维素基阴离子交换树脂(PSC-AN),并利用化学转化法成功制备了大孔球形纤维素基磁性阴离子交换树脂(PSC-MAN)。对影响树脂质量磁化率的几个主要因素进行了探讨,实验确定最佳制备条件为:铁盐的配比为1∶10,EDTA的浓度为0.005 mol/L。对树脂的结构和性能进行了研究,表明化学转化法制备大孔球形纤维素基阴离子交换树脂(PSC-MAN)磁性强,在碱液中相当稳定,树脂磁化前后交换容量分别为Q前=1.33 meq/g、Q后=1.16 meq/g,即树脂基的交换容量基本不受磁化过程的影响。     

载镍炭化树脂催化剂的制备—树脂预处理及交换对碳化树脂表面性…

球形炭化树脂作为催化剂载体具有许多独特的优点，为炭素材料催化剂开拓了新的前景。在诸多炭化树脂催化剂的制备方法中，离子交换－炭化法具有许多优点，是重要的制备方法之一。本文从Ｄ１５２大孔弱酸阳离子交换树脂为前驱载体，用不同的预处理方法先制成钙型Ｄ１５２酸阳离子交换树脂为前驱载体，用不同的预处理方法先制成钙型Ｄ１５２树脂，然后同Ｎｉ的ＮＨ３－ＮＨ＾＋４水溶液、乙醇水溶液进行离子交换，再经炭化后制成了高分     

双柱吸附法对莲子心总碱的分离纯化研究

研究了大孔吸附树脂和阳离子交换树脂双柱吸附法对莲心碱、异莲心碱和甲基莲心碱的吸附行为。利用阳离子交换树脂D72制备出莲心碱、异莲心碱和甲基莲心碱,含量分别为10.6%、10.6%和28.0%,总含量为49.2%的莲子心总碱提取物,其中杂质主要是水溶性较大的生物碱成分。利用AKS-W大孔吸附树脂能去除极性较大的生物碱,而D72阳离子交换树脂能去除非生物碱的特点,采用双柱联合吸附法,制备出3种吸附质含量分别为33.1%、15.0%和34.5%,总含量为82.6%的莲子心总碱提取物。     

交联蚕蛹壳聚糖-谷氨酸阳离子交换树脂的制备

交联蚕蛹壳聚糖-谷氨酸阳离子交换树脂的制备;蚕蛹; 壳聚糖; L-谷氨酸; 阳离子交换树脂     

镧离子掺杂的聚苯乙烯阳离子交换树脂碳化产物的组成,结构和？…

制备了Ｌａ＾３＋掺杂的聚苯乙烯阳离子交换树脂，对其进行碳化处理３，分析了树脂碳化产物的组成和结构，并进一步考察了树脂碳化产物作为二次锂离子电池碳电极材料的电化学行为。Ｌａ＾３＿掺杂的聚苯乙烯阳离子交换树脂碳化产物与相同处理条件下的未掺杂离子的树脂碳化样品相比，３种非Ｃ元素，Ｈ，Ｏ，２的含量都发生了明显的变化，其中，ＨＯ，含量有所提高，而含量则有所降低。Ｌａ＾３＋掺杂的聚苯乙烯阳离子交换树脂在碳化过     

聚苯乙烯磁性树脂的合成及性能

用悬浮聚合法,将γ—Fe_2O_3加入苯乙烯和二乙烯苯(DVB)中可制得聚苯乙烯磁性树脂。本文详细研究了各种因素对合成的影响。实验制得一批典型树脂的磁粉含量为12.8％,粒度为80目。磺化后得到磺酸型阳离子交换树脂,其交换容量为3.22mmol/g—R。实验表明,该种磁性树脂有一定的磁化性能,且耐碱性较好。     

一种用于色谱分离的凝胶型苯乙烯系阳离子树脂的制备方法

<正>公开号:CN103433010A公开日:2013.12.11申请人:凯瑞化工股份有限公司摘要本发明提供一种用于色谱分离的凝胶型苯乙烯系阳离子树脂的制备方法,选用凝胶型苯乙烯系阳离子交换树脂生产标准工艺配方中的升温方法及反应时间,生产出苯乙烯系聚合白球,然后在磺化时于硫酸中加入螯合剂及氟硼酸,经标准工艺磺化反应可得色谱分离树脂。相对于磺化时未加入螯合剂和氟硼酸的凝胶型苯乙烯系阳离子交换树脂,本发明制备色谱分离树脂吸附能力可提高50%;机械强度可提高20%。本发明制备的色谱分离树脂可提高果糖的含量,     

改性阳离子交换树脂的制备、表征及催化合成双酚F

用浸渍法制备了改性阳离子交换树脂,通过红外光谱、热重分析和扫描电镜等对其进行了分析,探讨了不同改性树脂对以苯酚和甲醛为原料催化合成双酚F收率的影响。当等摩尔比Al Cl3和Ti Cl4加入总量为树脂质量的8%,反应温度为80℃,改性时间为10h,Al Cl3-Ti Cl4改性阳离子交换树脂催化合成双酚F,其收率高达90.02%,比未改性或Al Cl3单独改性树脂的催化效果都好,其重复利用率也优于后两者。结果说明,Al Cl3-Ti Cl4改性阳离子交换树脂催化性能好,是一种环境友好高效合成双酚F的催化剂。     

磁性离子交换树脂连续化运行条件的研究

本文针对现行离子交换操作过程和离子交换树脂的不足,研制出一种新磁性离子交换树脂,并对其应用于连续化子离子交换过程的运行条件进行了较详细的研究,结果表明,磁性离子交换树脂应用于连续化操作过程,可增大操作流速或提高工作效率。     

Preparation of magnetic anion exchange resin and their adsorption kinetic behavior of reactive blue

Magnetic anion exchange resin(MD-1) was prepared from quaternization of magnetic copolymeric resin(glycidyl methacrylate -eo-divinylbenzene).For comparison,magnetic resin MD-0 without quaternization and non-magnetic resin(D-1) were also synthesized for the adsorption process.It was found that the adsorption was mainly contributed to the chemical interaction between quaternary ammonium groups and reactive blue RXHC.Due to the smaller size,MD-1 had faster adsorption and desorption kinetics than D-1.Coupled with the advantage of easy separation,the magnetic anion exchange resin was considered to be superior to common anion exchange resin in removal of reactive dye.     

