大孔球形纤维素阴离子交换树脂PSC-AN对蛋白质的吸附性能研究CSCD

以自制的大孔球形纤维素阴离子交换树脂PSC-AN为吸附剂,以牛血清白蛋白(BSA)为目标蛋白,考察了该阴离子交换树脂对BSA的吸附性能,发现其对BSA的饱和吸附量为204.4 mg/m L,吸附行为满足Freundlich方程,建立了大孔球形纤维素吸附树脂PSC-AN吸附测定水中牛血清白蛋白含量的方法。     

大孔球形纤维素缬氨酸衍生物PSCE-AD的制备及鉴定

以自制的大孔球形纤维素为原料,经环氧氯丙烷活化后,与L-缬氨酸反应制得了大孔球形纤维素缬氨酸衍生物PSCE-AD,并对其结构和性能进行研究。结果表明,所制得的树脂粒径均匀、球形规则、来源广泛、制备简单,可作为一种交换剂使用。     

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上海慧运实业有限公司可供产品(代办托运) 丙烯醇 日本产 强酸阳离子交换树脂 001×7 强酸阳离子交换树脂 734 强酸阳离子交换树脂 001(大比重) 强酸大孔阳离子交换树脂 D001 弱酸大孔阳离子交换树脂 D113 弱酸酚醛树脂 112 强碱阴离子交换树脂 201×7 强碱阴离子交换树脂 711 强碱阴离子交换树脂 714 强碱大孔阴离子交换树脂 D201 强碱大孔阴离子交换树脂 D202 强碱大孔阴离子交换树脂 D208 弱碱大孔阴离子交换树脂 D301 弱碱大孔阴离子交换树脂 D301G 弱碱大孔阴离子交换树脂 D308 弱碱大孔阴离子交换树脂 D311 弱碱大孔阴离子交换树脂 D318     

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上海慧运实业有限公司可供产品(代办托运) 丙烯醇 日本产 强酸阳离子交换树脂 001×7 强酸阳离子交换树脂 734 强酸阳离子交换树脂 001(大比重) 强酸大孔阳离子交换树脂 D001 弱酸大孔阳离子交换树脂 D113 弱酸酚醛树脂 112 强碱阴离子交换树脂 201×7 强碱阴离子交换树脂 711 强碱阴离子交换树脂 714 强碱大孔阴离子交换树脂 D201 强碱大孔阴离子交换树脂 D202 强碱大孔阴离子交换树脂 D208 弱碱大孔阴离子交换树脂 D301 弱碱大孔阴离子交换树脂 D301G 弱碱大孔阴离子交换树脂 D308 弱碱大孔阴离子交换树脂 D311 弱碱大孔阴离子交换树脂 D318     

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上海慧运实业有限公司可供产品(代办托运) 丙烯醇 日本产 强酸阳离子交换树脂 001×7 强酸阳离子交换树脂 734 强酸阳离子交换树脂 001(大比重) 强酸大孔阳离子交换树脂 D001 弱酸大孔阳离子交换树脂 D113 弱酸酚醛树脂 112 强碱阴离子交换树脂 201×7 强碱阴离子交换树脂 711 强碱阴离子交换树脂 714 强碱大孔阴离子交换树脂 D201 强碱大孔阴离子交换树脂 D202 强碱大孔阴离子交换树脂 D208 弱碱大孔阴离子交换树脂 D301 弱碱大孔阴离子交换树脂 D301G 弱碱大孔阴离子交换树脂 D308 弱碱大孔阴离子交换树脂 D311 弱碱大孔阴离子交换树脂 D318     

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上海慧运实业有限公司可供产品(代办托运) 丙烯醇 日本产 强酸阳离子交换树脂 001×7 强酸阳离子交换树脂 734 强酸阳离子交换树脂 001(大比重) 强酸大孔阳离子交换树脂 D001 弱酸大孔阳离子交换树脂 D113 弱酸酚醛树脂 112 强碱阴离子交换树脂 201×7 强碱阴离子交换树脂 711 强碱阴离子交换树脂 714 强碱大孔阴离子交换树脂 D201 强碱大孔阴离子交换树脂 D202 强碱大孔阴离子交换树脂 D208 弱碱大孔阴离子交换树脂 D301 弱碱大孔阴离子交换树脂 D301G 弱碱大孔阴离子交换树脂 D308 弱碱大孔阴离子交换树脂 D311 弱碱大孔阴离子交换树脂 D318 各类牌号大孔吸附树脂 地址:上海武夷路697号     

