正交优化载药超高分子量聚乙烯药物分散及性能

Optimization on the dispersion of alendronate sodium in drug-loaded UHMWPE by orthogonal design

应用正交设计法选取阿仑膦酸钠(ALN)加入超高分子量聚乙烯(UHMWPE)后均匀分散的最佳工艺参数,运用社会科学统计软件包(SPSS)对正交实验结果进行极差与方差分析,在最佳工艺参数下制备ALN/UHMWPE,通过拉伸力学性能实验、XRD、DSC、SEM及EDS表征样品性能。由正交实验得出ALN加入后均匀分散最佳工艺条件:表面活性剂F68,分散方式为超声分散,ALN质量分数1%,分散温度37℃;方差分析表明,实验具有统计学意义;拉伸力学实验结果表明,表面活性剂F68的加入可以有效提高(ALN-F68)/UHMWPE拉伸强度与断裂伸长率;加入表面活性剂样品的结晶度较未加表面活性剂对照样有所提高,但均低于空白UHMWPE,ALN没有改变UHMWPE晶型及其热熔性质;加入表面活性剂有助于ALN在UHMWPE中的均匀分散。

The optimum processing conditions were determined by orthogonal design to prepare ultrahigh molecular weight polyethylene loaded with sodium alendronate （ALN/UHMWPE）. The range analysis and analysis of variance（ANOVA） of tensile strength and broken elongation were carried out by statistiacl package for the social science （SPSS）. The tensile test, XRD , DSC, SEM and EDS were used to characterize ALN/UHMWPE prepared under the optimum processing conditions. The orthogonal design combined with statistical analyses reveals that the optimal processing conditions for the uniform dispersion of ALN in UHMWPE are as follows： surfactant （F68）, ultra sonic dispersion, 1 % mass fraction of ALN and at 37 ℃. ANOVA shows a significant difference. The tensile tests indicate that both tensile strength and broken elongation of （ALN- F68）/UHMWPE increase compared with ALN/UHMWPE. The crystallinity of （ALN -FgB）/UHMWPE is slightly higher than that of ALN/UHMWPE, both of which are lower than UHMWPE. No phase or melting behavior changes resulting from ALN addition are observed. The addition of F68 leads to a more uniform distribution of ALN in （ALN - F68）/UHMWPE.