聚偏氟乙烯中空纤维血液透析器的研究

Objective Currently applied membrane materials for hemodialysis are mainly polysulfone and polyethers. However, defects still remain in the removal of β2-MG and biocompatibility. Polyvinylidene fluoride (PVDF) has not been put in use in hemodialysis. This study focused on the evaluation of mechanics performance and the dialysis performance of PVDF membrane material. Methods PVDF hollow fiber membranes were spun by changing the membrane forming conditions. The membranes were sealed to dialyzers by centrifugal moulding method. The simulation solution, instead of patient blood, was used to evaluate the dialysis performance of PVDF hollow fiber membrane dialyzers. Results The tensile failure strength of PVDF membrane was about 20 cN. The tensile elongation of PVDF membrane was about 200%. The clearance rates of the dialyzers prepared with the fiber whose wall thickness was 30μ m to urea and lysozyme were 90% and 75%, separately,while the rejection to BAS reached 90% above. With the mass content of (polyethylene glycol, PEG) was 19%,the rejection rate of bovine serum was 91%, which was higher than that with the PEG mass content of 22%. When the flow velocity of dialysis fluid was increased, the clearance rate of urea and lysozyme was improved, but the rejection of BAS was not much affected. Conclusion The results show that the mechanics performance can satisfy the demand of dialysis. The clearance rate of urea and lysozyme has greatly improved. The retention of bovine serum albumin by using PVDF dialyzers is ideal. The PVDF can be exploited as a new membrane material.     

惰性粒子循环流化床蒸发器浓缩大黄浸提液

研究了惰性粒子循环流化床蒸发器浓缩中药大黄浸提液时的传热及防、除垢性能，给出了管内沸腾传热系数经验关联式。对影响传热性能的一些主要因素进行了分析。研究结果表明：惰性粒子循环流化床蒸发器存中药浸提液浓缩中具有一定的应用前景。     

聚偏氟乙烯中空纤维血液透析器的研究

目的 目前,用于血液透析的膜材料主要有聚砜和聚醚砜,在去除β2-微球蛋白及生物相容性方面尚存在缺陷.聚偏氟乙烯(PVDF)在血液透析方面尚无应用,本研究对PVDF膜材料进行了力学性能及血液透析性能的评价.方法 采用干-湿相转化法制备PVDF中空纤维膜;采用离心浇铸法将中空纤维膜封装成血液透析器,用实验室配制的模拟液代替...