中极性高交联大孔吸附树脂的合成及其对绞股蓝皂甙的吸附性能

二乙烯苯分别与甲基丙烯酸甲酯、丙烯酸甲酯、顺丁烯二酸二甲酯、乙酸烯丙酯、丙烯腈、甲基乙烯基甲酮和N-乙烯基吡咯烷酮进行悬浮共聚合,制备了一系列交联度为40％的大孔吸附树脂。并表征了这些树脂的结构,测定了树脂对绞股蓝皂甙的吸附量。结果说明,所用单体的极性等因素对树脂的孔结构及吸附量有重要影响。     

大孔吸附树脂对绞股蓝皂甙的吸附研究

比较了７种大孔吸附树脂对绞股蓝皂甙的吸附性能及机理，通过对吸附树脂的孔径和比表面的研究，得出ＡＡＳＩ－２树脂是一种性能优良的吸附剂。     

低交换量大孔弱碱树脂的合成、表征及其对绞股蓝皂甙的吸附性能

为筛选适用于天然皂甙分离纯化的吸附树脂,以高交联聚苯乙烯型大孔树脂S-008(Ⅰ)为原料,经氯甲基化和胺化反应,合成了低交换量弱碱树脂(Ⅱ—Ⅴ)。然后,对其结构进行了表征,测定了它们对绞股蓝皂甙的吸附性能。结果说明,胺化试剂与反应条件影响产物树脂的结构,并进而影响产物树脂对绞股蓝皂甙的吸附性能。     

低交换量混胺树脂的合成及其对绞股蓝皂甙的吸附性能

高交联聚苯乙烯型树脂S-008(Ⅰ)氯甲基化后,以不同比例的三甲胺/二甲胺混合胺或三甲按/二乙醇胺混合胺胺化,合成了同时含有季铵和叔氨基的混胺树脂Ⅱ-Ⅺ,研究了它们对绞股蓝皂甙的吸附性能,发现树脂的比表面和极性基团对其吸附量均有明显影响,此外,这些树脂对绞股蓝皂甙呈现出一定的吸附选择性和良好的解吸选择性。     

AASI－2树脂对绞股蓝皂甙的吸附与洗脱性能

本文详尽地研究了ＡＡＳＩ—２树脂对绞股蓝皂甙的静态、动态吸附与脱附性能以及影响因素，确定了ＡＡＳＩ－２树脂最佳工作条件。并考察了其在绞股蓝皂甙生产中应用的可能性。结果表明：ＡＡＳＩ－２树脂是一优良的绞股蓝皂甙吸附剂。     

交联聚苯乙烯吸附树脂的修饰及其对天然皂甙的吸附性能

交联聚苯乙烯氯甲基化后,将氯转化为羟基、氨基、甲氧基、苯氧基、4-羟基苯氧基和4-乙酰苯氧基,合成了不同极性的吸附树脂Ⅰ—Ⅵ。同时由交联聚苯乙烯经Friedel-Crafts酰化反应在其苯环上引入乙酰基,制备了树指Ⅶ。用物理技术和化学方法表征树脂Ⅰ—Ⅶ的结构,然后测定了它们对天然皂甙如甜菊甙和绞股蓝皂甙的吸附量。结果说明,这些树脂亲水性较好,均能吸附天然皂甙,但只有中极性的酮基树脂Ⅵ和Ⅶ的吸附量较大。     

AASI—2树脂对绞股蓝皂甙的吸附与洗脱性能

本文详尽地研究了ＡＡＳＩ－２树脂对绞股蓝皂甙的静态、动态吸附与脱附性能以及影响因素，确定了ＡＡＳＩ－２树脂最佳工作条件，并考察了基在绞股蓝皂甙生产中应用的可能性。结果表明：ＡＡＳＩ－２树脂是一优良的绞股蓝皂甙吸附剂。     

