
PEI功能化中空介孔二氧化硅掺杂PLA复合膜的制备及性能研究
辛宇, 纪嘉琦, 王丽, 侯景魁, 宋立新, 王元霞, 李先亮
PEI功能化中空介孔二氧化硅掺杂PLA复合膜的制备及性能研究
Preparation and Performance Study of PLA Composite Films Doped with PEI-functionalized Hollow Mesoporous Silica
聚乳酸(PLA)是一种生物可降解聚合物,具有良好的生物相容性和生物可降解性,但其延展性差、力学性能差等缺点限制其应用范围。因此,制备聚乙烯亚胺(PEI)改性的树突状中空介孔二氧化硅微球(PEI-HMSN),通过溶液浇铸法掺杂到PLA基体中,制备复合膜PLA/PEI-HMSN,详细研究复合膜的热力学性能、光学性能和疏水性能。结果表明:PEI-HMSN能够较为均匀地分散在PLA基体中,PLA/PEI-HMSN复合膜的断裂伸长率和拉伸强度得到提高,疏水性有所提高。经PEI改性的HMSN对PLA膜的性能有提升作用,为PLA在包装领域的应用提供实验依据。
Polylactic acid (PLA) is a biodegradable polymer with good biocompatibility and biodegradability, but its poor ductility, poor air tightness and other shortcomings limit its application scope. Therefore, polyethyleneimine (PEI) modified dendritic hollow mesoporous silica microspheres (PEI-HMSN) were prepared and doped into PLA matrix by solution pouring method to prepare a composite film (PLA/PEI-HMSN). The effects of thermal, optical and hydrophobic properties of composite films were studied in detail. The results showed that PEI-HMSN can be uniformly dispersed in PLA matrix, and the elongation at break and tensile strength of PLA/PEI-HMSN composite film were improved. The hydrophobicity of PLA/PEI-HMSN composite film was improved. The PEI modified HMSN can improve the performance of PLA film, which provides an experimental basis for the application of PLA in packaging field.
聚乳酸 / 二氧化硅 / 中空结构 / 聚乙烯亚胺 / 复合膜
PLA / Silica dioxide / Hollow structure / Polyethyleneimine / Composite film
TQ323.4 / TQ327.9
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