以Mg²⁺、Al³⁺、Ce³⁺的硝酸盐为原料，通过共沉淀法合成水滑石（LDHs）。采用十二烷基硫酸钠（SDS）作为插层剂制备有机改性水滑石（LDHs-SDS）。结构表征表明：LDHs-SDS的接触角由30.0°增加至107.7°。X射线衍射仪（XRD）分析结果显示，LDHs-SDS的层间距增加0.3 nm。傅里叶变换红外光谱仪（FTIR）分析与XRD结果相互印证。随后，以LDHs-SDS为助剂，制备PLA/LDHs-SDS吹塑薄膜，对其性能及紫外老化行为进行研究。结果表明：当LDHs-SDS的质量分数达到0.5%时，PLA薄膜的断裂伸长率显著提高。差示扫描量热法（DSC）分析表明，LDHs-SDS的异相成核作用提高了PLA薄膜的结晶性能。紫外屏蔽性测试显示，LDHs-SDS的添加增强了PLA薄膜的紫外屏蔽性。紫外老化研究表明，相比PLA0，PLA3薄膜具有显著的抗紫外老化性，其老化动力学拟合符合二级反应动力学模型。

Using Mg²⁺, Al³⁺ and Ce³⁺ nitrate as the raw materials, layered double hydroxides (LDHs) were synthesized via the co-precipitation method. Sodium dodecyl sulfate (SDS) was used as an intercalating agent to prepare organically modified layered double hydroxides (LDHs-SDS). Structural characterization showed that the contact angle of LDHs-SDS was increased from 30.0° to 107.7°. XRD analysis results showed that the layer spacing of LDHs-SDS was increased by 0.3 nm. FTIR analysis was consistent with XRD results. Then poly(lactic acid) (PLA)/LDHs-SDS blown molding film was prepared with LDHs-SDS as additives, and its properties and ultraviolet aging behavior were studied. The results showed that the elongation at break of PLA films could be significantly increased when the mass fraction of LDHs-SDS was 0.5%. DSC analysis showed that the crystallization properties of PLA films were improved due to the heterogeneous nucleation of LDHs-SDS. The UV shielding test showed that the addition of LDHs-SDS enhanced the UV shielding property of PLA film. The results of UV aging showed that PLA3 film had remarkable UV aging resistance compared with PLA0, and its aging kinetics fitting conformed to the second-order reaction kinetics model.