溶液插层法制备聚乳酸/SDS改性镁铝水滑石纳米复合材料及其性能表征

Preparation and Properties Characterization on Polylactic Acid/SDS-Mg-Al-LDHs Nanocomposite by Solution Intercalation

通过微波辐照制备镁铝水滑石(Mg-Al-LDHs),并用十二烷基硫酸钠(SDS)改性制备SDS有机改性镁铝水滑石(SDS-Mg-Al-LDHs)。以其为助剂,采用溶液插层法制备聚乳酸/SDS改性镁铝水滑石(PLA/SDS-Mg-Al-LDHs)纳米复合材料,并且测定其力学性能、热稳定性、降解性。通过X射线衍射仪(XRD)、傅里叶红外光谱仪(FT-IR)、透射电子显微镜(TEM)、热重分析仪(TG)对材料进行表征和结构分析。结果表明:SDS-Mg-Al-LDHs用量达到3%时,PLA/SDS-Mg-Al-LDHs纳米复合材料的力学性能达到最大.同时加入SDS-Al-LDHs提高了PLA纳米复合材料的热稳定性。降解性研究表明SDS-Mg-Al-LDHs有利于提高PLA的可降解性。

Mg-Al-LDHs had been prepared by microwave irradiation, and SDS-Mg-Al - LDHs had been modified by sodium dodecyl sulfate （SDS） with M g-Al-LDHs. Polylactic acid （PLA）/SDS-Mg-Al-LDHs nanocomposite were prepared by solution intercalated method with SDS-Mg-Al-LDHs as the fillers. The mechanical properties,thermal stability and degradation of the PLA/SDS-Mg-Al-LDHs nanocomposite were measured. Moreover,the structure characterizations of the PLA/SDS-Mg-Al- LDHs nanocomposite were studied by X-ray diffraction （XRD）, Fourier transform infrared spectroscopy （FT-IR） , Projected electronic microscope （TEM） , thermal gravimetric analysis （TG） ,respectively. It was shown that the mechanical properties of PLA/SDS-Mg-Al-LDHs nanocomposite reached to the maximum when the amount of SDS-Mg-A1-LDHs was 3 %. Furthermore, SDS-Al-LDHs improved the thermal stability and biodegradability of the PLA nanocomposite.