交联聚乙烯醇水凝胶对胆红素的吸附性能研究

本文采用反相聚合的方法以戊二醛为交联剂合成了珠状交联聚乙烯醇凝胶，并研究了它对胆红素的吸附性能。结果表明交联聚乙烯醇对胆红素的体外吸附率受到吸附剂的交联度、颗粒直径、溶液中白蛋白的浓度、吸附温度及离子强度的影响。该类吸附剂对胆红素具有良好的吸附动力学性能。     

St-MMA-AA三元无皂共聚胶粒作蛋白质载体的研究

以交联聚乙烯醇凝胶为载体合成了含有对氨基苯磺酸功能基的吸附剂．它们对血清中甘油三脂具有良好的吸附效果,对血清中总蛋白的吸附性能较弱．对甘油三脂的吸附性能随吸附剂功能基含量的增加而增加,随载体交联度的提高而降低．血清中致病因子的浓度影响吸附性能．     

含氨基聚甲基丙烯酸羟乙酯树脂对胆红素的吸附性能研究

以交联聚甲基丙烯酸羟乙酯树脂为载体,以己二胺和多乙烯多胺为功能基制备了一系列胆红素吸附剂,研究了它们在不同吸附温度、离子强度和胆红素浓度等条件下,对胆红素的吸附性能的影响.研究表明,该类吸附剂对胆红素具有良好的吸附性能,其中以己二胺和质子化己二胺为功能基的吸附剂对胆红素的吸附作用最佳.     

含牛磺酸交联聚乙烯醇的合成及其对甘油三脂吸附性能*

以牛磺酸修饰交联聚乙烯醇凝胶合成了吸附剂。吸附实验结果表明：该类吸附剂对血清中甘油三脂具有良好的吸附效果,而对血清中总蛋白的吸附性能相对较弱。它们对甘油三脂的吸附性能着吸附剂上功能基含量的增加而加强,但随着载体的交联度的提高而降低。血清中致病因子的浓度影响吸附性能。     

新型低密度脂蛋白吸附剂的合成及吸附性能研究

通过在交联聚乙烯醇水凝胶上固载牛磺酸合成了新型低密度脂蛋白吸附剂,体外吸附结果表明,该类吸附剂对低密度脂蛋白的吸附选择性与吸附率不仅与交联聚乙烯醇载体本身的交联度和牛磺酸的固载量有关,而且还受到不同病人血清及吸附剂的颗粒直径等因素的影响．该类吸附剂对血清总蛋白的影响较小．     

吸附型“人工肝”辅助材料的制备及其性能研究：（Ⅲ）SVD醇解物 …

本文介绍了大孔交联聚乙烯醇共聚物的结构性能、功能基化反应,制备了一系列质子化胺基吸附剂,发现它们对水溶液及血清中的游离和结合胆红素具有较好的吸附性能,且血液相容性良好。     

吸附型“人工肝”辅助材料的制备及其性能研究──(Ⅲ)SVD醇解物的功能基化反应及吸附性能

本文介绍了大孔交联聚乙烯醇共聚物的结构性能、功能基化反应，制备了一系列质子化胺基吸附剂，发现它们对水溶液及血清中的游离和结合胆红素具有较好的吸附性能，且血液相容性良好。     

一种新型低密度脂蛋白吸附剂的制备

通过在环氧化的交联聚乙烯醇球上固载多乙烯多胺和磺酸基团的方法制备一种新型的低密度脂蛋白吸附剂.环氧化的交联聚乙烯醇球首先与乙二胺或二乙烯三胺、三乙烯四胺及四乙烯五胺等多乙烯多胺进行胺化反应,由此获得不同长度悬臂,而后将胺化的环氧化的交联聚乙烯醇球与DMF/ClSO₃H反应,从而固载磺酸基团.磺酸基团的固载量随交联度的减小和聚乙烯醇浓度的增大而增大.初步研究证实,该类吸附剂具有较大的吸附量和较好的选择性.     

环氧化交联聚乙烯醇球的制备

由于具备优良的生物相容性及大量可以用于修饰的羟基，交联聚乙烯醇球可以用作医用吸附剂的载体。本文对交联聚乙烯醇球的制备条件进行了详细研究，并讨论了环氧基的固载条件，分析了球的交联度、单体浓度对交联聚乙烯醇珠的粒径分布、溶胀度和环氧基团固载量的影响。     

新型交联甲壳糖吸附树脂对胆红素的吸附性能研究

以天然甲壳素为原料合成了珠状高分子吸附剂，研究了吸附剂在磷酸二氢钠和磷酸氢二钠缓冲溶液中对非结合型胆红素的吸附性能，实验结果表明：交联甲壳糖吸附树脂对非结合型胆红素很好的吸附效果。     

Sol–gel synthesis of mesoporous silicas containing albumin and guanidine polymers and its application to the bilirubin adsorption

The organic–inorganic composite materials based on mesoporous silica were synthesized using sol–gel method. The surface area of silicas was modified by bovine serum albumin (BSA) and guanidine polymers: polyacrylate guanidine (PAG) and polymethacrylate guanidine. The mesoporous silicas were characterized by nitrogen adsorption–desorption analysis, Fourier transform infrared spectroscopy, transmission electron microscopy. The obtained materials were used as adsorbents for selective bilirubin removal. It was shown that the structural properties and surface area of modified materials depend on the nature of polymers. Incorporation of polymers in silica gel matrix during sol–gel process leads to the formation of mesoporous structure with high pore diameter and a BET surface area equals to 346 m²/g for SiO₂/BSA and 160 m²/g for SiO₂/PAG. Analysis of adsorption isotherms showed that modification of silica by BSA and guanidine polymers increases its adsorption ability to bilirubin molecules. According to Langmuir model, the maximum bilirubin adsorption capacity was 1.18 mg/g.     