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上海慧运实业有限公司可供产品(代办托运) 丙烯醇 日本产 强酸阳离子交换树脂 001×7 强酸阳离子交换树脂 734 强酸阳离子交换树脂 001(大比重) 强酸大孔阳离子交换树脂 D001 弱酸大孔阳离子交换树脂 D113 弱酸酚醛树脂 112 强碱阴离子交换树脂 201×7 强碱阴离子交换树脂 711 强碱阴离子交换树脂 714 强碱大孔阴离子交换树脂 D201 强碱大孔阴离子交换树脂 D202 强碱大孔阴离子交换树脂 D208 弱碱大孔阴离子交换树脂 D301 弱碱大孔阴离子交换树脂 D301G 弱碱大孔阴离子交换树脂 D308 弱碱大孔阴离子交换树脂 D311 弱碱大孔阴离子交换树脂 D318 各类牌号大孔吸附树脂 地址:上海武夷路697号五溪商务中心511室     

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上海慧运实业有限公司可供产品(代办托运)丙烯醇 日本产强酸阳离子交换树脂 001×7强酸阳离子交换树脂 734强酸阳离子交换树脂 001(大比重)强酸大孔阳离子交换树脂 D001弱酸大孔阳离子交换树脂 D113弱酸酚醛树脂 112强碱阴离子交换树脂 201×7强碱阴离子交换树脂 711强碱阴离子交换树脂 714强碱大孔阴离子交换树脂 D201强碱大孔阴离子交换树脂 D202强碱大孔阴离子交换树脂 D208弱碱大孔阴离子交换树脂 D301弱碱大孔阴离子交换树脂 D301G弱碱大孔阴离子交换树脂 D308弱碱大孔阴离子交换树脂 D311弱碱大孔阴离子交换树脂 D318各类牌号大孔吸附树脂地址:上海武夷路697号     

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上海慧运实业有限公司可供产品(代办托运)丙烯酸 日本产强酸阳离子交换树脂 001×7强酸阳离子交换树脂 734强酸阳离子交换树脂 001(大比重)强酸大孔阳离子交换树脂 D001弱酸大孔阳离子交换树脂 D113弱酸酚醛树脂 112强碱阴离子交换树脂 201×7强碱阴离子交换树脂 711强碱阴离子交换树脂 714强碱大孔阴离子交换树脂 D201强碱大孔阴离子交换树脂 D202强碱大孔阴离子交换树脂 D208弱碱大孔阴离子交换树脂 D301弱碱大孔阴离子交换树脂 D301G弱碱大孔阴离子交换树脂 D308     

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上海慧运实业有限公司专业销售(代办托运)丙烯醇 日本产强酸阳离子交换树脂 001×7强酸阳离子交换树脂 734强酸阳离子交换树脂 001(大比重)强酸大孔阳离子交换树脂 D001弱酸大孔阳离子交换树脂 D113弱酸酚醛树脂 112强碱阴离子交换树脂 201×7强碱阴离子交换树脂 711强碱阴离子交换树脂 714强碱大孔阴离子交换树脂 D201强碱大孔阴离子交换树脂 D202强碱大孔阴离子交换树脂 D208弱碱大孔阴离于交换树脂 D301弱碱大孔阴离子交换树脂 D301G弱碱大孔阴离子交换树脂 D308弱碱大孔阴离子交换树脂 D311弱碱大孔阴离子交换树脂 D318     

Relationships between the synthesis conditions and the characteristics of anion exchangers

Several macroporous styrene–divinylbenzene copolymers were prepared using different diluents. The copolymers were chloromethylated with monochlor methyl ether and aminated with N,N-dimethyl-2-hydroxyethylamine in order to perform strongly basic anion exchanger, type II. It was established that the network morphology of anion exchanger determines its ion-exchange rate. It was, also established, by means of transmission electron microscopy, that chloromethylation reaction led to the morphological changes in the macromolecular network of the copolymers.     