表面亲水性粒度单分散交联PMMA树脂的合成及表征

用种子溶胀聚合方法 ,合成出了粒度单分散的交联聚甲基丙烯酸甲酯微球 .将微球通过水解 ,使其转化为表面带羧基的树脂 .分别用多糖化合物Dextran和DEAE Dextran对水解树脂表面进行包覆涂层 ,然后用n 丁二醇双环氧丙醚分别进行交联 ,制备出两种表面带高交联多糖覆盖层的树脂 .以两种改性树脂为填料 ,以人血清蛋白为试样 ,用HPLC方法对树脂的亲水性能进行了表征 .研究表明 ,两种改性树脂均有很好的亲水性 ,蛋白质的回收率分别在 97%和 99%以上 ,并有良好的机械强度和化学稳定性     

具有精细结构的吸附与离子交换树脂

本文论述了某些具有精细化学，物理结构的离子交换树脂和吸附树脂的特性与应用。     

THE SYNTHESIS AND CHARACTERIZATION OF SOME POROUS RESINS AND THEIR ADSORPTION PROPERTY ON STEVIA GLYCOSIDES

A series of porous resins (PYR) with different content of pyridyl group were prepared,and their physical structure and adsorption properties on the stevia glycosides were studied in detail.After the selective adsorption of PYR resins,the rebaudioside A could be separated from the other components of the stevia glycosides,and a new method for obtaining pure rebaudioside A is reported.     

SYNTHESIS AND PROPERTIES OF HIGHLY OIL-ABSORPTIVE RESIN WITH HYDROXY ETHYLACRYLATE AS POTENTIAL CROSSLINKING AGENT

1. INTRODUCTIONIn recent years, highly oil-absorptive resin was widely used in the field of treatment of oil polluted water [1,2]. Now research was focused on fibrous oil-absorptive materials for its larger absorbent area and faster absorbent rate. New hi…     

SYNTHESIS AND PROPERTIES OF HIGHLY OIL-ABSORPTIVE RESIN WITH HYDROXY ETHYLACRYLATE AS POTENTIAL CROSSLINKING AGENT

A concept of potential crosslinking agent was introduced into the synthesizing process of highly oil-absorptive resin that is traditionally prepared by single chemical crosslinking. The resin was heated after manufactured to obtain three-dimension network structure. The effects of potential crosslinking agent and the crosslinking conditions on the absorptive properties of resin were studied.The results showed that hydroxyl ethylacrylate got satisfied results, and the resin with it had good oil absorbency and oil retention.     

SYNTHESIS OF THE POLYSTYRENE-TYPE ADSORBENTS CONTAINING POLAR GROUPS AND THEIR CAPACITIES IN THE ADSORPTION OF STEVIOSIDE AND GYPENOSIDES

Seven polystyrene-type adsorbents (Ⅰ—Ⅶ) were synthesized by the modification of styrene-divinylbenzene copolymer respectively with hydroxymethyl, aminomethyl, methoxymethyl, phenoxymethyl, (4-hydroxy phenoxy)methyl, (4-acetylphenoxy)methyl, and acetyl groups. Their structures were characterized with chemical methods and physical techniques. The adsorption capacities of the adsorbents to stevioside and gypenosides were determined via batch test in which the HPLC method was used for the analysis of Saponin concentration of solution. The results showed that all the adsorbents could adsorb these saponins to a certain extent, but Ⅵ and Ⅶ had large capacities owing to their moderate polarities.     

环硫氯丙烷与氨反应合成巯基胺型螯合树脂及其吸附性能的研究

用环硫氯丙烷与氨水(或氨气)反应合成了一类新的巯基胺型螯合树脂。这类树脂对贵金属Ag(Ⅰ)、Au(Ⅲ)、pt(Ⅳ)等具有较好的吸附性能。在Ag(Ⅰ)—Cu(Ⅱ)—Zn(Ⅱ)—cd(Ⅱ)的混合溶液中,树脂只吸附Ag(Ⅰ),说明该树脂具有良好的吸附选择性。     

二环戊二烯基钛烴氧基衍生物的合成和性能研究

二环戊二烯基二氯化钛与脂肪醇的反应是非常复杂的,由于反应体系不同,所得的产物也不同,且产物又不稳定^[1-3]。