磁性树脂基复合材料的研究进展

综合磁性树脂基复合材料的研究现状,着重介绍了磁性树脂基复合材料的三大类：粘结磁体、磁性高分子微球和磁性离子交换树脂的最新发展和研究状况。     

Efficient adsorption and desorption of Cu2+ by a novel acid-resistant magnetic weak acid resin

A novel magnetic weak acid resin NDMC-1 was prepared in the presence of methyl acrylate（MA）,divinylbenzene（DVB） and titanate coupling agent（TCA） coated 7-Fe₂O₃ particles.To evaluate the adsorption of Cu²⁺ on the obtained resin NDMC-1,another two magnetic resins NDMC-0（the precursor of NDMC-1 without hydrolyzation） and NDMO-l（the synthesized weak acid resin using oleic acid coatedγ-Fe₂O₃） were chosen for comparison.The results showed that the carboxyl groups were formed after hydrolyzation,and NDMC-1 exhibited a greater adsorption capacity to Cu²⁺.The desorption experiment demonstrated that the desorption ratio at pH 2（95.14%） was greatly higher than pH 3（25.97%）.Moreover,the magnetic resin NDMC-1 was proved to be stable at pH 2,extending the application of magnetic materials which were always considered to be acid-nonresistant.     

Magnetic alteration of crystallite alignment converting powder to a pseudo single crystal

The powder crystallites of L-alanine, selected for demonstration purposes, suspended in a photocurable resin were subjected to a frequency-modulated rotating magnetic field, and the achieved three-dimensional alignment was fixed by photopolymerization of the resin. The obtained sample exhibited the X-ray diffraction pattern that was comparable to the pattern of an equivalent actual original single crystal. This was achieved for the first time by the simultaneous alignment of the two magnetic axes, i.e., the easy and hard magnetization axes with respect to the space coordinates. A theoretical estimation indicates that a better alignment of the sample can be obtained if the sample preparation conditions are improved.     

Merrifield树脂负载咪唑基离子液体磁性微球的制备与表征

制备了Merrifield树脂负载丙酸甲酯基咪唑基离子液体磁性微球。 采用FT-IR和XRD对结构进行了表征,采用TGA和VSM分别进行了热稳定性和磁性测试。 结果表明,丙酸甲酯基咪唑基离子液体成功负载到Merrifield树脂微球上,并通过共沉淀的方法实现了微球的磁性化,其磁组分为FeOOH和γ-Fe2O3混合物。 磁性微球的热稳定性优于无磁性的Merrifield树脂负载丙酸甲酯基咪唑基离子液体微球,在200 ℃以下不发生分解。 磁性微球的磁化强度为11.364 emu/g,显示出超顺磁性,无外磁场存在时不发生团聚。 沉降实验结果表明,在磁感应强度为3.0×10-4 T电磁场作用下,磁性微球10 s内即可从水相中基本分离完全,而没有磁场作用时磁性微球粒子基本不从水相中分离。     

Synthesis and Characterization of Silver Nanoparticle Modified 3-Aminophenol Resin Microspheres with Application for Determination of Carcinoembryonic Antigens by Surface-Enhanced Raman Scattering

Uniform phenolic resin microspheres were prepared by the polycondensation of 3-aminophenol and formaldehyde. On the surface of the 3-aminophenol resin microspheres, silver nanoparticles were synthesized in situ and immobilized by simple heating. The composite was employed as a substrate for surface-enhanced Raman scattering (SERS). The SERS enhancement factor was evaluated using 4-mercaptobenzoic acid and Nile blue A as signal molecules. A highly sensitive SERS immunoassay that combined labeled antibody conjugated silver nanoparticle modified 3-aminophenol resin microspheres and coating antibody conjugated magnetic nanoparticles was fabricated to determine carcinoembryonic antigen. A linear relationship was obtained between the Raman intensity and the concentration of carcinoembryonic antigen. The limit of detection was 1.2 picograms per milliliter at a signal-to-noise ratio of three. This is believed to be the first report of a SERS immunoassay using silver nanoparticle modified 3-aminophenol resin microspheres as substrates.     

Synthesis,characterization and applications of coordination polymers of Ln(III)

The resin was synthesized by condensation of 2‐hydroxy‐4‐ethoxybenzophenone with 1,4‐butane diol in presence of polyphosphoric acid as a catalyst at 155 °C for 10 h. The synthesized resin was used to get polychelates of 4f‐block elements. The resin and its polychelates were characterized on the basis of elemental analyses, electronic spectra, magnetic susceptibilities, FTIR, NMR and thermogravimetric analyses. Morphological study of resin and polychelates were carried out by scanning electron microscope. The number average molecular weight (M?_n) was determined using a vapor pressure osmometry method. The catalytic activity of selected polychelates was examined for organic synthesis. It is observed from the study that polychelates give excellent results. They were found to be efficient and effective catalysts and antimicrobial agents. Copyright © 2008 John Wiley & Sons, Ltd.