季铵化改性PSA的结构与性能研究

通过氯甲基化反应,制得了氯甲基化聚芳砜酰胺(CMPSA),并研究了聚芳砜酰胺(PSA)氯甲基化反应的影响因素。用流延法制成CMPSA膜,将CMPSA膜通过季铵化反应、离子交换制得了季铵化聚芳砜酰胺(QAPSA)阴离子交换膜。利用FT-IR和1H-NMR对其进行结构表征。并测定了QAPSA膜的离子交换容量(IEC)、离子电导率、吸水率和溶胀度。结果表明,QAPSA阴离子交换膜在室温下离子电导率为1.025×10-2S/cm,且具有良好的尺寸稳定性。     

Purification of glycerol/water solutions from biodiesel synthesis by ion exchange: sodium and chloride removal. Part II

BACKGROUND: Equilibrium studies were carried out with the aim of finding the basic design parameters for ion exchange plants using a glycerol phase obtained from biodiesel production. The uptake of sodium and potassium ions on a strongly acidic ion exchanger, Amberlite IR‐120, in the proton form from glycerol/water mixtures has been studied. The effect on the selectivity towards sodium of the percentage of water in glycerine/water mixtures on the macroporous resin Amberlite 252 has been analyzed. Finally, chloride removal by a strongly basic anionic‐exchange resin Amberlite IRA‐420 at three different temperatures has been studied. RESULTS: The strongly acidic ion exchanger Amberlite IR‐120 exhibits higher selectivity for potassium versus sodium ions. The ideal mass action law model was able to fit the experimental equilibrium data. The equilibrium data obtained at different percentages of water in the glycerine/water mixture indicate that as the water content increased the resin selectivity for sodium uptake is reduced. The selectivity of the anion exchange resin Amberlite IRA‐420 for chloride ions decreases with temperature. The ideal mass action law was accurate enough to fit the equilibrium data of the three systems and allowed the equilibrium thermodynamic properties to be obtained. CONCLUSIONS: These results confirm that macroporous resin Amberlite 252 could be a good choice to remove sodium ions from glycerol/water solutions with a high salt concentration and also that a strongly basic anionic‐exchange resin could be used for chloride removal. Copyright © 2009 Society of Chemical Industry     

阴离子交换剂DEAE-Spherodex M的蛋白质吸附性能

通过间歇吸附实验,采用Langmuir等温方程和改进的平行扩散模型,研究了牛血清白蛋白和γ 球蛋白在阴离子交换剂DEAE SpherodexM中的静态和动态吸附行为,分析了吸附过程的热力学参数。研究发现,阴离子交换剂的吸附平衡是吸热反应,对于较宽分子尺寸范围的蛋白质,DEAE SpherodexM均具有较高的离子交换吸附速率。研究表明,DEAE SpherodexM具有较好的机械强度、化学和热稳定性、稳定的功能基、较高的交换容量和较快的离子交换速度,是一种较好的蛋白质分离介质。     

Sorption of organic compounds on strong basic macroporous anion exchangers

The behavior of various strong basic type II macroporous anion exchangers against the sorption of some organic acid alkaline salts as follows: natrium benzoate, natrium benzenesulfonate, potassium α-naphthylacetate, natrium β-naphthalenesulfonate, and natrium anthraquinone-2-sulfonate was established. The values of the sorption capacities depend on the morphology of anion exchanger network, the type and the size of organic anion, as well as the type of anion exchanger.     

