A series of aminated chitosan microspheres were prepared from chitosan,and then an affinity dye-ligand,Cibacron Blue F3GA,was covalently coupled.The maximum attachment of cibacron blue F3GA was 494 μmol/g.Albumin ads...A series of aminated chitosan microspheres were prepared from chitosan,and then an affinity dye-ligand,Cibacron Blue F3GA,was covalently coupled.The maximum attachment of cibacron blue F3GA was 494 μmol/g.Albumin adsorption onto cibacron blue F3GA-attached chitosan microspheres was investigated.The human serum albumin (HSA) equilibrium adsorption capacity was 79.8 mg/g (wet beads).The adsorption equilibrium isotherms appeared to follow a typical Langmuir isotherm.The highest desorption ratio (100%) was achieved by using an eluent of 1.0 mol/L NaSCN (pH 8.0).The cibacron blue F3GA-attached chitosan microspheres could be reused without significant decreases in the adsorption capacities.展开更多
Started from the liver targeting compounds（glycyrrhizin,glycyrrhetinicacid,bile acid）,six（amine-terminated） compounds were prepared via two-step reactions.The NMR experiments provided the direct evidence of the ex...Started from the liver targeting compounds（glycyrrhizin,glycyrrhetinicacid,bile acid）,six（amine-terminated） compounds were prepared via two-step reactions.The NMR experiments provided the direct evidence of the existence of amide.The polymers were synthesized by polymerizing of BLG-NCA initiated by each of six amine-terminated compounds.The liver targeting group was introduced to the main chain of the polymer.The molecular weight of the resultant polymers was adjusted by changing the molar ratio of monomer BLG-NCA to initiator.The product structure was characterized by GPC,FTIR and（）1H NMR.The results demonstrate that amine-terminated compounds containing liver targeting group could initiate the polymerization of BLG-NCA.展开更多
工业二乙烯苯悬浮聚合制备的大孔树脂,在二氯乙烷溶剂中以无水三氯化铁为催化剂进行悬挂双键后交联反应,得到的后交联树脂的比表面积和孔容都有显著增加.低温氮气吸附/脱附等温线得到的孔径分布曲线证明初始共聚物PDT-55(polydivinylben...工业二乙烯苯悬浮聚合制备的大孔树脂,在二氯乙烷溶剂中以无水三氯化铁为催化剂进行悬挂双键后交联反应,得到的后交联树脂的比表面积和孔容都有显著增加.低温氮气吸附/脱附等温线得到的孔径分布曲线证明初始共聚物PDT-55(polydivinylbenzene,toluene as porogen)和PDH-55(polydivinylbenzene,heptane andtoluene as porogen)经后交联反应,所形成的新孔以微孔为主.树脂对水溶液中苯酚和维生素B12(VB12)的静态吸附研究发现树脂经后交联后,对苯酚的吸附量有显著提高,但对VB12的吸附量增加不大,原因是分子尺寸较大的VB12无法进入由悬挂双键后交联反应所形成的微孔.树脂PDT-55pc对苯酚的吸附量大于商品树脂XAD-4;后交联前后树脂PDT-55、PDT-55pc(post-crosslinking of PDT-55)、PDH-55、PDH-55pc(post-crosslinking ofPDH-55)对VB12的吸附量均大于树脂XAD-4.在本研究的实验条件下,Langmiur和Freundlich吸附等温线方程能很好地拟合树脂对水溶液中苯酚和VB12的吸附,相关系数在0.99以上.静态吸附动力学实验结果表明后交联前后树脂对苯酚的吸附较VB12更容易达到吸附平衡.吸附动力学数据的拟合结果显示,McKay二级吸附动力学模型符合树脂对苯酚的吸附,而对VB12的吸附更符合Lagergren一级吸附动力学模型.展开更多
文摘A series of aminated chitosan microspheres were prepared from chitosan,and then an affinity dye-ligand,Cibacron Blue F3GA,was covalently coupled.The maximum attachment of cibacron blue F3GA was 494 μmol/g.Albumin adsorption onto cibacron blue F3GA-attached chitosan microspheres was investigated.The human serum albumin (HSA) equilibrium adsorption capacity was 79.8 mg/g (wet beads).The adsorption equilibrium isotherms appeared to follow a typical Langmuir isotherm.The highest desorption ratio (100%) was achieved by using an eluent of 1.0 mol/L NaSCN (pH 8.0).The cibacron blue F3GA-attached chitosan microspheres could be reused without significant decreases in the adsorption capacities.
文摘Started from the liver targeting compounds（glycyrrhizin,glycyrrhetinicacid,bile acid）,six（amine-terminated） compounds were prepared via two-step reactions.The NMR experiments provided the direct evidence of the existence of amide.The polymers were synthesized by polymerizing of BLG-NCA initiated by each of six amine-terminated compounds.The liver targeting group was introduced to the main chain of the polymer.The molecular weight of the resultant polymers was adjusted by changing the molar ratio of monomer BLG-NCA to initiator.The product structure was characterized by GPC,FTIR and（）1H NMR.The results demonstrate that amine-terminated compounds containing liver targeting group could initiate the polymerization of BLG-NCA.
文摘工业二乙烯苯悬浮聚合制备的大孔树脂,在二氯乙烷溶剂中以无水三氯化铁为催化剂进行悬挂双键后交联反应,得到的后交联树脂的比表面积和孔容都有显著增加.低温氮气吸附/脱附等温线得到的孔径分布曲线证明初始共聚物PDT-55(polydivinylbenzene,toluene as porogen)和PDH-55(polydivinylbenzene,heptane andtoluene as porogen)经后交联反应,所形成的新孔以微孔为主.树脂对水溶液中苯酚和维生素B12(VB12)的静态吸附研究发现树脂经后交联后,对苯酚的吸附量有显著提高,但对VB12的吸附量增加不大,原因是分子尺寸较大的VB12无法进入由悬挂双键后交联反应所形成的微孔.树脂PDT-55pc对苯酚的吸附量大于商品树脂XAD-4;后交联前后树脂PDT-55、PDT-55pc(post-crosslinking of PDT-55)、PDH-55、PDH-55pc(post-crosslinking ofPDH-55)对VB12的吸附量均大于树脂XAD-4.在本研究的实验条件下,Langmiur和Freundlich吸附等温线方程能很好地拟合树脂对水溶液中苯酚和VB12的吸附,相关系数在0.99以上.静态吸附动力学实验结果表明后交联前后树脂对苯酚的吸附较VB12更容易达到吸附平衡.吸附动力学数据的拟合结果显示,McKay二级吸附动力学模型符合树脂对苯酚的吸附,而对VB12的吸附更符合Lagergren一级吸附动力学模型.
