具有增强的机械性能和阻隔性能的可生物降解 PBAT/PLA/CaCO3 吹膜：CaCO3 颗粒尺寸和含量的研究,Macromolecular Materials and Engineering

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具有增强的机械性能和阻隔性能的可生物降解 PBAT/PLA/CaCO3 吹膜：CaCO3 颗粒尺寸和含量的研究
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2022-05-18 , DOI: 10.1002/mame.202200135
Fahang Ma ₁ , Bo Wang ₂ , Xuefei Leng ₁ , Ying Wang ₃ , Zhijing Sun ₃ , Pei Wang ₄ , Lin Sang ₅ , Zhiyong Wei ₁

Affiliation

使用一步熔融共混和随后的吹膜制备具有可变组成的可生物降解的聚（己二酸丁二醇酯-共聚对苯二甲酸酯）/聚（乳酸）/碳酸钙（PBAT/PLA/CaCO _{3 ）共混膜。}研究了CaCO ₃含量和粒径对薄膜理化性质的影响。流变学结果表明储能模量和复数粘度随着CaCO ₃含量的增加而增加。_{通过添加CaCO 3}，还提高了包括纵向（MD）和横向（TD）的拉伸性能和抗撕裂性。特别是 P7/P3/C ₃₀₀₀^{30在MD上分别实现了31±2.5 MPa和99±4.0 N mm -1}的最高拉伸强度和撕裂强度。_{与未填充的PBAT/PLA薄膜相比，掺入CaCO 3}颗粒后，水蒸气透过率从621下降到287 g m ^-2 24 h，氧气透过率也从1400下降到1010 cm ³ m ^-2 d Pa 。在 PBAT/PLA/CaCO ₃中检测到热稳定性略有下降，但总体而言，分解温度远高于加工和使用温度。因此，具有低成本 CaCO _{3的可生物降解 PBAT/PLA 薄膜}填料表现出优异的机械和氧气和水分阻隔性能，在农业领域的食品包装和地膜中显示出巨大的潜力。

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Biodegradable PBAT/PLA/CaCO3 Blowing Films with Enhanced Mechanical and Barrier Properties: Investigation of Size and Content of CaCO3 Particles

Biodegradable poly(butylene adipate-co-terephthalate)/poly(lactic acid)/calcium carbonate (PBAT/PLA/CaCO₃) blend films with variable compositions are prepared using one-step melt-blending and a following film-blowing. The effects of CaCO₃ content and particle size on the physicochemical properties of the films are investigated. The rheology results demonstrate that the storage modulus and complex viscosity are increased with the increasing CaCO₃ content. The tensile performance and tear resistance including both the machine direction (MD) and transverse direction (TD) are also improved by adding CaCO₃. Especially, P7/P3/C₃₀₀₀30 achieves the highest tensile and tearing strength in MD of 31 ± 2.5 MPa and 99 ± 4.0 N mm⁻¹, respectively. Compared with unfilled PBAT/PLA films, the water vapor transmission greatly declines from 621 to 287 g m⁻² 24 h and the oxygen transmission values are also reduced from 1400 to 1010 cm³ m⁻² d Pa after the incorporation of CaCO₃ particles. A slight decrease in thermal stability is detected in PBAT/PLA/CaCO₃, but overall, the decomposition temperature is much higher than the processing and service temperature. Therefore, the biodegradable PBAT/PLA films with low-cost CaCO₃ fillers demonstrate excellent mechanical and oxygen and moisture barrier performance, which show great potentials in food-packaging and mulch film in the agriculture field.

更新日期：2022-05-18

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