燃料电池用碱性阴离子交换膜的研究进展

碱性阴离子交换膜(AAEM)是碱性阴离子交换膜燃料电池(AAEMFC)的核心部件,起到阻隔阴阳两极和传导OH-的双重作用,其性能好坏直接影响到AAEMFC的性能和使用寿命。从膜的结构和制备方法分类,综述了碱性阴离子交换膜燃料电池用有机-无机杂化膜、掺杂型膜及均相膜的特性和研究现状。     

Synthesis and Characterization of Anionic Exchange Resins with a Gradient in Polymer Composition for the PS-co-DVB/PDEAMA-co-DVB System

Summary Anionic exchange resins with a gradient in polymer composition were prepared in two stages. After P(S-co-DVB) suspension beads were obtained, N,N-diethylaminoethyl methacrylate monomer was let to diffuse into the beads at 25 °C, and immediately photopolymerized to fix the gradient polymer composition with high surface concentration of ion exchanger. Chemical composition through the radial position was estimated by means of a mathematical algorithm and using UV spectroscopy. Resin characterization included particle size distribution, “settled” density and total anion exchange capacity, following ASTM D-2187. Values were compared with a porous commercial resin (Amberlite IRA900RF Cl). Since non porous structure with high ion exchange capacity resins were obtained, useful resins for ion exchange with long term stability can be prepared with this methodology.     

多臂腰果酚基光敏树脂的合成及其性能研究

设计合成了一种新型多臂腰果酚基光敏树脂。首先,以羟乙基腰果酚醚（ HCE）和高甲醚化三聚氰胺甲醛树脂（ HMMM）为原料,利用醚交换反应合成了一种具有“硬核软臂”结构的预聚体（HF）。采用一步法反应对 HF进行了丙烯酸化,合成了多臂腰果酚基光敏丙烯酸树脂（ AHF）。采用傅里叶变换红外光谱仪（ FT-IR）、核磁共振谱仪（ NMR）对 HF和 AHF结构进行了表征,结果表明：光敏树脂被成功合成。此后,利用所合成的树脂 AHF制备了光固化涂料,研究了附着力促进剂含量等对涂层摆杆硬度、附着力、铅笔硬度和耐冲击性等性能的影响,并与商品化丙烯酸树脂 -双酚 A环氧丙烯酸酯（ RY1104）、氨基丙烯酸酯（ P170A）、聚氨酯丙烯酸酯（ 6001）、大豆油环氧丙烯酸酯（ AESO）进行了对比,结果表明：相比于几种商品化的树脂,以 AHF为基体树脂并添加 5%附着力促进剂制备的光固化涂料,铅笔硬度可达 3H,光泽、附着力和耐冲击性优异,且具有较强的拉伸强度及较高的断裂伸长率。     

Anion transport through ceramic electrodialysis membranes made with hydrated cerium dioxide

In this research, low‐cost ceramic anion‐exchange membranes have been developed from porous supports manufactured, using a chamotte as a pore former. An inorganic anion‐exchanger (hydrated cerium dioxide) has been deposited into the support and fixed by thermal treatment. The effects of some process variables (such as the temperature of the thermal treatment or the pH of the electrolyte) on the properties of the anion‐exchange membranes have been investigated. The electrochemical performance of the resulting membranes has been compared to that exhibited by ceramic anion‐exchange membranes based on another anion exchanger (hydrated zirconium dioxide) deposited into alumina‐kaolin supports. The temperature of the thermal treatment applied to fix the hydrated cerium dioxide (HCeD) does not affect the structure nor the electrochemical properties of the membranes. The porosity of the supports obtained, using a chamotte as the pore former was lower than that of the alumina‐kaolin ones, which led to a lower deposition of hydrated cerium dioxide than that obtained for hydrated zirconium dioxide (HZrD) in alumina‐kaolin supports. The higher porosity registered for the HZrD‐based membrane also implies higher membrane conductivities. The selective transport of anions through the membranes was enhanced by increasing the number of infiltrating steps, as confirmed from current to voltage curves. However, this behavior was only apparent at acidic or neutral pH, thus confirming the amphoteric character of the anion‐exchanger. Comparing the γ parameter (equivalents of ion exchanger per gram of deposited oxide), it is concluded that the porosity of the ceramic supports, consequence of their distinct microstructure, is the main parameter responsible for the difference in the ion‐exchange capacity obtained for HZrD and HCeD membranes. Consequently, the CeO₂ particles used in this work are also good candidates to impart ion‐exchange properties to microporous ceramic supports.