纳米氧化铈/线性低密度聚乙烯农用紫外屏蔽膜的制备及性能研究OA

Nano-cerium oxide(Nano-CeO2)powder was prepared using a sand mill,and the effects of three dispersants on the particle size distribution and morphology of Nano-CeO2 powder were investigated.Linear low-density polyethylene(LLDPE)agricultural ultraviolet shielding membranes containing Nano-CeO2 were fabricated through melt blending,granulation,and extrusion blow molding processes,and their properties were evaluated.The results showed that Nano-CeO2 prepared with dispersants anionic polycarboxylate dispersant(CE64)and modified fatty acid ester(RB)exhibited particle sizes around 50 nm,and the membrane surfaces were smooth without large particle agglomeration.The membranes containing CE64 and RB demonstrated high absorbance in the ultraviolet region,indicating that these two ultraviolet shielding membranes could absorb harmful ultraviolet light in sunlight for plant growth and effectively achieve light quality regulation.The light transmittance of three ultraviolet shielding membranes decreased slightly,indicating that Nano-CeO2 has a minimal effect on the light transmittance of the thin film.The mechanical properties of all three ultraviolet shielding membranes were improved.