Adsorption of Bilirubin-Albumin Complex on the Surface of Highly Dispersed Silica

The interaction of bilirubin with albumin in aqueous buffer solutions is studied and the stability constants of the formed complex are determined. The adsorption of bilirubin and albumin from their individual and mixed solutions on the surface of highly dispersed silica is studied as a function of pH and albumin concentration. It is shown that the character of the adsorption of bilirubin from solutions containing albumin changes significantly compared to the adsorption from an individual solution.     

Study of adsorption behavior of bilirubin on human-albumin monolayer using a quartz crystal microbalance

The quartz crystal microbalance was employed to study the adsorption behavior of bilirubin on human-albumin layer, which was chemically bound to the self-assembled monolayer of 4-aminothiophenol on the surface of a gold electrode of the crystal via glutaraldehyde. A long-time adsorption process of bilirubin that took place on a human-albumin-modified surface was observed, and the adsorption kinetic parameters were estimated from the in situ frequency measurements. The amount of adsorbed bilirubin increased with increasing of both hydrogen ions and bilirubin concentration and was larger than that estimated based on the conclusion that there are two affinity sites for bilirubin per albumin molecule. With the present method, the displacement of bilirubin from an albumin layer caused by aspirin was also examined. QCM measurement provides a facile method for in situ monitoring of the adsorption/desorption of bilirubin on proteins layers.     

β-环糊精交联聚合物对胆红素吸附性能的研究

考察了β-环糊精交联聚合物对胆红素的动力学吸附曲线,以及温度、pH值、胆红素初始浓度和牛血清白蛋白对去除率的影响。实验结果表明这种聚合物材料对胆红素具有较快的吸附速度,并且在较高的温度下有利于胆红素的吸附。当溶解胆红素的磷酸盐缓冲液的pH为7.8,胆红素起始质量浓度为40 mg/L时,β-环糊精聚合物对胆红素的去除率高达92.6%。随着胆红素初始质量浓度的增加,胆红素的去除率下降,但吸附量增加。     

聚甲基丙烯酸羟乙酯树脂对胆红素的吸附研究

本文通过水相悬浮聚合制备了大孔交联聚甲基丙烯酸羟乙酯（PHEMA）树脂，研究了PHEMA树脂以及用乙醇胺功能基化后的PHEMA树脂对胆红素的吸附性能。结果表明，PHEMA树脂对胆红素的吸附性能受树脂孔结构，吸附温度，离子强度以及溶液中白蛋白的影响。该类吸附剂对胆红素有良好的吸附性能，其中用乙醇胺功能基化的树脂表现出更好的吸附能力。     

血液灌流用胆红素吸附剂的吸附性能研究

胆红素是一种内源性毒素.急性肝损伤时,体内胆红素的排泄受到阻碍.如何能有效地排除高浓度的胆红素,引起了各国学者的高度重视^[1].文献^[2,3]报道,在血液净化疗法治疗高胆红素血症中,当胆红素吸附剂上含有氨基阳离子时,可以提高其对胆红素的吸附量.     

乳化液膜清除未结合胆红素

高未结合胆红素症 (Ｈｙｐｅｒｂｉｌｉｒｕｂｉｎｅｍｉａ)是新生儿常见疾病 .胆红素在血液中的浓度过高 ,会伤害婴儿的大脑 (核黄疸 ) [1].肝昏迷患者的症状与胆红素在血液中含量过高也有直接关系 ,迅速有效地将其清除可使患者症状缓解[2 ],迄今为止 ,清除胆红素的研究主要集中在以吸附剂吸附为基础的血液灌流方法 ,所用的吸附剂主要有活性炭和大孔吸附树脂 ,活性炭的吸附选择性和血液相容性都比较差 ;大孔吸附树脂的吸附选择性和血液相容性等方面有待进一步提高[3],特别是在吸附未结合胆红素时 ,清除率低、清除速度慢 ,难以满足临床方面…     

Quartz crystal microbalance studies on bilirubin adsorption on self-assembled phospholipid bilayers

Bilirubin adsorption on self-assembled phospholipid bilayers was studied using quartz crystal microbalance, and factors influencing its adsorption such as pH, temperature, and solution ionic strength were discussed in detail. The results show the amount of adsorbed bilirubin on self-assembled phospholipid bilayers is small at higher temperature and large at higher pH and solution ionic strength, and the adsorption kinetic parameter estimated from the in situ frequency measurement is (1.8+/-0.27)x10(6) M(-1) (mean +/- S.D.). With the present method, the desorption of adsorbed bilirubin caused by human serum albumin and the photoinduced decomposition of adsorbed bilirubin under light illumination were also examined. QCM measurement provides a useful method for monitoring the adsorption/desorption process of bilirubin on self-assembled phospholipid bilayers.